2 ******************************************************************************
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3 * @file stm32f10x_rcc.c
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4 * @author MCD Application Team
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7 * @brief This file provides all the RCC firmware functions.
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8 ******************************************************************************
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11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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18 * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2>
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21 /* Includes ------------------------------------------------------------------*/
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22 #include "stm32f10x_rcc.h"
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24 /** @addtogroup STM32F10x_StdPeriph_Driver
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29 * @brief RCC driver modules
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33 /** @defgroup RCC_Private_TypesDefinitions
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41 /** @defgroup RCC_Private_Defines
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45 /* ------------ RCC registers bit address in the alias region ----------- */
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46 #define RCC_OFFSET (RCC_BASE - PERIPH_BASE)
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48 /* --- CR Register ---*/
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50 /* Alias word address of HSION bit */
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51 #define CR_OFFSET (RCC_OFFSET + 0x00)
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52 #define HSION_BitNumber 0x00
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53 #define CR_HSION_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (HSION_BitNumber * 4))
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55 /* Alias word address of PLLON bit */
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56 #define PLLON_BitNumber 0x18
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57 #define CR_PLLON_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PLLON_BitNumber * 4))
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60 /* Alias word address of PLL2ON bit */
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61 #define PLL2ON_BitNumber 0x1A
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62 #define CR_PLL2ON_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PLL2ON_BitNumber * 4))
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64 /* Alias word address of PLL3ON bit */
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65 #define PLL3ON_BitNumber 0x1C
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66 #define CR_PLL3ON_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PLL3ON_BitNumber * 4))
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67 #endif /* STM32F10X_CL */
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69 /* Alias word address of CSSON bit */
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70 #define CSSON_BitNumber 0x13
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71 #define CR_CSSON_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (CSSON_BitNumber * 4))
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73 /* --- CFGR Register ---*/
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75 /* Alias word address of USBPRE bit */
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76 #define CFGR_OFFSET (RCC_OFFSET + 0x04)
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78 #ifndef STM32F10X_CL
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79 #define USBPRE_BitNumber 0x16
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80 #define CFGR_USBPRE_BB (PERIPH_BB_BASE + (CFGR_OFFSET * 32) + (USBPRE_BitNumber * 4))
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82 #define OTGFSPRE_BitNumber 0x16
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83 #define CFGR_OTGFSPRE_BB (PERIPH_BB_BASE + (CFGR_OFFSET * 32) + (OTGFSPRE_BitNumber * 4))
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84 #endif /* STM32F10X_CL */
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86 /* --- BDCR Register ---*/
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88 /* Alias word address of RTCEN bit */
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89 #define BDCR_OFFSET (RCC_OFFSET + 0x20)
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90 #define RTCEN_BitNumber 0x0F
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91 #define BDCR_RTCEN_BB (PERIPH_BB_BASE + (BDCR_OFFSET * 32) + (RTCEN_BitNumber * 4))
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93 /* Alias word address of BDRST bit */
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94 #define BDRST_BitNumber 0x10
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95 #define BDCR_BDRST_BB (PERIPH_BB_BASE + (BDCR_OFFSET * 32) + (BDRST_BitNumber * 4))
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97 /* --- CSR Register ---*/
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99 /* Alias word address of LSION bit */
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100 #define CSR_OFFSET (RCC_OFFSET + 0x24)
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101 #define LSION_BitNumber 0x00
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102 #define CSR_LSION_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (LSION_BitNumber * 4))
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104 #ifdef STM32F10X_CL
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105 /* --- CFGR2 Register ---*/
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107 /* Alias word address of I2S2SRC bit */
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108 #define CFGR2_OFFSET (RCC_OFFSET + 0x2C)
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109 #define I2S2SRC_BitNumber 0x11
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110 #define CFGR2_I2S2SRC_BB (PERIPH_BB_BASE + (CFGR2_OFFSET * 32) + (I2S2SRC_BitNumber * 4))
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112 /* Alias word address of I2S3SRC bit */
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113 #define I2S3SRC_BitNumber 0x12
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114 #define CFGR2_I2S3SRC_BB (PERIPH_BB_BASE + (CFGR2_OFFSET * 32) + (I2S3SRC_BitNumber * 4))
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115 #endif /* STM32F10X_CL */
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117 /* ---------------------- RCC registers bit mask ------------------------ */
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119 /* CR register bit mask */
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120 #define CR_HSEBYP_Reset ((uint32_t)0xFFFBFFFF)
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121 #define CR_HSEBYP_Set ((uint32_t)0x00040000)
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122 #define CR_HSEON_Reset ((uint32_t)0xFFFEFFFF)
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123 #define CR_HSEON_Set ((uint32_t)0x00010000)
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124 #define CR_HSITRIM_Mask ((uint32_t)0xFFFFFF07)
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126 /* CFGR register bit mask */
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127 #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_CL)
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128 #define CFGR_PLL_Mask ((uint32_t)0xFFC2FFFF)
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130 #define CFGR_PLL_Mask ((uint32_t)0xFFC0FFFF)
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131 #endif /* STM32F10X_CL */
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133 #define CFGR_PLLMull_Mask ((uint32_t)0x003C0000)
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134 #define CFGR_PLLSRC_Mask ((uint32_t)0x00010000)
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135 #define CFGR_PLLXTPRE_Mask ((uint32_t)0x00020000)
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136 #define CFGR_SWS_Mask ((uint32_t)0x0000000C)
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137 #define CFGR_SW_Mask ((uint32_t)0xFFFFFFFC)
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138 #define CFGR_HPRE_Reset_Mask ((uint32_t)0xFFFFFF0F)
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139 #define CFGR_HPRE_Set_Mask ((uint32_t)0x000000F0)
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140 #define CFGR_PPRE1_Reset_Mask ((uint32_t)0xFFFFF8FF)
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141 #define CFGR_PPRE1_Set_Mask ((uint32_t)0x00000700)
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142 #define CFGR_PPRE2_Reset_Mask ((uint32_t)0xFFFFC7FF)
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143 #define CFGR_PPRE2_Set_Mask ((uint32_t)0x00003800)
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144 #define CFGR_ADCPRE_Reset_Mask ((uint32_t)0xFFFF3FFF)
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145 #define CFGR_ADCPRE_Set_Mask ((uint32_t)0x0000C000)
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147 /* CSR register bit mask */
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148 #define CSR_RMVF_Set ((uint32_t)0x01000000)
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150 #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_CL)
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151 /* CFGR2 register bit mask */
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152 #define CFGR2_PREDIV1SRC ((uint32_t)0x00010000)
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153 #define CFGR2_PREDIV1 ((uint32_t)0x0000000F)
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155 #ifdef STM32F10X_CL
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156 #define CFGR2_PREDIV2 ((uint32_t)0x000000F0)
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157 #define CFGR2_PLL2MUL ((uint32_t)0x00000F00)
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158 #define CFGR2_PLL3MUL ((uint32_t)0x0000F000)
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159 #endif /* STM32F10X_CL */
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161 /* RCC Flag Mask */
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162 #define FLAG_Mask ((uint8_t)0x1F)
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165 /* Typical Value of the HSI in Hz */
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166 #define HSI_Value ((uint32_t)8000000)
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167 #endif /* HSI_Value */
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169 /* CIR register byte 2 (Bits[15:8]) base address */
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170 #define CIR_BYTE2_ADDRESS ((uint32_t)0x40021009)
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172 /* CIR register byte 3 (Bits[23:16]) base address */
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173 #define CIR_BYTE3_ADDRESS ((uint32_t)0x4002100A)
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175 /* CFGR register byte 4 (Bits[31:24]) base address */
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176 #define CFGR_BYTE4_ADDRESS ((uint32_t)0x40021007)
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178 /* BDCR register base address */
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179 #define BDCR_ADDRESS (PERIPH_BASE + BDCR_OFFSET)
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181 #ifndef HSEStartUp_TimeOut
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182 /* Time out for HSE start up */
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183 #define HSEStartUp_TimeOut ((uint16_t)0x0500)
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184 #endif /* HSEStartUp_TimeOut */
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190 /** @defgroup RCC_Private_Macros
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198 /** @defgroup RCC_Private_Variables
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202 static __I uint8_t APBAHBPrescTable[16] = {0, 0, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 6, 7, 8, 9};
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203 static __I uint8_t ADCPrescTable[4] = {2, 4, 6, 8};
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209 /** @defgroup RCC_Private_FunctionPrototypes
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217 /** @defgroup RCC_Private_Functions
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222 * @brief Resets the RCC clock configuration to the default reset state.
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226 void RCC_DeInit(void)
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228 /* Set HSION bit */
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229 RCC->CR |= (uint32_t)0x00000001;
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231 /* Reset SW, HPRE, PPRE1, PPRE2, ADCPRE and MCO bits */
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232 #ifndef STM32F10X_CL
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233 RCC->CFGR &= (uint32_t)0xF8FF0000;
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235 RCC->CFGR &= (uint32_t)0xF0FF0000;
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236 #endif /* STM32F10X_CL */
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238 /* Reset HSEON, CSSON and PLLON bits */
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239 RCC->CR &= (uint32_t)0xFEF6FFFF;
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241 /* Reset HSEBYP bit */
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242 RCC->CR &= (uint32_t)0xFFFBFFFF;
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244 /* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE/OTGFSPRE bits */
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245 RCC->CFGR &= (uint32_t)0xFF80FFFF;
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247 #ifdef STM32F10X_CL
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248 /* Reset PLL2ON and PLL3ON bits */
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249 RCC->CR &= (uint32_t)0xEBFFFFFF;
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251 /* Disable all interrupts and clear pending bits */
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252 RCC->CIR = 0x00FF0000;
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254 /* Reset CFGR2 register */
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255 RCC->CFGR2 = 0x00000000;
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256 #elif defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL)
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257 /* Disable all interrupts and clear pending bits */
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258 RCC->CIR = 0x009F0000;
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260 /* Reset CFGR2 register */
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261 RCC->CFGR2 = 0x00000000;
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263 /* Disable all interrupts and clear pending bits */
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264 RCC->CIR = 0x009F0000;
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265 #endif /* STM32F10X_CL */
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270 * @brief Configures the External High Speed oscillator (HSE).
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271 * @note HSE can not be stopped if it is used directly or through the PLL as system clock.
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272 * @param RCC_HSE: specifies the new state of the HSE.
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273 * This parameter can be one of the following values:
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274 * @arg RCC_HSE_OFF: HSE oscillator OFF
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275 * @arg RCC_HSE_ON: HSE oscillator ON
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276 * @arg RCC_HSE_Bypass: HSE oscillator bypassed with external clock
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279 void RCC_HSEConfig(uint32_t RCC_HSE)
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281 /* Check the parameters */
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282 assert_param(IS_RCC_HSE(RCC_HSE));
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283 /* Reset HSEON and HSEBYP bits before configuring the HSE ------------------*/
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284 /* Reset HSEON bit */
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285 RCC->CR &= CR_HSEON_Reset;
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286 /* Reset HSEBYP bit */
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287 RCC->CR &= CR_HSEBYP_Reset;
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288 /* Configure HSE (RCC_HSE_OFF is already covered by the code section above) */
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292 /* Set HSEON bit */
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293 RCC->CR |= CR_HSEON_Set;
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296 case RCC_HSE_Bypass:
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297 /* Set HSEBYP and HSEON bits */
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298 RCC->CR |= CR_HSEBYP_Set | CR_HSEON_Set;
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307 * @brief Waits for HSE start-up.
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309 * @retval An ErrorStatus enumuration value:
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310 * - SUCCESS: HSE oscillator is stable and ready to use
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311 * - ERROR: HSE oscillator not yet ready
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313 ErrorStatus RCC_WaitForHSEStartUp(void)
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315 __IO uint32_t StartUpCounter = 0;
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316 ErrorStatus status = ERROR;
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317 FlagStatus HSEStatus = RESET;
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319 /* Wait till HSE is ready and if Time out is reached exit */
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322 HSEStatus = RCC_GetFlagStatus(RCC_FLAG_HSERDY);
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324 } while((StartUpCounter != HSEStartUp_TimeOut) && (HSEStatus == RESET));
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326 if (RCC_GetFlagStatus(RCC_FLAG_HSERDY) != RESET)
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338 * @brief Adjusts the Internal High Speed oscillator (HSI) calibration value.
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339 * @param HSICalibrationValue: specifies the calibration trimming value.
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340 * This parameter must be a number between 0 and 0x1F.
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343 void RCC_AdjustHSICalibrationValue(uint8_t HSICalibrationValue)
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345 uint32_t tmpreg = 0;
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346 /* Check the parameters */
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347 assert_param(IS_RCC_CALIBRATION_VALUE(HSICalibrationValue));
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349 /* Clear HSITRIM[4:0] bits */
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350 tmpreg &= CR_HSITRIM_Mask;
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351 /* Set the HSITRIM[4:0] bits according to HSICalibrationValue value */
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352 tmpreg |= (uint32_t)HSICalibrationValue << 3;
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353 /* Store the new value */
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358 * @brief Enables or disables the Internal High Speed oscillator (HSI).
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359 * @note HSI can not be stopped if it is used directly or through the PLL as system clock.
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360 * @param NewState: new state of the HSI. This parameter can be: ENABLE or DISABLE.
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363 void RCC_HSICmd(FunctionalState NewState)
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365 /* Check the parameters */
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366 assert_param(IS_FUNCTIONAL_STATE(NewState));
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367 *(__IO uint32_t *) CR_HSION_BB = (uint32_t)NewState;
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371 * @brief Configures the PLL clock source and multiplication factor.
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372 * @note This function must be used only when the PLL is disabled.
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373 * @param RCC_PLLSource: specifies the PLL entry clock source.
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374 * For @b STM32_Connectivity_line_devices or @b STM32_Value_line_devices,
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375 * this parameter can be one of the following values:
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376 * @arg RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 selected as PLL clock entry
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377 * @arg RCC_PLLSource_PREDIV1: PREDIV1 clock selected as PLL clock entry
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378 * For @b other_STM32_devices, this parameter can be one of the following values:
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379 * @arg RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 selected as PLL clock entry
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380 * @arg RCC_PLLSource_HSE_Div1: HSE oscillator clock selected as PLL clock entry
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381 * @arg RCC_PLLSource_HSE_Div2: HSE oscillator clock divided by 2 selected as PLL clock entry
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382 * @param RCC_PLLMul: specifies the PLL multiplication factor.
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383 * For @b STM32_Connectivity_line_devices, this parameter can be RCC_PLLMul_x where x:{[4,9], 6_5}
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384 * For @b other_STM32_devices, this parameter can be RCC_PLLMul_x where x:[2,16]
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387 void RCC_PLLConfig(uint32_t RCC_PLLSource, uint32_t RCC_PLLMul)
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389 uint32_t tmpreg = 0;
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391 /* Check the parameters */
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392 assert_param(IS_RCC_PLL_SOURCE(RCC_PLLSource));
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393 assert_param(IS_RCC_PLL_MUL(RCC_PLLMul));
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395 tmpreg = RCC->CFGR;
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396 /* Clear PLLSRC, PLLXTPRE and PLLMUL[3:0] bits */
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397 tmpreg &= CFGR_PLL_Mask;
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398 /* Set the PLL configuration bits */
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399 tmpreg |= RCC_PLLSource | RCC_PLLMul;
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400 /* Store the new value */
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401 RCC->CFGR = tmpreg;
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405 * @brief Enables or disables the PLL.
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406 * @note The PLL can not be disabled if it is used as system clock.
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407 * @param NewState: new state of the PLL. This parameter can be: ENABLE or DISABLE.
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410 void RCC_PLLCmd(FunctionalState NewState)
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412 /* Check the parameters */
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413 assert_param(IS_FUNCTIONAL_STATE(NewState));
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415 *(__IO uint32_t *) CR_PLLON_BB = (uint32_t)NewState;
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418 #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_CL)
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420 * @brief Configures the PREDIV1 division factor.
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422 * - This function must be used only when the PLL is disabled.
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423 * - This function applies only to STM32 Connectivity line and Value line
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425 * @param RCC_PREDIV1_Source: specifies the PREDIV1 clock source.
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426 * This parameter can be one of the following values:
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427 * @arg RCC_PREDIV1_Source_HSE: HSE selected as PREDIV1 clock
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428 * @arg RCC_PREDIV1_Source_PLL2: PLL2 selected as PREDIV1 clock
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430 * For @b STM32_Value_line_devices this parameter is always RCC_PREDIV1_Source_HSE
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431 * @param RCC_PREDIV1_Div: specifies the PREDIV1 clock division factor.
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432 * This parameter can be RCC_PREDIV1_Divx where x:[1,16]
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435 void RCC_PREDIV1Config(uint32_t RCC_PREDIV1_Source, uint32_t RCC_PREDIV1_Div)
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437 uint32_t tmpreg = 0;
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439 /* Check the parameters */
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440 assert_param(IS_RCC_PREDIV1_SOURCE(RCC_PREDIV1_Source));
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441 assert_param(IS_RCC_PREDIV1(RCC_PREDIV1_Div));
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443 tmpreg = RCC->CFGR2;
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444 /* Clear PREDIV1[3:0] and PREDIV1SRC bits */
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445 tmpreg &= ~(CFGR2_PREDIV1 | CFGR2_PREDIV1SRC);
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446 /* Set the PREDIV1 clock source and division factor */
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447 tmpreg |= RCC_PREDIV1_Source | RCC_PREDIV1_Div ;
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448 /* Store the new value */
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449 RCC->CFGR2 = tmpreg;
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453 #ifdef STM32F10X_CL
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455 * @brief Configures the PREDIV2 division factor.
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457 * - This function must be used only when both PLL2 and PLL3 are disabled.
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458 * - This function applies only to STM32 Connectivity line devices.
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459 * @param RCC_PREDIV2_Div: specifies the PREDIV2 clock division factor.
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460 * This parameter can be RCC_PREDIV2_Divx where x:[1,16]
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463 void RCC_PREDIV2Config(uint32_t RCC_PREDIV2_Div)
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465 uint32_t tmpreg = 0;
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467 /* Check the parameters */
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468 assert_param(IS_RCC_PREDIV2(RCC_PREDIV2_Div));
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470 tmpreg = RCC->CFGR2;
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471 /* Clear PREDIV2[3:0] bits */
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472 tmpreg &= ~CFGR2_PREDIV2;
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473 /* Set the PREDIV2 division factor */
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474 tmpreg |= RCC_PREDIV2_Div;
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475 /* Store the new value */
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476 RCC->CFGR2 = tmpreg;
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480 * @brief Configures the PLL2 multiplication factor.
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482 * - This function must be used only when the PLL2 is disabled.
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483 * - This function applies only to STM32 Connectivity line devices.
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484 * @param RCC_PLL2Mul: specifies the PLL2 multiplication factor.
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485 * This parameter can be RCC_PLL2Mul_x where x:{[8,14], 16, 20}
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488 void RCC_PLL2Config(uint32_t RCC_PLL2Mul)
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490 uint32_t tmpreg = 0;
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492 /* Check the parameters */
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493 assert_param(IS_RCC_PLL2_MUL(RCC_PLL2Mul));
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495 tmpreg = RCC->CFGR2;
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496 /* Clear PLL2Mul[3:0] bits */
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497 tmpreg &= ~CFGR2_PLL2MUL;
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498 /* Set the PLL2 configuration bits */
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499 tmpreg |= RCC_PLL2Mul;
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500 /* Store the new value */
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501 RCC->CFGR2 = tmpreg;
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506 * @brief Enables or disables the PLL2.
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508 * - The PLL2 can not be disabled if it is used indirectly as system clock
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509 * (i.e. it is used as PLL clock entry that is used as System clock).
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510 * - This function applies only to STM32 Connectivity line devices.
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511 * @param NewState: new state of the PLL2. This parameter can be: ENABLE or DISABLE.
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514 void RCC_PLL2Cmd(FunctionalState NewState)
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516 /* Check the parameters */
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517 assert_param(IS_FUNCTIONAL_STATE(NewState));
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519 *(__IO uint32_t *) CR_PLL2ON_BB = (uint32_t)NewState;
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524 * @brief Configures the PLL3 multiplication factor.
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526 * - This function must be used only when the PLL3 is disabled.
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527 * - This function applies only to STM32 Connectivity line devices.
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528 * @param RCC_PLL3Mul: specifies the PLL3 multiplication factor.
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529 * This parameter can be RCC_PLL3Mul_x where x:{[8,14], 16, 20}
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532 void RCC_PLL3Config(uint32_t RCC_PLL3Mul)
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534 uint32_t tmpreg = 0;
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536 /* Check the parameters */
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537 assert_param(IS_RCC_PLL3_MUL(RCC_PLL3Mul));
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539 tmpreg = RCC->CFGR2;
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540 /* Clear PLL3Mul[3:0] bits */
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541 tmpreg &= ~CFGR2_PLL3MUL;
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542 /* Set the PLL3 configuration bits */
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543 tmpreg |= RCC_PLL3Mul;
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544 /* Store the new value */
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545 RCC->CFGR2 = tmpreg;
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550 * @brief Enables or disables the PLL3.
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551 * @note This function applies only to STM32 Connectivity line devices.
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552 * @param NewState: new state of the PLL3. This parameter can be: ENABLE or DISABLE.
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555 void RCC_PLL3Cmd(FunctionalState NewState)
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557 /* Check the parameters */
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559 assert_param(IS_FUNCTIONAL_STATE(NewState));
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560 *(__IO uint32_t *) CR_PLL3ON_BB = (uint32_t)NewState;
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562 #endif /* STM32F10X_CL */
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565 * @brief Configures the system clock (SYSCLK).
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566 * @param RCC_SYSCLKSource: specifies the clock source used as system clock.
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567 * This parameter can be one of the following values:
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568 * @arg RCC_SYSCLKSource_HSI: HSI selected as system clock
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569 * @arg RCC_SYSCLKSource_HSE: HSE selected as system clock
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570 * @arg RCC_SYSCLKSource_PLLCLK: PLL selected as system clock
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573 void RCC_SYSCLKConfig(uint32_t RCC_SYSCLKSource)
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575 uint32_t tmpreg = 0;
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576 /* Check the parameters */
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577 assert_param(IS_RCC_SYSCLK_SOURCE(RCC_SYSCLKSource));
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578 tmpreg = RCC->CFGR;
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579 /* Clear SW[1:0] bits */
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580 tmpreg &= CFGR_SW_Mask;
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581 /* Set SW[1:0] bits according to RCC_SYSCLKSource value */
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582 tmpreg |= RCC_SYSCLKSource;
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583 /* Store the new value */
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584 RCC->CFGR = tmpreg;
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588 * @brief Returns the clock source used as system clock.
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590 * @retval The clock source used as system clock. The returned value can
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591 * be one of the following:
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592 * - 0x00: HSI used as system clock
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593 * - 0x04: HSE used as system clock
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594 * - 0x08: PLL used as system clock
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596 uint8_t RCC_GetSYSCLKSource(void)
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598 return ((uint8_t)(RCC->CFGR & CFGR_SWS_Mask));
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602 * @brief Configures the AHB clock (HCLK).
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603 * @param RCC_SYSCLK: defines the AHB clock divider. This clock is derived from
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604 * the system clock (SYSCLK).
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605 * This parameter can be one of the following values:
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606 * @arg RCC_SYSCLK_Div1: AHB clock = SYSCLK
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607 * @arg RCC_SYSCLK_Div2: AHB clock = SYSCLK/2
\r
608 * @arg RCC_SYSCLK_Div4: AHB clock = SYSCLK/4
\r
609 * @arg RCC_SYSCLK_Div8: AHB clock = SYSCLK/8
\r
610 * @arg RCC_SYSCLK_Div16: AHB clock = SYSCLK/16
\r
611 * @arg RCC_SYSCLK_Div64: AHB clock = SYSCLK/64
\r
612 * @arg RCC_SYSCLK_Div128: AHB clock = SYSCLK/128
\r
613 * @arg RCC_SYSCLK_Div256: AHB clock = SYSCLK/256
\r
614 * @arg RCC_SYSCLK_Div512: AHB clock = SYSCLK/512
\r
617 void RCC_HCLKConfig(uint32_t RCC_SYSCLK)
\r
619 uint32_t tmpreg = 0;
\r
620 /* Check the parameters */
\r
621 assert_param(IS_RCC_HCLK(RCC_SYSCLK));
\r
622 tmpreg = RCC->CFGR;
\r
623 /* Clear HPRE[3:0] bits */
\r
624 tmpreg &= CFGR_HPRE_Reset_Mask;
\r
625 /* Set HPRE[3:0] bits according to RCC_SYSCLK value */
\r
626 tmpreg |= RCC_SYSCLK;
\r
627 /* Store the new value */
\r
628 RCC->CFGR = tmpreg;
\r
632 * @brief Configures the Low Speed APB clock (PCLK1).
\r
633 * @param RCC_HCLK: defines the APB1 clock divider. This clock is derived from
\r
634 * the AHB clock (HCLK).
\r
635 * This parameter can be one of the following values:
\r
636 * @arg RCC_HCLK_Div1: APB1 clock = HCLK
\r
637 * @arg RCC_HCLK_Div2: APB1 clock = HCLK/2
\r
638 * @arg RCC_HCLK_Div4: APB1 clock = HCLK/4
\r
639 * @arg RCC_HCLK_Div8: APB1 clock = HCLK/8
\r
640 * @arg RCC_HCLK_Div16: APB1 clock = HCLK/16
\r
643 void RCC_PCLK1Config(uint32_t RCC_HCLK)
\r
645 uint32_t tmpreg = 0;
\r
646 /* Check the parameters */
\r
647 assert_param(IS_RCC_PCLK(RCC_HCLK));
\r
648 tmpreg = RCC->CFGR;
\r
649 /* Clear PPRE1[2:0] bits */
\r
650 tmpreg &= CFGR_PPRE1_Reset_Mask;
\r
651 /* Set PPRE1[2:0] bits according to RCC_HCLK value */
\r
652 tmpreg |= RCC_HCLK;
\r
653 /* Store the new value */
\r
654 RCC->CFGR = tmpreg;
\r
658 * @brief Configures the High Speed APB clock (PCLK2).
\r
659 * @param RCC_HCLK: defines the APB2 clock divider. This clock is derived from
\r
660 * the AHB clock (HCLK).
\r
661 * This parameter can be one of the following values:
\r
662 * @arg RCC_HCLK_Div1: APB2 clock = HCLK
\r
663 * @arg RCC_HCLK_Div2: APB2 clock = HCLK/2
\r
664 * @arg RCC_HCLK_Div4: APB2 clock = HCLK/4
\r
665 * @arg RCC_HCLK_Div8: APB2 clock = HCLK/8
\r
666 * @arg RCC_HCLK_Div16: APB2 clock = HCLK/16
\r
669 void RCC_PCLK2Config(uint32_t RCC_HCLK)
\r
671 uint32_t tmpreg = 0;
\r
672 /* Check the parameters */
\r
673 assert_param(IS_RCC_PCLK(RCC_HCLK));
\r
674 tmpreg = RCC->CFGR;
\r
675 /* Clear PPRE2[2:0] bits */
\r
676 tmpreg &= CFGR_PPRE2_Reset_Mask;
\r
677 /* Set PPRE2[2:0] bits according to RCC_HCLK value */
\r
678 tmpreg |= RCC_HCLK << 3;
\r
679 /* Store the new value */
\r
680 RCC->CFGR = tmpreg;
\r
684 * @brief Enables or disables the specified RCC interrupts.
\r
685 * @param RCC_IT: specifies the RCC interrupt sources to be enabled or disabled.
\r
687 * For @b STM32_Connectivity_line_devices, this parameter can be any combination
\r
688 * of the following values
\r
689 * @arg RCC_IT_LSIRDY: LSI ready interrupt
\r
690 * @arg RCC_IT_LSERDY: LSE ready interrupt
\r
691 * @arg RCC_IT_HSIRDY: HSI ready interrupt
\r
692 * @arg RCC_IT_HSERDY: HSE ready interrupt
\r
693 * @arg RCC_IT_PLLRDY: PLL ready interrupt
\r
694 * @arg RCC_IT_PLL2RDY: PLL2 ready interrupt
\r
695 * @arg RCC_IT_PLL3RDY: PLL3 ready interrupt
\r
697 * For @b other_STM32_devices, this parameter can be any combination of the
\r
698 * following values
\r
699 * @arg RCC_IT_LSIRDY: LSI ready interrupt
\r
700 * @arg RCC_IT_LSERDY: LSE ready interrupt
\r
701 * @arg RCC_IT_HSIRDY: HSI ready interrupt
\r
702 * @arg RCC_IT_HSERDY: HSE ready interrupt
\r
703 * @arg RCC_IT_PLLRDY: PLL ready interrupt
\r
705 * @param NewState: new state of the specified RCC interrupts.
\r
706 * This parameter can be: ENABLE or DISABLE.
\r
709 void RCC_ITConfig(uint8_t RCC_IT, FunctionalState NewState)
\r
711 /* Check the parameters */
\r
712 assert_param(IS_RCC_IT(RCC_IT));
\r
713 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
714 if (NewState != DISABLE)
\r
716 /* Perform Byte access to RCC_CIR bits to enable the selected interrupts */
\r
717 *(__IO uint8_t *) CIR_BYTE2_ADDRESS |= RCC_IT;
\r
721 /* Perform Byte access to RCC_CIR bits to disable the selected interrupts */
\r
722 *(__IO uint8_t *) CIR_BYTE2_ADDRESS &= (uint8_t)~RCC_IT;
\r
726 #ifndef STM32F10X_CL
\r
728 * @brief Configures the USB clock (USBCLK).
\r
729 * @param RCC_USBCLKSource: specifies the USB clock source. This clock is
\r
730 * derived from the PLL output.
\r
731 * This parameter can be one of the following values:
\r
732 * @arg RCC_USBCLKSource_PLLCLK_1Div5: PLL clock divided by 1,5 selected as USB
\r
734 * @arg RCC_USBCLKSource_PLLCLK_Div1: PLL clock selected as USB clock source
\r
737 void RCC_USBCLKConfig(uint32_t RCC_USBCLKSource)
\r
739 /* Check the parameters */
\r
740 assert_param(IS_RCC_USBCLK_SOURCE(RCC_USBCLKSource));
\r
742 *(__IO uint32_t *) CFGR_USBPRE_BB = RCC_USBCLKSource;
\r
746 * @brief Configures the USB OTG FS clock (OTGFSCLK).
\r
747 * This function applies only to STM32 Connectivity line devices.
\r
748 * @param RCC_OTGFSCLKSource: specifies the USB OTG FS clock source.
\r
749 * This clock is derived from the PLL output.
\r
750 * This parameter can be one of the following values:
\r
751 * @arg RCC_OTGFSCLKSource_PLLVCO_Div3: PLL VCO clock divided by 2 selected as USB OTG FS clock source
\r
752 * @arg RCC_OTGFSCLKSource_PLLVCO_Div2: PLL VCO clock divided by 2 selected as USB OTG FS clock source
\r
755 void RCC_OTGFSCLKConfig(uint32_t RCC_OTGFSCLKSource)
\r
757 /* Check the parameters */
\r
758 assert_param(IS_RCC_OTGFSCLK_SOURCE(RCC_OTGFSCLKSource));
\r
760 *(__IO uint32_t *) CFGR_OTGFSPRE_BB = RCC_OTGFSCLKSource;
\r
762 #endif /* STM32F10X_CL */
\r
765 * @brief Configures the ADC clock (ADCCLK).
\r
766 * @param RCC_PCLK2: defines the ADC clock divider. This clock is derived from
\r
767 * the APB2 clock (PCLK2).
\r
768 * This parameter can be one of the following values:
\r
769 * @arg RCC_PCLK2_Div2: ADC clock = PCLK2/2
\r
770 * @arg RCC_PCLK2_Div4: ADC clock = PCLK2/4
\r
771 * @arg RCC_PCLK2_Div6: ADC clock = PCLK2/6
\r
772 * @arg RCC_PCLK2_Div8: ADC clock = PCLK2/8
\r
775 void RCC_ADCCLKConfig(uint32_t RCC_PCLK2)
\r
777 uint32_t tmpreg = 0;
\r
778 /* Check the parameters */
\r
779 assert_param(IS_RCC_ADCCLK(RCC_PCLK2));
\r
780 tmpreg = RCC->CFGR;
\r
781 /* Clear ADCPRE[1:0] bits */
\r
782 tmpreg &= CFGR_ADCPRE_Reset_Mask;
\r
783 /* Set ADCPRE[1:0] bits according to RCC_PCLK2 value */
\r
784 tmpreg |= RCC_PCLK2;
\r
785 /* Store the new value */
\r
786 RCC->CFGR = tmpreg;
\r
789 #ifdef STM32F10X_CL
\r
791 * @brief Configures the I2S2 clock source(I2S2CLK).
\r
793 * - This function must be called before enabling I2S2 APB clock.
\r
794 * - This function applies only to STM32 Connectivity line devices.
\r
795 * @param RCC_I2S2CLKSource: specifies the I2S2 clock source.
\r
796 * This parameter can be one of the following values:
\r
797 * @arg RCC_I2S2CLKSource_SYSCLK: system clock selected as I2S2 clock entry
\r
798 * @arg RCC_I2S2CLKSource_PLL3_VCO: PLL3 VCO clock selected as I2S2 clock entry
\r
801 void RCC_I2S2CLKConfig(uint32_t RCC_I2S2CLKSource)
\r
803 /* Check the parameters */
\r
804 assert_param(IS_RCC_I2S2CLK_SOURCE(RCC_I2S2CLKSource));
\r
806 *(__IO uint32_t *) CFGR2_I2S2SRC_BB = RCC_I2S2CLKSource;
\r
810 * @brief Configures the I2S3 clock source(I2S2CLK).
\r
812 * - This function must be called before enabling I2S3 APB clock.
\r
813 * - This function applies only to STM32 Connectivity line devices.
\r
814 * @param RCC_I2S3CLKSource: specifies the I2S3 clock source.
\r
815 * This parameter can be one of the following values:
\r
816 * @arg RCC_I2S3CLKSource_SYSCLK: system clock selected as I2S3 clock entry
\r
817 * @arg RCC_I2S3CLKSource_PLL3_VCO: PLL3 VCO clock selected as I2S3 clock entry
\r
820 void RCC_I2S3CLKConfig(uint32_t RCC_I2S3CLKSource)
\r
822 /* Check the parameters */
\r
823 assert_param(IS_RCC_I2S3CLK_SOURCE(RCC_I2S3CLKSource));
\r
825 *(__IO uint32_t *) CFGR2_I2S3SRC_BB = RCC_I2S3CLKSource;
\r
827 #endif /* STM32F10X_CL */
\r
830 * @brief Configures the External Low Speed oscillator (LSE).
\r
831 * @param RCC_LSE: specifies the new state of the LSE.
\r
832 * This parameter can be one of the following values:
\r
833 * @arg RCC_LSE_OFF: LSE oscillator OFF
\r
834 * @arg RCC_LSE_ON: LSE oscillator ON
\r
835 * @arg RCC_LSE_Bypass: LSE oscillator bypassed with external clock
\r
838 void RCC_LSEConfig(uint8_t RCC_LSE)
\r
840 /* Check the parameters */
\r
841 assert_param(IS_RCC_LSE(RCC_LSE));
\r
842 /* Reset LSEON and LSEBYP bits before configuring the LSE ------------------*/
\r
843 /* Reset LSEON bit */
\r
844 *(__IO uint8_t *) BDCR_ADDRESS = RCC_LSE_OFF;
\r
845 /* Reset LSEBYP bit */
\r
846 *(__IO uint8_t *) BDCR_ADDRESS = RCC_LSE_OFF;
\r
847 /* Configure LSE (RCC_LSE_OFF is already covered by the code section above) */
\r
851 /* Set LSEON bit */
\r
852 *(__IO uint8_t *) BDCR_ADDRESS = RCC_LSE_ON;
\r
855 case RCC_LSE_Bypass:
\r
856 /* Set LSEBYP and LSEON bits */
\r
857 *(__IO uint8_t *) BDCR_ADDRESS = RCC_LSE_Bypass | RCC_LSE_ON;
\r
866 * @brief Enables or disables the Internal Low Speed oscillator (LSI).
\r
867 * @note LSI can not be disabled if the IWDG is running.
\r
868 * @param NewState: new state of the LSI. This parameter can be: ENABLE or DISABLE.
\r
871 void RCC_LSICmd(FunctionalState NewState)
\r
873 /* Check the parameters */
\r
874 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
875 *(__IO uint32_t *) CSR_LSION_BB = (uint32_t)NewState;
\r
879 * @brief Configures the RTC clock (RTCCLK).
\r
880 * @note Once the RTC clock is selected it can
\92t be changed unless the Backup domain is reset.
\r
881 * @param RCC_RTCCLKSource: specifies the RTC clock source.
\r
882 * This parameter can be one of the following values:
\r
883 * @arg RCC_RTCCLKSource_LSE: LSE selected as RTC clock
\r
884 * @arg RCC_RTCCLKSource_LSI: LSI selected as RTC clock
\r
885 * @arg RCC_RTCCLKSource_HSE_Div128: HSE clock divided by 128 selected as RTC clock
\r
888 void RCC_RTCCLKConfig(uint32_t RCC_RTCCLKSource)
\r
890 /* Check the parameters */
\r
891 assert_param(IS_RCC_RTCCLK_SOURCE(RCC_RTCCLKSource));
\r
892 /* Select the RTC clock source */
\r
893 RCC->BDCR |= RCC_RTCCLKSource;
\r
897 * @brief Enables or disables the RTC clock.
\r
898 * @note This function must be used only after the RTC clock was selected using the RCC_RTCCLKConfig function.
\r
899 * @param NewState: new state of the RTC clock. This parameter can be: ENABLE or DISABLE.
\r
902 void RCC_RTCCLKCmd(FunctionalState NewState)
\r
904 /* Check the parameters */
\r
905 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
906 *(__IO uint32_t *) BDCR_RTCEN_BB = (uint32_t)NewState;
\r
910 * @brief Returns the frequencies of different on chip clocks.
\r
911 * @param RCC_Clocks: pointer to a RCC_ClocksTypeDef structure which will hold
\r
912 * the clocks frequencies.
\r
915 void RCC_GetClocksFreq(RCC_ClocksTypeDef* RCC_Clocks)
\r
917 uint32_t tmp = 0, pllmull = 0, pllsource = 0, presc = 0;
\r
919 #ifdef STM32F10X_CL
\r
920 uint32_t prediv1source = 0, prediv1factor = 0, prediv2factor = 0, pll2mull = 0;
\r
921 #endif /* STM32F10X_CL */
\r
923 #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL)
\r
924 uint32_t prediv1factor = 0;
\r
927 /* Get SYSCLK source -------------------------------------------------------*/
\r
928 tmp = RCC->CFGR & CFGR_SWS_Mask;
\r
932 case 0x00: /* HSI used as system clock */
\r
933 RCC_Clocks->SYSCLK_Frequency = HSI_Value;
\r
935 case 0x04: /* HSE used as system clock */
\r
936 RCC_Clocks->SYSCLK_Frequency = HSE_Value;
\r
938 case 0x08: /* PLL used as system clock */
\r
940 /* Get PLL clock source and multiplication factor ----------------------*/
\r
941 pllmull = RCC->CFGR & CFGR_PLLMull_Mask;
\r
942 pllsource = RCC->CFGR & CFGR_PLLSRC_Mask;
\r
944 #ifndef STM32F10X_CL
\r
945 pllmull = ( pllmull >> 18) + 2;
\r
947 if (pllsource == 0x00)
\r
948 {/* HSI oscillator clock divided by 2 selected as PLL clock entry */
\r
949 RCC_Clocks->SYSCLK_Frequency = (HSI_Value >> 1) * pllmull;
\r
953 #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL)
\r
954 prediv1factor = (RCC->CFGR2 & CFGR2_PREDIV1) + 1;
\r
955 /* HSE oscillator clock selected as PREDIV1 clock entry */
\r
956 RCC_Clocks->SYSCLK_Frequency = (HSE_Value / prediv1factor) * pllmull;
\r
958 /* HSE selected as PLL clock entry */
\r
959 if ((RCC->CFGR & CFGR_PLLXTPRE_Mask) != (uint32_t)RESET)
\r
960 {/* HSE oscillator clock divided by 2 */
\r
961 RCC_Clocks->SYSCLK_Frequency = (HSE_Value >> 1) * pllmull;
\r
965 RCC_Clocks->SYSCLK_Frequency = HSE_Value * pllmull;
\r
970 pllmull = pllmull >> 18;
\r
972 if (pllmull != 0x0D)
\r
977 { /* PLL multiplication factor = PLL input clock * 6.5 */
\r
981 if (pllsource == 0x00)
\r
982 {/* HSI oscillator clock divided by 2 selected as PLL clock entry */
\r
983 RCC_Clocks->SYSCLK_Frequency = (HSI_Value >> 1) * pllmull;
\r
986 {/* PREDIV1 selected as PLL clock entry */
\r
988 /* Get PREDIV1 clock source and division factor */
\r
989 prediv1source = RCC->CFGR2 & CFGR2_PREDIV1SRC;
\r
990 prediv1factor = (RCC->CFGR2 & CFGR2_PREDIV1) + 1;
\r
992 if (prediv1source == 0)
\r
993 { /* HSE oscillator clock selected as PREDIV1 clock entry */
\r
994 RCC_Clocks->SYSCLK_Frequency = (HSE_Value / prediv1factor) * pllmull;
\r
997 {/* PLL2 clock selected as PREDIV1 clock entry */
\r
999 /* Get PREDIV2 division factor and PLL2 multiplication factor */
\r
1000 prediv2factor = ((RCC->CFGR2 & CFGR2_PREDIV2) >> 4) + 1;
\r
1001 pll2mull = ((RCC->CFGR2 & CFGR2_PLL2MUL) >> 8 ) + 2;
\r
1002 RCC_Clocks->SYSCLK_Frequency = (((HSE_Value / prediv2factor) * pll2mull) / prediv1factor) * pllmull;
\r
1005 #endif /* STM32F10X_CL */
\r
1009 RCC_Clocks->SYSCLK_Frequency = HSI_Value;
\r
1013 /* Compute HCLK, PCLK1, PCLK2 and ADCCLK clocks frequencies ----------------*/
\r
1014 /* Get HCLK prescaler */
\r
1015 tmp = RCC->CFGR & CFGR_HPRE_Set_Mask;
\r
1017 presc = APBAHBPrescTable[tmp];
\r
1018 /* HCLK clock frequency */
\r
1019 RCC_Clocks->HCLK_Frequency = RCC_Clocks->SYSCLK_Frequency >> presc;
\r
1020 /* Get PCLK1 prescaler */
\r
1021 tmp = RCC->CFGR & CFGR_PPRE1_Set_Mask;
\r
1023 presc = APBAHBPrescTable[tmp];
\r
1024 /* PCLK1 clock frequency */
\r
1025 RCC_Clocks->PCLK1_Frequency = RCC_Clocks->HCLK_Frequency >> presc;
\r
1026 /* Get PCLK2 prescaler */
\r
1027 tmp = RCC->CFGR & CFGR_PPRE2_Set_Mask;
\r
1029 presc = APBAHBPrescTable[tmp];
\r
1030 /* PCLK2 clock frequency */
\r
1031 RCC_Clocks->PCLK2_Frequency = RCC_Clocks->HCLK_Frequency >> presc;
\r
1032 /* Get ADCCLK prescaler */
\r
1033 tmp = RCC->CFGR & CFGR_ADCPRE_Set_Mask;
\r
1035 presc = ADCPrescTable[tmp];
\r
1036 /* ADCCLK clock frequency */
\r
1037 RCC_Clocks->ADCCLK_Frequency = RCC_Clocks->PCLK2_Frequency / presc;
\r
1041 * @brief Enables or disables the AHB peripheral clock.
\r
1042 * @param RCC_AHBPeriph: specifies the AHB peripheral to gates its clock.
\r
1044 * For @b STM32_Connectivity_line_devices, this parameter can be any combination
\r
1045 * of the following values:
\r
1046 * @arg RCC_AHBPeriph_DMA1
\r
1047 * @arg RCC_AHBPeriph_DMA2
\r
1048 * @arg RCC_AHBPeriph_SRAM
\r
1049 * @arg RCC_AHBPeriph_FLITF
\r
1050 * @arg RCC_AHBPeriph_CRC
\r
1051 * @arg RCC_AHBPeriph_OTG_FS
\r
1052 * @arg RCC_AHBPeriph_ETH_MAC
\r
1053 * @arg RCC_AHBPeriph_ETH_MAC_Tx
\r
1054 * @arg RCC_AHBPeriph_ETH_MAC_Rx
\r
1056 * For @b other_STM32_devices, this parameter can be any combination of the
\r
1057 * following values:
\r
1058 * @arg RCC_AHBPeriph_DMA1
\r
1059 * @arg RCC_AHBPeriph_DMA2
\r
1060 * @arg RCC_AHBPeriph_SRAM
\r
1061 * @arg RCC_AHBPeriph_FLITF
\r
1062 * @arg RCC_AHBPeriph_CRC
\r
1063 * @arg RCC_AHBPeriph_FSMC
\r
1064 * @arg RCC_AHBPeriph_SDIO
\r
1066 * @note SRAM and FLITF clock can be disabled only during sleep mode.
\r
1067 * @param NewState: new state of the specified peripheral clock.
\r
1068 * This parameter can be: ENABLE or DISABLE.
\r
1071 void RCC_AHBPeriphClockCmd(uint32_t RCC_AHBPeriph, FunctionalState NewState)
\r
1073 /* Check the parameters */
\r
1074 assert_param(IS_RCC_AHB_PERIPH(RCC_AHBPeriph));
\r
1075 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
1077 if (NewState != DISABLE)
\r
1079 RCC->AHBENR |= RCC_AHBPeriph;
\r
1083 RCC->AHBENR &= ~RCC_AHBPeriph;
\r
1088 * @brief Enables or disables the High Speed APB (APB2) peripheral clock.
\r
1089 * @param RCC_APB2Periph: specifies the APB2 peripheral to gates its clock.
\r
1090 * This parameter can be any combination of the following values:
\r
1091 * @arg RCC_APB2Periph_AFIO, RCC_APB2Periph_GPIOA, RCC_APB2Periph_GPIOB,
\r
1092 * RCC_APB2Periph_GPIOC, RCC_APB2Periph_GPIOD, RCC_APB2Periph_GPIOE,
\r
1093 * RCC_APB2Periph_GPIOF, RCC_APB2Periph_GPIOG, RCC_APB2Periph_ADC1,
\r
1094 * RCC_APB2Periph_ADC2, RCC_APB2Periph_TIM1, RCC_APB2Periph_SPI1,
\r
1095 * RCC_APB2Periph_TIM8, RCC_APB2Periph_USART1, RCC_APB2Periph_ADC3,
\r
1096 * RCC_APB2Periph_TIM15, RCC_APB2Periph_TIM16, RCC_APB2Periph_TIM17,
\r
1097 * RCC_APB2Periph_TIM9, RCC_APB2Periph_TIM10, RCC_APB2Periph_TIM11
\r
1098 * @param NewState: new state of the specified peripheral clock.
\r
1099 * This parameter can be: ENABLE or DISABLE.
\r
1102 void RCC_APB2PeriphClockCmd(uint32_t RCC_APB2Periph, FunctionalState NewState)
\r
1104 /* Check the parameters */
\r
1105 assert_param(IS_RCC_APB2_PERIPH(RCC_APB2Periph));
\r
1106 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
1107 if (NewState != DISABLE)
\r
1109 RCC->APB2ENR |= RCC_APB2Periph;
\r
1113 RCC->APB2ENR &= ~RCC_APB2Periph;
\r
1118 * @brief Enables or disables the Low Speed APB (APB1) peripheral clock.
\r
1119 * @param RCC_APB1Periph: specifies the APB1 peripheral to gates its clock.
\r
1120 * This parameter can be any combination of the following values:
\r
1121 * @arg RCC_APB1Periph_TIM2, RCC_APB1Periph_TIM3, RCC_APB1Periph_TIM4,
\r
1122 * RCC_APB1Periph_TIM5, RCC_APB1Periph_TIM6, RCC_APB1Periph_TIM7,
\r
1123 * RCC_APB1Periph_WWDG, RCC_APB1Periph_SPI2, RCC_APB1Periph_SPI3,
\r
1124 * RCC_APB1Periph_USART2, RCC_APB1Periph_USART3, RCC_APB1Periph_USART4,
\r
1125 * RCC_APB1Periph_USART5, RCC_APB1Periph_I2C1, RCC_APB1Periph_I2C2,
\r
1126 * RCC_APB1Periph_USB, RCC_APB1Periph_CAN1, RCC_APB1Periph_BKP,
\r
1127 * RCC_APB1Periph_PWR, RCC_APB1Periph_DAC, RCC_APB1Periph_CEC,
\r
1128 * RCC_APB1Periph_TIM12, RCC_APB1Periph_TIM13, RCC_APB1Periph_TIM14
\r
1129 * @param NewState: new state of the specified peripheral clock.
\r
1130 * This parameter can be: ENABLE or DISABLE.
\r
1133 void RCC_APB1PeriphClockCmd(uint32_t RCC_APB1Periph, FunctionalState NewState)
\r
1135 /* Check the parameters */
\r
1136 assert_param(IS_RCC_APB1_PERIPH(RCC_APB1Periph));
\r
1137 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
1138 if (NewState != DISABLE)
\r
1140 RCC->APB1ENR |= RCC_APB1Periph;
\r
1144 RCC->APB1ENR &= ~RCC_APB1Periph;
\r
1148 #ifdef STM32F10X_CL
\r
1150 * @brief Forces or releases AHB peripheral reset.
\r
1151 * @note This function applies only to STM32 Connectivity line devices.
\r
1152 * @param RCC_AHBPeriph: specifies the AHB peripheral to reset.
\r
1153 * This parameter can be any combination of the following values:
\r
1154 * @arg RCC_AHBPeriph_OTG_FS
\r
1155 * @arg RCC_AHBPeriph_ETH_MAC
\r
1156 * @param NewState: new state of the specified peripheral reset.
\r
1157 * This parameter can be: ENABLE or DISABLE.
\r
1160 void RCC_AHBPeriphResetCmd(uint32_t RCC_AHBPeriph, FunctionalState NewState)
\r
1162 /* Check the parameters */
\r
1163 assert_param(IS_RCC_AHB_PERIPH_RESET(RCC_AHBPeriph));
\r
1164 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
1166 if (NewState != DISABLE)
\r
1168 RCC->AHBRSTR |= RCC_AHBPeriph;
\r
1172 RCC->AHBRSTR &= ~RCC_AHBPeriph;
\r
1175 #endif /* STM32F10X_CL */
\r
1178 * @brief Forces or releases High Speed APB (APB2) peripheral reset.
\r
1179 * @param RCC_APB2Periph: specifies the APB2 peripheral to reset.
\r
1180 * This parameter can be any combination of the following values:
\r
1181 * @arg RCC_APB2Periph_AFIO, RCC_APB2Periph_GPIOA, RCC_APB2Periph_GPIOB,
\r
1182 * RCC_APB2Periph_GPIOC, RCC_APB2Periph_GPIOD, RCC_APB2Periph_GPIOE,
\r
1183 * RCC_APB2Periph_GPIOF, RCC_APB2Periph_GPIOG, RCC_APB2Periph_ADC1,
\r
1184 * RCC_APB2Periph_ADC2, RCC_APB2Periph_TIM1, RCC_APB2Periph_SPI1,
\r
1185 * RCC_APB2Periph_TIM8, RCC_APB2Periph_USART1, RCC_APB2Periph_ADC3,
\r
1186 * RCC_APB2Periph_TIM15, RCC_APB2Periph_TIM16, RCC_APB2Periph_TIM17,
\r
1187 * RCC_APB2Periph_TIM9, RCC_APB2Periph_TIM10, RCC_APB2Periph_TIM11
\r
1188 * @param NewState: new state of the specified peripheral reset.
\r
1189 * This parameter can be: ENABLE or DISABLE.
\r
1192 void RCC_APB2PeriphResetCmd(uint32_t RCC_APB2Periph, FunctionalState NewState)
\r
1194 /* Check the parameters */
\r
1195 assert_param(IS_RCC_APB2_PERIPH(RCC_APB2Periph));
\r
1196 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
1197 if (NewState != DISABLE)
\r
1199 RCC->APB2RSTR |= RCC_APB2Periph;
\r
1203 RCC->APB2RSTR &= ~RCC_APB2Periph;
\r
1208 * @brief Forces or releases Low Speed APB (APB1) peripheral reset.
\r
1209 * @param RCC_APB1Periph: specifies the APB1 peripheral to reset.
\r
1210 * This parameter can be any combination of the following values:
\r
1211 * @arg RCC_APB1Periph_TIM2, RCC_APB1Periph_TIM3, RCC_APB1Periph_TIM4,
\r
1212 * RCC_APB1Periph_TIM5, RCC_APB1Periph_TIM6, RCC_APB1Periph_TIM7,
\r
1213 * RCC_APB1Periph_WWDG, RCC_APB1Periph_SPI2, RCC_APB1Periph_SPI3,
\r
1214 * RCC_APB1Periph_USART2, RCC_APB1Periph_USART3, RCC_APB1Periph_USART4,
\r
1215 * RCC_APB1Periph_USART5, RCC_APB1Periph_I2C1, RCC_APB1Periph_I2C2,
\r
1216 * RCC_APB1Periph_USB, RCC_APB1Periph_CAN1, RCC_APB1Periph_BKP,
\r
1217 * RCC_APB1Periph_PWR, RCC_APB1Periph_DAC, RCC_APB1Periph_CEC,
\r
1218 * RCC_APB1Periph_TIM12, RCC_APB1Periph_TIM13, RCC_APB1Periph_TIM14
\r
1219 * @param NewState: new state of the specified peripheral clock.
\r
1220 * This parameter can be: ENABLE or DISABLE.
\r
1223 void RCC_APB1PeriphResetCmd(uint32_t RCC_APB1Periph, FunctionalState NewState)
\r
1225 /* Check the parameters */
\r
1226 assert_param(IS_RCC_APB1_PERIPH(RCC_APB1Periph));
\r
1227 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
1228 if (NewState != DISABLE)
\r
1230 RCC->APB1RSTR |= RCC_APB1Periph;
\r
1234 RCC->APB1RSTR &= ~RCC_APB1Periph;
\r
1239 * @brief Forces or releases the Backup domain reset.
\r
1240 * @param NewState: new state of the Backup domain reset.
\r
1241 * This parameter can be: ENABLE or DISABLE.
\r
1244 void RCC_BackupResetCmd(FunctionalState NewState)
\r
1246 /* Check the parameters */
\r
1247 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
1248 *(__IO uint32_t *) BDCR_BDRST_BB = (uint32_t)NewState;
\r
1252 * @brief Enables or disables the Clock Security System.
\r
1253 * @param NewState: new state of the Clock Security System..
\r
1254 * This parameter can be: ENABLE or DISABLE.
\r
1257 void RCC_ClockSecuritySystemCmd(FunctionalState NewState)
\r
1259 /* Check the parameters */
\r
1260 assert_param(IS_FUNCTIONAL_STATE(NewState));
\r
1261 *(__IO uint32_t *) CR_CSSON_BB = (uint32_t)NewState;
\r
1265 * @brief Selects the clock source to output on MCO pin.
\r
1266 * @param RCC_MCO: specifies the clock source to output.
\r
1268 * For @b STM32_Connectivity_line_devices, this parameter can be one of the
\r
1269 * following values:
\r
1270 * @arg RCC_MCO_NoClock: No clock selected
\r
1271 * @arg RCC_MCO_SYSCLK: System clock selected
\r
1272 * @arg RCC_MCO_HSI: HSI oscillator clock selected
\r
1273 * @arg RCC_MCO_HSE: HSE oscillator clock selected
\r
1274 * @arg RCC_MCO_PLLCLK_Div2: PLL clock divided by 2 selected
\r
1275 * @arg RCC_MCO_PLL2CLK: PLL2 clock selected
\r
1276 * @arg RCC_MCO_PLL3CLK_Div2: PLL3 clock divided by 2 selected
\r
1277 * @arg RCC_MCO_XT1: External 3-25 MHz oscillator clock selected
\r
1278 * @arg RCC_MCO_PLL3CLK: PLL3 clock selected
\r
1280 * For @b other_STM32_devices, this parameter can be one of the following values:
\r
1281 * @arg RCC_MCO_NoClock: No clock selected
\r
1282 * @arg RCC_MCO_SYSCLK: System clock selected
\r
1283 * @arg RCC_MCO_HSI: HSI oscillator clock selected
\r
1284 * @arg RCC_MCO_HSE: HSE oscillator clock selected
\r
1285 * @arg RCC_MCO_PLLCLK_Div2: PLL clock divided by 2 selected
\r
1289 void RCC_MCOConfig(uint8_t RCC_MCO)
\r
1291 /* Check the parameters */
\r
1292 assert_param(IS_RCC_MCO(RCC_MCO));
\r
1294 /* Perform Byte access to MCO bits to select the MCO source */
\r
1295 *(__IO uint8_t *) CFGR_BYTE4_ADDRESS = RCC_MCO;
\r
1299 * @brief Checks whether the specified RCC flag is set or not.
\r
1300 * @param RCC_FLAG: specifies the flag to check.
\r
1302 * For @b STM32_Connectivity_line_devices, this parameter can be one of the
\r
1303 * following values:
\r
1304 * @arg RCC_FLAG_HSIRDY: HSI oscillator clock ready
\r
1305 * @arg RCC_FLAG_HSERDY: HSE oscillator clock ready
\r
1306 * @arg RCC_FLAG_PLLRDY: PLL clock ready
\r
1307 * @arg RCC_FLAG_PLL2RDY: PLL2 clock ready
\r
1308 * @arg RCC_FLAG_PLL3RDY: PLL3 clock ready
\r
1309 * @arg RCC_FLAG_LSERDY: LSE oscillator clock ready
\r
1310 * @arg RCC_FLAG_LSIRDY: LSI oscillator clock ready
\r
1311 * @arg RCC_FLAG_PINRST: Pin reset
\r
1312 * @arg RCC_FLAG_PORRST: POR/PDR reset
\r
1313 * @arg RCC_FLAG_SFTRST: Software reset
\r
1314 * @arg RCC_FLAG_IWDGRST: Independent Watchdog reset
\r
1315 * @arg RCC_FLAG_WWDGRST: Window Watchdog reset
\r
1316 * @arg RCC_FLAG_LPWRRST: Low Power reset
\r
1318 * For @b other_STM32_devices, this parameter can be one of the following values:
\r
1319 * @arg RCC_FLAG_HSIRDY: HSI oscillator clock ready
\r
1320 * @arg RCC_FLAG_HSERDY: HSE oscillator clock ready
\r
1321 * @arg RCC_FLAG_PLLRDY: PLL clock ready
\r
1322 * @arg RCC_FLAG_LSERDY: LSE oscillator clock ready
\r
1323 * @arg RCC_FLAG_LSIRDY: LSI oscillator clock ready
\r
1324 * @arg RCC_FLAG_PINRST: Pin reset
\r
1325 * @arg RCC_FLAG_PORRST: POR/PDR reset
\r
1326 * @arg RCC_FLAG_SFTRST: Software reset
\r
1327 * @arg RCC_FLAG_IWDGRST: Independent Watchdog reset
\r
1328 * @arg RCC_FLAG_WWDGRST: Window Watchdog reset
\r
1329 * @arg RCC_FLAG_LPWRRST: Low Power reset
\r
1331 * @retval The new state of RCC_FLAG (SET or RESET).
\r
1333 FlagStatus RCC_GetFlagStatus(uint8_t RCC_FLAG)
\r
1336 uint32_t statusreg = 0;
\r
1337 FlagStatus bitstatus = RESET;
\r
1338 /* Check the parameters */
\r
1339 assert_param(IS_RCC_FLAG(RCC_FLAG));
\r
1341 /* Get the RCC register index */
\r
1342 tmp = RCC_FLAG >> 5;
\r
1343 if (tmp == 1) /* The flag to check is in CR register */
\r
1345 statusreg = RCC->CR;
\r
1347 else if (tmp == 2) /* The flag to check is in BDCR register */
\r
1349 statusreg = RCC->BDCR;
\r
1351 else /* The flag to check is in CSR register */
\r
1353 statusreg = RCC->CSR;
\r
1356 /* Get the flag position */
\r
1357 tmp = RCC_FLAG & FLAG_Mask;
\r
1358 if ((statusreg & ((uint32_t)1 << tmp)) != (uint32_t)RESET)
\r
1364 bitstatus = RESET;
\r
1367 /* Return the flag status */
\r
1372 * @brief Clears the RCC reset flags.
\r
1373 * @note The reset flags are: RCC_FLAG_PINRST, RCC_FLAG_PORRST, RCC_FLAG_SFTRST,
\r
1374 * RCC_FLAG_IWDGRST, RCC_FLAG_WWDGRST, RCC_FLAG_LPWRRST
\r
1378 void RCC_ClearFlag(void)
\r
1380 /* Set RMVF bit to clear the reset flags */
\r
1381 RCC->CSR |= CSR_RMVF_Set;
\r
1385 * @brief Checks whether the specified RCC interrupt has occurred or not.
\r
1386 * @param RCC_IT: specifies the RCC interrupt source to check.
\r
1388 * For @b STM32_Connectivity_line_devices, this parameter can be one of the
\r
1389 * following values:
\r
1390 * @arg RCC_IT_LSIRDY: LSI ready interrupt
\r
1391 * @arg RCC_IT_LSERDY: LSE ready interrupt
\r
1392 * @arg RCC_IT_HSIRDY: HSI ready interrupt
\r
1393 * @arg RCC_IT_HSERDY: HSE ready interrupt
\r
1394 * @arg RCC_IT_PLLRDY: PLL ready interrupt
\r
1395 * @arg RCC_IT_PLL2RDY: PLL2 ready interrupt
\r
1396 * @arg RCC_IT_PLL3RDY: PLL3 ready interrupt
\r
1397 * @arg RCC_IT_CSS: Clock Security System interrupt
\r
1399 * For @b other_STM32_devices, this parameter can be one of the following values:
\r
1400 * @arg RCC_IT_LSIRDY: LSI ready interrupt
\r
1401 * @arg RCC_IT_LSERDY: LSE ready interrupt
\r
1402 * @arg RCC_IT_HSIRDY: HSI ready interrupt
\r
1403 * @arg RCC_IT_HSERDY: HSE ready interrupt
\r
1404 * @arg RCC_IT_PLLRDY: PLL ready interrupt
\r
1405 * @arg RCC_IT_CSS: Clock Security System interrupt
\r
1407 * @retval The new state of RCC_IT (SET or RESET).
\r
1409 ITStatus RCC_GetITStatus(uint8_t RCC_IT)
\r
1411 ITStatus bitstatus = RESET;
\r
1412 /* Check the parameters */
\r
1413 assert_param(IS_RCC_GET_IT(RCC_IT));
\r
1415 /* Check the status of the specified RCC interrupt */
\r
1416 if ((RCC->CIR & RCC_IT) != (uint32_t)RESET)
\r
1422 bitstatus = RESET;
\r
1425 /* Return the RCC_IT status */
\r
1430 * @brief Clears the RCC
\92s interrupt pending bits.
\r
1431 * @param RCC_IT: specifies the interrupt pending bit to clear.
\r
1433 * For @b STM32_Connectivity_line_devices, this parameter can be any combination
\r
1434 * of the following values:
\r
1435 * @arg RCC_IT_LSIRDY: LSI ready interrupt
\r
1436 * @arg RCC_IT_LSERDY: LSE ready interrupt
\r
1437 * @arg RCC_IT_HSIRDY: HSI ready interrupt
\r
1438 * @arg RCC_IT_HSERDY: HSE ready interrupt
\r
1439 * @arg RCC_IT_PLLRDY: PLL ready interrupt
\r
1440 * @arg RCC_IT_PLL2RDY: PLL2 ready interrupt
\r
1441 * @arg RCC_IT_PLL3RDY: PLL3 ready interrupt
\r
1442 * @arg RCC_IT_CSS: Clock Security System interrupt
\r
1444 * For @b other_STM32_devices, this parameter can be any combination of the
\r
1445 * following values:
\r
1446 * @arg RCC_IT_LSIRDY: LSI ready interrupt
\r
1447 * @arg RCC_IT_LSERDY: LSE ready interrupt
\r
1448 * @arg RCC_IT_HSIRDY: HSI ready interrupt
\r
1449 * @arg RCC_IT_HSERDY: HSE ready interrupt
\r
1450 * @arg RCC_IT_PLLRDY: PLL ready interrupt
\r
1452 * @arg RCC_IT_CSS: Clock Security System interrupt
\r
1455 void RCC_ClearITPendingBit(uint8_t RCC_IT)
\r
1457 /* Check the parameters */
\r
1458 assert_param(IS_RCC_CLEAR_IT(RCC_IT));
\r
1460 /* Perform Byte access to RCC_CIR[23:16] bits to clear the selected interrupt
\r
1462 *(__IO uint8_t *) CIR_BYTE3_ADDRESS = RCC_IT;
\r
1477 /******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/
\r