+++ /dev/null
-/* base headers */
-#include "stdint.h"
-
-/* libstm32l_discovery headers */
-#include "stm32l1xx_gpio.h"
-#include "stm32l1xx_adc.h"
-#include "stm32l1xx_dac.h"
-#include "stm32l1xx_lcd.h"
-#include "stm32l1xx_rcc.h"
-#include "stm32l1xx_rtc.h"
-#include "stm32l1xx_exti.h"
-#include "stm32l1xx_pwr.h"
-#include "stm32l1xx_flash.h"
-#include "stm32l1xx_syscfg.h"
-#include "stm32l1xx_dbgmcu.h"
-
-/* board specific macros */
-#include "discover_board.h"
-
-
-/* hardware configuration */
-
-#if CONFIG_STM32VL_DISCOVERY
-
-# define GPIOC 0x40011000 /* port C */
-# define GPIOC_CRH (GPIOC + 0x04) /* port configuration register high */
-# define GPIOC_ODR (GPIOC + 0x0c) /* port output data register */
-
-# define LED_BLUE (1 << 8) /* port C, pin 8 */
-# define LED_GREEN (1 << 9) /* port C, pin 9 */
-
-static inline void setup_leds(void)
-{
- *(volatile uint32_t*)GPIOC_CRH = 0x44444411;
-}
-
-static inline void switch_leds_on(void)
-{
- *(volatile uint32_t*)GPIOC_ODR = LED_BLUE | LED_GREEN;
-}
-
-static inline void switch_leds_off(void)
-{
- *(volatile uint32_t*)GPIOC_ODR = 0;
-}
-
-#elif CONFIG_STM32L_DISCOVERY
-
-# define GPIOB_MODER (GPIOB + 0x00) /* port mode register */
-# define GPIOB_ODR (GPIOB + 0x14) /* port output data register */
-
-# define LED_BLUE (1 << 6) /* port B, pin 6 */
-# define LED_GREEN (1 << 7) /* port B, pin 7 */
-
-static inline void setup_leds(void)
-{
- /* configure port 6 and 7 as output */
- *(volatile uint32_t*)GPIOB_MODER |= (1 << (7 * 2)) | (1 << (6 * 2));
-}
-
-static inline void switch_leds_on(void)
-{
- GPIO_HIGH(LD_GPIO_PORT, LD_GREEN_GPIO_PIN);
- GPIO_HIGH(LD_GPIO_PORT, LD_BLUE_GPIO_PIN);
-}
-
-static inline void switch_leds_off(void)
-{
- GPIO_LOW(LD_GPIO_PORT, LD_GREEN_GPIO_PIN);
- GPIO_LOW(LD_GPIO_PORT, LD_BLUE_GPIO_PIN);
-}
-
-#endif /* otherwise, error */
-
-
-#define delay() \
-do { \
- volatile unsigned int i; \
- for (i = 0; i < 1000000; ++i) \
- __asm__ __volatile__ ("nop\n\t":::"memory"); \
-} while (0)
-
-
-static void RCC_Configuration(void)
-{
- /* HSI is 16mhz RC clock directly fed to SYSCLK (rm00038, figure 9) */
-
- /* enable the HSI clock (high speed internal) */
- RCC_HSICmd(ENABLE);
-
- /* wail til HSI ready */
- while (RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET)
- {}
-
- /* at startup, SYSCLK driven by MSI. set to HSI */
- RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
-
- /* set MSI to 4mhz */
- RCC_MSIRangeConfig(RCC_MSIRange_6);
-
- /* turn HSE off */
- RCC_HSEConfig(RCC_HSE_OFF);
- if (RCC_GetFlagStatus(RCC_FLAG_HSERDY) != RESET)
- {
- while (1) ;
- }
-}
-
-
-static void RTC_Configuration(void)
-{
- /* Allow access to the RTC */
- PWR_RTCAccessCmd(ENABLE);
-
- /* Reset Backup Domain */
- RCC_RTCResetCmd(ENABLE);
- RCC_RTCResetCmd(DISABLE);
-
- /* LSE Enable */
- RCC_LSEConfig(RCC_LSE_ON);
-
- /* Wait till LSE is ready */
- while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
- {}
-
- RCC_RTCCLKCmd(ENABLE);
-
- /* LCD Clock Source Selection */
- RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
-
-}
-
-static void setup_dac1(void)
-{
- /* see 10.2 notes */
-
- static GPIO_InitTypeDef GPIO_InitStructure;
- static DAC_InitTypeDef DAC_InitStructure;
-
- /* DAC clock path:
- HSI (16mhz) -> SYSCLK -> HCLK(/1) -> PCLK1(/1)
- */
-
- /* set the AHB clock (HCLK) prescaler to 1 */
- RCC_HCLKConfig(RCC_SYSCLK_Div1);
-
- /* set the low speed APB clock (APB1, ie. PCLK1) prescaler to 1 */
- RCC_PCLK1Config(RCC_HCLK_Div1);
-
- /* enable DAC APB1 clock */
- /* signal connections: HSI(16mhz) -> SYSCLK -> AHB */
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
-
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; /* GPIO_Pin_5 for channel 2 */
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
- GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- DAC_StructInit(&DAC_InitStructure);
- DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
-#if 0 /* triangle waveform generation */
- DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Triangle;
- DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_1;
-#else
- DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
- DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;
-#endif
- DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
- DAC_Init(DAC_Channel_1, &DAC_InitStructure);
-
- /* enable dac channel */
- DAC_Cmd(DAC_Channel_1, ENABLE);
-}
-
-static inline void set_dac1_mv(unsigned int mv)
-{
- /* mv the millivolts */
-
- /* vref in millivolts */
- /* #define CONFIG_VREF 5000 */
-#define CONFIG_VREF 3000
-
- /* resolution in bits */
-#define CONFIG_DAC_RES 12
-
- const uint16_t n = (mv * (1 << (CONFIG_DAC_RES - 1))) / CONFIG_VREF;
- DAC_SetChannel1Data(DAC_Align_12b_R, n);
-}
-
-void main(void)
-{
- static RCC_ClocksTypeDef RCC_Clocks;
- static GPIO_InitTypeDef GPIO_InitStructure;
- static uint16_t dac_value;
- static unsigned int led_state = 0;
-
- /* Configure Clocks for Application need */
- RCC_Configuration();
-
- /* Configure RTC Clocks */
- RTC_Configuration();
-
-#if 0
- /* Set internal voltage regulator to 1.8v */
- PWR_VoltageScalingConfig(PWR_VoltageScaling_Range1);
- /* Wait Until the Voltage Regulator is ready */
- while (PWR_GetFlagStatus(PWR_FLAG_VOS) != RESET) ;
-#endif
-
- /* configure gpios */
-
- /* Enable GPIOs clock */
- RCC_AHBPeriphClockCmd(LD_GPIO_PORT_CLK, ENABLE);
-
- /* Configure the GPIO_LED pins LD3 & LD4*/
- GPIO_InitStructure.GPIO_Pin = LD_GREEN_GPIO_PIN | LD_BLUE_GPIO_PIN;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
- GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_Init(LD_GPIO_PORT, &GPIO_InitStructure);
- GPIO_LOW(LD_GPIO_PORT, LD_GREEN_GPIO_PIN);
- GPIO_LOW(LD_GPIO_PORT, LD_BLUE_GPIO_PIN);
-
- setup_dac1();
-
- dac_value = 0;
-
- while (1)
- {
- DAC_SetChannel1Data(DAC_Align_12b_R, dac_value & 0xfff);
- dac_value += 0x10;
-
- if (led_state & 1) switch_leds_on();
- else switch_leds_off();
- led_state ^= 1;
-
- delay();
- }
-}
projects / fw / stlink / blobdiff