--- /dev/null
+/* this example is only for stm32l discover.
+ adapted from ST firmwares projects.
+ */
+
+/* base headers */
+#include "stdint.h"
+
+/* libstm32l_discovery headers */
+#include "stm32l1xx_gpio.h"
+#include "stm32l1xx_adc.h"
+#include "stm32l1xx_lcd.h"
+#include "stm32l1xx_rcc.h"
+#include "stm32l1xx_rtc.h"
+#include "stm32l1xx_exti.h"
+#include "stm32l1xx_pwr.h"
+#include "stm32l1xx_syscfg.h"
+#include "stm32l1xx_dbgmcu.h"
+
+/* lcd wrapper routines header */
+#include "stm32l_discovery_lcd.h"
+
+/* boot mode */
+
+#define CONFIG_BOOT_SRAM 1
+#define CONFIG_BOOT_FLASH 0
+
+
+/* gpios
+ refer to CD00277537.pdf, APB memory space.
+ refer to CD00240193.pdf, GPIO.
+*/
+
+#define GPIOA_MODER (GPIOA_BASE + 0x00)
+#define GPIOA_ODR (GPIOA_BASE + 0x14)
+
+#define GPIOB_MODER (GPIOB_BASE + 0x00)
+#define GPIOB_ODR (GPIOB_BASE + 0x14)
+
+#define GPIOC_MODER (GPIOC_BASE + 0x00)
+#define GPIOC_ODR (GPIOC_BASE + 0x14)
+
+
+/* leds */
+
+#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)
+{
+ *(volatile uint32_t*)GPIOB_ODR = LED_BLUE | LED_GREEN;
+}
+
+static inline void switch_leds_off(void)
+{
+ *(volatile uint32_t*)GPIOB_ODR = 0;
+}
+
+
+#define delay() \
+do { \
+ register unsigned int i; \
+ for (i = 0; i < 1000000; ++i) \
+ __asm__ __volatile__ ("nop\n\t":::"memory"); \
+} while (0)
+
+
+#if CONFIG_BOOT_SRAM
+
+extern uint32_t _fstack;
+
+static inline void setup_stack(void)
+{
+ /* setup the stack to point to _fstack (refer to ld script) */
+
+ static const uint32_t fstack = (uint32_t)&_fstack;
+
+ __asm__ __volatile__
+ (
+ "ldr sp, %0\n\t"
+ :
+ : "m"(fstack)
+ : "sp"
+ );
+}
+
+#endif /* CONFIG_BOOT_SRAM */
+
+
+/* application related setup */
+
+static void RCC_Configuration(void)
+{
+ /* Enable HSI Clock */
+ RCC_HSICmd(ENABLE);
+
+ /*!< Wait till HSI is ready */
+ while (RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
+
+ /* Set HSI as sys clock*/
+ RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
+
+ /* Set MSI clock range to ~4.194MHz*/
+ RCC_MSIRangeConfig(RCC_MSIRange_6);
+
+ /* Enable the GPIOs clocks */
+ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC| RCC_AHBPeriph_GPIOD| RCC_AHBPeriph_GPIOE| RCC_AHBPeriph_GPIOH, ENABLE);
+
+ /* Enable comparator, LCD and PWR mngt clocks */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_COMP | RCC_APB1Periph_LCD | RCC_APB1Periph_PWR,ENABLE);
+
+ /* Enable ADC & SYSCFG clocks */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_SYSCFG , ENABLE);
+
+ /* Allow access to the RTC */
+ PWR_RTCAccessCmd(ENABLE);
+
+ /* Reset RTC Backup Domain */
+ RCC_RTCResetCmd(ENABLE);
+ RCC_RTCResetCmd(DISABLE);
+
+ /* LSE Enable */
+ RCC_LSEConfig(RCC_LSE_ON);
+
+ /* Wait until LSE is ready */
+ while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET);
+
+ /* RTC Clock Source Selection */
+ RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
+
+ /* Enable the RTC */
+ RCC_RTCCLKCmd(ENABLE);
+
+ /*Disable HSE*/
+ RCC_HSEConfig(RCC_HSE_OFF);
+ if(RCC_GetFlagStatus(RCC_FLAG_HSERDY) != RESET )
+ {
+ /* Stay in infinite loop if HSE is not disabled*/
+ while(1);
+ }
+}
+
+static void Init_GPIOs(void)
+{
+#if 0 /* fixme: GPIO_Init raises a bug in some gcc toolchains */
+
+ /* GPIO, EXTI and NVIC Init structure declaration */
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+#if 0
+ EXTI_InitTypeDef EXTI_InitStructure;
+ NVIC_InitTypeDef NVIC_InitStructure;
+#endif
+
+#if 0
+ /* Configure User Button pin as input */
+ GPIO_InitStructure.GPIO_Pin = USERBUTTON_GPIO_PIN;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
+ GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
+ GPIO_Init(USERBUTTON_GPIO_PORT, &GPIO_InitStructure);
+#endif
+
+#if 0
+ /* Select User Button pin as input source for EXTI Line */
+ SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA,EXTI_PinSource0);
+
+ /* Configure EXT1 Line 0 in interrupt mode trigged on Rising edge */
+ EXTI_InitStructure.EXTI_Line = EXTI_Line0 ; // PA0 for User button AND IDD_WakeUP
+ EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
+ EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
+ EXTI_InitStructure.EXTI_LineCmd = ENABLE;
+ EXTI_Init(&EXTI_InitStructure);
+
+ /* Enable and set EXTI0 Interrupt to the lowest priority */
+ NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn ;
+ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
+ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
+ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+ NVIC_Init(&NVIC_InitStructure);
+#endif
+
+#if 0
+ /* Configure the LED_pin as output push-pull for LD3 & LD4 usage*/
+ 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);
+
+ /* Force a low level on LEDs*/
+ GPIO_LOW(LD_GPIO_PORT,LD_GREEN_GPIO_PIN);
+ GPIO_LOW(LD_GPIO_PORT,LD_BLUE_GPIO_PIN);
+
+ /* Counter enable: GPIO set in output for enable the counter */
+ GPIO_InitStructure.GPIO_Pin = CTN_CNTEN_GPIO_PIN;
+ GPIO_Init( CTN_GPIO_PORT, &GPIO_InitStructure);
+
+ /* To prepare to start counter */
+ GPIO_HIGH(CTN_GPIO_PORT,CTN_CNTEN_GPIO_PIN);
+
+ /* Configure Port A LCD Output pins as alternate function */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_8 | GPIO_Pin_9 |GPIO_Pin_10 |GPIO_Pin_15;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+ GPIO_Init( GPIOA, &GPIO_InitStructure);
+
+ /* Select LCD alternate function for Port A LCD Output pins */
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource1,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource2,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource3,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource8,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource9,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource10,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource15,GPIO_AF_LCD) ;
+
+ /* Configure Port B LCD Output pins as alternate function */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_8 | GPIO_Pin_9 \
+ | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+ GPIO_Init( GPIOB, &GPIO_InitStructure);
+
+ /* Select LCD alternate function for Port B LCD Output pins */
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource3,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource4,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource5,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource8,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource9,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource10,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource11,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource12,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource13,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource14,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource15,GPIO_AF_LCD) ;
+#endif
+
+#if 0
+ /* Configure Port C LCD Output pins as alternate function */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_6 \
+ | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |GPIO_Pin_11 ;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+ GPIO_Init( GPIOC, &GPIO_InitStructure);
+
+ /* Select LCD alternate function for Port B LCD Output pins */
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource0,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource1,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource2,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource3,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource6,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource7,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource8,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource9,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource10,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource11,GPIO_AF_LCD) ;
+#endif
+
+#if 0
+ /* Configure ADC (IDD_MEASURE) pin as Analogue */
+ GPIO_InitStructure.GPIO_Pin = IDD_MEASURE ;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
+ GPIO_Init( IDD_MEASURE_PORT, &GPIO_InitStructure);
+#endif
+
+#else /* fixme */
+
+ /* set every port in digital output mode */
+
+ /* PA[1:3,8:10,15] */
+ *(volatile uint32_t*)GPIOA_MODER |=
+ (GPIO_Mode_AF << (1 * 2)) |
+ (GPIO_Mode_AF << (2 * 2)) |
+ (GPIO_Mode_AF << (3 * 2)) |
+ (GPIO_Mode_AF << (8 * 2)) |
+ (GPIO_Mode_AF << (9 * 2)) |
+ (GPIO_Mode_AF << (10 * 2)) |
+ (GPIO_Mode_AF << (15 * 2));
+
+ /* PB[3:5,8:15] */
+ *(volatile uint32_t*)GPIOB_MODER |=
+ (GPIO_Mode_AF << (3 * 2)) |
+ (GPIO_Mode_AF << (4 * 2)) |
+ (GPIO_Mode_AF << (5 * 2)) |
+ (GPIO_Mode_AF << (8 * 2)) |
+ (GPIO_Mode_AF << (9 * 2)) |
+ (GPIO_Mode_AF << (10 * 2)) |
+ (GPIO_Mode_AF << (11 * 2)) |
+ (GPIO_Mode_AF << (12 * 2)) |
+ (GPIO_Mode_AF << (13 * 2)) |
+ (GPIO_Mode_AF << (14 * 2)) |
+ (GPIO_Mode_AF << (15 * 2));
+
+ /* PC[0:3,6:11] */
+ *(volatile uint32_t*)GPIOC_MODER |=
+ (GPIO_Mode_AF << (0 * 2)) |
+ (GPIO_Mode_AF << (1 * 2)) |
+ (GPIO_Mode_AF << (2 * 2)) |
+ (GPIO_Mode_AF << (3 * 2)) |
+ (GPIO_Mode_AF << (6 * 2)) |
+ (GPIO_Mode_AF << (7 * 2)) |
+ (GPIO_Mode_AF << (8 * 2)) |
+ (GPIO_Mode_AF << (9 * 2)) |
+ (GPIO_Mode_AF << (10 * 2)) |
+ (GPIO_Mode_AF << (11 * 2));
+
+#endif /* fixme */
+}
+
+
+/* main */
+
+static void __attribute__((naked)) __attribute__((used)) main(void)
+{
+#if CONFIG_BOOT_SRAM
+ /* do not use previsouly setup stack, if any */
+ setup_stack();
+#endif /* CONFIG_BOOT_SRAM */
+
+ RCC_Configuration();
+
+ Init_GPIOs();
+
+ LCD_GLASS_Init();
+
+ setup_leds();
+
+ while (1)
+ {
+ /* switch_leds_on(); */
+ GPIO_HIGH(LD_GPIO_PORT, LD_GREEN_GPIO_PIN);
+ GPIO_HIGH(LD_GPIO_PORT, LD_BLUE_GPIO_PIN);
+
+ LCD_GLASS_Clear();
+ LCD_GLASS_DisplayString("ON ");
+
+ delay();
+
+ /* switch_leds_off(); */
+ GPIO_LOW(LD_GPIO_PORT, LD_GREEN_GPIO_PIN);
+ GPIO_LOW(LD_GPIO_PORT, LD_BLUE_GPIO_PIN);
+
+ LCD_GLASS_Clear();
+ LCD_GLASS_DisplayString(" OFF");
+
+ delay();
+ }
+}
projects / fw / stlink / blobdiff