kopia lustrzana https://github.com/stlink-org/stlink
89 wiersze
1.8 KiB
C
89 wiersze
1.8 KiB
C
/* missing type */
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typedef unsigned int uint32_t;
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/* boot mode configuration */
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#define CONFIG_BOOT_SRAM 1
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#define CONFIG_BOOT_FLASH 0
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/* hardware configuration */
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#define CONFIG_STM32L_DISCOVERY 1
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#define CONFIG_STM32VL_DISCOVERY 0
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#if CONFIG_STM32VL_DISCOVERY
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# define GPIOC 0x40011000 /* port C */
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# define GPIOC_CRH (GPIOC + 0x04) /* port configuration register high */
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# define GPIOC_ODR (GPIOC + 0x0c) /* port output data register */
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# define LED_BLUE (1 << 8) /* port C, pin 8 */
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# define LED_GREEN (1 << 9) /* port C, pin 9 */
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static inline void setup_leds(void)
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{
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*(volatile uint32_t*)GPIOC_CRH = 0x44444411;
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}
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static inline void switch_leds_on(void)
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{
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*(volatile uint32_t*)GPIOC_ODR = LED_BLUE | LED_GREEN;
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}
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static inline void switch_leds_off(void)
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{
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*(volatile uint32_t*)GPIOC_ODR = 0;
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}
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#elif CONFIG_STM32L_DISCOVERY
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# define GPIOB 0x40020400 /* port B */
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# define GPIOB_MODER (GPIOB + 0x00) /* port mode register */
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# define GPIOB_ODR (GPIOB + 0x14) /* port output data register */
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# define LED_BLUE (1 << 6) /* port B, pin 6 */
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# define LED_GREEN (1 << 7) /* port B, pin 7 */
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static inline void setup_leds(void)
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{
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/* configure port 6 and 7 as output */
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*(volatile uint32_t*)GPIOB_MODER |= (1 << (7 * 2)) | (1 << (6 * 2));
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}
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static inline void switch_leds_on(void)
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{
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*(volatile uint32_t*)GPIOB_ODR = LED_BLUE | LED_GREEN;
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}
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static inline void switch_leds_off(void)
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{
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*(volatile uint32_t*)GPIOB_ODR = 0;
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}
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#endif /* otherwise, error */
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#define delay() \
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do { \
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register unsigned int i; \
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for (i = 0; i < 1000000; ++i) \
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__asm__ __volatile__ ("nop\n\t":::"memory"); \
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} while (0)
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static void __attribute__((naked)) __attribute__((used)) main(void)
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{
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setup_leds();
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while (1)
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{
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switch_leds_on();
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delay();
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switch_leds_off();
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delay();
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}
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}
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