40 lines
634 B
C
40 lines
634 B
C
/* based on example from https://github.com/satoshinm/pill_blink */
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#include "bluepill.h"
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#define LED_PIN 13
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static inline void
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delay(unsigned long ms)
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{
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for (unsigned long i = 0; i < ms; ++i) __asm__("nop");
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}
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static inline void
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led_off() {
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clear_pin(GPIO_C, LED_PIN);
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}
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static inline void
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led_on() {
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set_pin(GPIO_C, LED_PIN);
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}
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int
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main(void)
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{
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*RCC |= (1 << 4); /* enable port C clock */
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output_mode(GPIO_C, LED_PIN, OUTPUT_GPP, OUTPUT_MAX_2MHZ);
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while(1) {
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led_off();
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delay(1000000);
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led_on();
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delay(100000);
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led_off();
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delay(100000);
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led_on();
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delay(100000);
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}
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}
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