32 lines
751 B
C
32 lines
751 B
C
#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/stm32/rcc.h>
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static void clock_setup(void) {
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// Use external 8 MHz HSE and PLL to 72 MHz
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rcc_clock_setup_pll(&rcc_hse_configs[RCC_CLOCK_HSE8_72MHZ]);
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rcc_periph_clock_enable(RCC_GPIOC);
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}
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static void gpio_setup(void) {
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// gpio_mode_setup(GPIOC, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO13);
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gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL,
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GPIO13);
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}
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static void delay(volatile uint32_t count) {
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while (count-- > 0) {
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__asm__("nop");
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}
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}
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int main(void) {
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clock_setup();
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gpio_setup();
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while (1) {
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gpio_toggle(GPIOC, GPIO13); // On Blue Pill: LED is on PC13
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delay(10000000); // Crude delay loop
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}
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return 0;
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}
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