#include "ch.h" #include "hal.h" int main(void) { halInit(); chSysInit(); palSetPadMode(GPIOD, 12, PAL_MODE_OUTPUT_PUSHPULL); while(1) { palSetPad(GPIOD, 12); chThdSleepMilliseconds(100); palClearPad(GPIOD, 12); chThdSleepMilliseconds(50); } }