qmk_firmware_custom/keyboards/handwired/practice60/practice60.c

#include "practice60.h"

#include "ch.h"
#include "hal.h"

#include "underglow.h"
#include "print.h"
#include "debug.h"
#include "util.h"

/* generic STM32F103C8T6 board */
#ifdef BOARD_GENERIC_STM32_F103
#define LED_ON()    do { palClearPad(GPIOC, 13) ;} while (0)
#define LED_OFF()   do { palSetPad(GPIOC, 13); } while (0)
#define LED_TGL()   do { palTogglePad(GPIOC, 13); } while (0)
#endif

void matrix_init_kb(void){
      /* MOSI pin*/
    palSetPadMode(GPIOB, 15, PAL_MODE_STM32_ALTERNATE_PUSHPULL);

    LED_ON();
    palSetPad(GPIOA, 8);
    wait_ms(500);
    palClearPad(GPIOA, 8);
    LED_OFF();

    leds_init();


}