SPI bitbang driver

spi_bitbang.c

#include "stdint.h"

/* ************************************************************************** */

#define set_STROBE_PIN(state) LATXbits.LATXY = state // your register here
#define set_CLOCK_PIN(state) LATXbits.LATXY = state // your register here
#define set_DATA_PIN(state) LATXbits.LATXY = state // your register here


static void spi_bitbang_tx_word(uint16_t word) {
    set_STROBE_PIN(1);
    set_CLOCK_PIN(0);

    for (uint8_t i = 0; i < 16; i++) {
        if (word & (1 << (15 - i))) {
            set_DATA_PIN(1);
        } else {
            set_DATA_PIN(0);
        }
        delay_us(10);
        set_CLOCK_PIN(1);
        delay_us(10);
        set_CLOCK_PIN(0);
        delay_us(10);
    }
    set_STROBE_PIN(0);
    delay_us(10);
    set_STROBE_PIN(1);
    delay_us(10);
}