script file

uint8_t *txbuf;
uint8_t *rxbuf;

int pin = 0;

void setup(void){
    static uint8_t _txbuf[8] __attribute__ ((section (".sram2")));
    static uint8_t _rxbuf[8] __attribute__ ((section (".sram2")));
    txbuf = _txbuf;
    rxbuf = _rxbuf;

    palSetPadMode(GPIOA,2,PAL_MODE_OUTPUT_PUSHPULL);
    palWritePad(GPIOA,2,1);
    palSetPadMode(GPIOA,3,PAL_MODE_OUTPUT_PUSHPULL);
    palWritePad(GPIOA,3,1);
}

void loop(void){


    txbuf[2] = 0b00000000;

        for(int pin=0; pin<8; pin++){

            txbuf[0] = pin < 4 ? 0b01100000 : 0b11100000;

            if (pin % 4 == 0) { // pin == 0 || pin == 4
                txbuf[1] = 0b00000000;
            } else if (pin % 4 == 1) { // pin == 1 || pin == 5
                txbuf[1] = 0b00000010;
            } else if (pin % 4 == 2) { // pin == 2 || pin == 6
                txbuf[1] = 0b00000001;
            } else {
                txbuf[1] = 0b00000011;
            }




        palWritePad(GPIOA,3,0);
        spiSelect(&SPID1);      // START SPI
        spiSend(&SPID1,3,txbuf);
        spiReceive(&SPID1,3,rxbuf);
        spiUnselect(&SPID1);
        palWritePad(GPIOA,3,1);


        int z = (rxbuf[1] << 8| rxbuf[0]) << 16;



        if (pin == 0){
            cv1 = z;
        }
        else if (pin == 1){
            cv2 = z;
        }
        else if (pin == 2){
            cv3 = z;
        }
        else if (pin == 3){
            cv4 = z;
        }
        else if (pin == 4){
            cv5 = z;
        }
        else if (pin == 5){
            cv6 = z;
        }
        else if (pin == 6){
            cv7 = z;
        }
        else if (pin == 7){
            cv8 = z;
        }

        chThdSleepMilliseconds(1);

        }

        txbuf[2] = 0b00000000;

        for(int pin=0; pin<8; pin++){

            txbuf[0] = pin < 4 ? 0b01100000 : 0b11100000;

            if (pin % 4 == 0) { // pin == 0 || pin == 4
                txbuf[1] = 0b00000000;
            } else if (pin % 4 == 1) { // pin == 1 || pin == 5
                txbuf[1] = 0b00000010;
            } else if (pin % 4 == 2) { // pin == 2 || pin == 6
                txbuf[1] = 0b00000001;
            } else {
                txbuf[1] = 0b00000011;
            }




        palWritePad(GPIOA,2,0);
        spiSelect(&SPID1);      // START SPI
        spiSend(&SPID1,3,txbuf);
        spiReceive(&SPID1,3,rxbuf);
        spiUnselect(&SPID1);
        palWritePad(GPIOA,2,1);


        int z = 0x07FFFFFF - ((rxbuf[1] << 8| rxbuf[0]) << 16);


        if (pin == 0){
            pot1 = z;
        }
        else if (pin == 1){
            pot2 = z;
        }
        else if (pin == 2){
            pot3 = z;
        }
        else if (pin == 3){
            pot4 = z;
        }
        else if (pin == 4){
            pot5 = z;
        }
        else if (pin == 5){
            pot6 = z;
        }
        else if (pin == 6){
            pot7 = z;
        }
        else if (pin == 7){
            pot8 = z;
        }

        chThdSleepMilliseconds(1);
        }

}