GPIO_SetBits(LED_POWER);

        Delay(50);

        GPIO_ResetBits(LED_POWER);

        Delay(50);

    }

}

// Read temperature and update global temp vars

int16_t temp = 0;

uint8_t temp_frac = 0;

void update_temp() {

    // Assert CS

    GPIO_ResetBits(MAX_CS);

    Delay(1);

    // This may not clock at all... might need to send 16 bits first

    SPI_I2S_SendData(SPI2, 0xAAAA); // send dummy data

    //SPI_I2S_SendData(SPI2, 0xAA); // send dummy data

    uint16_t temp_pre = SPI_I2S_ReceiveData(SPI2);

    if(temp_pre & 0b0000000000000010) {

    }

    else if(temp_pre & 0b0000000000000001) {

    }

    uint8_t sign = temp >> 15;// top bit is sign

    temp_pre = temp_pre >> 2; // Drop 2 lowest bits

    temp_frac = temp_pre & 0b11; // get fractional part

    temp_frac *= 25; // each bit is .25 a degree, up to fixed point

    temp_pre = temp_pre >> 2; // Drop 2 fractional bits 

    if(sign) {

        temp = -temp_pre;

    }

    else {

        temp = temp_pre;

    }

    // Deassert CS

    Delay(1);

    GPIO_SetBits(MAX_CS);

}

int32_t setpoint = 0;

uint16_t k_p = 1;