/**
 * @file stm32_dac_output.c
 * @brief STM32 internal DAC helper for the PA4 analogue output.
 */

#include "stm32_dac_output.h"

#include "main.h"

#define STM32_DAC_MAX_CODE 4095u

void stm32_dac_output_init(void)
{
    GPIO_InitTypeDef gpio_init = {0};

    __HAL_RCC_DAC_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();

    gpio_init.Pin = GPIO_PIN_4;
    gpio_init.Mode = GPIO_MODE_ANALOG;
    gpio_init.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &gpio_init);

    DAC->CR &= ~(DAC_CR_EN1 | DAC_CR_TEN1 | DAC_CR_DMAEN1);
    DAC->DHR12R1 = 0u;
}

void stm32_dac_output_set(uint16_t dac_code, uint8_t enabled)
{
    if (dac_code > STM32_DAC_MAX_CODE)
    {
        dac_code = STM32_DAC_MAX_CODE;
    }

    DAC->DHR12R1 = dac_code;

    if (enabled != 0u)
    {
        DAC->CR |= DAC_CR_EN1;
    }
    else
    {
        DAC->CR &= ~DAC_CR_EN1;
    }
}