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Hi,
I am new to STM32 and I have to do a data acquisition board project using the STM32H7 MCU.
I have the STM32H753XI-EVAL evaluation kit and I am trying out all the features one by one.
I'm currently working on the DAC, which I have configured on CHANNEL2 on PA5. I am trying to start it up, send it a value, and then get its value to check and measure it using a voltmeter on PA5 of CN6 on the evaluation board.
DAC1_Init :
static void MX_DAC1_Init(void)
{
/* USER CODE BEGIN DAC1_Init 0 */
/* USER CODE END DAC1_Init 0 */
DAC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN DAC1_Init 1 */
/* USER CODE END DAC1_Init 1 */
/** DAC Initialization
*/
hdac1.Instance = DAC1;
if (HAL_DAC_Init(&hdac1) != HAL_OK)
{
Error_Handler();
}
/** DAC channel OUT2 config
*/
sConfig.DAC_SampleAndHold = DAC_SAMPLEANDHOLD_DISABLE;
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
sConfig.DAC_ConnectOnChipPeripheral = DAC_CHIPCONNECT_DISABLE;
sConfig.DAC_UserTrimming = DAC_TRIMMING_FACTORY;
if (HAL_DAC_ConfigChannel(&hdac1, &sConfig, DAC_CHANNEL_2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN DAC1_Init 2 */
/* USER CODE END DAC1_Init 2 */
}
DAC MSP
void HAL_DAC_MspInit(DAC_HandleTypeDef* hdac)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hdac->Instance==DAC1)
{
/* USER CODE BEGIN DAC1_MspInit 0 */
/* USER CODE END DAC1_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_DAC12_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**DAC1 GPIO Configuration
PA5 ------> DAC1_OUT2
*/
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN DAC1_MspInit 1 */
/* USER CODE END DAC1_MspInit 1 */
}
}
main
HAL_DAC_Start(&hdac1, DAC_CHANNEL_2);
uint32_t value = 3000;
HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_2, DAC_ALIGN_12B_R, value);
uint32_t dac_val = HAL_DAC_GetValue(&hdac1, DAC_CHANNEL_2);
char buf[50];
int len = snprintf(buf, sizeof(buf), "DAC Set Value: %lu | DAC Get Value: %lu\r\n", value, dac_val);
HAL_UART_Transmit(&huart1, (uint8_t*)buf, len, HAL_MAX_DELAY);
Results :
UART : DAC Set Value: 3000 | DAC Get Value: 3000
Volt : 2.3V No matter what value I set.
Have a great day
