I am using STM32L432KC-Nucleo board for my project.I am programming DAC channel 1 on PA4 for fixed output voltage. I am employing software trigger mode. With code given below I am not getting any voltage on PA4. On debugging the code I found that DAC_SWTRGR bit 0 is not getting set resulting in DAC_DHR12R1 not getting transferred to DAC_DOR1 RM0394 Page 464. How do you set this bit in HAL Library? (I was unable to find any independent function performing this task )
int main(void)
{
HAL_Init();
SystemClock_Config();
// DACx_FORCE_RESET();
// DACx_RELEASE_RESET();
/*START of Toggle LED program Initialization code*/
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Pin = LED3_PIN;
HAL_GPIO_Init(LED3_GPIO_PORT, &GPIO_InitStruct);
/*Configuring PA4 as DAC_Out1*/
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Mode=GPIO_MODE_ANALOG ;
GPIO_InitStruct.Pull=GPIO_NOPULL;
GPIO_InitStruct.Speed=GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Pin= GPIO_PIN_4;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_GPIO_WritePin(GPIOB, LED3_PIN,GPIO_PIN_SET); // Error Handling
HAL_Delay(100);
/*Configuring of DAC Registers */
__HAL_RCC_DAC1_CLK_ENABLE(); //RCC APB1- DAC Peripheral clock
HAL_DAC_DeInit(&DAC_OUT1);
DAC_OUT1.Instance=DAC1;
DAC_OUT1_NoDMA.DAC_SampleAndHold=DAC_SAMPLEANDHOLD_DISABLE;
//DAC_OUT1_NoDMA.DAC_Trigger=DAC_TRIGGER_NONE;
DAC_OUT1_NoDMA.DAC_Trigger=DAC_TRIGGER_SOFTWARE;
DAC_OUT1_NoDMA.DAC_OutputBuffer=DAC_OUTPUTBUFFER_ENABLE; //DAC output buffered for low impedance loads
//DAC_OUT1_NoDMA.DAC_ConnectOnChipPeripheral=DAC_CHIPCONNECT_DISABLE;
//DAC_OUT1_NoDMA.DAC_UserTrimming=DAC_TRIMMING_FACTORY;
if(HAL_DAC_Init(&DAC_OUT1) != HAL_OK)
{
HAL_GPIO_WritePin(GPIOB, LED3_PIN,GPIO_PIN_RESET); // Error Handling
HAL_Delay(100);
}
if(HAL_DAC_ConfigChannel(&DAC_OUT1, &DAC_OUT1_NoDMA, DAC_CHANNEL_1) != HAL_OK)
{
HAL_GPIO_WritePin(GPIOB, LED3_PIN,GPIO_PIN_RESET); // Error Handling
HAL_Delay(100);
}
if( HAL_DAC_Start(&DAC_OUT1, DAC_CHANNEL_1) != HAL_OK)
{
HAL_GPIO_WritePin(GPIOB, LED3_PIN,GPIO_PIN_RESET); // Error Handling
HAL_Delay(100);
}
if( HAL_DAC_SetValue(&DAC_OUT1, DAC_CHANNEL_1, DAC_ALIGN_12B_R,0xFFF) != HAL_OK)
{
HAL_GPIO_WritePin(GPIOB, LED3_PIN,GPIO_PIN_RESET); // Error Handling
HAL_Delay(100);
}
//SET_BIT(DAC_OUT1->DAC1->SWTRIGR, DAC_SWTRIGR_SWTRIG1);
HAL_Delay(100);
while(1);
}
