/**
* @brief Initializes the ADCx peripheral according to the specified parameters
* in the ADC_InitStruct.
* @note This function is used to configure the global features of the ADC (
* Resolution, Data Alignment, continuous mode activation, External
* trigger source and edge, Sequence Scan Direction).
* @param ADCx: where x can be 1 to select the ADC peripheral.
* @param ADC_InitStruct: pointer to an ADC_InitTypeDef structure that contains
* the configuration information for the specified ADC peripheral.
* @retval None
*/
void ADC_Init(ADC_TypeDef* ADCx, ADC_InitTypeDef* ADC_InitStruct)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_ADC_ALL_PERIPH(ADCx));
assert_param(IS_ADC_RESOLUTION(ADC_InitStruct->ADC_Resolution));
assert_param(IS_FUNCTIONAL_STATE(ADC_InitStruct->ADC_ContinuousConvMode));
assert_param(IS_ADC_EXT_TRIG_EDGE(ADC_InitStruct->ADC_ExternalTrigConvEdge));
assert_param(IS_ADC_EXTERNAL_TRIG_CONV(ADC_InitStruct->ADC_ExternalTrigConv));
assert_param(IS_ADC_DATA_ALIGN(ADC_InitStruct->ADC_DataAlign));
assert_param(IS_ADC_SCAN_DIRECTION(ADC_InitStruct->ADC_ScanDirection));
/* Get the ADCx CFGR value */
tmpreg = ADCx->CFGR1;
/* Clear SCANDIR, RES[1:0], ALIGN, EXTSEL[2:0], EXTEN[1:0] and CONT bits */
tmpreg &= CFGR1_CLEAR_MASK;
/*---------------------------- ADCx CFGR Configuration ---------------------*/
/* Set RES[1:0] bits according to ADC_Resolution value */
/* Set CONT bit according to ADC_ContinuousConvMode value */
/* Set EXTEN[1:0] bits according to ADC_ExternalTrigConvEdge value */
/* Set EXTSEL[2:0] bits according to ADC_ExternalTrigConv value */
/* Set ALIGN bit according to ADC_DataAlign value */
/* Set SCANDIR bit according to ADC_ScanDirection value */
tmpreg |= (uint32_t)(ADC_InitStruct->ADC_Resolution | ((uint32_t)(ADC_InitStruct->ADC_ContinuousConvMode) << 13) |
ADC_InitStruct->ADC_ExternalTrigConvEdge | ADC_InitStruct->ADC_ExternalTrigConv |
ADC_InitStruct->ADC_DataAlign | ADC_InitStruct->ADC_ScanDirection);
/* Write to ADCx CFGR */
ADCx->CFGR1 = tmpreg;
}
/**
* @brief Initializes the ADCx peripheral according to the specified parameters
* in the ADC_InitStruct and initializes the ADC MSP.
*
* @note This function is used to configure the global features of the ADC (
* ClockPrescaler, Resolution, Data Alignment and number of conversion), however,
* the rest of the configuration parameters are specific to the regular
* channels group (scan mode activation, continuous mode activation,
* External trigger source and edge, DMA continuous request after the
* last transfer and End of conversion selection).
*
* @param hadc: pointer to a ADC_HandleTypeDef structure that contains
* the configuration information for the specified ADC.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_ADC_Init(ADC_HandleTypeDef* hadc)
{
/* Check ADC handle */
if(hadc == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
assert_param(IS_ADC_CLOCKPRESCALER(hadc->Init.ClockPrescaler));
assert_param(IS_ADC_RESOLUTION(hadc->Init.Resolution));
assert_param(IS_FUNCTIONAL_STATE(hadc->Init.ScanConvMode));
assert_param(IS_FUNCTIONAL_STATE(hadc->Init.ContinuousConvMode));
assert_param(IS_ADC_EXT_TRIG(hadc->Init.ExternalTrigConv));
assert_param(IS_ADC_DATA_ALIGN(hadc->Init.DataAlign));
assert_param(IS_ADC_REGULAR_LENGTH(hadc->Init.NbrOfConversion));
assert_param(IS_FUNCTIONAL_STATE(hadc->Init.DMAContinuousRequests));
assert_param(IS_ADC_EOCSelection(hadc->Init.EOCSelection));
assert_param(IS_FUNCTIONAL_STATE(hadc->Init.DiscontinuousConvMode));
if(hadc->Init.ExternalTrigConv != ADC_SOFTWARE_START)
{
assert_param(IS_ADC_EXT_TRIG_EDGE(hadc->Init.ExternalTrigConvEdge));
}
if(hadc->State == HAL_ADC_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hadc->Lock = HAL_UNLOCKED;
/* Init the low level hardware */
HAL_ADC_MspInit(hadc);
}
/* Initialize the ADC state */
hadc->State = HAL_ADC_STATE_BUSY;
/* Set ADC parameters */
ADC_Init(hadc);
/* Set ADC error code to none */
hadc->ErrorCode = HAL_ADC_ERROR_NONE;
/* Initialize the ADC state */
hadc->State = HAL_ADC_STATE_READY;
/* Release Lock */
__HAL_UNLOCK(hadc);
/* Return function status */
return HAL_OK;
}
/**
* @brief Initializes the ADCx peripheral according to the specified parameters
* in the ADC_InitStruct.
* @param ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
* @param ADC_InitStruct: pointer to an ADC_InitTypeDef structure that contains
* the configuration information for the specified ADC peripheral.
* @retval None
*/
void ADC_Init(ADC_TypeDef* ADCx, ADC_InitTypeDef* ADC_InitStruct)
{
uint32_t tmpreg1 = 0;
uint8_t tmpreg2 = 0;
/* Check the parameters */
assert_param(IS_ADC_ALL_PERIPH(ADCx));
assert_param(IS_ADC_RESOLUTION(ADC_InitStruct->ADC_Resolution));
assert_param(IS_FUNCTIONAL_STATE(ADC_InitStruct->ADC_ScanConvMode));
assert_param(IS_FUNCTIONAL_STATE(ADC_InitStruct->ADC_ContinuousConvMode));
assert_param(IS_ADC_EXT_TRIG_EDGE(ADC_InitStruct->ADC_ExternalTrigConvEdge));
assert_param(IS_ADC_EXT_TRIG(ADC_InitStruct->ADC_ExternalTrigConv));
assert_param(IS_ADC_DATA_ALIGN(ADC_InitStruct->ADC_DataAlign));
assert_param(IS_ADC_REGULAR_LENGTH(ADC_InitStruct->ADC_NbrOfConversion));
/*---------------------------- ADCx CR1 Configuration -----------------*/
/* Get the ADCx CR1 value */
tmpreg1 = ADCx->CR1;
/* Clear RES and SCAN bits */
tmpreg1 &= CR1_CLEAR_MASK;
/* Configure ADCx: scan conversion mode and resolution */
/* Set SCAN bit according to ADC_ScanConvMode value */
/* Set RES bit according to ADC_Resolution value */
tmpreg1 |= (uint32_t)(((uint32_t)ADC_InitStruct->ADC_ScanConvMode << 8) | ADC_InitStruct->ADC_Resolution);
/* Write to ADCx CR1 */
ADCx->CR1 = tmpreg1;
/*---------------------------- ADCx CR2 Configuration -----------------*/
/* Get the ADCx CR2 value */
tmpreg1 = ADCx->CR2;
/* Clear CONT, ALIGN, EXTEN and EXTSEL bits */
tmpreg1 &= CR2_CLEAR_MASK;
/* Configure ADCx: external trigger event and edge, data alignment and continuous conversion mode */
/* Set ALIGN bit according to ADC_DataAlign value */
/* Set EXTEN bits according to ADC_ExternalTrigConvEdge value */
/* Set EXTSEL bits according to ADC_ExternalTrigConv value */
/* Set CONT bit according to ADC_ContinuousConvMode value */
tmpreg1 |= (uint32_t)(ADC_InitStruct->ADC_DataAlign | ADC_InitStruct->ADC_ExternalTrigConv |
ADC_InitStruct->ADC_ExternalTrigConvEdge | ((uint32_t)ADC_InitStruct->ADC_ContinuousConvMode << 1));
/* Write to ADCx CR2 */
ADCx->CR2 = tmpreg1;
/*---------------------------- ADCx SQR1 Configuration -----------------*/
/* Get the ADCx SQR1 value */
tmpreg1 = ADCx->SQR1;
/* Clear L bits */
tmpreg1 &= SQR1_L_RSEET;
/* Configure ADCx: regular channel sequence length */
/* Set L bits according to ADC_NbrOfConversion value */
tmpreg2 |= (uint8_t)(ADC_InitStruct->ADC_NbrOfConversion - (uint8_t)1);
tmpreg1 |= ((uint32_t)tmpreg2 << 20);
/* Write to ADCx SQR1 */
ADCx->SQR1 = tmpreg1;
}
