/**
* @brief Configures the discontinuous mode for the selected ADC regular
* group channel.
* @param ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
* @param Number: specifies the discontinuous mode regular channel
* count value. This number must be between 1 and 8.
* @retval None
*/
void ADC_DiscModeChannelCountConfig(ADC_TypeDef* ADCx, uint8_t Number)
{
uint32_t tmpreg1 = 0;
uint32_t tmpreg2 = 0;
/* Check the parameters */
assert_param(IS_ADC_ALL_PERIPH(ADCx));
assert_param(IS_ADC_REGULAR_DISC_NUMBER(Number));
/* Get the old register value */
tmpreg1 = ADCx->CR1;
/* Clear the old discontinuous mode channel count */
tmpreg1 &= CR1_DISCNUM_Reset;
/* Set the discontinuous mode channel count */
tmpreg2 = Number - 1;
tmpreg1 |= tmpreg2 << 13;
/* Store the new register value */
ADCx->CR1 = tmpreg1;
}
/*******************************************************************************
* 函数名称: ADC_DiscModeChannelCountConfig
* 功能描述: 配置选中的ADC常规组为非连续模式.
* 输入参数: (1)ADCx:其中x可以是1、2或3，用来选择ADC外围模块.
* (2)Number:非连续模式下常规信道计数值。该值范围为1－8。
* 输出参数: 无
* 返回参数: 无
*******************************************************************************/
void ADC_DiscModeChannelCountConfig(ADC_TypeDef* ADCx, u8 Number)
{
u32 tmpreg1 = 0;
u32 tmpreg2 = 0;
/* Check the parameters [检查参数] */
assert_param(IS_ADC_ALL_PERIPH(ADCx));
assert_param(IS_ADC_REGULAR_DISC_NUMBER(Number));
/* Get the old register value [取得过去的寄存器值]*/
tmpreg1 = ADCx->CR1;
/* Clear the old discontinuous mode channel count [清除过去的不间断模式通道计数器]*/
tmpreg1 &= CR1_DISCNUM_Reset;
/* Set the discontinuous mode channel count [设置不间断模式通道计数器]*/
tmpreg2 = Number - 1;
tmpreg1 |= tmpreg2 << 13;
/* Store the new register value [存储新的寄存器值]*/
ADCx->CR1 = tmpreg1;
}
/**
* @brief Initializes the ADCx peripheral according to the specified parameters
* in the ADC_InitStruct without initializing the ADC MSP.
* @param hadc: pointer to a ADC_HandleTypeDef structure that contains
* the configuration information for the specified ADC.
* @retval None
*/
static void ADC_Init(ADC_HandleTypeDef* hadc)
{
/* Set ADC parameters */
/* Set the ADC clock prescaler */
ADC->CCR &= ~(ADC_CCR_ADCPRE);
ADC->CCR |= hadc->Init.ClockPrescaler;
/* Set ADC scan mode */
hadc->Instance->CR1 &= ~(ADC_CR1_SCAN);
hadc->Instance->CR1 |= ADC_CR1_SCANCONV(hadc->Init.ScanConvMode);
/* Set ADC resolution */
hadc->Instance->CR1 &= ~(ADC_CR1_RES);
hadc->Instance->CR1 |= hadc->Init.Resolution;
/* Set ADC data alignment */
hadc->Instance->CR2 &= ~(ADC_CR2_ALIGN);
hadc->Instance->CR2 |= hadc->Init.DataAlign;
/* Enable external trigger if trigger selection is different of software */
/* start. */
/* Note: This configuration keeps the hardware feature of parameter */
/* ExternalTrigConvEdge "trigger edge none" equivalent to */
/* software start. */
if(hadc->Init.ExternalTrigConv != ADC_SOFTWARE_START)
{
/* Select external trigger to start conversion */
hadc->Instance->CR2 &= ~(ADC_CR2_EXTSEL);
hadc->Instance->CR2 |= hadc->Init.ExternalTrigConv;
/* Select external trigger polarity */
hadc->Instance->CR2 &= ~(ADC_CR2_EXTEN);
hadc->Instance->CR2 |= hadc->Init.ExternalTrigConvEdge;
}
else
{
/* Reset the external trigger */
hadc->Instance->CR2 &= ~(ADC_CR2_EXTSEL);
hadc->Instance->CR2 &= ~(ADC_CR2_EXTEN);
}
/* Enable or disable ADC continuous conversion mode */
hadc->Instance->CR2 &= ~(ADC_CR2_CONT);
hadc->Instance->CR2 |= ADC_CR2_CONTINUOUS(hadc->Init.ContinuousConvMode);
if(hadc->Init.DiscontinuousConvMode != DISABLE)
{
assert_param(IS_ADC_REGULAR_DISC_NUMBER(hadc->Init.NbrOfDiscConversion));
/* Enable the selected ADC regular discontinuous mode */
hadc->Instance->CR1 |= (uint32_t)ADC_CR1_DISCEN;
/* Set the number of channels to be converted in discontinuous mode */
hadc->Instance->CR1 &= ~(ADC_CR1_DISCNUM);
hadc->Instance->CR1 |= ADC_CR1_DISCONTINUOUS(hadc->Init.NbrOfDiscConversion);
}
else
{
/* Disable the selected ADC regular discontinuous mode */
hadc->Instance->CR1 &= ~(ADC_CR1_DISCEN);
}
/* Set ADC number of conversion */
hadc->Instance->SQR1 &= ~(ADC_SQR1_L);
hadc->Instance->SQR1 |= ADC_SQR1(hadc->Init.NbrOfConversion);
/* Enable or disable ADC DMA continuous request */
hadc->Instance->CR2 &= ~(ADC_CR2_DDS);
hadc->Instance->CR2 |= ADC_CR2_DMAContReq(hadc->Init.DMAContinuousRequests);
/* Enable or disable ADC end of conversion selection */
hadc->Instance->CR2 &= ~(ADC_CR2_EOCS);
hadc->Instance->CR2 |= ADC_CR2_EOCSelection(hadc->Init.EOCSelection);
}