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#include "batt_adc.h"
extern void Error_Handler(void);
/* Variable containing ADC conversions data */
extern uint16_t aADCxConvertedData[ADC_CONVERTED_DATA_BUFFER_SIZE];
/* ADC handle declaration */
/* ADC channel configuration structure declaration */
ADC_ChannelConfTypeDef sConfig;
void BATT_ADC_Init(void)
{
ADC_HandleTypeDef AdcHandle;
GPIO_InitTypeDef GPIO_InitStruct;
__HAL_RCC_ADC1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Pin = ADCx_CHANNEL_PIN;
HAL_GPIO_Init(ADCx_CHANNEL_GPIO_PORT, &GPIO_InitStruct);
AdcHandle.Instance = ADCx;
if (HAL_ADC_DeInit(&AdcHandle) != HAL_OK)
{
/* ADC de-initialization Error */
Error_Handler();
}
AdcHandle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4; /* Synchronous clock mode, input ADC clock with prscaler 2 */
AdcHandle.Init.Resolution = ADC_RESOLUTION_12B; /* 12-bit resolution for converted data */
AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT; /* Right-alignment for converted data */
AdcHandle.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD; /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
AdcHandle.Init.EOCSelection = ADC_EOC_SINGLE_CONV; /* EOC flag picked-up to indicate conversion end */
AdcHandle.Init.LowPowerAutoPowerOff = DISABLE;
AdcHandle.Init.LowPowerAutoWait = DISABLE; /* Auto-delayed conversion feature disabled */
AdcHandle.Init.ContinuousConvMode = ENABLE; /* Continuous mode enabled (automatic conversion restart after each conversion) */
AdcHandle.Init.DiscontinuousConvMode = DISABLE; /* Parameter discarded because sequencer is disabled */
AdcHandle.Init.ExternalTrigConv = ADC_SOFTWARE_START; /* Software start to trig the 1st conversion manually, without external event */
AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; /* Parameter discarded because software trigger chosen */
AdcHandle.Init.DMAContinuousRequests = ENABLE; /* ADC DMA continuous request to match with DMA circular mode */
AdcHandle.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN; /* DR register is overwritten with the last conversion result in case of overrun */
AdcHandle.Init.SamplingTimeCommon = ADC_SAMPLETIME_239CYCLES_5;
/* Initialize ADC peripheral according to the passed parameters */
if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
{
Error_Handler();
}
/* ### - 2 - Start calibration ############################################ */
if (HAL_ADCEx_Calibration_Start(&AdcHandle) != HAL_OK)
{
Error_Handler();
}
/* ### - 3 - Channel configuration ######################################## */
sConfig.Channel = ADCx_CHANNEL; /* Channel to be converted */
sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* ### - 4 - Start conversion in DMA mode ################################# */
if (HAL_ADC_Start_DMA(&AdcHandle,
(uint32_t *)aADCxConvertedData,
ADC_CONVERTED_DATA_BUFFER_SIZE
) != HAL_OK)
{
Error_Handler();
}
根據(jù)自帶的例子 運(yùn)行之后aADCxConvertedData 這個(gè)adc 的值一直為0 請(qǐng)各位大大看看什么問(wèn)題
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