56 lines
1.9 KiB
C
Executable File
56 lines
1.9 KiB
C
Executable File
#include "board.h"
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static volatile uint16_t adc1Ch4Value = 0;
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void adcInit(void)
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{
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ADC_InitTypeDef ADC_InitStructure;
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DMA_InitTypeDef DMA_InitStructure;
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// ADC assumes all the GPIO was already placed in 'AIN' mode
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DMA_DeInit(DMA1_Channel1);
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DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
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DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&adc1Ch4Value;
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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DMA_InitStructure.DMA_BufferSize = 1;
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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DMA_Init(DMA1_Channel1, &DMA_InitStructure);
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/* Enable DMA1 channel1 */
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DMA_Cmd(DMA1_Channel1, ENABLE);
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ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
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ADC_InitStructure.ADC_ScanConvMode = DISABLE;
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ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
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ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
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ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
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ADC_InitStructure.ADC_NbrOfChannel = 1;
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ADC_Init(ADC1, &ADC_InitStructure);
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ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 1, ADC_SampleTime_28Cycles5);
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ADC_DMACmd(ADC1, ENABLE);
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ADC_Cmd(ADC1, ENABLE);
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// Calibrate ADC
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ADC_ResetCalibration(ADC1);
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while(ADC_GetResetCalibrationStatus(ADC1));
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ADC_StartCalibration(ADC1);
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while(ADC_GetCalibrationStatus(ADC1));
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// Fire off ADC
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ADC_SoftwareStartConvCmd(ADC1, ENABLE);
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}
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uint16_t adcGetBattery(void)
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{
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return adc1Ch4Value;
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}
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