初始版本

firmware/stm32-esp/user/drive/bsp_adc.c

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+#include "bsp_adc.h"
+
+void BSP_ADCInit(void)
+{
+	ADC_InitTypeDef  ADC_InitStructure;
+	GPIO_InitTypeDef GPIO_InitStructure;
+	
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);
+	
+    RCC_ADCCLKConfig(RCC_PCLK2_Div6); 
+
+    GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_1;
+    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
+    GPIO_Init(GPIOA,&GPIO_InitStructure);
+
+    ADC_DeInit(ADC1);
+    
+	/* ADC1 configuration ------------------------------------------------------*/
+	ADC_InitStructure.ADC_Mode               = ADC_Mode_Independent;
+	ADC_InitStructure.ADC_ScanConvMode       = DISABLE;
+	ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
+	ADC_InitStructure.ADC_ExternalTrigConv   = ADC_ExternalTrigConv_None;
+	ADC_InitStructure.ADC_DataAlign          = ADC_DataAlign_Right;
+    ADC_InitStructure.ADC_NbrOfChannel       = 1;
+    ADC_Init(ADC1, &ADC_InitStructure);	
+    
+	ADC_Cmd(ADC1, ENABLE);
+	
+	ADC_ResetCalibration(ADC1);
+	while(ADC_GetResetCalibrationStatus(ADC1));
+	ADC_StartCalibration(ADC1);
+	while(ADC_GetCalibrationStatus(ADC1));
+	ADC_SoftwareStartConvCmd(ADC1,ENABLE); 
+}
+
+float ADC_GetSimpleData(void)
+{
+    float SimpleVoltage = 0;
+    uint8_t x = 0;
+	uint32_t total = 0;
+	for( x = 0;x < 5; x++)
+	{
+        // 开启转换,等待DMA传输结束
+        ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5 );
+        ADC_SoftwareStartConvCmd(ADC1, ENABLE);         
+		while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC )){}//等待转换结束
+        total += ADC_GetConversionValue(ADC1);
+        Delay_ms(2);
+    }
+    total = (uint32_t)(total/5);
+    SimpleVoltage = (float)total*3.3/4096.0*2.0;
+    return SimpleVoltage;
+}
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