122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
#include "adc.h"
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#include "stm32l1xx_adc.h"
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#include "bsp.h"
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//PB0-ADC8,PB1-ADC9
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__IO uint16_t VREFINT_CAL;
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__IO uint16_t VREFINT_DATA;
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__IO float VDDA_VAL;
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void ADC15_Init(void)
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{
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ADC_CommonInitTypeDef ADC_CommonInitStructure;
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GPIO_InitTypeDef GPIO_InitStructure;
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ADC_InitTypeDef ADC_InitStructure;
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/*----------------- ADC1 configuration with DMA enabled --------------------*/
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/* Enable the HSI oscillator */
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RCC_HSICmd(ENABLE);
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ADC_CommonInitStructure.ADC_Prescaler=ADC_Prescaler_Div4;
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ADC_CommonInit(&ADC_CommonInitStructure);
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/* Enable GPIOB clock */
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
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/* Configure PB.14 (ADC Channe20) in analog mode */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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/* Check that HSI oscillator is ready */
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while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
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/* Enable ADC1 clock */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
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/* ADC1 configuration */
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ADC_InitStructure.ADC_ScanConvMode = DISABLE;
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ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
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ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConvEdge_None;
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ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
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// ADC_InitStructure.ADC_Resolution=ADC_Resolution_12b;//12位
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ADC_InitStructure.ADC_NbrOfConversion = 1;
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ADC_Init(ADC1, &ADC_InitStructure);
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ADC_TempSensorVrefintCmd(ENABLE);//内部通道17使能
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ADC_Cmd(ADC1, ENABLE);
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VREFINT_CAL = *(__IO uint16_t *)(0X1FF800F8);
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}
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//获得ADC值
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//ch:通道值 0~3
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u16 Get_Adc(u8 ch)
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{
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PWR_CTRLADC_H;//打开ADC电源
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//设置指定ADC的规则组通道，一个序列，采样时间
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ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_384Cycles ); //ADC1,ADC通道
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ADC_SoftwareStartConv(ADC1); //使能指定的ADC1的软件转换启动功能
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while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));//等待转换结束
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return ADC_GetConversionValue(ADC1); //返回最近一次ADC1规则组的转换结果
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}
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//读取带参考电压的ADC值
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float Get_Adc_Ref(u8 ch)
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{
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float ADC_V;
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u16 adc_ch;
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PWR_CTRLADC_H;//打开ADC电源
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// Get_Adc(ch);
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VREFINT_DATA=Get_Adc(17);
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adc_ch=Get_Adc(ch);
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VDDA_VAL=(float)3*VREFINT_CAL/VREFINT_DATA;//获取VDDA电压
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ADC_V=((float)adc_ch/4095)*VDDA_VAL;
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return ADC_V;
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}
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float Get_Adc_Average(u8 ch,u8 times)
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{
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float temp_val=0;
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u8 t;
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for(t=0;t<times;t++)
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{
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//temp_val+=Get_Adc_Ref(ch);
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temp_val+=Get_Adc(ch);
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delay_ms(10);
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}
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temp_val=((temp_val/times)/4095)*3.35;
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return temp_val;
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//return ((temp_val/times));
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}
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void ADC15_POWERON(void)
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{
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PWR_CTRLADC_H;
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};
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void ADC15_POWEROFF(void)
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{
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PWR_CTRLADC_L;
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};
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void ADC15_Process(void)
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{
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float ADC_VALUVE;
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ADC_VALUVE=Get_Adc_Average(15,10);
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delay_ms(500);
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ADC_VALUVE=Get_Adc_Average(15,10);
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ADC_VALUVE*=(float)4.2;
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sprintf(data_common1.ADC_DATA,"%.3f,",ADC_VALUVE);
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}
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