STM32 数字电压表 LM317 可调电源

R2 我这次用的是10K 的 电压规模是能够从0 开端的 而公式是Vo＝1.25（1＋R2/R1） 。感觉这是由于只要给ADJ一个参阅电压便能够使LM317有值输出的。确保R1≥0.83KΩ，R2≤23.74KΩ 便可保持一个最小作业电流，当317稳压块的输出电流小于其最小安稳作业电流时，317稳压块就不能正常作业最小安稳作业电流的值一般为1.5mA。

#include “stm32f10x.h”
#include “HAL.H”

#define ADC1_DR_Address ((uint32_t)0x4001244C)
/* Private variables ———————————————————*/
DMA_InitTypeDef DMA_InitStructure;
u16 ADCConvertedValue[16];
volatile bool ADC_Ok;
void ADC_Configuration()
{

ADC_InitTypeDef ADC_InitStructure;

/* ADCCLK = PCLK2/4 */
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
/* Enable DMA1 clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Enable ADC1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 , ENABLE);
/* DMA1 channel1 configuration ———————————————-*/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 16;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;//一般形式 完结后就会中止
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);

DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);//DMA通道1传输完结中止
/* Enable DMA1 channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);

/* ADC1 configuration ——————————————————*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);

/* ADC1 regular channel14 configuration 就是PC4脚 为模拟量输入 留意下边转化周期距离 周期越长 输入ADC的阻抗越大，最大239的话大约370KΩ 而最小的周期时只要 1KΩ多，输入阻抗太小在后边的分压电路变欠好规划了，这点要留意*/
ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 1, ADC_SampleTime_239Cycles5);

/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);

/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);

/* Enable ADC1 reset calibaration register 下边进行校准ADC*/
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));

/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));

/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);

}

/**************************************************************
** 函数名:ADC_DigitFilter
** 功用:软件滤波
** 留意事项:取NO的2/5作为头尾疏忽值,留意N要大于5,不然不会去头尾
***************************************************************/
u16 ADC_DigitFilter(u16* buf,u8 no)
{
u8 i,j;
u16 tmp;
u8 cut_no=0;
//冒泡法排序
for(i=0;i{
for(j=0;j{

if(buf[j]>buf[j+1])
{
/*tmp=buf[j];
buf[j]=buf[j+1];
buf[j+1]=tmp;*/
buf[j]=buf[j]^buf[j+1];
buf[j+1]=buf[j]^buf[j+1];
buf[j]=buf[j]^buf[j+1];
}
}
}
if(no>5)
{
cut_no=no/5;
}

//求均匀
tmp=0;
for(i=cut_no;itmp+=buf[i];
return(tmp/(no-2*cut_no));
}

//从头答应DMA,
void DMAReConfig(void)
{
DMA_DeInit(DMA1_Channel1);
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
DMA_Cmd(DMA1_Channel1, ENABLE);
}