stm32adc电流采集电路
时间: 2023-10-01 09:08:56 浏览: 199
STM32的ADC模块可以用来进行电流采集。下面是一种常用的电流采集电路:
![adc_current_sensor_circuit.png](https://img-blog.csdn.net/20171129142108920)
电路中使用了一个电阻作为电流传感器,它将被测电路中的电流转化为电压信号。根据欧姆定律,电流I = V/R,其中V是电阻两端的电压,R是电阻的电阻值。
为了提高精度,可以选择一个低漂移的电阻,并且使用一个放大器将电压信号放大到ADC能够采集的范围内。放大器可以使用运算放大器或者差分放大器。
注意,如果要采集的电流较大,可能需要使用多个电阻并联,以减小单个电阻的功率损耗。如果采集的电流较小,可以选择一个高阻值的电阻,但是要注意电阻的温度系数和噪声等指标。
相关问题
stm32adc采集电流程序
以下是一个采集电流的STM32 ADC程序,仅供参考:
```c
#include "stm32f10x.h"
#define ADC1_DR_Address ((u32)0x4001244C)
void ADC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
int main(void) {
GPIO_Configuration();
ADC_Configuration();
NVIC_Configuration();
ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
while (ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while (ADC_GetCalibrationStatus(ADC1));
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
while (1) {
/* 采集电流值 */
if (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC)) {
u16 adcValue = ADC_GetConversionValue(ADC1);
/* 处理采集到的电流值 */
}
}
}
void ADC_Configuration(void) {
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&adcValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
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);
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
ADC_DMACmd(ADC1, ENABLE);
}
void GPIO_Configuration(void) {
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void NVIC_Configuration(void) {
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void ADC1_2_IRQHandler(void) {
if (ADC_GetITStatus(ADC1, ADC_IT_EOC) != RESET) {
ADC_ClearITPendingBit(ADC1, ADC_IT_EOC);
}
}
```
需要注意的是,上述程序仅供参考,具体实现需要根据具体的硬件电路、采样率、采样精度等参数进行配置。同时,需要根据具体的需求进行数据处理和显示,如通过串口通信将采集的数据发送到上位机进行显示等。
stm32adc采集步进电机电流程序
以下是一个采集步进电机电流的STM32 ADC程序,仅供参考:
```c
#include "stm32f10x.h"
#define ADC1_DR_Address ((u32)0x4001244C)
void ADC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
int main(void) {
GPIO_Configuration();
ADC_Configuration();
NVIC_Configuration();
ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
while (ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while (ADC_GetCalibrationStatus(ADC1));
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
while (1) {
/* 采集步进电机电流值 */
if (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC)) {
u16 adcValue = ADC_GetConversionValue(ADC1);
/* 处理采集到的步进电机电流值 */
}
}
}
void ADC_Configuration(void) {
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&adcValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
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);
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
ADC_DMACmd(ADC1, ENABLE);
}
void GPIO_Configuration(void) {
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void NVIC_Configuration(void) {
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void ADC1_2_IRQHandler(void) {
if (ADC_GetITStatus(ADC1, ADC_IT_EOC) != RESET) {
ADC_ClearITPendingBit(ADC1, ADC_IT_EOC);
}
}
```
需要注意的是,上述程序仅供参考,具体实现需要根据具体的硬件电路、采样率、采样精度等参数进行配置。同时,需要根据具体的需求进行数据处理和显示,如通过串口通信将采集的数据发送到上位机进行显示等。同时,需要在程序中加入步进电机控制代码,以便控制步进电机的运动。
阅读全文