acs712模块stm32代码

以下是使用STM32控制ACS712电流传感器模块的代码示例：

#include "stm32f4xx.h"
#include "stdio.h"

#define ADC1_DR_ADDRESS ((uint32_t)0x4001204C)

__IO uint16_t ADCConvertedValue = 0;
__IO uint32_t ADCValue = 0;
float current = 0;

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
  
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
}

void ADC_Configuration(void)
{
    ADC_InitTypeDef ADC_InitStructure;
    ADC_CommonInitTypeDef ADC_CommonInitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

    ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
    ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
    ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
    ADC_CommonInit(&ADC_CommonInitStructure);

    ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfConversion = 1;
    ADC_Init(ADC1, &ADC_InitStructure);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_144Cycles);

    ADC_Cmd(ADC1, ENABLE);

    ADC_SoftwareStartConv(ADC1);
}

void USART_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USART2, &USART_InitStructure);

    USART_Cmd(USART2, ENABLE);
}

void USART_SendChar(char c)
{
    while (USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);
    USART_SendData(USART2, c);
}

int fputc(int ch, FILE *f)
{
    USART_SendChar(ch);
    return ch;
}

int main(void)
{
    GPIO_Configuration();
    ADC_Configuration();
    USART_Configuration();

    while (1)
    {
        ADCValue = 0;
        for (int i = 0; i < 10; i++)
        {
            ADC_SoftwareStartConv(ADC1);
            while (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);
            ADCConvertedValue = ADC_GetConversionValue(ADC1);
            ADCValue += ADCConvertedValue;
        }

        ADCValue /= 10;

        current = (float)(ADCValue - 2048) / 4096 * 5 / 0.185;

        printf("Current: %.2fA\n", current);

        delay_ms(100);
    }
}

void delay_ms(uint32_t nTime)
{
    uint32_t TimingDelay = 0;
    TimingDelay = nTime;
    while(TimingDelay !=0)
    {
        TimingDelay--;
    }
}

该代码读取ADC通道10上的值，并将其转换为电流值。然后，使用USART2将电流值发送到PC。请注意，此代码的串口波特率为115200。您可以根据需要进行更改。