最近买了一个单向交流计量模块(https://download.csdn.net/download/weixin_43205178/11472943)![在这里插入图片描述]
这个模块实现通过自带的电脑串口通信，显示在限免如下形式 
艾锐达公司出品的计量模块！淘宝客服只提供一个资料，之前也没写过接口函数，在几年前接受叶老师的指导接口出来了。感谢老师！
特地把程序贴出来！！！
```c
#include “delay.h”
#include “usart3.h”
#include “stdarg.h”
#include “usart.h”
#include “stdio.h”
#include “string.h”
#include “WIFI8266.h”
#include “led.h”
#include “usart3.h”
u8 USART3_RX_BUF[USART3_MAX_RECV_LEN];
u8 USART3_TX_BUF[USART3_MAX_SEND_LEN];
unsigned char Read_ID = 0x01;
unsigned char Tx_Buffer1[8];
unsigned char Rx_Buffer1[40];
unsigned char Rx_Buffer[40];
int receive_finished;
unsigned long Voltage_data, Current_data, Power_data, Energy_data, Pf_data, CO2_data, HZ;
int i = 8; //此次发送数据的长度
int j = 0;
float Pf_data1, HZ1;
int read_enable = 0;
int reveive_numbe = 0;
vu16 USART3_RX_STA = 0;
//中断服务函数 之前找用串口发送数据的程序自己带的函数
void USART3_IRQHandler(void)
{
char Res;
if (USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
{
USART_ClearITPendingBit(USART3, USART_IT_RXNE);
Res = USART_ReceiveData(USART3);
if (USART3_RX_STA < USART3_MAX_RECV_LEN) //接收的字符串
{
Rx_Buffer1[USART3_RX_STA] = Res;
USART3_RX_STA++;
}
}
if (USART_GetITStatus(USART3, USART_IT_IDLE) != SET)
{
receive_finished = 1; // 这个自动的发送的重点啊 这个IF利用的是空闲中断，在收完数据后自动发送
USART_ClearITPendingBit(USART3, USART_IT_IDLE);
}
USART3->SR;
USART3->DR;
}
//这个是计算CRC函数 买模块自身资料带的函数
unsigned int calccrc(unsigned char crcbuf, unsigned int crc)
{
unsigned char i;
unsigned char chk;
crc = crc ^ crcbuf; for (i = 0; i < 8; i++)
{
chk = (unsigned char)(crc & 1);
crc = crc >> 1;
crc = crc & 0x7fff;
if (chk == 1) crc = crc ^ 0xa001;
crc = crc & 0xffff;
}
return crc;
}
//这个是核对CRC校验函数 买模块自身资料带的函数 不用看
unsigned int chkcrc(unsigned char* buf, unsigned char len)
{
unsigned char hi, lo;
unsigned int i;
unsigned int crc;
crc = 0xFFFF;
for (i = 0; i < len; i++)
{
crc = calccrc(*buf, crc);
buf++;
}
hi = (unsigned char)(crc % 256);
lo = (unsigned char)(crc / 256);
crc = (((unsigned int)(hi)) << 8) | lo;
return crc;
}
//读电能模块的函数 买模块自身资料带的函数 重点看for循环
void read_data(void)
{
union crcdata
{
unsigned int word16;
unsigned char byte[2];
}crcnow;
if (read_enable == 1) // 到时间抄读模块，抄读间隔 1 秒钟(或其他)
{
read_enable = 0;
Tx_Buffer1[0] = Read_ID; //模块的 ID 号，默认 ID 为 0x01
Tx_Buffer1[1] = 0x03;
Tx_Buffer1[2] = 0x00;
Tx_Buffer1[3] = 0x48;
Tx_Buffer1[4] = 0x00;
Tx_Buffer1[5] = 0x08;
crcnow.word16 = chkcrc(Tx_Buffer1, 6);
Tx_Buffer1[6] = crcnow.byte[1]; //CRC 效验低字节在前
Tx_Buffer1[7] = crcnow.byte[0];
}
for (j = 0; j < i; j++) //循环发送数据01 03 00 48 00 08 C4 1A
{
while (USART_GetFlagStatus(USART3, USART_FLAG_TC) == RESET); //串口三 循环发送,直到发送完毕
USART_SendData(USART3, Tx_Buffer1[j]);
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET); //循环发送,直到发送完毕
USART_SendData(USART1, Tx_Buffer1[j]); //用 串口一 来检测是否发送的一样
// Send_data(8); //发送 8 个数据，请根据单片机类型自己编程
}
}
//这个也是买模块自己带的资料 为解析数据 我们可以利用串口来打印出显示的数据
void Analysis_data(void)
{
unsigned char i;
union crcdata
{
unsigned int word16;
unsigned char byte[2];
}crcnow;
if (receive_finished == 1) //接收完成
{
printf("\r\nreceive_finished标志位为1\r\n");
reveive_numbe = USART3_RX_STA; //这个也是好像写的
receive_finished = 0;
if ((Rx_Buffer1[0] == 0x01) || (Rx_Buffer1[0] == 0x00)) //确认 ID 正确
{
printf("\r\n确认 ID 正确\r\n");//串口一来打印接受电压值
crcnow.word16 = chkcrc(Rx_Buffer1, reveive_numbe - 2); //reveive_numbe 是接收数据总长度
if ((crcnow.byte[0] == Rx_Buffer1[reveive_numbe - 1]) && (crcnow.byte[1] == Rx_Buffer1[reveive_numbe - 2]))//确认 CRC 校验正确
{
printf("\r\n%d\r\n", USART3_RX_STA); //这个是自己加的，，下面的是资料自己带的
Voltage_data = (((unsigned long)(Rx_Buffer1[3])) << 24) | (((unsigned long)(Rx_Buffer1[4])) << 16) | (((unsigned long)(Rx_Buffer1[5])) << 8) | Rx_Buffer1[6];
printf("\r\n电压值:%lu\r\n", Voltage_data);//串口一来打印电压值 自己加的
Current_data = (((unsigned long)(Rx_Buffer1[7])) << 24) | (((unsigned long)(Rx_Buffer1[8])) << 16) | (((unsigned long)(Rx_Buffer1[9])) << 8) | Rx_Buffer1[10];
printf("电流:%lu\r\n", Current_data);//串口一来打印电流
Power_data = (((unsigned long)(Rx_Buffer1[11])) << 24) | (((unsigned long)(Rx_Buffer1[12])) << 16) | (((unsigned long)(Rx_Buffer1[13])) << 8) | Rx_Buffer1[14];
printf("功率:%lu\r\n", Power_data);//串口一来打印功率
Energy_data = (((unsigned long)(Rx_Buffer1[15])) << 24) | (((unsigned long)(Rx_Buffer1[16])) << 16) | (((unsigned long)(Rx_Buffer1[17])) << 8) | Rx_Buffer1[18];
printf("电能:%lu\r\n", Energy_data);//串口一来打印电能
Pf_data = (((unsigned long)(Rx_Buffer1[19])) << 24) | (((unsigned long)(Rx_Buffer1[20])) << 16) | (((unsigned long)(Rx_Buffer1[21])) << 8) | Rx_Buffer1[22];
Pf_data1 = (float)(Pf_data * 0.001);
printf("功率因数:%.3lf\r\n", Pf_data1); //串口一来打印接受功率因数
CO2_data = (((unsigned long)(Rx_Buffer1[23])) << 24) | (((unsigned long)(Rx_Buffer1[24])) << 16) | (((unsigned long)(Rx_Buffer1[25])) << 8) | Rx_Buffer1[26];
printf("二氧化碳:%lu\r\n", CO2_data);//串口一来打印接受二氧化碳
HZ = (((unsigned long)(Rx_Buffer1[31])) << 24) | (((unsigned long)(Rx_Buffer1[32])) << 16) | (((unsigned long)(Rx_Buffer1[33])) << 8) | Rx_Buffer1[34];
HZ1 = HZ * 0.01;
printf("赫兹:%.2lfHZ\r\n", HZ1);//串口一来打印接受单相交流电的赫兹
USART3_RX_STA = 0;
// wifi_null();
}
// else printf("// CRC 校验错误\r\n");//串口一来打印接受电压值
}
}
// else printf("\r\nreceive_finished标志位为0\r\n");
}
void wifi_null(void) //清空USART3_RX_BUF内存
{
for (i = 0; i < 37; i++)
Rx_Buffer1[i] = 0;
}
//下面是自己的找的串口发送函数
//初始化IO 串口3
//pclk1:PCLK1时钟频率(Mhz)
//bound:波特率
void usart3_init(u32 bound)
{
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); // GPIOB时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); //串口3时钟使能
USART_DeInit(USART3); //复位串口3
//USART3_TX PB10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PB10
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化PB10
//USART3_RX PB11
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化PB11
USART_InitStructure.USART_BaudRate = bound;//波特率一般设置为9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
USART_Init(USART3, &USART_InitStructure); //初始化串口 3
//设置中断优先级
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器
wifi_null();
//使能接收中断
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//开启中断
USART_ITConfig(USART3, USART_IT_IDLE, ENABLE);//开启空闲中断
USART_Cmd(USART3, ENABLE); //使能串口
}
//下面就是主函数了
#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "usart3.h"
int main(void)
{
u16 t;
u16 len;
u16 times = 0;
delay_init(); //ÑÓʱº¯Êý³õʼ»¯
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //ÉèÖÃNVICÖжϷÖ×é2:2λÇÀÕ¼ÓÅÏȼ¶£¬2λÏìÓ¦ÓÅÏȼ¶
uart_init(4800); //´®¿Ú-À´¼àÊÓ·¢ËÍ״̬
usart3_init(4800); //¸øµçÄÜÁ÷Á¿¼Æ·¢ËÍÊý¾Ý
read_enable = 1; //在初始化的时候就设置为一 开始启动read_data(); 来进行读电能模块
read_data();
while (1)
{
if (receive_finished) //如果接受完 receive_finished ==1 则表示延时2S后 我们就把完成的标志变成0，，这样主函数就不会执行，，就是不让它太快执行
{
delay_ms(2000);
Analysis_data(); //这个函数理论上是需要打开的
receive_finished = 0;
read_data();
//但是本次是采用的 串口中断的方式 是更高级的表示，就是串口的中断标志位变成了空闲状态就自动开启下一次的中断
}
}
}
实测可以成功那
总体的思路就是 客服给你的程序.c文件复制到串口函数中，他的代码你不用改，你就在read_data(void)函数中 用for循环调用串口发送函数把USART_SendData(USART3, Tx_Buffer1[j]); 把他的Tx_Buffer1[j]数组里面的数据 发送给模块，发送完就receive_finished == 1 表示接收完成，就是打印读出的数据，，重点是在在中断函数中 开启中断服务函数中的空闲中断很方便转化完一次就自动开始。仔细思考下很简单的。
有需要我的程序 请到我的空间里面的下载资料面，直接下载。可以参考下呢。或者直接搜索 CSDN 搜索艾锐达电能流量计的使用，，就可以出来下载文件了。