基于Arduino的GPS数据解析程序

2023-05-16

这篇博客讲了我利用arduino来解析和转发原始nema 0813数据的思想和实现方法。因为arduino比较简单，无法实现串口数据接收中断，所以都写在主循环里面了。不知道代码存在何种缺陷和漏洞，欢迎大家批评指正。

GPS软件要求

· Ardiuno软件

· 监控串口1，接收数据。

· 数据格式：NEMA0813

· 解析出经纬度原始格式，xxxx.xxxxx, xxxx.xxxxx，保存，解析出短格式，2B 经度，2B 维度，保存

· 短格式：经纬度都是0.0ABCD格式小数最末4位，例如信号中经度是1234.56789，则得到67 和 89

· 经纬度都正常则LED亮。

· 串口2收到AddressWHR的时候：

· 经纬度按原始格式向串口2发送，以AddressFLT开头，跟着固定格式经纬度xxxx.xxxxx,xxxx.xxxxx，CRC结尾

· 经纬度按短格式向串口2发送：{ AddressLCT，2B 经度，2B 维度，1B CRC}

/***
 * The circuit:
 * RX is digital pin 10 (connect to TX of other device)
 * TX is digital pin 11 (connect to RX of other device)
***/
#include 
 
SoftwareSerial mySerial(10, 11);
 
char rmc_flag = 0;
char command_flag = 0;
 
char gps_data_nema[220] = {0};
char gps_data_rmc[72] = {0};
char gps_data_anal[20] = {'0','0','0','0','0','.','0','0','0','0',
                        '0','0','0','0','0','.','0','0','0','0'};//经纬度分
char gps_data_byte[4] = {0};
 
char *gprmc = "$GPRMC";
char *command = "Ad";
char command_code[2] = {0};
 
void memcpy(char *dest, char *src, int n)
{
  int i = 0;
  for(i = 0; i < n; i++)
  {
    *dest = *src;
    dest++;
    src++;
  }
}
 
int memcmp(char *s1, char *s2, int n)
{
  int i = 0;
  for(i = 0; i < n; i++)
  {
    if(*s1 != *s2)return 0;
    s1++;
    s2++;
  }
  return 1;
}
 
void setup() 
{
  Serial.begin(57600);
  mySerial.begin(4800);
}
 
void loop() {
  static char i = 0;
  static char j = 0;
  char k = 0;
  char l = 0;
  char comma[12] = {0}; //一共有12个逗号
  // put your main code here, to run repeatedly:
  if(Serial.available())
  {
    gps_data_nema[i] = Serial.read();
    Serial.print(gps_data_nema[i]);
 
	if(i == 0)
	{
	    if(gps_data_nema[i] != '

--------------------- 作者：AllenSun-1990 来源：CSDN 原文：https://blog.csdn.net/xikangsoon/article/details/72860080 版权声明：本文为作者原创文章，转载请附上博文链接！内容解析By：CSDN,CNBLOG博客文章一键转载插件) Serial.println("Warning:the data input is wrong!"); } if(gps_data_nema[i] == '

--------------------- 作者：AllenSun-1990 来源：CSDN 原文：https://blog.csdn.net/xikangsoon/article/details/72860080 版权声明：本文为作者原创文章，转载请附上博文链接！内容解析By：CSDN,CNBLOG博客文章一键转载插件; } if(gps_data_nema[i] == 0x0A) //if the end of string { if(memcmp(gps_data_nema, gprmc, 6)) { memcpy(gps_data_rmc, gps_data_nema, i); rmc_flag = 1; }; i = 0; } if(i > 210) //if the data is out range Serial.println("Warning:the data formation is false!"); i++; } if(rmc_flag == 1) { l = 0; for(k = 0; k < 72; k++) { if(gps_data_rmc[k] == ',') { comma[l] = k; l ++; } } if((comma[3]-comma[2]) == 10) { k = comma[2] + 1; memcpy(&gps_data_anal[11], &gps_data_rmc[k], 9); } if((comma[5]-comma[4]) == 11) { l = comma[4] + 1; memcpy(&gps_data_anal[0], &gps_data_rmc[l], 10); } gps_data_byte[0] = gps_data_anal[8]; gps_data_byte[1] = gps_data_anal[9]; gps_data_byte[2] = gps_data_anal[18]; gps_data_byte[3] = gps_data_anal[19]; rmc_flag = 0; } if(mySerial.available()&&(command_flag == 0)) { command_code[j] = mySerial.read(); mySerial.print(command_code[j]); j = j + 1; if(j == 2) { mySerial.print("AddressWHR"); command_flag = 1; j = 0; } } if(command_flag == 1) { if(memcmp(command, command_code, 2)) { mySerial.print("AddressFLT"); for(k = 0; k < 20; k++)mySerial.print(gps_data_anal[k]); mySerial.print("CRC"); mySerial.print("AddressLCT"); for(l = 0; l < 4; l++)mySerial.print(gps_data_byte[l]); mySerial.print("CRC"); } command_flag = 0; } }

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