STM8解析GPS数据，为什么我得到的日期和时间都是0

战舰水手 · 发表于 2015-9-14 13:56:39

现在能够读到完整的GPRMC的数据
GPS数据解析文件gps.c 主要帮我看看 [mw_shl_code=c,true]u8 GPS_RMC_Parse(u8 *line,GPS_INFO *GPS)函数中定义的数据类型对不对？现在主程序调用 [mw_shl_code=c,true]GPS_DispTime()发到串口的解析数据都是0[/mw_shl_code]
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[mw_shl_code=c,true]#include "stm8s_it.h" #include "string.h" #include "gps.h" #include "uart1.h" GPS_INFO GPS; u8 GPS_RMC_Parse(u8 *line,GPS_INFO *GPS) { u8 ch, status, tmp; float lati_cent_tmp, lati_second_tmp; float long_cent_tmp, long_second_tmp; float speed_tmp; u8 *buf = line; ch = buf[5]; status = buf[GetComma(2, buf)]; if (ch == 'C') { if (status == 'A') { GPS -> NS = buf[GetComma(4, buf)]; GPS -> EW = buf[GetComma(6, buf)]; GPS->latitude = Get_Double_Number(&buf[GetComma(3, buf)]); GPS->longitude = Get_Double_Number(&buf[GetComma( 5, buf)]); GPS->latitude_Degree = (u8)GPS->latitude / 100; lati_cent_tmp = (GPS->latitude - GPS->latitude_Degree * 100); GPS->latitude_Cent = (u8)lati_cent_tmp; lati_second_tmp = (lati_cent_tmp - GPS->latitude_Cent) * 60; GPS->latitude_Second = (u8)lati_second_tmp; GPS->longitude_Degree = (u8)GPS->longitude / 100; long_cent_tmp = (GPS->longitude - GPS->longitude_Degree * 100); GPS->longitude_Cent = (u8)long_cent_tmp; long_second_tmp = (long_cent_tmp - GPS->longitude_Cent) * 60; GPS->longitude_Second = (u8)long_second_tmp; speed_tmp = Get_Float_Number(&buf[GetComma(7, buf)]); GPS->speed = speed_tmp * 1.85; GPS->direction = Get_Float_Number(&buf[GetComma(8, buf)]); GPS->D.hour = (buf[7] - '0') * 10 + (buf[8] - '0'); GPS->D.minute = (buf[9] - '0') * 10 + (buf[10] - '0'); GPS->D.second = (buf[11] - '0') * 10 + (buf[12] - '0'); tmp = GetComma(9, buf); GPS->D.day = (buf[tmp + 0] - '0') * 10 + (buf[tmp + 1] - '0'); GPS->D.month = (buf[tmp + 2] - '0') * 10 + (buf[tmp + 3] - '0'); GPS->D.year = (buf[tmp + 4] - '0') * 10 + (buf[tmp + 5] - '0')+2000; UTC2BTC(&GPS->D); return 0; } } return 1; } /*语法格式：GPS_GSV_Parse(char *line, GPS_INFO *GPS) 实现功能：从GPGSV的信息中解析出当前可视卫星数参数：*line 存放原始信息的数组 *GPS采集信息的结构体返回值：0解析成功或1数据无效*/ u8 GPS_GSV_Parse(u8 *line,GPS_INFO *GPS) { u8 ch; u8 *buf = line; ch = buf[5]; /*status = buf[GetComma(2, buf)];*/ if (ch == 'V') //$GPGSV { GPS->satellite = Get_Int_Number(&buf[GetComma(3, buf)]); return 0; } return 1; } /*语法格式：static uchar GetComma(uchar num,char *str) static uchar GetComma(uchar num,char *str) 实现功能：计算字符串中各个逗号的位置参数：num 查找第num个逗号在字符串中的位置 *str需要查找的字符串返回值：所要查找的到的位置或1位置溢出*/ static u8 GetComma(u8 num,u8 *str) { u8 i,j = 0; u8 len=strlen((const char*)str); for(i = 0;i < len;i ++) { if(str == ',') j++; if(j == num) return i + 1; } return 1; } /*语法格式：static u8 Str_To_Int(u8 *buf) static int Str_To_Int(char *buf) 实现功能：字符串转换为整型*/ static u8 Str_To_Int(u8 *buf) { u8 rev = 0; u8 dat; u8 *str = buf; while(*str != '\0') { switch(*str) { case '0': dat = 0; break; case '1': dat = 1; break; case '2': dat = 2; break; case '3': dat = 3; break; case '4': dat = 4; break; case '5': dat = 5; break; case '6': dat = 6; break; case '7': dat = 7; break; case '8': dat = 8; break; case '9': dat = 9; break; } rev = rev * 10 + dat; str ++; } return rev; } /*语法格式：static u8 Get_Int_Number(u8 *s) static int Get_Int_Number(char *s)*/ static u8 Get_Int_Number(u8 *s) { u8 buf[10]; u8 i; u8 rev; i=GetComma(1, s); i = i - 1; strncpy((char*)buf, (const char*)s, i); buf = 0; rev=Str_To_Int(buf); return rev; } /*语法格式：static u8 Get_Int_Number(u8 *s) static int Get_Int_Number(char *s) 实现功能：字符串转换为单精度*/ static float Str_To_Float(u8*buf) { float rev = 0; float dat; u8 integer = 1; u8 *str = buf; u8 i; while(*str != '\0') { switch(*str) { case '0': dat = 0; break; case '1': dat = 1; break; case '2': dat = 2; break; case '3': dat = 3; break; case '4': dat = 4; break; case '5': dat = 5; break; case '6': dat = 6; break; case '7': dat = 7; break; case '8': dat = 8; break; case '9': dat = 9; break; case '.': dat = '.'; break; } if(dat == '.') { integer = 0; i = 1; str ++; continue; } if( integer == 1 ) { rev = rev * 10 + dat; } else { rev = rev + dat / (10 * i); i = i * 10 ; } str ++; } return rev; } /*语法格式：static float Get_Float_Number(u8 *s) static float Get_Float_Number(char *s)*/ static float Get_Float_Number(u8 *s) { u8 buf[10]; u8 i; float rev; i=GetComma(1, s); i = i - 1; strncpy((char*)buf, (const char*)s, i); buf = 0; rev=Str_To_Float(buf); return rev; } /*语法格式：static double Str_To_Double(u8*buf) static double Str_To_Double(char *buf) 实现功能：字符串转换为双精度*/ static double Str_To_Double(u8 *buf) { double rev = 0; double dat; u8 integer = 1; u8 *str = buf; u8 i; while(*str != '\0') { switch(*str) { case '0': dat = 0; break; case '1': dat = 1; break; case '2': dat = 2; break; case '3': dat = 3; break; case '4': dat = 4; break; case '5': dat = 5; break; case '6': dat = 6; break; case '7': dat = 7; break; case '8': dat = 8; break; case '9': dat = 9; break; case '.': dat = '.'; break; } if(dat == '.') { integer = 0; i = 1; str ++; continue; } if( integer == 1 ) { rev = rev * 10 + dat; } else { rev = rev + dat / (10 * i); i = i * 10 ; } str ++; } return rev; } /*语法格式：static double Get_Double_Number(u8 *s) static double Get_Double_Number(u8 *s)*/ static double Get_Double_Number(u8 *s) { u8 buf[10]; u8 i; double rev; i=GetComma(1, s); i = i - 1; strncpy((char*)buf, (const char*)s, i); buf = 0; rev=Str_To_Double(buf); return rev; } static void UTC2BTC(DATE_TIME *GPS) { GPS->second ++; if(GPS->second > 59) { GPS->second = 0; GPS->minute ++; if(GPS->minute > 59) { GPS->minute = 0; GPS->hour ++; } } GPS->hour = GPS->hour + 8; if(GPS->hour > 23) { GPS->hour -= 24; GPS->day += 1; if(GPS->month == 2 || GPS->month == 4 || GPS->month == 6 || GPS->month == 9 || GPS->month == 11 ) { if(GPS->day > 30) { GPS->day = 1; GPS->month++; } } else { if(GPS->day > 31) { GPS->day = 1; GPS->month ++; } } if(GPS->year % 4 == 0 ) { if(GPS->day > 29 && GPS->month == 2) { GPS->day = 1; GPS->month ++; } } else { if(GPS->day > 28 &&GPS->month == 2) { GPS->day = 1; GPS->month ++; } } if(GPS->month > 12) { GPS->month -= 12; GPS->year ++; } } } void Int_To_Str(u8 x,u8 *Str) { u8 t; u8 *Ptr,Buf[5]; s8 i = 0;/*如果定义为u8即unsigned char（unsigned int）那i>=0必然成立，所以定义为s8即char（unsigned int）*/ Ptr = Str; if(x < 10) { *Ptr ++ = '0'; *Ptr ++ = x+0x30; } else { while(x > 0) { t = x % 10; x = x / 10; Buf[i++] = t+0x30; } i -- ; for(;i>=0;i --) { *(Ptr++) = Buf; } } *Ptr = '\0'; } void GPS_DispTime(void) { u8 i = 0; u8 ch; u8 time[5]; u8 len; UART1_printf("日期:"); Int_To_Str(GPS.D.year,time); UART1_printf(time); /*while(time != '\0') { ch = time[i++]; UART1_SendByte(ch); }*/ len=strlen((char const*)time); for(i=0;i<len;i++) { ch = time[i++]; UART1_SendByte(ch); } UART1_printf("年"); Int_To_Str(GPS.D.month,time); i = 0; while(time != '\0') { ch = time[i++]; UART1_SendByte(ch); } UART1_printf("月"); Int_To_Str(GPS.D.day,time); i = 0; while(time != '\0') { ch = time[i++]; UART1_SendByte(ch); } UART1_printf("日"); UART1_printf("\r\n"); UART1_printf("时间："); Int_To_Str(GPS.D.hour,time); i=0; while(time != '\0') { ch = time[i++]; UART1_SendByte(ch); } UART1_SendByte(' '); UART1_SendByte(':'); Int_To_Str(GPS.D.minute,time); i = 0; while(time != '\0') { ch = time[i++]; UART1_SendByte(ch); } UART1_SendByte(' '); UART1_SendByte(':'); Int_To_Str(GPS.D.second,time); i = 0; while(time != '\0') { ch = time[i++]; UART1_SendByte(ch); } UART1_printf("\r\n"); } [/mw_shl_code]

[mw_shl_code=c,true]GPS_INFO结构体定义在头文件gps.h中
[mw_shl_code=c,true]#ifndef __GPS_H_ #define __GPS_H_ typedef struct{ u8 year; u8 month; u8 day; u8 hour; u8 minute; u8 second; }DATE_TIME; typedef struct{ double latitude; double longitude; u8 latitude_Degree; u8 latitude_Cent; u8 latitude_Second; u8 longitude_Degree; u8 longitude_Cent; u8 longitude_Second; float speed; float direction; float height_ground; float height_sea; u8 satellite; u8 NS; u8 EW; DATE_TIME D; }GPS_INFO; u8 GPS_RMC_Parse(u8 *line,GPS_INFO *GPS); u8 GPS_GGA_Parse(u8 *line,GPS_INFO *GPS); u8 GPS_GSV_Parse(u8 *line,GPS_INFO *GPS); static double Get_Double_Number(u8 *s); static double Str_To_Double(u8 *buf); static float Get_Float_Number(u8 *s); static float Str_To_Float(u8*buf); static u8 Get_Int_Number(u8 *s); static u8 Str_To_Int(u8 *buf); static u8 GetComma(u8 num,u8 *str); static void UTC2BTC(DATE_TIME *GPS); void Int_To_Str(u8 x,u8 *Str); void GPS_DispTime(void); #endif //__GPS_H_[/mw_shl_code]

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