基于DSP的GPGGA定位数据提取源程序(代码).doc

温泉源：基于DSP的GPGGA定位数据提取基于DSP的GPGGA定位数据提取源程序（完整）附 录 源程序#include #include mmdrv.h #include mcbsp.h /串口头文件 #include cpu_reg.h #include lcd_86.h #define uint16 unsigned int#define uint8 unsigned char ioport unsigned portefff;#define IO_374 portefff void init_exint1_interrupt();void init_GPIO(void); void uart_rece_data_parse(void);/数据解析函数void uart_trans(void); void uart_trans_byte(unsigned int data);unsigned int flag=0xffff;char tx_re_buf1=0x38;/*/* welcome interface */*/void display()LCD_clear(0);cur_row=0; cur_col=50; LCD_pr_chars( Parse GPGGA data,20);cur_row=1; cur_col=0; LCD_pr_chars(*,22);cur_row=2; cur_col=0; LCD_pr_chars(Press key1:tm,lat,lon,hght,26);cur_row=3; cur_col=0; LCD_pr_chars(Press key2:for more data,25);cur_row=4; cur_col=11;LCD_pr_chars(please work harder,25);void main(void)unsigned int key_val;unsigned int i,j; SWWSR = 0x7fff; SWCR = 0x0001; BSCR = 0x8006; CLKMD = PLL_DIV_INIT; waitloop( 0x0400 ); CLKMD = PLL_LOCK_INIT_X(14); waitloop( 0x0400 ); PMST = 0x0168;IO_374=0xffff;/374 enable init_exint1_interrupt(); init_GPIO(); init_lcd();display(); /显示菜单 Close_LED_sign(); Close_LED_Data(); Close_LED_Traf(); waitloop( 0x0400 ); while(1)flag=0xffff; /*消抖*/i=Get_Key(); waitloop( 0x040000L );j=Get_Key(); if(i=j) key_val=j;/*保存 key_val*/ while(Get_Key() asm(tnop); /wait blank_key switch(key_val) default: break; case 1: LCD_clear(0); /清屏 uart_rece_data_parse(); /提取海拔，时间，纬度，经度 break; case 17:display();break; /*/* initial interrrupt */*/ void init_exint1_interrupt() IFR =0xffff; IMR =0x0002;/TINT=IMR.3EXINT1=IMR.1asm(trsbxtintm ); interrupt void EXINT1_isr() Close_LED_sign(); Close_LED_Data(); Close_LED_Traf();asm(tnop); /中断处理函数asm(tnop);flag=0; cur_row=7; cur_col=15; LCD_pr_chars( Uart_Stop ,17); /*/* initial GPIO */*/ void init_GPIO(void) GPIOCR =0xfffe; /EXINT1=GPIO.0=input=0,nand_cs=GPIO.6=output=1 GPIOSR =0x0040; /GPIO.6=output=1 /*/* pare GPGGA data */*/void uart_rece_data_parse(void) unsigned int ii;unsigned int jj;unsigned char data300;unsigned int tm7,latitude10,lontitude11,height8,EW2,NS2;unsigned int locate=0;unsigned int comma=0;unsigned int data_num=0;char chartable10=0,1,2,3,4,5,6,7,8,9;Uart_Init(); for(ii=0;ii300;ii+)/清空数据缓冲区 dataii =0; while(1)dojj = Uart_rx(); if(!flag) asm(tnop); break; while(jj=0xFFFF); if(locate300)/存储接收到的数据datalocate =jj; locate+;elseii=0;while(1) if(dataii=36) /$ if(ii+1)300&dataii+1=71)/G if(ii+2)300&dataii+2=80)/P if(ii+3)300&dataii+3=71)/G if(ii+4)300&dataii+4=71)/G if(ii+5)300&dataii+5=65)/A break; /判断是否为GPGGA数据 ii+; ii+=6; for(;ii300;ii+) if(dataii=36) break; /$ if(comma=1)/获取时间 tmdata_num=dataii; data_num+; else if(comma=2)/获取纬度 latitudedata_num=dataii; data_num+; else if(comma=3)/获取南北纬标志位 NSdata_num=dataii; data_num+; else if(comma=4)/获取经度 lontitudedata_num=dataii; data_num+; else if(comma=5)/获取东西经标志位 EWdata_num=dataii; data_num+; else if(comma=9) heightdata_num=dataii; data_num+; if(dataii=44)/判断是否为逗号 comma+; data_num=0;/从逗号后第一个字节开始存储数据 /LCD显示提取信息cur_col=50;cur_row=0;LCD_pr_chars(GPGGA,5);cur_col=0;cur_row=1;LCD_pr_chars(*,23); cur_col = 1; cur_row =2; LCD_pr_chars(Time:,5); LCD_nextchar(chartabletm0-48); LCD_nextchar(chartabletm1-48); LCD_nextchar(:); LCD_nextchar(chartabletm2-48); LCD_nextchar(chartabletm3-48); LCD_nextchar(:); LCD_nextchar(chartabletm4-48); LCD_nextchar(chartabletm5-48); cur_col = 1; cur_row = 3; LCD_pr_chars(Latitude:,9); for(ii=0;ii9;ii+) if(latitudeii=46) LCD_nextchar(.); else LCD_nextchar(chartablelatitudeii-48); if(NS0=78) LCD_nextchar(N); else LCD_nextchar(S); cur_col = 1; cur_row = 4; LCD_pr_chars(Longitude:,10); for(ii=0;ii9;ii+) if(lontitudeii=46) LCD_nextchar(.); else LCD_nextchar(chartablelontitudeii-48); if(EW0=69) LCD_nextchar(E); else LCD_nextchar(W); cur_col = 1; cur