serial.c

00001 #include "mbed.h"
00002 #include "useful.h"
00003 
00004 Serial rs232(p13, p14);  // tx, rx
00005 /******************************************/
00006 /*                                        */
00007 /*  Test the RS232 interface              */
00008 /*  Should send and recieve data on the   */
00009 /*  serial port, send a string, and get   */
00010 /*  back what is returned from the RX     */
00011 /*                                        */
00012 /******************************************/
00013 void rs232_opener(void)
00014 {
00015     rs232.baud(9600);
00016     rs232.printf("\n\r");
00017     rs232.printf("Dome Controler\n\r");
00018     rs232.printf("\n\rCMD > ");
00019 }
00020 
00021 void rs232_output_string(char *buf)
00022 {
00023     int a = 0;
00024     while(a != strlen(buf)){
00025         rs232.putc(buf[a]);
00026         if(buf[a]=='\n')
00027             rs232.putc('\r');
00028         a++;
00029     }
00030 }
00031 
00032 int rs232_readable(void)
00033 {
00034     return(rs232.readable());
00035 }
00036 
00037 int rs232_gets(char *s,int len) 
00038 {
00039     char   c;
00040     int    cnt=0;
00041 
00042     while ((c = rs232.getc()) != 0) {
00043         if ((c == 0x0a) || (c==0x0d)) {
00044             rs232.printf("\n\r");
00045             *s++ = '\0';
00046             return(cnt);    /* Return length */
00047         } else if (c==0x7f) {  /* Delete */
00048             rs232.putc(0x08);
00049             rs232.putc(0x20);
00050             rs232.putc(0x08);
00051             cnt--;
00052             *s--;
00053         } else if (c==0x08) {  /* BS */
00054             rs232.putc(0x08);
00055             rs232.putc(0x20);
00056             rs232.putc(0x08);
00057             cnt--;
00058             *s--;
00059         } else if (c==025) {  /* CTRL-U */
00060             while (cnt!=0) {
00061                 rs232.putc(0x08);
00062                 rs232.putc(0x20);
00063                 rs232.putc(0x08);
00064                 cnt--;
00065                 *s--;
00066             }
00067         } else {
00068             *s++ = c;
00069             rs232.putc(c);
00070             cnt++;
00071         }
00072     }
00073     return(cnt);
00074 }
00075 
00076 /******************************************/
00077 /*                                        */
00078 /* Set the baud rate of the serial line   */
00079 /* from the command line input            */
00080 /*                                        */
00081 /******************************************/
00082 #define BAUD_NUMBER 10
00083 void baud_rate(int c, char **a)
00084 {
00085     int    b,cnt;
00086     int    v[BAUD_NUMBER] = {300,600,1200,2400,4800,9600,19200,38400,57600,15200};
00087     
00088     b = atoi(a[1]);
00089     cnt = 0;
00090     while(cnt < BAUD_NUMBER){
00091         if(v[cnt]==b){    
00092             rs232.baud(b);
00093             return;
00094         }
00095         cnt++;
00096     }
00097     cnt=0;
00098     lprintf("Select a speed from ");
00099     while(cnt < BAUD_NUMBER){
00100         lprintf("%d ",v[cnt]);
00101         cnt++;
00102     }
00103     lprintf("\n\r");
00104 }
00105 
00106 void serial_test(int c, char **a)
00107 {
00108     char    ch;
00109     
00110     rs232_output_string("Serial Test Routine\n\r");
00111     
00112     while(1){
00113         ch = rs232.getc();
00114         printf("Got %c\n\r",ch);
00115         if(ch=='q')
00116             return;
00117     }
00118 }