main.cpp

00001 #include "mbed.h"
00002 #include "TextLCD.h"
00003 
00004 #define READBUFFERSIZE (32)
00005 
00006 Serial g_serial(USBTX, USBRX);
00007 TextLCD g_lcd(p15, p16, p17, p18, p19, p20);  // RS, E, DB4, DB5, DB6, DB7
00008 
00009 int ReadLineString( Serial& serial,
00010                     char szReadBuffer[], const int ciReadBufferSize, int& riIndexChar,
00011                     char szLineString[], const int ciLineStringSize )
00012 {
00013     while( 1 )
00014     {
00015         if( !serial.readable() )
00016         {
00017             break;
00018         }
00019         char c = serial.getc();
00020         if( '\r' == c  )
00021         {
00022             szReadBuffer[riIndexChar] = '\0';
00023             strncpy( szLineString, szReadBuffer, ciLineStringSize - 1 );
00024             szLineString[ciLineStringSize - 1] = '\0';
00025             riIndexChar = 0;
00026             return 1;
00027         }
00028         else if( '\n' == c )
00029         {
00030             ;
00031         }
00032         else
00033         {
00034             if( (ciReadBufferSize - 1) > riIndexChar )
00035             {
00036                 szReadBuffer[riIndexChar] = c;
00037                 riIndexChar++;
00038             }
00039         }
00040     }
00041 
00042     return 0;
00043 }
00044 
00045 int main()
00046 {
00047     // setup
00048     g_serial.baud(9600);
00049     wait(0.001);
00050     g_lcd.cls(); wait(0.001);
00051     g_lcd.printf( "(ready)" );
00052     
00053     // loop
00054     int iCounter = 0;
00055     char szReadBuffer[READBUFFERSIZE] = "";
00056     int iIndexChar = 0;
00057     while(1)
00058     {
00059         // send
00060         g_serial.printf( "%d\n", iCounter );
00061         iCounter++;
00062         wait(1.0);
00063         
00064         // read
00065         char szLineString[READBUFFERSIZE];
00066         if( !ReadLineString( g_serial, 
00067                              szReadBuffer, READBUFFERSIZE, iIndexChar,
00068                              szLineString, READBUFFERSIZE ) )
00069         {
00070             continue;
00071         }
00072         g_lcd.cls(); wait(0.001);
00073         g_lcd.locate(0, 0);
00074         g_lcd.printf( szLineString );
00075     }
00076 }