Nobuki HIRAMINE
/
serial_sendreceive
Serial communication. send and receive.
main.cpp@0:6c9ad71dd3b9, 2012-06-17 (annotated)
- Committer:
- nobuki
- Date:
- Sun Jun 17 03:39:19 2012 +0000
- Revision:
- 0:6c9ad71dd3b9
Version 1
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
nobuki | 0:6c9ad71dd3b9 | 1 | #include "mbed.h" |
nobuki | 0:6c9ad71dd3b9 | 2 | #include "TextLCD.h" |
nobuki | 0:6c9ad71dd3b9 | 3 | |
nobuki | 0:6c9ad71dd3b9 | 4 | #define READBUFFERSIZE (32) |
nobuki | 0:6c9ad71dd3b9 | 5 | |
nobuki | 0:6c9ad71dd3b9 | 6 | Serial g_serial(USBTX, USBRX); |
nobuki | 0:6c9ad71dd3b9 | 7 | TextLCD g_lcd(p15, p16, p17, p18, p19, p20); // RS, E, DB4, DB5, DB6, DB7 |
nobuki | 0:6c9ad71dd3b9 | 8 | |
nobuki | 0:6c9ad71dd3b9 | 9 | int ReadLineString( Serial& serial, |
nobuki | 0:6c9ad71dd3b9 | 10 | char szReadBuffer[], const int ciReadBufferSize, int& riIndexChar, |
nobuki | 0:6c9ad71dd3b9 | 11 | char szLineString[], const int ciLineStringSize ) |
nobuki | 0:6c9ad71dd3b9 | 12 | { |
nobuki | 0:6c9ad71dd3b9 | 13 | while( 1 ) |
nobuki | 0:6c9ad71dd3b9 | 14 | { |
nobuki | 0:6c9ad71dd3b9 | 15 | if( !serial.readable() ) |
nobuki | 0:6c9ad71dd3b9 | 16 | { |
nobuki | 0:6c9ad71dd3b9 | 17 | break; |
nobuki | 0:6c9ad71dd3b9 | 18 | } |
nobuki | 0:6c9ad71dd3b9 | 19 | char c = serial.getc(); |
nobuki | 0:6c9ad71dd3b9 | 20 | if( '\r' == c ) |
nobuki | 0:6c9ad71dd3b9 | 21 | { |
nobuki | 0:6c9ad71dd3b9 | 22 | szReadBuffer[riIndexChar] = '\0'; |
nobuki | 0:6c9ad71dd3b9 | 23 | strncpy( szLineString, szReadBuffer, ciLineStringSize - 1 ); |
nobuki | 0:6c9ad71dd3b9 | 24 | szLineString[ciLineStringSize - 1] = '\0'; |
nobuki | 0:6c9ad71dd3b9 | 25 | riIndexChar = 0; |
nobuki | 0:6c9ad71dd3b9 | 26 | return 1; |
nobuki | 0:6c9ad71dd3b9 | 27 | } |
nobuki | 0:6c9ad71dd3b9 | 28 | else if( '\n' == c ) |
nobuki | 0:6c9ad71dd3b9 | 29 | { |
nobuki | 0:6c9ad71dd3b9 | 30 | ; |
nobuki | 0:6c9ad71dd3b9 | 31 | } |
nobuki | 0:6c9ad71dd3b9 | 32 | else |
nobuki | 0:6c9ad71dd3b9 | 33 | { |
nobuki | 0:6c9ad71dd3b9 | 34 | if( (ciReadBufferSize - 1) > riIndexChar ) |
nobuki | 0:6c9ad71dd3b9 | 35 | { |
nobuki | 0:6c9ad71dd3b9 | 36 | szReadBuffer[riIndexChar] = c; |
nobuki | 0:6c9ad71dd3b9 | 37 | riIndexChar++; |
nobuki | 0:6c9ad71dd3b9 | 38 | } |
nobuki | 0:6c9ad71dd3b9 | 39 | } |
nobuki | 0:6c9ad71dd3b9 | 40 | } |
nobuki | 0:6c9ad71dd3b9 | 41 | |
nobuki | 0:6c9ad71dd3b9 | 42 | return 0; |
nobuki | 0:6c9ad71dd3b9 | 43 | } |
nobuki | 0:6c9ad71dd3b9 | 44 | |
nobuki | 0:6c9ad71dd3b9 | 45 | int main() |
nobuki | 0:6c9ad71dd3b9 | 46 | { |
nobuki | 0:6c9ad71dd3b9 | 47 | // setup |
nobuki | 0:6c9ad71dd3b9 | 48 | g_serial.baud(9600); |
nobuki | 0:6c9ad71dd3b9 | 49 | wait(0.001); |
nobuki | 0:6c9ad71dd3b9 | 50 | g_lcd.cls(); wait(0.001); |
nobuki | 0:6c9ad71dd3b9 | 51 | g_lcd.printf( "(ready)" ); |
nobuki | 0:6c9ad71dd3b9 | 52 | |
nobuki | 0:6c9ad71dd3b9 | 53 | // loop |
nobuki | 0:6c9ad71dd3b9 | 54 | int iCounter = 0; |
nobuki | 0:6c9ad71dd3b9 | 55 | char szReadBuffer[READBUFFERSIZE] = ""; |
nobuki | 0:6c9ad71dd3b9 | 56 | int iIndexChar = 0; |
nobuki | 0:6c9ad71dd3b9 | 57 | while(1) |
nobuki | 0:6c9ad71dd3b9 | 58 | { |
nobuki | 0:6c9ad71dd3b9 | 59 | // send |
nobuki | 0:6c9ad71dd3b9 | 60 | g_serial.printf( "%d\n", iCounter ); |
nobuki | 0:6c9ad71dd3b9 | 61 | iCounter++; |
nobuki | 0:6c9ad71dd3b9 | 62 | wait(1.0); |
nobuki | 0:6c9ad71dd3b9 | 63 | |
nobuki | 0:6c9ad71dd3b9 | 64 | // read |
nobuki | 0:6c9ad71dd3b9 | 65 | char szLineString[READBUFFERSIZE]; |
nobuki | 0:6c9ad71dd3b9 | 66 | if( !ReadLineString( g_serial, |
nobuki | 0:6c9ad71dd3b9 | 67 | szReadBuffer, READBUFFERSIZE, iIndexChar, |
nobuki | 0:6c9ad71dd3b9 | 68 | szLineString, READBUFFERSIZE ) ) |
nobuki | 0:6c9ad71dd3b9 | 69 | { |
nobuki | 0:6c9ad71dd3b9 | 70 | continue; |
nobuki | 0:6c9ad71dd3b9 | 71 | } |
nobuki | 0:6c9ad71dd3b9 | 72 | g_lcd.cls(); wait(0.001); |
nobuki | 0:6c9ad71dd3b9 | 73 | g_lcd.locate(0, 0); |
nobuki | 0:6c9ad71dd3b9 | 74 | g_lcd.printf( szLineString ); |
nobuki | 0:6c9ad71dd3b9 | 75 | } |
nobuki | 0:6c9ad71dd3b9 | 76 | } |