Stanley Cohen / Mbed 2 deprecated Serial_IO_test_v3

Serial I/O program using rtos and ttreads for NMNU Ambient Computing

Dependencies:   SLCD mbed-rtos mbed

Fork of Serial_IO_test_v2 by Stanley Cohen

serialO_v2.cpp@0:60b70ac7ed38, 2015-03-05 (annotated)

Committer:
scohennm
Date:
Thu Mar 05 03:33:01 2015 +0000
Revision:
0:60b70ac7ed38
Use ISR instead of checking char buffer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
scohennm 0:60b70ac7ed38 1 #include "mbed.h"
scohennm 0:60b70ac7ed38 2 #include "SLCD.h"
scohennm 0:60b70ac7ed38 3
scohennm 0:60b70ac7ed38 4 #define LCDLEN 10
scohennm 0:60b70ac7ed38 5 #define MAXCHAR 4
scohennm 0:60b70ac7ed38 6 #define LEDBLINKTIME 0.2f
scohennm 0:60b70ac7ed38 7
scohennm 0:60b70ac7ed38 8
scohennm 0:60b70ac7ed38 9 DigitalOut rLed(LED_RED);
scohennm 0:60b70ac7ed38 10
scohennm 0:60b70ac7ed38 11
scohennm 0:60b70ac7ed38 12 Serial pc(USBTX, USBRX); // tx, rx
scohennm 0:60b70ac7ed38 13 SLCD slcd; //define LCD display
scohennm 0:60b70ac7ed38 14 char rxChar;
scohennm 0:60b70ac7ed38 15 int charIndex = 0;
scohennm 0:60b70ac7ed38 16 char rxString[LCDLEN];
scohennm 0:60b70ac7ed38 17 bool charReady = false;
scohennm 0:60b70ac7ed38 18
scohennm 0:60b70ac7ed38 19 // set up intterupt for serial port
scohennm 0:60b70ac7ed38 20
scohennm 0:60b70ac7ed38 21 void serialISR(){
scohennm 0:60b70ac7ed38 22 rxChar = pc.getc(); // reading clears the buffer
scohennm 0:60b70ac7ed38 23 pc.printf("%c\n\r", rxChar);
scohennm 0:60b70ac7ed38 24 rxString[charIndex] = rxChar;
scohennm 0:60b70ac7ed38 25 charIndex = (charIndex + 1 )% MAXCHAR;
scohennm 0:60b70ac7ed38 26 charReady = true;
scohennm 0:60b70ac7ed38 27 return;
scohennm 0:60b70ac7ed38 28 }
scohennm 0:60b70ac7ed38 29
scohennm 0:60b70ac7ed38 30 void LCDMessNoDwell(char *lMess){
scohennm 0:60b70ac7ed38 31 slcd.Home();
scohennm 0:60b70ac7ed38 32 slcd.clear();
scohennm 0:60b70ac7ed38 33 slcd.printf(lMess);
scohennm 0:60b70ac7ed38 34 }
scohennm 0:60b70ac7ed38 35
scohennm 0:60b70ac7ed38 36
scohennm 0:60b70ac7ed38 37 int main()
scohennm 0:60b70ac7ed38 38 {
scohennm 0:60b70ac7ed38 39 // set up interrupt
scohennm 0:60b70ac7ed38 40 pc.attach(&serialISR);
scohennm 0:60b70ac7ed38 41
scohennm 0:60b70ac7ed38 42 while (true) {
scohennm 0:60b70ac7ed38 43 rLed = !rLed; // toggle led
scohennm 0:60b70ac7ed38 44 if (charReady) {
scohennm 0:60b70ac7ed38 45 LCDMessNoDwell(rxString);
scohennm 0:60b70ac7ed38 46 charReady = false;
scohennm 0:60b70ac7ed38 47 }
scohennm 0:60b70ac7ed38 48 wait(LEDBLINKTIME);
scohennm 0:60b70ac7ed38 49 }
scohennm 0:60b70ac7ed38 50 }