Stanley Cohen / Mbed 2 deprecated Serial_parser_v2

More generic and scalable parser

Dependencies:   SLCD mbed-rtos mbed

Fork of Serial_IO_test_v6 by Stanley Cohen

serialO_v6.cpp@3:2266158bf72f, 2015-03-18 (annotated)

Committer:
scohennm
Date:
Wed Mar 18 19:08:22 2015 +0000
Revision:
3:2266158bf72f
Parent:
serialO_v5.cpp@2:8196b4cc681b 
Example of checking for a valid note:

Who changed what in which revision?

UserRevisionLine numberNew contents of line
scohennm 2:8196b4cc681b 1 #include "mbed.h"
scohennm 2:8196b4cc681b 2 #include <iostream>
scohennm 2:8196b4cc681b 3 #include <stdio.h>
scohennm 2:8196b4cc681b 4 #include <ctype.h>
scohennm 2:8196b4cc681b 5 #include <string.h>
scohennm 2:8196b4cc681b 6 #include <locale.h>
scohennm 2:8196b4cc681b 7 #include "rtos.h"
scohennm 2:8196b4cc681b 8 #include "SLCD.h"
scohennm 3:2266158bf72f 9 // Debug printout control
scohennm 3:2266158bf72f 10 #define PRINTDBUG
scohennm 3:2266158bf72f 11 #define PROGNAME "SerialIO v6\n\r"
scohennm 2:8196b4cc681b 12
scohennm 2:8196b4cc681b 13 #define LCDLEN 10
scohennm 2:8196b4cc681b 14 #define MAXCHAR 4
scohennm 2:8196b4cc681b 15 #define ALL8 "8888"
scohennm 2:8196b4cc681b 16 #define LCDUPDATE 100 //ms
scohennm 2:8196b4cc681b 17 #define LEDBLINKTIME 300 // ms *** NOTE Change of units ***
scohennm 2:8196b4cc681b 18 #define SERIALREADTIME 50 //ms
scohennm 2:8196b4cc681b 19 // ASCII constants
scohennm 2:8196b4cc681b 20 #define CR '\r'
scohennm 3:2266158bf72f 21 #define ALLNOTES "CDEFGAB" // Note only 7 unique notes.
scohennm 3:2266158bf72f 22 #define NUMTONES 10
scohennm 3:2266158bf72f 23 #define NONOTE 8
scohennm 3:2266158bf72f 24 #define NOTEOFFSET 1
scohennm 2:8196b4cc681b 25
scohennm 2:8196b4cc681b 26
scohennm 2:8196b4cc681b 27
scohennm 3:2266158bf72f 28 float diatonicScale[NUMTONES] = {246.94, 261.63,293.66,329.63,349.23,392.00,440.00,493.88,523.25,587.33};
scohennm 2:8196b4cc681b 29
scohennm 2:8196b4cc681b 30 DigitalOut rLed(LED_RED);
scohennm 2:8196b4cc681b 31
scohennm 2:8196b4cc681b 32
scohennm 2:8196b4cc681b 33 Serial pc(USBTX, USBRX); // tx, rx
scohennm 2:8196b4cc681b 34 SLCD slcd; //define LCD display
scohennm 2:8196b4cc681b 35 char rxChar;
scohennm 2:8196b4cc681b 36 char rxString[LCDLEN];
scohennm 2:8196b4cc681b 37 string rxRealString;
scohennm 2:8196b4cc681b 38
scohennm 2:8196b4cc681b 39 void clearString (char * aString){
scohennm 2:8196b4cc681b 40 int i;
scohennm 2:8196b4cc681b 41 int sSize = sizeof(aString);
scohennm 2:8196b4cc681b 42
scohennm 2:8196b4cc681b 43 for (i=0; i< sSize; i++){
scohennm 2:8196b4cc681b 44 aString[i] = NULL;
scohennm 2:8196b4cc681b 45 }
scohennm 2:8196b4cc681b 46 return;
scohennm 2:8196b4cc681b 47 }
scohennm 2:8196b4cc681b 48
scohennm 2:8196b4cc681b 49
scohennm 3:2266158bf72f 50 int isNote(char theNote){ //check for valid onte
scohennm 3:2266158bf72f 51 int noteListLen = sizeof(ALLNOTES);
scohennm 3:2266158bf72f 52 int pos = NONOTE;
scohennm 3:2266158bf72f 53 int i;
scohennm 3:2266158bf72f 54 for (i=0; i<noteListLen; i++){
scohennm 3:2266158bf72f 55 if (ALLNOTES[i] == theNote){
scohennm 3:2266158bf72f 56 pos = i;
scohennm 3:2266158bf72f 57 break;
scohennm 3:2266158bf72f 58 }
scohennm 3:2266158bf72f 59 }
scohennm 3:2266158bf72f 60 return (pos);
scohennm 3:2266158bf72f 61 }
scohennm 3:2266158bf72f 62
scohennm 2:8196b4cc681b 63
scohennm 2:8196b4cc681b 64 void LCDMessNoDwell(char *lMess){
scohennm 2:8196b4cc681b 65 slcd.Home();
scohennm 2:8196b4cc681b 66 slcd.clear();
scohennm 2:8196b4cc681b 67 slcd.printf(lMess);
scohennm 2:8196b4cc681b 68 }
scohennm 2:8196b4cc681b 69
scohennm 2:8196b4cc681b 70 // use "thread" in the name to keep things straight
scohennm 2:8196b4cc681b 71 // note the use of void constant * args - understand memory resources
scohennm 2:8196b4cc681b 72 // Thes are "forever loops"
scohennm 2:8196b4cc681b 73 void LCDdis_thread(void const *args){
scohennm 2:8196b4cc681b 74 while(true) {
scohennm 2:8196b4cc681b 75 LCDMessNoDwell(rxString);
scohennm 2:8196b4cc681b 76 Thread::wait(LCDUPDATE);
scohennm 2:8196b4cc681b 77 }
scohennm 2:8196b4cc681b 78 }
scohennm 2:8196b4cc681b 79
scohennm 2:8196b4cc681b 80 void serial_thread(void const *args){
scohennm 2:8196b4cc681b 81 static int charIndex =0;
scohennm 2:8196b4cc681b 82 int rxStringLen;
scohennm 3:2266158bf72f 83 int noteOK;
scohennm 2:8196b4cc681b 84 while(true) {
scohennm 2:8196b4cc681b 85 if (pc.readable()) { // only read from the serial port if there is a character
scohennm 3:2266158bf72f 86 rxChar= toupper(pc.getc()); // reading clears the buffer
scohennm 3:2266158bf72f 87 noteOK = isNote(rxChar);
scohennm 2:8196b4cc681b 88 // construct a 4-digit string for the LCD
scohennm 2:8196b4cc681b 89 // check for carriage return
scohennm 2:8196b4cc681b 90 if (rxChar == CR) {
scohennm 2:8196b4cc681b 91 rxRealString.assign(rxString);
scohennm 3:2266158bf72f 92 rxStringLen = rxRealString.length();
scohennm 3:2266158bf72f 93 #ifdef PRINTDBUG
scohennm 2:8196b4cc681b 94 pc.printf("%s - StringLen = %d OK \n\r", rxString, rxStringLen);
scohennm 3:2266158bf72f 95 #endif
scohennm 2:8196b4cc681b 96 charIndex = 0; // start building string from position zero next time around
scohennm 2:8196b4cc681b 97 } else {
scohennm 2:8196b4cc681b 98 if(charIndex == 0) clearString(rxString);
scohennm 2:8196b4cc681b 99 rxString[charIndex] = rxChar;
scohennm 2:8196b4cc681b 100 rxRealString.assign(rxString);
scohennm 3:2266158bf72f 101 #ifdef PRINTDBUG
scohennm 3:2266158bf72f 102 if(noteOK != NONOTE){
scohennm 3:2266158bf72f 103 pc.printf("%s - IsNote - %4.2f\n\r", rxString, diatonicScale[noteOK + NOTEOFFSET]);
scohennm 3:2266158bf72f 104 } else {
scohennm 3:2266158bf72f 105 pc.printf("%s - Not a Note\n\r", rxString);
scohennm 3:2266158bf72f 106 }
scohennm 3:2266158bf72f 107 #endif
scohennm 2:8196b4cc681b 108 charIndex = (charIndex + 1)% (MAXCHAR); // Only allow 4 characters then roll over
scohennm 2:8196b4cc681b 109
scohennm 2:8196b4cc681b 110 }
scohennm 2:8196b4cc681b 111 }
scohennm 2:8196b4cc681b 112 Thread::wait(SERIALREADTIME);
scohennm 2:8196b4cc681b 113 }
scohennm 2:8196b4cc681b 114 }
scohennm 2:8196b4cc681b 115
scohennm 2:8196b4cc681b 116 int main()
scohennm 2:8196b4cc681b 117 {
scohennm 2:8196b4cc681b 118
scohennm 2:8196b4cc681b 119 Thread lthread(LCDdis_thread);
scohennm 2:8196b4cc681b 120 Thread serthread(serial_thread);
scohennm 2:8196b4cc681b 121
scohennm 2:8196b4cc681b 122 sprintf(rxString,"%s",ALL8); // just put something on the LCD to show it's working
scohennm 3:2266158bf72f 123
scohennm 3:2266158bf72f 124 #ifdef PRINTDBUG
scohennm 3:2266158bf72f 125 pc.printf(PROGNAME);
scohennm 3:2266158bf72f 126 #endif
scohennm 2:8196b4cc681b 127
scohennm 2:8196b4cc681b 128 while (true) {
scohennm 2:8196b4cc681b 129 rLed = !rLed; // toggle led
scohennm 2:8196b4cc681b 130 Thread::wait(LEDBLINKTIME);
scohennm 2:8196b4cc681b 131 }
scohennm 2:8196b4cc681b 132 }