More generic and scalable parser
Dependencies: SLCD mbed-rtos mbed
Fork of Serial_IO_test_v6 by
Diff: serialO_v6.cpp
- Revision:
- 4:31207d384db0
- Parent:
- 3:2266158bf72f
--- a/serialO_v6.cpp Wed Mar 18 19:08:22 2015 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,132 +0,0 @@ -#include "mbed.h" -#include <iostream> -#include <stdio.h> -#include <ctype.h> -#include <string.h> -#include <locale.h> -#include "rtos.h" -#include "SLCD.h" -// Debug printout control -#define PRINTDBUG -#define PROGNAME "SerialIO v6\n\r" - -#define LCDLEN 10 -#define MAXCHAR 4 -#define ALL8 "8888" -#define LCDUPDATE 100 //ms -#define LEDBLINKTIME 300 // ms *** NOTE Change of units *** -#define SERIALREADTIME 50 //ms -// ASCII constants -#define CR '\r' -#define ALLNOTES "CDEFGAB" // Note only 7 unique notes. -#define NUMTONES 10 -#define NONOTE 8 -#define NOTEOFFSET 1 - - - -float diatonicScale[NUMTONES] = {246.94, 261.63,293.66,329.63,349.23,392.00,440.00,493.88,523.25,587.33}; - -DigitalOut rLed(LED_RED); - - -Serial pc(USBTX, USBRX); // tx, rx -SLCD slcd; //define LCD display -char rxChar; -char rxString[LCDLEN]; -string rxRealString; - -void clearString (char * aString){ - int i; - int sSize = sizeof(aString); - - for (i=0; i< sSize; i++){ - aString[i] = NULL; - } - return; -} - - -int isNote(char theNote){ //check for valid onte - int noteListLen = sizeof(ALLNOTES); - int pos = NONOTE; - int i; - for (i=0; i<noteListLen; i++){ - if (ALLNOTES[i] == theNote){ - pos = i; - break; - } - } - return (pos); -} - - -void LCDMessNoDwell(char *lMess){ - slcd.Home(); - slcd.clear(); - slcd.printf(lMess); -} - -// use "thread" in the name to keep things straight -// note the use of void constant * args - understand memory resources -// Thes are "forever loops" -void LCDdis_thread(void const *args){ - while(true) { - LCDMessNoDwell(rxString); - Thread::wait(LCDUPDATE); - } -} - -void serial_thread(void const *args){ - static int charIndex =0; - int rxStringLen; - int noteOK; - while(true) { - if (pc.readable()) { // only read from the serial port if there is a character - rxChar= toupper(pc.getc()); // reading clears the buffer - noteOK = isNote(rxChar); - // construct a 4-digit string for the LCD - // check for carriage return - if (rxChar == CR) { - rxRealString.assign(rxString); - rxStringLen = rxRealString.length(); -#ifdef PRINTDBUG - pc.printf("%s - StringLen = %d OK \n\r", rxString, rxStringLen); -#endif - charIndex = 0; // start building string from position zero next time around - } else { - if(charIndex == 0) clearString(rxString); - rxString[charIndex] = rxChar; - rxRealString.assign(rxString); -#ifdef PRINTDBUG - if(noteOK != NONOTE){ - pc.printf("%s - IsNote - %4.2f\n\r", rxString, diatonicScale[noteOK + NOTEOFFSET]); - } else { - pc.printf("%s - Not a Note\n\r", rxString); - } -#endif - charIndex = (charIndex + 1)% (MAXCHAR); // Only allow 4 characters then roll over - - } - } - Thread::wait(SERIALREADTIME); - } -} - -int main() -{ - - Thread lthread(LCDdis_thread); - Thread serthread(serial_thread); - - sprintf(rxString,"%s",ALL8); // just put something on the LCD to show it's working - -#ifdef PRINTDBUG - pc.printf(PROGNAME); -#endif - - while (true) { - rLed = !rLed; // toggle led - Thread::wait(LEDBLINKTIME); - } -} \ No newline at end of file