Hi, I’m trying to set up an led array that lights up depending on the data passed to it over the serial port. I’m trying to pass info in the format (X x Y x I) where x and y are coordinate and i is off(0) or on(1). The readSerialString puts the info in an array, my problem is that i have to pass the data to the board twice before it accepts the new parameters. Any one have an idea why?
/* Processing Button To LED Array
Ricardo de Lemos
rdelemos@ufl.edu
Version: 2.0
*/
#include <binary.h>
#include <Sprite.h>
#include <Matrix.h>
char xy[4]; //COORDINATE ARRAY
int verbose = 0; //DEBUGGING
Matrix myMatrix = Matrix(9, 8, 7); //LED ARRAY MATRIX
void setup() {
Serial.begin(9600); //SERIAL CONNECTION
}
void loop () {
if(Serial.available() > 0){
readSerialString(xy); //READ SERIAL COORDINATES
}
if(verbose == 1) {
Serial.println("");
Serial.print("0: ");
Serial.println(xy[0]);
Serial.print("1: ");
Serial.println(xy[1]);
Serial.print("2: ");
Serial.println(xy[2]);
Serial.print("3: ");
Serial.println(xy[3]);
Serial.print("4: “);
Serial.println(xy[4]);
Serial.println(”
}
char a = xy[0]; //STORE TO TEMP VARIABLE
char b = xy[2];
char c = xy[4];
int x = cTI(a); //CONVERT FROM CHAR TO INT AND STORE
int y = cTI(b);
int n = cTI(c);
if(n == 0){
myMatrix.write(x, y, LOW); //TURNS OFF SELECTED LED
}
else if (n == 3){
myMatrix.clear(); //CLEARS ARRAY
}
else {
myMatrix.write(x, y, HIGH); //TURNS ON SELECTED LED
}
if(verbose == 1) {
Serial.print("(");
Serial.print(x);
Serial.print(", “);
Serial.print(y);
Serial.print(”, “);
Serial.print(n);
Serial.println(”)");
Serial.println("~~~~~~~~~~~~~~~");
}
}
int cTI (char i){ //CHANGES FROM CHAR TO INT
if(i == ‘0’){
return 0;
}
else if(i == ‘1’){
return 1;
}
else if(i == ‘2’){
return 2;
}
else if(i == ‘3’){
return 3;
}
else if(i == ‘4’){
return 4;
}
else if(i == ‘5’){
return 5;
}
else if(i == ‘6’){
return 6;
}
else if(i == ‘7’){
return 7;
}
else if(i == ‘8’){
return 8;
}
else if(i == ‘8’){
return 9;
}
}
void readSerialString (char *strArray) { //READS SERIAL AND SAVES TO ARRAY
int i = 0;
if(!Serial.available()) {
return;
}
while (Serial.available() > 0) {
strArray = Serial.read();
- i++;*
- }*
_ strArray = 0;_
}