hello Steffensen & BroHogan,
I add the same result for 2 colors without ISR, for only 3x2 matrix.
int sizeX = 3;
int sizeY = 2;
int bitTable[8]={ 128, 64, 32, 16, 8, 4, 2, 1 };
int dataIn = 5;
int load = 6;
int clock = 7;
int maxInUse = 3; //change this variable to set how many MAX7219's you'll use
int e = 0; // just a varialble
// define max7219 registers
byte max7219_reg_noop = 0x00;
byte max7219_reg_digit0 = 0x01;
byte max7219_reg_digit1 = 0x02;
byte max7219_reg_digit2 = 0x03;
byte max7219_reg_digit3 = 0x04;
byte max7219_reg_digit4 = 0x05;
byte max7219_reg_digit5 = 0x06;
byte max7219_reg_digit6 = 0x07;
byte max7219_reg_digit7 = 0x08;
byte max7219_reg_decodeMode = 0x09;
byte max7219_reg_intensity = 0x0a;
byte max7219_reg_scanLimit = 0x0b;
byte max7219_reg_shutdown = 0x0c;
byte max7219_reg_displayTest = 0x0f;
void putByte(byte data) {
byte i = 8;
byte mask;
while(i > 0) {
mask = 0x01 << (i - 1); // get bitmask
digitalWrite( clock, LOW); // tick
if (data & mask){ // choose bit
digitalWrite(dataIn, HIGH);// send 1
}else{
digitalWrite(dataIn, LOW); // send 0
}
digitalWrite(clock, HIGH); // tock
--i; // move to lesser bit
}
}
void maxSingle( byte reg, byte col) {
//maxSingle is the "easy" function to use for a //single max7219
digitalWrite(load, LOW); // begin
putByte(reg); // specify register
putByte(col);//((data & 0x01) * 256) + data >> 1); // put data
digitalWrite(load, LOW); // and load da nuts
digitalWrite(load,HIGH);
}
void maxAll (byte reg, byte col) { // initialize all MAX7219's in the system
int c = 0;
digitalWrite(load, LOW); // begin
for ( c =1; c<= maxInUse; c++) {
putByte(reg); // specify register
putByte(col);//((data & 0x01) * 256) + data >> 1); // put data
}
digitalWrite(load, LOW);
digitalWrite(load,HIGH);
}
void maxOne(byte maxNr, byte reg, byte col) {
//maxOne is for adressing different MAX7219's,
//whilele having a couple of them cascaded
int c = 0;
digitalWrite(load, LOW); // begin
for ( c = maxInUse; c > maxNr; c--) {
putByte(0); // means no operation
putByte(0); // means no operation
}
putByte(reg); // specify register
putByte(col);//((data & 0x01) * 256) + data >> 1); // put data
for ( c =maxNr-1; c >= 1; c--) {
putByte(0); // means no operation
putByte(0); // means no operation
}
digitalWrite(load, LOW); // and load da nuts
digitalWrite(load,HIGH);
}
void setup () {
pinMode(dataIn, OUTPUT);
pinMode(clock, OUTPUT);
pinMode(load, OUTPUT);
//initiation of the max 7219
maxAll(max7219_reg_scanLimit, 0x07);
maxAll(max7219_reg_decodeMode, 0x00); // using an led matrix (not digits)
maxAll(max7219_reg_shutdown, 0x00); // not in shutdown mode
maxAll(max7219_reg_displayTest, 0x00); // no display test
for (e=1; e<=8; e++) { // empty registers, turn all LEDs off
maxAll(e,0);
}
maxAll(max7219_reg_intensity, 0x0f & 0x0f); // the first 0x0f is the value you can set
// range: 0x00 to 0x0f
//Reset();
}
void loop () {
// a little pattern very ugly
// it will be replace by a big function to update the matrix from serial messages sent from Max/msp to the board!
maxOne(1,1,128);
maxOne(1,2,64);
maxOne(2,1,32);
maxOne(2,2,190);
WakeUpR();
ShutdownR();
WakeUpB();
ShutdownB();
}
void ShutdownR()
{
maxOne(1,max7219_reg_shutdown, 0x00);
}
void ShutdownB()
{
maxOne(2,max7219_reg_shutdown, 0x00);
}
void WakeUpR()
{
maxOne(1,max7219_reg_shutdown, 0x01);
}
void WakeUpB()
{
maxOne(2,max7219_reg_shutdown, 0x01);
}
I'm sure ISR would be cleaner and more efficient.
But I DON'T have any flicker or very bad effects
It works fine
But the target is 8x8.
Do you think the fact the matrix is greater could create problems?
I tested this code with 3 colors... doesn't work :o :o probably my messsssy breadboard ;D
Happy to hear it.