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| //Example_RGBMatrix.ino | |
| //By: Ryan Owens @ SparkFun Electronics | |
| // | |
| //modified 27 Oct 2014 | |
| //by Bobby Chan @ SparkFun Electronics | |
| // This is example code to output an array to | |
| // the RGB Serial Backpack Matrix and set the position of | |
| // a daisy chained matrix. | |
| //Define the "Normal" Colors | |
| #define BLACK 0x00 | |
| #define RED 0xE0 | |
| #define GREEN 0x1C | |
| #define BLUE 0x03 | |
| #define YELLOW RED|GREEN | |
| #define ORANGE 0xFC | |
| #define MAGENTA RED|BLUE | |
| #define TEAL BLUE|GREEN | |
| #define WHITE (RED|GREEN|BLUE)-0xA0 | |
| //Define the SPI Pin Numbers | |
| #define SLAVESELECT 10//ss | |
| #define DATAOUT 11//MOSI | |
| #define DATAIN 12//MISO | |
| #define SPICLOCK 13//sck | |
| //Define final array to output to LED Matrices (maximum of 8 matrices daisy chained) | |
| //Ex.) if you have 1 matrix, you have an array of 64=64*1 | |
| // if you have 2 matrices, you have an array of 128=64*2 | |
| // if you have 3 matrices, you have an array of 194=64*3 | |
| const int num_matrix = 1; //define number of daisy chained matrices | |
| char color_buffer[64*num_matrix]; //final array | |
| //array to clear 1 matrix | |
| char blank[]={ | |
| BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, | |
| BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, | |
| BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, | |
| BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, | |
| BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, | |
| BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, | |
| BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, | |
| BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK, BLACK | |
| }; | |
| //set LED Matrix Value for daisy chained LED Matrices | |
| //maximum of 8 daisy chained LED Matrices | |
| void set_matrix(){ | |
| digitalWrite(SLAVESELECT, LOW); //Activate the RGB Matrix | |
| spi_transfer(0x25); //command character % == 0x25 | |
| spi_transfer(0x02); //set LED matrix to position in daisy chain, must be between 0x01-0x08 | |
| digitalWrite(SLAVESELECT, HIGH); //Deactivate the RGB Matrix | |
| } | |
| int p = 0; //dot position | |
| int xMAX = 8;//max number column in 1 subset | |
| int yMAX = 8;//max number row in 1 subset | |
| void clear_buffer(){ | |
| //start clearing array moving down rows | |
| for(int y=0; y<yMAX; y++){ | |
| //clear array from the highest subset in daisy chained array | |
| for(int i=num_matrix; i>0; i--){ | |
| //clear array from right to left | |
| for(int x=0; x<xMAX; x++){ | |
| //current position that is being cleared | |
| p = (yMAX*y) + (x + (i-1)*(xMAX*yMAX)); | |
| //clear by saving what is in the blank sub-array to your final array | |
| color_buffer[p] = blank[x]; | |
| } | |
| } | |
| } | |
| matrix_write();//write array of colors to matrix | |
| delay(10);//allow some time for the final matrix to be seen | |
| } | |
| void color_test(){ | |
| //Load colors into the first row color buffer array. | |
| //This will be the array of colors sent to the first RGB matrix. | |
| color_buffer[0]=BLACK; | |
| color_buffer[1]=RED; | |
| color_buffer[2]=GREEN; | |
| color_buffer[3]=BLUE; | |
| color_buffer[4]=YELLOW; | |
| color_buffer[5]=MAGENTA; | |
| color_buffer[6]=TEAL; | |
| color_buffer[7]=WHITE; | |
| matrix_write();//write array of colors to matrix | |
| delay(100); //allow some time for the final matrix to be seen | |
| } | |
| void setup(){ | |
| //----------SPI BUS SETUP---------- | |
| SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1); //Enable SPI HW, Master Mode, divide clock by 16 | |
| //Set the pin modes for the RGB matrix | |
| pinMode(DATAOUT, OUTPUT); | |
| pinMode(DATAIN, INPUT); | |
| pinMode(SPICLOCK,OUTPUT); | |
| pinMode(SLAVESELECT,OUTPUT); | |
| //Make sure the RGB matrix is deactivated | |
| digitalWrite(SLAVESELECT,HIGH); | |
| //----------END SPI BUS SETUP---------- | |
| //use this to set a LED Matrix to position in daisy chain | |
| //set_matrix(); | |
| //make sure buffer is cleared before writing to matrices | |
| clear_buffer(); | |
| //test colors | |
| color_test(); | |
| //for debugging | |
| //Serial.begin(9600); | |
| //Serial.println("Initializing Matrix"); | |
| } | |
| void loop(){ | |
| } | |
| //display array on the LED Matrix/daisy chained LED Matrices | |
| void matrix_write(){ | |
| digitalWrite(SLAVESELECT, LOW); //Activate the RGB Matrix | |
| spi_transfer(0x26); //command char to reset frame index | |
| digitalWrite(SLAVESELECT, HIGH); //Deactivate the RGB Matrix | |
| digitalWrite(SLAVESELECT, LOW); //Activate the RGB Matrix | |
| //Send the color buffer to the RGB Matrix | |
| delayMicroseconds(500); | |
| for(int LED=0; LED<(64*num_matrix); LED++){ | |
| spi_transfer(color_buffer[LED]);//send what is in buffer to the matrices | |
| } | |
| delayMicroseconds(500);//allow some time for the serial data to be sent | |
| digitalWrite(SLAVESELECT, HIGH); //Deactivate the RGB Matrix | |
| } | |
| //Use this command to send a single color value to the RGB matrix. | |
| //NOTE: You must send x number of color values to the RGB matrix | |
| // before it displays an image! | |
| char spi_transfer(volatile char data){ | |
| SPDR = data; // Start the transmission | |
| while (!(SPSR & (1<<SPIF))){ | |
| // Wait for the end of the transmission | |
| }; | |
| return SPDR; // return the received byte | |
| } |