RGB matrix driver ,by a TLC5947 from Texas instrument (SPI) , and a PCF8574 (I2C)
Matrix are chainable
NO MCU on the board , you can use your own favorite MCU , you just need SPI and I2C BUS
Hardware is done , i 'm working on the sofware ( most difficult part for me ...:):) )
Warning : mistake in the Matrix lib on eagle , for the green colors LSB and MSB are inverted , you have to correct it in the software if you dont want to have the green color in mirror mode .....
Interface and IO ICs / Display Interface
PCF8574 do the ROWS , and TLC5947 the colums TLC5947 is the most tricky part to understant , it 's a kind of super 288 bit shift register TLC5947 need 36 BYTE for lighting a line of the matrix . So you need 288 BYTE for 1 entire Matrix and 1152 BYTE for four MATRIX ....