I took a part one of the display boards (10x[4x8] blocks) and wired it up to PIC24FJ64GB002, then created a simple loop that`ll call the shift register on the block and attempt to display a message on it

The idea was to check my connection and pin-probing

the pseudo code I wrote was something like -

while(true){

// Set Row IDs for current row (row 4):

ROW_1 = 0

ROW_2 = 1

ROW_3 = 1

// Shift for each pixel in the row -

for each pixel in row {

SRCK = 0

Green Bit = 1 // Turn pixel ON

SRCK = 1

// Shift next row

}

RCK = 0

RCK = 1

}

This code generated to following -