Dot Matrix Graphic Display using PIC controller

As'salam o alaikm

Dot matrix is an array of LEDs (group of LEDs) which use to display Graphic or text by different combination of ON LEDs.

Programming of dot matrix is very tricky let start to make a Program for “E” Text Graphic to display like as under.Programming of dot matrix is very tricky let start to make a Program for “E” Text Graphic to display like as under. 

Pin Out 7x5 Matrix: 

  

Dot matrix consist on 7 rows and 5 columns, So scan columns by logic 1 and apply logic 0 to that row where desire LED exists to ON.

For “E” text Graphic:

1.       Column 1=high all other Columns =0, & all rows = low to display 1^st line.

2.       Column 2=high all other columns =0, & R1, R4 and R7 low and all other high.

3.       Same as rows logic for Column 3 and 4

4.       Column 5=high all other low & in rows R1 and R7 low all other rows remain high to display Complete text graphic “E”

Anode of LEDs Connected with Columns and cathode connected with rows so positive logic is for columns and negative logic for rows.

"E" Display on 7x5 Dot matrix:

7x5 Dot matrix Circuit:

MikroC Programming Code: