Beaglebone Black GPIO - 8x8 LED Matrix with C Program - Part1

I made an 8x8 LED matrix circuit to work with GPIO pins on Beaglebone Black.

STEP-1 : Make LED matrix board with the following circuit:

Components Required:
1. Breadboard PCB or General PCB - 01
2. 3mm RED LED's - 64
3. 330 Ohms Resistors - 08
4. Male/Female Header - 01
5. Male/Female Jumper wires - 16

Note: If you don't want to make circuit you can use a standard 8x8 dot matrix module buy from local electronic shops or buy online.

Beaglebone Black: Connect all ROWS to Port_8 on  Pins 11 to 18 and all COLUMNS to Port_8 pins 3 to 10 using Jumper wires.

This application is tested on Beaglebone Black running Angstrom OS

Note: To use these GPIO pins you need to disable onboard emmc and HDMI port. 

• Installing Beaglebone drives on Windows platform Refer adafruit.com
• Installing Beaglebone drives on Linux platform Refer adafruit.com
• Installing SSH client on windows download free BitviseSSHD or Go to: http://www.bitvise.com/ssh-client-download 
• SSH on Linux see adafruit.com 

STEP-2 :Disabling on-board emmc and HDMI port:

• Connect Beaglebone Black to PC with USB cable. wait for storage media to initialize.
• Go to My Computer and open "BEAGLEBONE" storage media.
• Navigate the file "uEnv.txt" and open in text editor.
• Paste this following line:  

 optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G 

• Save & Close the file, restart Beaglebone

                                                                                                See Part2 - To be Continued