Sample applications for LED 8x16 Matrix Module For Raspberry Pi based on MAX7219 driving two LED 8x8 modules (8x16)

Tested with "Led Matrix LED Red Matrix Module Driver Board Lattice Led For Raspberry Pi" from icstation.com: http://www.icstation.com/matrix-matrix-module-driver-board-lattice-raspberry-p-7274.html

• Plug LED red matrix module on Raspberrry Pi and turn on the boards
• Enable SPI, easiest way on Raspbian is using raspi-config: https://www.raspberrypi.org/documentation/configuration/raspi-config.md
• Verify that SPI has been enabled
• Ensure that the SPI kernel driver is enabled:

$ dmesg | grep spi
[    3.769841] bcm2708_spi bcm2708_spi.0: master is unqueued, this is deprecated
[    3.793364] bcm2708_spi bcm2708_spi.0: SPI Controller at 0x20204000 (irq 80)

• Verify that devices are successfully installed in /dev:

$ ls -l /dev/spi*
crw------- 1 root root 153, 0 Jan  1  1970 /dev/spidev0.0
crw------- 1 root root 153, 1 Jan  1  1970 /dev/spidev0.1

Follow the steps below to run the Python example:

• Install https://github.com/rm-hull/max7219
• Run Python script as root:

sudo python python/matrix-cpu.py

Follow the steps below to build and run the C example:

• Install C library for Broadcom BCM 2835 as used in Raspberry Pi: http://www.airspayce.com/mikem/bcm2835/
• Build and run the example:

cd c
make 
sudo ./led-max7219-text hello