raspberrypi-spi

Tiny spi loopback test for the rpi

Run on a fresh rpi

Prerequisites: ssh-able rpi running raspbian

1. Install raspbian https://downloads.raspberrypi.org/raspbian_lite_latest
2. ssh to the rpi
3. Install docker curl -sSL https://get.docker.com | sh
4. Add docker-compose sudo apt-get install docker-compose
5. Enable spi: uncomment the line dtparam=spi=on in /boot/config.txt
6. Optionally also modprobe spi-bcm28355 for the module to be enabled immediately
7. Test: lsmod | grep spi, output should look like

spidev                 16384  6
spi_bcm2835            16384  0

8. Put spi in loopback mode by shorting GPIO pins 9 and 10
9. Clone this repo sudo apt-get install -y git && git clone https://github.com/avishayp/raspberrypi-spi
10. Run the test cd raspberrypi-spi && docker-compose up
11. Expected output:

spi_1  | spi mode: 0
spi_1  | bits per word: 8
spi_1  | max speed: 500000 Hz (500 KHz)
spi_1  |
spi_1  | FF FF FF FF FF FF
spi_1  | 40 00 00 00 00 95
spi_1  | FF FF FF FF FF FF
spi_1  | FF FF FF FF FF FF
spi_1  | FF FF FF FF FF FF
spi_1  | DE AD BE EF BA AD
spi_1  | F0 0D