Install wiringpi to get the gpio command:
apt install wiringpi
There are five LEDs on the front. The indicate which subsystems work.
- An error occurred
- Test Error
- Test Error
- Test Error
- Tester is IDLE (also, tester is READY)
LEDs 2, 3, and 4 form a pattern that indicate which test failed:
| Test name | 2 (Green) | 3 (Blue) | 4 (White) | Component | Reason for Failure |
|---|---|---|---|---|---|
| SPI Valid | x | x | U4, U2, U1 | The SPI flash was not found, or was not the correct model | |
| USB Communication | x | U1, U2, U3, U7, U5 | The FPGA isn't assembled correctly, the USB pullup isn't correct, or the crystal is bad | ||
| Load Test Bitstream | U5 | The FPGA isn't assembled correctly | |||
| Test SPI | x | PCB | Not all four wires are connected between the FPGA and the SPI | ||
| Test RGB | x | x | U5, U10 | TOUCH2 or the RGB LED are not assembled correctly | |
| Test Touch | x | x | U5 | TOUCH1, TOUCH3, or TOUCH4 are not assembled correctly | |
| Final Bitstream | x | U5, U4 | The final program could not be loaded |
Connect TOUCH1, TOUCH3, and TOUCH4 together. Connect TOUCH2 to a light sensor board.
Cut a USB cable in half and connect 5V, GND, USB_DN and USB_DP to the cable. Plug this cable into the Raspberry Pi.
Finally, use the following wiring diagram to attach the jig to the Raspberry Pi:
