This document describes how to configure a Raspberry Pi 3 (Raspi) to program the lattice ice40HX8K fpga board from olimex (Oli).
Sources:
[2] Using a Raspberry Pi as a JTAG Dongle
[4] Schematic olimex iCE40HX9K-EVB
- format sd card with [sd memory card formatter] (https://www.sdcard.org/downloads/formatter_4/) 2.Download the NOOBS zip file, extract and put content on sd card
- Insert card and boot raspberry pi 3
- Login -> Default username: pi, password: raspberry
- Enable ssh -> sudo raspi-config -> interface options -> enable ssh
- Enable spi -> sudo raspi-config -> interface options -> enable spi
The Raspi is powered with a 5V Micro USB cable The Oli is powered with a dedicated 5V power supply (alternatively the Olimex can be powered from the 5V of the Raspi)
The Grounds of the two boards need to be connected. See SPI.
We have to connect the following pins for SPI. Grounds are connected via this SPI connector.
Raspi Connector: J8
Oli Connector: PGM1
| Raspi pin name/num | Oli pin name/num |
|---|---|
| SCK / 23 | SCK / 9 |
| MISO / 21 | SDI / 7 |
| MOSI / 19 | SDO / 8 |
| CE0 / 24 | SS_B / 10 |
| GPIO25 / 22 | CDONE / 5 |
| GND / 20 | GND / 2 |
| GPIO24 / 18 | CRESET / 6 |
We have to connect the following pins for JTAG. Reset is not unused.
Raspi Connector: J8
Oli Connector: GPIO1
| Raspi pin name/num | Oli pin name/num |
|---|---|
| TCK / 35 | TCK / 31 |
| TMS / 36 | TMS / 32 |
| TDI / 37 | TDI / 33 |
| TDO / 38 | TDO / 34 |
| RST / 40 | optional |
UART can be used to talk to the FPGA.
Raspi Connector: J8
Oli Connector: GPIO1
| Raspi pin name/num | Oli pin name/num |
|---|---|
| Tx / 8 | Rx / e.g. 28 |
| Rx / 10 | Tx / e.g. 27 |
For installing the tools run the script:
sh install.sh
To prgram the FPGA run the script:
program.sh programming_file.bin
The programming file can be generated with the yosys suite, see also SpinalDev).
To start the openocd server run:
openocd.sh
JTAG can be used to program and debug software (see for example SpinalDev)
Make sure uart is enabled in the configuration (sudo raspi-config) and mincom is installed (sudo apt-get install minicom). Now access of uart may be done with:
minicom -b 115200 -o -D /dev/ttyAMA0