Skip to content

Latest commit

 

History

History
114 lines (88 loc) · 3.61 KB

HARDWARE.md

File metadata and controls

114 lines (88 loc) · 3.61 KB
Raw

The box

The box

Parts of a box

See the pictures in pictures/box.

  • Power supply
  • Fan
  • USB controller board (Arduino Nano)
  • USB power outlets
  • USB Hubs

A RPi3 module

RPi module

See the pictures in pictures/rpi.

Wiring a RPi with a Mini module

Power and Ground.

  • Alternative: USB bus powered
    • GND: CN2-2 to RPi pin 14
    • VCC: CN3-1 to CN3-3 (VBUS to VCC)
  • Alternative: Self-powered
    • CN3-2 (GND) to RPi pin 6 (GND)
    • CN3-3 (VCC/PWR) to RPi pin 4 (5V)
    • DON'T CONNECT CN3-1 (VBUS)

IO and chip power (3.3V to VCCIO).

  • CN2-1 (3V3) to CN2-11 (VIO)
  • CN2-3 to CN2-21 (not strictly required, but nice to have)
  • CN2-5 to CN3-12 (not strictly required, but nice to have)

UART (TX/RX to RPi).

  • RPi-TX : CN3-25 (BD1) to 8 (GPIO14/TXD0)
  • RPi-RX : CN3-26 (BD0) to 10 (GPIO15/RXD0)

JTAG (Mini module to RPi).

  • RPi to RPi: 1 (V3V3) to 15 (GPIO22/ARM_TRST)
  • unconnected: 16 (GPIO23/ARM_RTCK)
  • CN2-9 (AD2) to 18 (Gpio24/ARM_TDO)
  • CN2-7 (AD0) to 22 (Gpio25/ARM_TCK)
  • CN2-10 (AD1) to 37 (Gpio26/ARM_TDI)
  • CN2-12 (AD3) to 13 (Gpio27/ARM_TMS)

Prepare SD card with latest firmware files (enables network boot on every RPi until "3+" and contains bugfixes)

From {EMBEXP-BOX}/tools/firmware/boot_{thelatest}, take the file bootcode.bin and copy it on an empty FAT32 formatted SD card.

Flash EEPROM of RPi 4 and configure it to enable network boot

TODO: add configured EEPROM image in tools/firmware/custom/rpi4_eeprom/... TODO: clean up the following notes

  1. Standard EEPROM update 
    sudo apt update
sudo apt full-upgrade
sudo apt install rpi-eeprom

sudo apt update
sudo apt upgrade
sudo apt install rpi-eeprom

sudo rpi-update

# Enable beta releases in the standard update process
sudo echo FIRMWARE_RELEASE_STATUS="beta" > /etc/default/rpi-eeprom-update

sudo systemctl mask rpi-eeprom-update
  2. Configure EEPROM 
    cp /lib/firmware/raspberrypi/bootloader/beta/pieeprom-2019-10-16.bin pieeprom.bin
rpi-eeprom-config pieeprom.bin > bootconf.txt

nano bootconf.txt
############
BOOT_UART=1
BOOT_ORDER=0x21
#probably not needed:
TFTP_PREFIX=0
############

rpi-eeprom-config --out pieeprom-netboot.bin --config bootconf.txt pieeprom.bin

sudo rpi-eeprom-update -d -f ./pieeprom-netboot.bin
sudo reboot

vcgencmd bootloader_config
vcgencmd bootloader_version

Cabling of a RPi module

  • Power - micro USB
  • Reset - jumper cable gnd and rst, rst with resistor in series (3,9 k ohm)
  • UART/JTAG - mini USB
  • Ethernet - patch cable

An LPC11C24 board (LPCXpresso with CMSIS DAP)

The board does not connect to the serial port of the processor by default. One has to either connect it with an external module or connect it using small resistors on the board. For the latter option, see the pictures in pictures/lpc11c24.

An Arty-A7 board

Arty-A7 board

Writing the flash memory without Vivado

This is not strictly needed at the moment, but it can be useful for later.

# note: it takes about 3 minutes to write and then 2 minutes to verify
interface/fpgaprog.py box3 arty_a7_100t_0 arty_a7_100t_riscv_freedom_e300/E300ArtyDevKitFPGAChip --to_flash

Cabling of an Arty-A7 board

  • Power/FPGA-JTAG/UART - micro USB
  • JTAG - mini USB (JTAG wiring, see https://www.digikey.com/eewiki/display/LOGIC/Digilent+Arty+A7+with+Xilinx+Artix-7+Implementing+SiFive+FE310+RISC-V)