=====QRP Labs - QCX firmware upgrade with Raspberry Pi=====

**<color #ed1c24>I now use the: [[qcx_firmware_usbtinyisp|USBTinyISP]] method.</color>**

Using a Raspberry Pi board as AVR programmer to update the QRP Labs QCX transceiver's firmware. The power draw from the QCX to the RPi seemed a bit too much, so I did not use the RPi 5v output.

{{::img_2158.jpg?nolink&600|}} \\
//Photo of older version firmware, i'm now at v1.05.//

{{::img_2155.jpg?nolink&600|}}

====Requirements====
  * Raspberry Pi (I used a 3 model B+ board from 2017).
  * Raspbian (based on Debian Buster). Using ''/boot/ssh'' and ''/boot/wpa_supplicant.conf'' for headless install.
  * A built and working QCX tranceiver. Website: [[http://qrp-labs.com/qcx.html]]
  * Jumper wires.
  * QCX Firmware [[https://www.qrp-labs.com/qcx/qcxfirmware.html]].
  * **Connect a dummy load! I did see a unit going into transmit when connected to the RPi, during flashing transmit was off. I haven't investigated how and why this happens.**

====Configure raspbian====

  * Enable spi in ''/boot/config.txt'' and reboot: <code>dtparam=spi=on</code>
  * Install avrdude:<code>sudo apt install avrdude</code>

====Wiring====

<code>

Raspberry Pi
=========================================
            (Right board edge)
                   |
               1 oo|2
               3 oo|4
               5 oo|6
               7 oo|8
               9 oo|10
              11 oo|12
              13 oo|14
              15 oo|16
              17 oo|18
BCM 10 MOSI - 19 oo|20
BCM  9 MISO - 21 oo|22 BCM 25 RESET
BCM 11 SCLK - 23 oo|24
        GND - 25 oo|26
<snip>




QCX
=========================================

(left board edge)
      | V -
      | V +
      |
  GND | o o RESET
 MOSI | o o SCK
   5V | o o MISO


</code>

====Programming====
  * Check connection:<code>sudo avrdude -p atmega328p -c linuxspi -P /dev/spidev0.0 -v -b19200</code>
  * Program latest firmware:<code>sudo avrdude -p atmega328p -c linuxspi -P /dev/spidev0.0 -v -b19200 -U flash:w:T1.04.hex</code>




{{tag>[hardware qrp labs qcx avr avrdude]}}