=====QRP Labs - QCX firmware upgrade with USBTinyISP=====

Using a USBTinyISP to update the QRP Labs QCX transceiver's firmware. 

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====Requirements====
  * USBTinyISP with 6 pin cable.
  * A built and working QCX tranceiver. Website: [[http://qrp-labs.com/qcx.html]]
  * QCX Firmware [[https://www.qrp-labs.com/qcx/qcxfirmware.html]].
  * Connect a dummy load.

====USBTinyISP UDev rule====
  * Add the following line into file: /etc/udev/rules.d/99-USBtiny<code>
SUBSYSTEM=="usb", ATTR{idVendor}=="1781", ATTR{idProduct}=="0c9f", GROUP="plugdev", MODE="0660"</code>
  * Plug in the USBTinyISP (or reconnect).
  * Test the connection without connecting to the QCX yet:<code>avrdude -c usbtiny -p atmega328p


avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.


avrdude done.  Thank you.
</code>

====Connection diagram====
  * Connect the transceiver using the pinout below:<code>

pinout USBTinyISP
+------------+
|  miso  vcc |
 ] sck   mosi|
|  rst   gnd |
+------------+

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

</code>

====Programming====
  * Test connection:<code>sudo avrdude -p atmega328p -c usbtiny -p atmega328p

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f (probably m328p)

avrdude: safemode: Fuses OK (E:FC, H:D1, L:D7)

avrdude done.  Thank you.
</code>
  * Program latest firmware:<code>sudo avrdude -p atmega328p -c usbtiny -U flash:w:T1.07.hex

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f (probably m328p)
avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed
         To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "T1.07.hex"
avrdude: input file T1.07.hex auto detected as Intel Hex
avrdude: writing flash (32760 bytes):

Writing | ################################################## | 100% 39.15s

avrdude: 32760 bytes of flash written
avrdude: verifying flash memory against T1.07.hex:
avrdude: load data flash data from input file T1.07.hex:
avrdude: input file T1.07.hex auto detected as Intel Hex
avrdude: input file T1.07.hex contains 32760 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 29.58s

avrdude: verifying ...
avrdude: 32760 bytes of flash verified

avrdude: safemode: Fuses OK (E:FC, H:D1, L:D7)

avrdude done.  Thank you.

</code>




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