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README.md

Pluto+

The repo maintain the firmware of Pluto+. Pluto+ is a software-defined radio platform that supports 2TX 2RX, supports Gigabit Ethernet and Micro SD card. The design inherited from the well-known ADI ADALM-PLUTO with several improvements.

[TOC]

Specification

Feature Details
SOC Zynq7zc010 with 28k LUTs
ADC/DAC AD9363(Can hack to AD9361 or AD9364) with 2 Transmit, 2 Receive channel
RF Range 70MHZ~6GHZ
Ref Clock VCTCXO 40MHZ 0.5ppm, with external clock input
RAM 512MB
FLASH 32MB, SD Card
Connections USB：2.0 support OTG
Ethernet：1Gb
DC IN 5V +-0.5V-2A microUSB

Front

Back

Schematics

Pluto+ has full schematics open sourced. You can find this in sch folder.

How to upgrade the firmware

UDisk Upgrade

  1. You can download the latest firmware from here
  2. Unzip the files
  3. Put *.frm files into the storage disk named "PlutoSDR"

DFU Upgrade

If you device is not responding anymore, you have to apply DFU procedure to unbrick it.

  1. Download the firmware and unzip it.

  2. Install dfu utility

  3. Make Device enter DFU mode. There is a howto section below on the details steps.

  4. Run DFU utility with the following command:

    dfu-tool -a 0 -write boot.dfu
dfu-tool -a 1 -write pluto.dfu

How to build firmware manually

  1. Clone this repo
  2. Download the source code via 'git submodule update --init'
  3. Apply the diff to each subfolder 
    cd plutosdr-fw
git apply ../patches/fw.diff

cd hdl
git apply ../../hdl.diff
cd ..

cd linux
git apply ../../linux.diff
cd ..

cd u-boot-xlnx
git apply ../../u-boot-xlnx.diff
cd ..
  4. Build the code via 'make' in plutosdr-fw folder

In case you hit the error, please search the internet on PlutoSDR firmware build. It is identical.

Jumpers and Pinouts

There is description on PCB on the jumpers.

Jumpers

Please note that all IO levels are 1.8V.

  1. When using the official ADI-PlutoSDR firmware, please connect to URST-MI052.
  2. When using Pluto+ firmware and need to support Ethernet, please connect URST-MIO46
  3. When using SD card to boot, please connect SD-H to 1V8
  4. When using JTAG to debug, please connect JTAG# to GND
  5. Please connect EXCLK to GND when using external reference clock input

HowTo

How to connect PTT

PTT drives optocouplers through GPIO0 (MI00), which requires an external relay or control circuit.

ptt_sch

ptt

How to Enter DFU

  1. Remove the screws and open up the device.
  2. Short URST with MIO52, see the Jumper images for details.
  3. Press DFU while power the device

img

How to have a external reference clock

You can connect a cable to input an external high-precision reference clock for AD9363 through the IPEX interface. The main level should not exceed 3.3V, and the EXCLK jumper needs to be connected to GND to turn off the built-in clock. (Check Jumper image for details)

img

img

How to Calibrate the OSC

The frequency of the 40M clock can be fine-tuned by adjusting the adjustable resistor next to the VCTCXO. You need to have a reference signal source and frequency meter when adjusting.

How to boot from SD Card

Connect SD-H jumper to 1V8. Check Jumper image for details. We don't have SD image yet. And we will support it later.