Saturday, August 27, 2016
Saturday, June 11, 2016
Having received an early LimeSDR courtesy of Lime Micro, thanks to Andrew Back and Ebrahim Bushehri, I wanted to see if I could get it working with some of the code I had been developing specifically for the Raspberry Pi 3 with a 7 inch touch screen and HPSDR compatible radios.
The first job was to put the LimeSDR into a small case to protect it.
Thursday, May 05, 2016
Odyssey SDR transceiver
A problem had been found trying to use my Android software with the Odyssey transceiver developed by David Fainitski so he offered to loan me one to help find the bug.
The problem was that the start command being sent to the HPSDR device should be 64 bytes long and there was a typo in my code so the buffer was 84 bytes. The HPSDR devices were obviously not checking the packet length so were processing the start message. David's code was more strict so was discarding the message and as a result would not send any I/Q or mic data to the client.
I was able to run some tests using an Odyssey SDR transceiver using both the Android application and my new piHPSDR code. The piHPSDR code was correct so did work with no problems with Odyssey.
The discovery process detects Odyssey as a Hermes device.
When started it ran perfectly as can be seen from the screen dump below.
I have to complement David on the Odyssey. It is a very small package and is well built.
Thursday, April 07, 2016
Raspberry Pi Update
Good progress is being made with the Raspberry Pi. I now have a Raspberry Pi 3 as well as the 2 and also the official Raspberry Pi 7 inch touch screen.
This is a screen dump of the latest UI. The code now supports 4 rotary encoders and 8 switches.
The latest version of WDSP has now been ported over to Linux and some of the new features have been implemented in the UI including the panadapter detector and averaging functions.
I have had good signal reports on the air and several mentions of good audio, which is mostly thanks to the wdsp code.
Running at 96000 I am seeing the following when running "top -H -p
Still more work to do, but progress is going well.
Saturday, January 02, 2016
Pi 2 CPU Utilization
This screen shot was taken while running at 48000 sample per second, using an Orion v1 board (as is currently in the ANAN-200D) with Alex filters. Currently there is no PA attached. The Orion is running the new Ethernet protocol.
The Raspberry Pi 2 is being over clocked at 1GHz and has a 5 inch LCD touch screen attached with a resolution of 800x480 and a 600 ppt optical encoder for tuning. It is all enclosed in a small aluminium enclosure. I have also included a DC-DC converter to supply the 5 volts for the Raspberry Pi 2 from the 13.8v supply.
Monday, December 21, 2015
Raspberry Pi 2
- Broadcom BCM2836 ARMv7 Quad Core Processor powered Single Board Computer running at 900MHz
- 1GB RAM so you can now run bigger and more powerful applications
The RPi is running Raspian Linux and is capable of running up to 96000 samples per second with no problems when the RPi is over clocked to 1GHz.
The software I am running is based on the code for ghpsdr but is implementing the new Ethernet protocol and has a different UI interface built, but still using GTK+.
The latest source code for wdsp has been ported, although currently not all the newer features are implemented.
A short video is available on YouTube.
The source code is not yet available, but will be soon along with instructions on how to install the software and drivers required for the screen and rotary encoder.