Remote control in VHDL, which fits on a Lattice icestick. The whole design flow was done using open source tools. It was tested with a Panasonic TX-49FXW654 and can be extended for other devices and protocols.
- gui: Contains a python script to provide control signals to the FPGA.
- hdl: Contains the toplevel hardware design as well as the infrared encoder and sampler code.
- sim: Contains a few automated tests and scripts for manual tests.
- submodules: Contains icestick-uart, which is used to communicate with the icestick.
- syn: Contains the scripts and constraints for synthesis and following steps.
To process the VHDL code and finally flash the generated bitstream on the device, the open source toolchain was used. This includes ghdl, ghdl-yosys-plugin, yosys, nextpnr and icestorm. Further information about the tools can be found at the linked pages. There are also prepared docker container, including all the mentioned tools. For more information, see https://github.com/ghdl/docker respectively https://github.com/hdl/containers.
- Create the bitstream and flash the icestick:
cd syn && make && make load - Send control signals to the icestick, which get encoded and sent via the infrared LED:
cd gui && ./remote_gui.py - New codes can be obtained by pressing the "Start sampling" button at the "Sample" tab.
| resource | absolute usage | relative usage |
|---|---|---|
| ICESTORM_LC | 474/ 1280 | 37% |
| ICESTORM_RAM | 2/ 16 | 12% |
| SB_IO | 11/ 112 | 9% |
| SB_GB | 4/ 8 | 50% |
| ICESTORM_PLL | 0/ 1 | 0% |
| SB_WARMBOOT | 0/ 1 | 0% |
Panasonic remotes use the Kaseikyo protocol. Other Panasonic devices may use different codes, which can be extended. Since the Kaseikyo protocol uses pulse distance coding, other protocols with the same encoding technique could be added trivially. The NEC protocol is one of them and can be activated via generic. However, it wasn't tested.
Useful links:
- https://www.vishay.com/docs/81288/tfdu4101.pdf
- https://www.mikrocontroller.net/articles/IRMP#KASEIKYO
- https://www.mikrocontroller.net/attachment/4246/IR-Protokolle_Diplomarbeit.pdf
- https://www.roboternetz.de/phpBB2/files/entwicklung_und_realisierung_einer_universalinfrarotfernbedienung_mit_timerfunktionen.pdf
- http://www.hifi-remote.com/wiki/index.php/Panasonic
- https://github.com/ukw100/IRMP/blob/master/src/irmpprotocols.h