Alternative Firmware for WS-DMX-xCH BAN LED Controllers
Features
This firmware adds some features that the original firmware is missing.
- Increase led refresh rate to 400hz (up from 200hz)
- Master control channel to scale the brightness of all leds
- Strobe channel (2hz to 40hz) with a flash length of 10ms
- Individual control of each led
- Set dmx adress using dip switch
- Flicker power led to indicate correct dmx signal reception.
Planned Features
- Implement a random strobe
- Different dimming curves
- Maybe implement some static effects
- increase code readability without decreasing performance
- increase performance of the main loop
Supported controllers
Support for others will follow as soon as I get my hands on them.
DMX Channels
| Ch |
Function |
| 1 |
Master intensity |
| 2 |
Strobe 2hz to 40hz |
| 3 |
Led 1 intensity |
| 4 |
Led 2 intensity |
| 5 |
Led 3 intensity |
| 6 |
Led 4 intensity |
| 7 |
Led 5 intensity |
| 8 |
Led 6 intensity |
| 9 |
Led 7 intensity |
| 10 |
Led 8 intensity |
State of the Code
The code is a bit messy, lots of external variables are used.
Some code has been unrolled to increase performance.
Some code is in locations that it logically shouldn't be in for performance reasons.
Compiling and Flashing
Dependencies
sudo apt install sdcc
pip3 install stcgal
Compiling
mkdir build
cd build
cmake -DCMAKE_TOOLCHAIN_FILE=../sdcc.toolchain ..
Flashing
The STC15W404s can be programmed using a standard usb-serial adapter.
I am using FTDI FT232 but any other adapter should work as well.
- Set the FT232 to 3.3V
- Connect RX/TX/GND from FT232 adapter according to the pinout image. Do not connect VCC!
- Connect external power supply to the board
- start flashing using the following command
stcgal -P stc15 -p /dev/ttyUSB0 dmx.ihx
- turn on the board
- DMX needs to be disconnected for flashing to work.
- Flasher TX needs to be disconnected for dmx to work.
- Flasher RX/GND can stay connected while dmx is received. This is nice for debugging.
Similar Projects
https://github.com/regnarg/ws-dmx-ban-hf-pwm/ -- implements a 32khz pwm on the WS-DMX-BAN-4CH-V3 board.
License
This code is released under the gplv3. If you require a different license please contact me.