112 lines
3.4 KiB
Markdown
112 lines
3.4 KiB
Markdown
This firmware is for the spark strober, using an [STM32 F1 series micro-controller](http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1031).
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project
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=======
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summary
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-------
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The spark strober switches mains electricity.
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This allows to switch on a flood light or stroboscope for a short time to create a light pulse.
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technology
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----------
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components:
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- [blue pill](https://wiki.cuvoodoo.info/doku.php?id=stm32f1xx#blue_pill), based on a STM32F103C8T6: development board to control everything
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- HLK-PM01 power module: 100-240V AC to 5V DC power supply to power the board and other peripherals (protected with a 0.25A glass fuse)
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- VS1838b: 38 kHz infrared demodulator to receive the codes from a remote control (connected using a 3.5 mm TRS jack)
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- G3MB-202P: compact 240V AC 2A solid state relay to switch mains electricity (protected with a 2A fuse)
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- infrared remote control sending NEC codes (low power version salvages from a multimedia player, high power version from Jedi iDual)
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connections
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===========
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Hi-Link HLK-PM01:
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- AC: 100-240V AC mains
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- +Vo: 5V
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- -Vo: ground
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Omron G3MB-202P:
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- 1: 100-240V AC mains line input
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- 2: 100-240V AC mains line output
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- 3: 5V with 330 Ohm resistor
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- 4: blue pill, PB6
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VS1838b:
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- 1, OUT: 3.5 mm TRS jack plug, ring
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- 2, GND: ground
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- 3, VCC: 5V (with 100 nF decoupling capacitor)
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3.5 mm TRS jack socket:
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- tip: 5V
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- ring: blue pill, PB8, TIM4_CH3
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- sleeve: ground
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blue pill:
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- PB8, TIM4_CH3: IR demodulator OUT
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- PB6: SSR control
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- 5V: 5V
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- GND: ground
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code
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====
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control
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-------
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Have a look at the `application.c` *ir_action* to changes the AC on/off switch animations and corresponding remote control code.
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dependencies
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------------
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The source code uses the [libopencm3](http://libopencm3.org/) library.
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The projects is already a git submodules.
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It will be initialized when compiling the firmware.
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Alternatively you can run once: `git submodule init` and `git submodule update`.
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firmware
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--------
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To compile the firmware run `rake`.
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documentation
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-------------
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To generate doxygen documentation run `rake doc`.
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flash
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-----
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There are two firmware images: `bootloader` and `application`.
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The `bootloader` image allows to flash the `application` over USB using the DFU protocol.
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The `bootloader` is started first and immediately jumps to the `application` if it is valid and the DFU mode is not forced (i.e. by pressing the user button on the board or requesting a DFU detach in the `application`).
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The `application` image is the main application and is implemented in `application.c`.
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It is up to the application to advertise USB DFU support (i.e. as does the provided USB CDC ACM example).
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The `bootlaoder` image will be flashed using SWD (Serial Wire Debug).
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For that you need an SWD adapter.
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The `Makefile` uses a Black Magic Probe (per default), or a ST-Link V2 along OpenOCD software.
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To flash the `booltoader` using SWD run `rake flash_booloader`.
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Once the `bootloader` is flashed it is possible to flash the `application` over USB using the DFU protocol by running `rake flash`.
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To force the bootloader to start the DFU mode press the user button or short a pin, depending on the board.
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It is also possible to flash the `application` image using SWD by running `rake flash_application`.
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debug
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-----
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SWD also allows to debug the code running on the micro-controller using GDB.
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To start the debugging session run `rake debug`.
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USB
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---
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The firmware offers serial communication over USART1 and USB (using the CDC ACM device class).
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