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Prusa-Firmware-MMU
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Alex Voinea d7301b8d58 Adjust PWM_FREQ to allow lower current regulation 
With PWM_FREQ=2 (fPWM = 2/512 fclk), the idler parked current was quite high since the setting was not actually respected (scientifically tested using hand). In order to allow lower current regulation in stealthchop, TBL and PWM_FREQ need to be adjusted. The lower both of these values, the better. Since TBL affects both stealthchop and spreadcycle, I chose to only modify PWM_FREQ.
This new PWM_FREQ results in half the previous stealthchop PWM frequency and also halves the low current limit (so if previously the minimum achievable current was 300mA, now it would be 150mA). I confirmed that this setting works correctly on a 24V supply. There is no audible noise from stealthChop PWM and the hold current is indeed reduced now (again, scientifically tested using my hand).
 		2022-10-20 12:09:42 +02:00
.vscode Update vscode to avr-gcc 2022-07-27 17:04:52 +02:00
cmake cmake: Uniform Avr toolchain build with MK3 2022-10-17 17:26:08 +02:00
lib USB cdc stdout stream 2021-10-14 14:27:56 +02:00
src Adjust PWM_FREQ to allow lower current regulation 2022-10-20 12:09:42 +02:00
tests user input test: Register enum with Catch 2022-10-17 17:27:47 +02:00
utils Update Jenkins rules to match updated cmake/ninja versions 2022-07-27 17:04:52 +02:00
.clang-format Disable preprocessor code indentation 2021-07-07 16:33:03 +02:00
.cmake-format.py Prepare parts of the build system 2021-04-19 07:03:47 +02:00
.gitignore Prepare parts of the build system 2021-04-19 07:03:47 +02:00
.pre-commit-config.yaml hooks: Update cmake-format to 0.6.13 2022-10-10 11:50:05 +02:00
CMakeLists.txt build: Set -mrelax to remove trampolines while linking 2022-10-17 17:22:21 +02:00
Doxyfile Update doxyfile + document modules namespace 2021-06-30 07:39:31 +02:00
README.md README: Mention the correct output filename 2022-07-27 17:04:52 +02:00
version.cmake Increase version to 2.1.4 2022-10-12 07:45:21 +02:00

README.md

Prusa-Firmware-MMU-Private

How to prepare build env and tools

Run ./utils/bootstrap.py

bootstrap.py will now download all the "missing" dependencies into the .dependencies folder:

  • clang-format-9.0.0-noext
  • cmake-3.22.5
  • ninja-1.10.2
  • avr-gcc-7.3.0

How to build the preliminary project so far:

Now the process is the same as in the Buddy Firmware:

./utils/build.py

builds the firmware.hex in build/mmu_release

In case you'd like to build the project directly via cmake you can use an approach like this:

mkdir build
cd build
cmake .. -G Ninja -DCMAKE_TOOLCHAIN_FILE=../cmake/AvrGcc.cmake
ninja

It will produce a MMU2SR_<version>.hex file.