WARNING

This application currently requires a patch to the Flipper exports to make it work as a FAP ...An issue has been raised: https://github.com/flipperdevices/flipperzero-firmware/issues/1747 ...It has been acknowledged on Discord, and expected to be resolved before FAP v1.0 is officially released.

WORKAROUND:

• EITHER: edit firmware/targets/f7/api_symbols.csv and:
  • for calloc change:
    • Function,-,calloc,void*,"size_t, size_t" to
    • Function,+,calloc,void*,"size_t, size_t"
  • for LL_TIM_DeInit change:
    • Function,-,LL_TIM_DeInit,ErrorStatus,TIM_TypeDef* to
    • Function,+,LL_TIM_DeInit,ErrorStatus,TIM_TypeDef*
• OR: paste these commands to edit the file inline
  • sed -i 's/\(Function,\)-\(,calloc,.*\)/\1+\2/' firmware/targets/f7/api_symbols.csv
  • sed -i 's/\(Function,\)-\(,LL_TIM_DeInit,.*\)/\1+\2/' firmware/targets/f7/api_symbols.csv
• THEN: Update the firmware on the Flipper
  • cd /path/to/flipper/
  • ./fbt flash_usb

To review the code as a PLUGIN, please see this checkin: https://github.com/csBlueChip/FlipperZero_plugin_PWM/tree/16ab64c8c9a840813aadf60583acc595b79793fb

FlipperZero PWM Demo (FAP)

This will allow you to configure a PWM timer {Frequency, Duty Cycle, Duty Scaling Curve} and attach it to a GPIO Pin.

You can currently select from:

• PB8 - Internal Speaker
• PB9 - Internal IR LED Array
• PB3 - External GPIO Pin

Internal LED, and Brightness scaling are currently not written.

cd ~/path/to/flipperDevKit/
mkdir -p applications_user/bc_pwm_demo
pushd applications_user/bc_pwm_demo
git clone https://github.com/csBlueChip/FlipperZero_plugin_PWM.git ./
popd
./fbt launch_app APPSRC=applications/bc_pwm_demo

More details here: https://github.com/csBlueChip/FlipperZero_plugin_howto