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free-pdk / easy-pdk-programmer-software

Easy PDK programmer for PADAUK microcontroller
https://free-pdk.github.io/
GNU General Public License v3.0
113 stars 38 forks source link

Adapting Firmware to STM32F042C6Tx #63

Open iDoka opened 2 years ago

iDoka commented 2 years ago

Due to chip shortage, especially apply to STM32 family would be great to have possibility to use functional and pin-to-pin substitution for STM32F072C8Tx. The most appropriate candidate is STM32F042C6Tx (with good availability in my area).

So, fast look on schematic can't find any specific features that can have only F072, perhaps F042 also can be used at functional level - only rebuild FW for F042 required.

Is it possible to use the STM32F042C6Tx instead of the STM32F072C8Tx? If so, can I ask to build FW also for F042? 🙏🏻

LovelyA72 commented 2 years ago

The essential component that F042 lacks is the DAC module, which FreePDK programmer use to produce the correct flashing voltage.

cnlohr commented 2 years ago

That shouldn't be an issue. the 042 has really versatile PWMs, Would just need to add an RC to the inputs of U3

cnlohr commented 2 years ago

I've just done a lot of projects with the 042 and have found it to be very versatile, convenient, and more convenient to procure chip for various projects. Always been a proponent of it.