Hi I am a C programmer but not expert on porting micropython to new micros. I read the instructions and extract the library files from the last version at ST github. Please see the attached ZIP archive. I have a STM32-VL-Discovery development board, with a STM32F100RBT6B. I offer myself as beta-tester. Thanks, Massimo [STM32F1xx.zip](https://github.com/micropython/stm32lib/files/11347325/STM32F1xx.zip) [stm32vldiscovery-stm32-value-line-discovery-stmicroelectronics.pdf](https://github.com/micropython/stm32lib/files/11347330/stm32vldiscovery-stm32-value-line-discovery-stmicroelectronics.pdf [stm32f100rb.pdf](https://github.com/micropython/stm32lib/files/11347333/stm32f100rb.pdf) )
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dpgeorge commentedon Apr 28, 2023
Yes it's possible to support the STM32F1xx series, but I don't think it's worth doing, because they are old MCUs.
See this comment here, which discusses STM32F3xx: micropython/micropython#6955 (comment)