When I was looking into microcontrollers with 32F103 peripherals, but with a RISCV-core, I ran the stm32f1xx HAL on them. The assumption was, their peripherals were the same. (Except USB). Using this on a GD32VF103, I was able to communicate with most I²C sensors I connected to the bus, but I ran into issues with…

When running some tests regarding delay loops in assembly, I ran across some differences in timing between a CKS32F103 and an STM32F103 based Blue Pill. This lead me to run some tests across my collection of 32F103 chips. All chips involved have implemented the cycle counter in the DWT. We will use this to determine…

Delaying a millisecond on a microcontroller. While, of course, we could use timer peripherals specific to our MCU, I’m looking for a more generic solution. On a Cortex M3 (or better) I’d check for the DWT, and if fitted, check whether it implements the cycle counter. However, on a Cortex M0 or (M0+) we have…

One of my goals these holidays were to design some new ucdev baseboards. I’m looking at the ESP32C3 and ESP32S3. Now, there are various boards on AliEbay, so which one to design for. When I bought some samples last March. Back then I went for the NodeMCU models. However, looking at AliEbay today, it seems…