OnStep

Vixen SXD Mount Converted To STM32 OnStep

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After nine months of modifying the OnStep open source telescope controller to run on the cheap STM32 ARM Cortex M3 microcontroller, it is time to reap the fruits of this long labour: I have an OnStep powered mount ...

Back in mid December 2017, I submitted to Howard the Hardware Abstraction Layer (HAL) to enable ports of OnStep to additional platforms in a modular fashion with less effort. Before the STM32 was completed, HAL proved useful in supporting RAMPS, Arduino Due, and lately the ESP32.

OnStep Telescope Controller on Low Cost STM32

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Over the winter, I worked with Howard Dutton, the author of OnStep Telescope Controller, to make it work with the low cost STM32 ARM Cortex M3 microcontrollers. This involved writing a hardware abstraction layer (HAL), so adding different architectures in the future would not be too hard, as it was.

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