Add alternate clock configurations for STM32#849
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garethky wants to merge 2 commits intoKalicoCrew:mainfrom
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Add alternate clock configurations for STM32#849garethky wants to merge 2 commits intoKalicoCrew:mainfrom
garethky wants to merge 2 commits intoKalicoCrew:mainfrom
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I'm doing all my ADS131M02 testing with the ALPS board that requires this to work. So its been tested to work with that. |
rogerlz
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May 5, 2026
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I think the inner shutdown calls here became dead code after the refactor?
The Mellow ALPS board needs PA3 to emit an 8Mhz signal to drive the ADS131M02's clock input. Unfortunatly this conflicts with klipper's primary timer, TIM2. This change adds an alternate timer function for pin PA3 to allow this pin to emit a clock signal without the conflict using times TIM15. Signed-off-by: Gareth Farrington <[email protected]>
Each pin has alternate timers. If the primary timer is being used or is already configured with a different time base by another pin, the alternate timer can be used instead. This loopes over the alternate configurations looking for a free timer to configure. Signed-off-by: Gareth Farrington <[email protected]>
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On the Mellow ALPS ADS131M02 board they used PA3 as the clock input pin to the ADC. In the existing chip config this pin is assigned to the same clock as klipper's main timer. This causes a conflict when trying to use the new
[static_pwm_clock]feature to set up that pin to cycle at 8Mhz.This PR introduces a new feature that can try multiple pins definitions in the config until it finds one that can be programmed successfully without a conflict. This means that the alternate timers for each pin can be added to the existing config. I add one such config for the ALPS board for PA3 that uses its alternate timer.
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