Resolve PWM config conflict on A15

adafruit / Adafruit_WICED_Arduino

Adafruit WICED Feather Arduino BSP

https://www.adafruit.com/products/3056

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Resolve PWM config conflict on A15 #32

Closed microbuilder closed 8 years ago

microbuilder commented 8 years ago

There is a conflict with the PWM output on A15 (TS_CH1), possibly caused by SPI3_CS (HW CS for SPI slave mode). The CS slave pin may or may not be the problem, though.

This pin is not used as CS on the SPI flash connected to SPI3, but the HW/Slave CS functionality may be getting configured or set by the multiplexer with the SPI flash code.

In any case, the config or multiplexing issue should be resolved to enable PWM on A15 again. Further investigation required.

hathach commented 8 years ago

some findings:

PWM on Timer 5,2,1 (PA1) has the same symptoms: only working after ~5minutes
PWM on Timer 3,4,8 : work just fine (all 16 bit timer)

Timer1 is 32 bit, there is possibly some wrong register config