rp2040 check for available pio instruction memory #381
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Strip did not work when rp2040 was used and the object was created with the constructor with parameters. (Output pin must be configured as output before the SM is started!)
…constructor Call of the rp2040Init() is moved to the setPin method.
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Hi All,
On the RP2040(W) the class caused a PANIC when I tried to use it together with another library that was also using the PIO. I initialized the other library first and it happened to use all of the instruction memory of pio0. The original code just checked for available SM, but not for pio memory.
I changed the rp2040 init code to check for available memory first on pio0, if that fails then it tries to load the pio program to pio1's memory and if that also fails then the raspberry SDK throws PANIC.
I also added clean up code to the destructor to free the pio resources.
This is a compatible change and effects only the rp2040 devices.
Probably already known limitation:
With the current pio program one rp2040 can only handle 8 Neopixel strips and the pio program is going to be loaded separately for each instance.