CircuitPython version
Adafruit CircuitPython 8.1.0-alpha
Adafruit ItsyBitsy M4 Express with samd51g19
Code/REPL
display_bus.send(42, struct.pack(">hh", 0, 239))
display_bus.send(43, struct.pack(">hh", 80, 319))
display_bus.send(44, gif.bitmap)Behavior
When sending a large SPI transfer the transfer is truncated. @jepler found reference in the samd51 spec that the block transfer count size in DMA is limited to a 16 bit value which implies the maximum is 64Kb. No error message is raised.
Description
Would be most useful to have the code detect and send larger transfers without the user seeing. Looks like you can chain transfer descriptors together to handle this situation.
Additional information
No response
CircuitPython version
Code/REPL
Behavior
When sending a large SPI transfer the transfer is truncated. @jepler found reference in the samd51 spec that the block transfer count size in DMA is limited to a 16 bit value which implies the maximum is 64Kb. No error message is raised.
Description
Would be most useful to have the code detect and send larger transfers without the user seeing. Looks like you can chain transfer descriptors together to handle this situation.
Additional information
No response