MicroPython Forum (Archive)

Answering my own question...almost.


Will thrash it out properly...

Robert, have I got this right? To keep the DMA going forever all I have to do is top up the trans count regularly?

def dma_topup(chan:int, nword:int):
dma=ptr32(uint(DMA_BASE) + chan * 0x40)
dma[TRANS_COUNT] = nword

edit: using a circular buffer.
RING_SEL = const(1)
RING_SIZE = const(0b1111)

Using yesterdays micropython build I retried some I2C code and it ran all night. 12 hours and it's still running. Woo Hoo!