NRF52 PWM Sequence idle State

RE: NRF52 PWM Sequence idle State

elangel — Mon, 07 Oct 2019 06:59:25 GMT

Thank you so much.

i tried so much in the sequence. I had to add 0xFF because, without 0xFF the sequence didn't stop. But i didn't try to add a 0x8000 for the last 16 bit.

RE: NRF52 PWM Sequence idle State

elangel — Mon, 07 Oct 2019 06:45:45 GMT

yes, i know.

But that just change the polarity in the sequence. between the sequences its still HIGH.

RE: NRF52 PWM Sequence idle State

hmolesworth — Thu, 03 Oct 2019 01:03:24 GMT

Edit: The last 16-bit value in the DMA table is 0x0000 (ie 0xFF 32-bit, which is interpreted as 0x00FF followed by 0x0000). In the code above that leaves the port pin high. As Sigurd suggests, change the 0xFF to 0x800000FF which leaves the last 16-bit value 0x8000 and the port pin low.

RE: NRF52 PWM Sequence idle State

Sigurd — Wed, 02 Oct 2019 16:22:03 GMT

Hi,

The the most significant bit[15] in the sequence (seq0_ram) sets the polarity. See this and this link.