TWIS SDA and SDL can not be pulled low by TWI master

RE: TWIS SDA and SDL can not be pulled low by TWI master

spuhlele — Tue, 21 Jan 2020 08:42:39 GMT

Thank you very much for your quick answer, it solved my problem.

The configuration I had wrong was having set:

NRF_GPIO_PIN_S0S1

instead of:

[quote userid="6207" url="~/f/nordic-q-a/56748/twis-sda-and-sdl-can-not-be-pulled-low-by-twi-master/229901"]NRF_GPIO_PIN_S0D1[/quote]

Now it works as desired.

Susheel Nuguru — Mon, 20 Jan 2020 14:37:14 GMT

I do not see anything else in the configuration apart from the GPIO configuration before enabling the TWIS.

Try to set both the pins to below configuration before enabling the TWIS

NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_CONNECT, NRF_GPIO_PIN_PULLUP, \

NRF_GPIO_PIN_S0D1, NRF_GPIO_PIN_NOSENSE)