Is it impossible to use TWI and SPI together on nrf52810?

RE: Is it impossible to use TWI and SPI together on nrf52810?

Shahar — Thu, 23 Dec 2021 19:04:32 GMT

Are you using a nRF52 (nRF52832) DevKit in nRF52810 emulation? or an actual nRF52810?

If in emulation, check to see if there's an oversight on the instance id when in emulation mode.

Try with selecting 0 and 1 for the instance ID

donghu kim — Thu, 23 Dec 2021 18:58:58 GMT

That's right. The spi and twi instances are set to zero.

First of all, I need to make sure the cause of the problem is clear.

I haven't found out whether the circuit is a problem or my code is a problem yet.

It was very helpful just to make sure that there was no problem using twi and spi together.

Thank you for your help.

Shahar — Thu, 23 Dec 2021 18:40:50 GMT

Did you enable the SPIM instance in the sdk_config?

In other MCUs (like the nRF52840) the TWI0/SPI0 for example share the same address, so you need to use different instance IDs.

But in the nRF52810, as there's only 1 of each (SPI0, TWI0, UARTE0) - each has its own address, so use the same instance ID for each instance

static const nrfx_spim_t m_spim0 = NRFX_SPIM_INSTANCE(0);
static const nrfx_twim_t m_twim0 = NRFX_TWIM_INSTANCE(0);