Multiple Instances of SPI doesn't seem to be working.

[Rajat]

Hi Everyone

I am trying to use 2 instances of SPI SPI0 AND SPI2 for Epaper Display and MCP2515 CAN bus module respectively. 

Epaper and CAN are working fine if one of them is run. However if i run both of them , only one of the Peripherals work either CAN or the EPAPER.

What can be the possible reason for this behaviour.

I am suing SDK 15.0 with S140 Softdevice on Segger Embedded Studio on NRF52840.

Thanks 

Rajat!

[Rajat]

The pins for Epaper and Can bus Module are entirely different
(Just in case it helps )

[Rajat]

Also 

I am using SPI instance 0 for Epaper 

SPI Instance 2 for CAN

TWI instance 1 for an I2C Sensor (Because SPI and TWI are shared resources, if i am not wrong)

[Rajat]

Except the CS pin , all other pins are same. Now i changed 

[Rajat]

On a logic analyzer on epaper pins , it shows me that "The inital idle state of clk line does not match the settings"

[Kenneth]

Hi,

Have you checked that the SPI instances (0 and 2) you are using are not overlapping with other peripherals you may have enabled:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.ps/memory.html?cp=2_0_0_3_1_3#topic 

Are you able to replicate this by simply extending the SDK example to use instance 0 and 2?
Try \nRF5_SDK_15.2.0_9412b96\nRF5_SDK_15.2.0_9412b96\examples\peripheral\spi\

E.g. in main.c add:
static const nrf_drv_spi_t spi2 = NRF_DRV_SPI_INSTANCE(2); /**< SPI instance 2. */ // #define SPI2_ENABLED 1 in sdk_config.h

Best regards,
Kenneth