multiple definition of `SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQHandler

[Shreya J B]

Hi,

I am using sdk 16.0 and I am already using 3 SPI Instances i.e. SPI1, SPI2, SPI3. I wanted to use SPI0 Instance also. How to use it?

If enable SPI0 in sdk_config I am getting "multiple definition of `SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQHandler " this error.

Please help me to solve this issue.

Thank you,

Shreya

[Simonr]

Hi Shreya

Then likely this instance is already used for something else. The SPI0 instance share its peripheral address with TWI0, so if TWI0 is used already, that would make the SPI0 busy and return a value like this.

You can also search your project for the multiple defined handler to see where it is defined other than in your SPI0.

Best regards,

Simon

[Shreya J B]

Hi Simonr,

Yes TWI0 is already used. Thank you for the information. 

[hmolesworth]

When short of SPIM (or other) peripherals it is possible to reuse a single SPIM for multiple external devices and save pins as well by optionally sharing MISO, MOSI and SCK pins. Time sharing is required, and the EGU provides a simple way of enforcing such non-overlapping usage of the SPIM. I wrote a simple example for this; note power management has to be added to the EGU handlers in cases where the SPIM transfer takes significant CPU bandwidth, but that may not be necessary.

timing-of-spi-when-sharing-common-lines