EnableIRQ returns PPI error

[David Woosley]

Hello. After a couple of s210 and s310 projects, I am attempting an s120 project. I built a client SDK but sd_nvic_EnableIRQ returns error code 0x2009 or NRF_ERROR_SOC_PPI_INVALID_GROUP. What can be done? Thank you.

// Initialize SoftDevice.
err_code = sd_softdevice_enable(clock_source, softdevice_assertion_handler);
if (err_code != NRF_SUCCESS)
{
    return err_code;
}

m_softdevice_enabled = true;

// Enable BLE event interrupt (interrupt priority has already been set by the stack).
return sd_nvic_EnableIRQ(SWI2_IRQn);

[Ulrich Myhre]

Hi!

If you haven't configured any PPI channels, then you migth be compiling against the wrong header files for the currently flashed SoftDevice.

If you are setting up PPI channels, make sure to read the chapter 10.4 in the S120-SDS [PDF warning] where the limitations of PPIs are listed