How to use one SPI instance in two source files

How to use one SPI instance in two source fileshttps://devzone.nordicsemi.com/f/nordic-q-a/54359/how-to-use-one-spi-instance-in-two-source-filesHello I have both mai.c and app_sdcard.c "static const nrf_drv_spi_t spi = SPI_INSTANCE (spi_instance);" Want to use . So using "extern" main.c app_sdcard.c app_sdcard.h And wrote the code. But in app_sdcard.h "multiple storageen-USTelligent Community 13Fri, 15 Nov 2019 07:54:49 GMTRE: How to use one SPI instance in two source fileshttps://devzone.nordicsemi.com/thread/220223?ContentTypeID=1Fri, 15 Nov 2019 07:54:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d3efe61a-058c-4104-b503-c615a9f84ccay001<p>int -> const</p><div style="clear:both;"></div>