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Hello!
I tried the attached SPI slave program.
I get the following error message.

Error: Unresolved external function:'FC_CAL_SPI_Slave_RxByte_1(void)'
Error: Unresolved external symbol, function:FC_CAL_SPI_Slave_RxByte_1
failure
C:\Program Files\Flowcode 6\compilers\pic\boostc\boostlink_picmicro.exe reported error code -2

What is the problem?

Hi
Thanks for the report.
Sorry, we don't yet have SPI slave functionality implemented.
We put some skeleton code into the CAL in readiness, but it's quite a task for all the target versions, maybe we should have left it out!
The CAL is used by the SPI Master component, but we don't yet have an SPI Slave component.