How to handle data transfer when SPI is set to host?

* Question

How to handle data transfer when SPI is set to host?


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Answer

1 Set the SPCCR register to get the corresponding SPI clock.

2 Set the SPCR register to control the SPI as the host.

3 Control the chip select signal and select the slave.

4 The data to be sent is written to the SPDR register, which initiates the SPI data transfer.

5 Read the SPSR register and wait for the SPIF bit.


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