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SPI slave using USART-1 in interrupt mode

Question asked by rhodes.keith on Aug 25, 2016
Latest reply on Aug 26, 2016 by Clive One
We are using a STM32F205 CPU in our own board design. We are configuring the USART-1 as a SPI slave with the proper AF functions.

We have the NSS pin configured as hardware mode.

With this configuration, does the NSS signal disable the SCK signal inside the SPI so that the bytes received only generate an interrupt when the NSS signal is low?

What we want is if the NSS signal is high, no interrupts occur in the SPI.

Thanks...Keith Rhodes

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