topic another question on spi slave mode in MPC5xxx

another question on spi slave mode

lyk — Fri, 15 Sep 2017 07:48:54 GMT

Hello:

I have another question on spi slave mode:

if I use DSPI2 in slave mode, A3 as the chip select pin, how to config it?

should I not only config the MSCR[3] SSS value equal 0010,but also config IMCR[49] SSS value equal 0001?

Thank you!

PetrS — Mon, 18 Sep 2017 07:30:42 GMT

Hi,

to use A3 pin as slave's chip select input you need to set

SIUL2.MSCR[3].R = 0x000C0000; // Pad PA3: Enable input buffer and input hysteresis

SIUL2.IMCR[49].R = 0x1; // Pad PA3: is SPI_2 CS0

BR, Petr