ChibiOS Free Embedded RTOS

I used chibiOS 3.0.0 on STM32F4-Discovery,
Add USB-CDC works OK, then I add SPI driver my USB-CDC stop enumerating

I think issue on spiExchange,

spiExchange(&SPID1,1,NULL,rxbuf);

When I comment SpiExchange(), USB-CDC work again.
Any Suggestions?

Arif,

Hi,

You cannot pass NULL there, use spiReceive() if you don't need to send data.

Giovanni