Hello, I now have a problem. When I use SPI communication in SDK under the freertos system, I find that when using blocking communication methods, such as spi_transfer_blocking, the program will die when it runs here, but the data accepted when using non-blocking mode is wrong. I don't know if there is a better way to do this application. What's going on? Or do you have any examples of spi communications under freertos, based on sdk 3.0? thank you.