TMS320C6678的SPI_EDMA回环测试程序，使用CSL库编写的程序，里面可能使用pdk6670的相关库函数，但是可以作为参考-TMS320C6678 of SPI_EDMA loopback test procedures, programs written using the CSL library, which may be related to the use of library functions pdk6670, but can be used as reference