michael fcd0f52e21 test(spi_master): add test case for 3 DMA issues with internal connection by gpio mux.
3 issues are:
1. RX buffer not aligned (start and end)
2. not setting rx_buffer
3. setting rx_length != length

also add spi release code here.
2017-09-27 10:44:28 +08:00
..