d40_channel_execute_command
res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
res = d40_channel_execute_command(d40c, D40_DMA_RUN);
return d40_channel_execute_command(d40c, D40_DMA_RUN);
res = d40_channel_execute_command(d40c, D40_DMA_STOP);
ret = d40_channel_execute_command(d40c, D40_DMA_STOP);