2. Cpu_send_dma_receive

2.1. Function description:

This demo is CPU_send_dma_Receive, test with two groups of USARTn, configure TX as CPU_Send, Rx is configured as DMA_Receive, the configuration is as follows:

2.2. Test result:

This dmo show USARTn_TX and USARTm_TX send data,USARTn_RX and USARTm_RX receive data,if USARTn_TX send data equals USARTn_RX receive data or USARTm_TX send data equals USARTn_RX receive data, print “pass”,if not, print “fail”.

2.3. IO connection:

PAD	PAD
pad_USARTn_TX_CPU	pad_USARTm_RX_DMA
pad_USARTn_RX_DMA	pad_USARTm_TX_CPU

Note

The ‘m’ and ‘n’ in “usartm” and “usartn” indicate the peripheral number.