13. Send_receive_padma_all

13.1. Function description:

This demo is send_receive_padma_all, test with two groups of USARTn. In this demo, the USARTn_TX_RX is configured as DMA mode and the USARTn_TX_RX is configured as DMA mode. Through IO connection, the data will be sent through USARTn_TX and received by USART1_RX.And data through USART1_TX and received by USARTn_RX.

13.2. Test result:

This dmo show USARTn_TX send data,USART1_RX receive data, if USARTn_TX send data equals’ {per1_inst}_RX receive data,or USART1_TX send data equals USARTn_RX receive data. print “pass”,if not, print “fail”.

13.3. IO connection:

PAD	PAD
pad_USARTn_TX_DMA	pad_USART1_RX_DMA
pad_USARTn_RX_DMA	pad_USART1_TX_DMA

Note

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