14. Send_receive_padma_continuous

14.1. Function description:

This demo is send_receive_padma_continuous, test with two groups of USARTn. In this demo, the USARTn_TX is configured as DMA mode and the USART1_RX is configured as DMA mode. Through IO connection, the data will be sent through USARTn_TX and received by USART1_RX.The data will be sent 4 times in a row to turn off dma Continuous interrupt, compare the data after a delay of 1ms, and then continue the above operation to compare the data again.

14.2. Test result:

This dmo show USARTn_TX send data, USART1_RX receive data, if USARTn_TX send data equals USART1_RX receive data, print “pass”,if not, print “fail”.

14.3. IO connection:

PAD	PAD
pad_USARTn_TX_DMA	pad_USART1_RX_DMA

Note

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