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usart_dma_rb_transfer

Overview

The usart dma ring buffer example shows how to use usart driver with DMA driver used:

In this example, a ring buffer was implemented to receive the characters from PC side, to implemente the ring buffer, a descriptor was created and chain itself as the next descriptor, then the DMA transfer will start a continuous transfer.

While data in the ring buffer reach 8 characters, routine will send them out using DMA mode.

Supported Boards

• LPCXpresso51U68

• LPCXpresso54628

• LPCXpresso54S018

• LPCXpresso54S018M