topic Re: LPC1763 UART DMA Issue in Other NXP Products https://community.nxp.com/t5/Other-NXP-Products/LPC1763-UART-DMA-Issue/m-p/1009420#M8519 <HTML><HEAD></HEAD><BODY><P>Hi, Balakrishnan,</P><P></P><P>If you transmit a character repeatedly for example 'A' via DMA mode, then use a scope or logic analyzer to test the TX pin of uart, you can confirm if the DMA transmitted character correctly.</P><P>You can post the code so that we can have a review.</P><P>BR</P><P>XiangJun Rong</P></BODY></HTML> Wed, 25 Mar 2020 07:22:38 GMT xiangjun_rong 2020-03-25T07:22:38Z LPC1763 UART DMA Issue https://community.nxp.com/t5/Other-NXP-Products/LPC1763-UART-DMA-Issue/m-p/1009419#M8518 <HTML><HEAD></HEAD><BODY><P>I am using LPC1763. Already verified the UART operation on my product. Now needs to use DMA for UART, especially UART0. Based on the&nbsp;example code provided by NXP, upated my source code. While I transmit data through UART0 by using DMA, I am not getting the expected data at the receive side of the other device. I am only receiving the value 0xFF. My message packet contains 0xFF as a first byte, maybe I am receiving only one byte data in the other side. Verified the transfer size set in the register, everything looks fine. Also to mention I am getting DMA interrupt for every Tx.</P></BODY></HTML> Tue, 24 Mar 2020 13:48:03 GMT https://community.nxp.com/t5/Other-NXP-Products/LPC1763-UART-DMA-Issue/m-p/1009419#M8518 balakrishnan_ch 2020-03-24T13:48:03Z Re: LPC1763 UART DMA Issue https://community.nxp.com/t5/Other-NXP-Products/LPC1763-UART-DMA-Issue/m-p/1009420#M8519 <HTML><HEAD></HEAD><BODY><P>Hi, Balakrishnan,</P><P></P><P>If you transmit a character repeatedly for example 'A' via DMA mode, then use a scope or logic analyzer to test the TX pin of uart, you can confirm if the DMA transmitted character correctly.</P><P>You can post the code so that we can have a review.</P><P>BR</P><P>XiangJun Rong</P></BODY></HTML> Wed, 25 Mar 2020 07:22:38 GMT https://community.nxp.com/t5/Other-NXP-Products/LPC1763-UART-DMA-Issue/m-p/1009420#M8519 xiangjun_rong 2020-03-25T07:22:38Z