LPC MicrocontrollersのトピックDMA question https://community.nxp.com/t5/LPC-Microcontrollers/DMA-question/m-p/546310#M13234 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by schisanoa on Wed Oct 01 07:15:10 MST 2014</STRONG><BR /><SPAN>Hi</SPAN><BR /><BR /><SPAN>I would understand what is the best way to use DMA for the UART RX. I need to receive data at high data rate, about 921600 or more, and I would use the DMA to optimize the firmware, but I don't have a fixed lenght for data, so if I set a transfer for each single byte I suppose it will be not useful, and not optimized, but if I set a transfer size for the DMA of 256 byte, if I receive less than 256 byte, the DMA interrupt won't be asserted. How you may manage this problem? Any suggestion?</SPAN><BR /><BR /><SPAN>I use a FreeRTOS, maybe&nbsp; using a queue with a timeout?</SPAN><BR /><BR /><SPAN>Thanks</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:31:02 GMT lpcware 2016-06-15T18:31:02Z DMA question https://community.nxp.com/t5/LPC-Microcontrollers/DMA-question/m-p/546310#M13234 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by schisanoa on Wed Oct 01 07:15:10 MST 2014</STRONG><BR /><SPAN>Hi</SPAN><BR /><BR /><SPAN>I would understand what is the best way to use DMA for the UART RX. I need to receive data at high data rate, about 921600 or more, and I would use the DMA to optimize the firmware, but I don't have a fixed lenght for data, so if I set a transfer for each single byte I suppose it will be not useful, and not optimized, but if I set a transfer size for the DMA of 256 byte, if I receive less than 256 byte, the DMA interrupt won't be asserted. How you may manage this problem? Any suggestion?</SPAN><BR /><BR /><SPAN>I use a FreeRTOS, maybe&nbsp; using a queue with a timeout?</SPAN><BR /><BR /><SPAN>Thanks</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:31:02 GMT https://community.nxp.com/t5/LPC-Microcontrollers/DMA-question/m-p/546310#M13234 lpcware 2016-06-15T18:31:02Z