Content originally posted in LPCWare by mohitm on Sat Jan 18 05:29:42 MST 2014
Hi
I am using LPC1778 for a robotic application. I wish to use uart 1 and uart 4 for communicating with external devices. I have dma based transmission enabled on both uart. But since they share the same dma request line (line 12 ) the transmission of both uart is getting corrupted when they are used simultaneously. Same problem is not observed when using uart0 and uart1. Is this the expected behavior ? Apart from using different uart instead of uart4 which will require us to make a new hardware is there a possible solution for this.
