Posted on May 17, 2011 at 13:39Found the problem and wanted to close it out here. We're doing RS-485, using DMA for both transmit and receive, and performing collision detection. Following a collision the TX DMA count register was not being reinitia...
Posted on May 17, 2011 at 13:39Part of this problem appears to be related to a break condition on the serial lines. The behavior of what happens when a break condition occurs during a DMA transfer is something of a mystery.
Posted on May 17, 2011 at 13:39Thanks for the responses. The code loads the DMA buffer and then kicks off the DMA transfer. When the transfer is complete DMA is disabled and the USART TC interrupt is then enabled. The purpose of this is to chain eve...
