5509 ASYNC Software UART with DDK | TMS320C55x

Technical discussions about the TI C55x DSPs (including the c5501, c5502, c5503, c5507, c5509, c5510 and OMAP5910).

Hello, I'm developing an app for the 5509 using the software uart in the DDK. I am using CCS 2.21.00 and DDK 1.1. I have 5509 silicon rev F. I can get the uart working an sync mode, but cannot get it to work in async mode. In the ddk documentation, it explains how a dma errata means that you will have problems with an odd number of bytes transferred, so I am sending data in "blocks" of 2 bytes to avoid this limitation. If I send a null pointer as the callback to ASYNC_read(), I can successfully read the second of 2 bytes. If I give it a suitable callback, I get nothing at all. The callback never gets called. Does anyone have a working code sample that uses the the ASYNC mode software uart on the 5509. Thanks for your time, ..... Paul

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5509 ASYNC Software UART with DDK - greenpaulshepherd - Sep 17 15:35:00 2003