jal@ee.rochester.edu (John Lefor) (10/04/89)
I am trying to send values back and forth between the DSP and the 68030 (using C). In version 0.9 I had things working just fine using DSPPutTX and DSPGetRX, now in version 1.0 things seem to have changed. I looked at dsp_example_2 as an example of simple communication between the DSP and the 68030. In this I find a DSP routine called PutSamp which uses the DSP's host interface to send a value to the 68030. There is a corresponding C routine called get_result which is called when msg_receive returns with an appropriate message type. All this is fine. I made some simple modifications to the two routines to try to communicate more than one value between the DSP and the 68030. Simply in the DSP routine I coded two calls to the PutSamp routine (each call sending a different value). I then modified get_result so that the global variable "done" is never changed. This keeps the loop which calls msg_receive running forever. After these modifications I continue to get the first value from the DSP, but the 68030 never seems to get a second value. Is there anyone who can help me with this? I'll be glad to speak on the phone, send code samples or anything that might help clarify my problems. Thanks. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - I program ... therefore I am. John Lefor University of Rochester Dept of E. Engineering 716-275-8265 jal@ee.rochester.edu uunet!ur-valhalla!jal