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Hello, I have a problem using ISD51 to debug my code. AT first, I used the simulator to run my code and it works fine. Then I added ISD51.A51 into my project and also added ISDinit() and ISDcheck() to my code, changed the OPTION menu to enable ISD51 and compiled. The problem is that the code doesn't start running after loading (seems waiting). Can anyone help with it? Another thing: during compiling, I saw there were a few bytes overlap in code space. Does it matter? Thanks Frank ------------------------------------------- compiling LOG.C... compiling test.c... assembling Conf_tny.a51... assembling STARTUP.A51... assembling ISD51.A51... linking... *** WARNING L5: CODE SPACE MEMORY OVERLAP FROM: 0023H TO: 0025H Program Size: data=68.3 xdata=454 code=16180 creating hex file from ".\output\snake"... ".\output\snake" - 0 Error(s), 1 Warning(s).
Your code is simple enough. The only GUESS I would make right now is that you are having serial communications problems such as noisy line, bad DSR/DTR connection, or a baud mismatch. The two different error messages would support that, tending to indicate different data being observed across different attempts. But you say you can communicate with your processor via HyperTerminal, so that is odd. Did you say that you have seen the microprocesssor successfully send data to the PC via the UART? (When you send an 0xA5 to the application, it sends back 6 bytes which appear in HyperTerminal?)
Maybe some sort of Baudrate problem. I also guess that you have a problem with the COM interface between PC and hardware.
What I tested is that using the Hyperterminal with ISD51 undefined in IDE, from the source code above, you can see my board should send back any character I typed in the Hyperterminal windows. It did well.
I just tried the ISD51 code downloaded into my board using the Hyperterminal. I pressed the ALT + 0,1,6,5 (A5), then I got 4 characters in the Hyperterminal window from my board my every time. Does it sound correct?
Are you sure it's 6 characters, not 4 characters?
Frank, that sounds okay. Since Hyperterminal does not show hex values, only characters, all 6 characters may not appear to be there on the screen. Anyway, it sounds like you definitely have communication through the port, since ISD51 seems to have recognized your 0xA5. I think you've eliminated all the obvious issues. Let's see if anybody else has a new guess on this one. It has to be something simple.
Thanks. Now I'm guessing probably the Keil software has a ISD51 bug with the processor C515C, not sure in some DLLs or interface with the serial port. I asked my parter in Switzerland, who developed the board, about debugging the board using ISD51. They told me they failed and couldn't get it working. I'm just experiencing the same problem as them.