Code Execution Issue - C28 Cycle Accurate Simulator Bug?

stevenh

Guru 20045 points

Hello,

I am having a code execution issue when running my code in the cycle accurate simulator (I haven't yet tried to see what happens on the actual uP).

The if statement in the code shown below doesn't work as expected, i.e. If I2Cresult != I2C_NOT_IDLE, setting of result to EEPROM_FAILURE should be skipped. However, its not working that way. the debugger, executes the result = EEPROM_FAILURE when I2Cresult doesn't equal I2C_NOT_IDLE.

Is this a simulator issue?

I also included a snapshot of expressions, disassembly and CPU registers

Stephen

over 12 years ago

0 AartiG over 12 years ago

TI__Guru**** 173310 points

The MOVB instruction is a conditional instruction whose outcome depends on the 3rd operand which is the condition. So although it appears incorrect, the execution itself should be correct. If you continue to step through your code you should be able to verify that the code is executing correctly.

Please see this related thread for a similar situation.

0 stevenh over 12 years ago in reply to AartiG

Guru 20045 points

Hello AartiG,

Thanks for the reply.

I've modified the code since my initial post. I'll change it back and get back with you on the results.

What concerned me is that I was almost sure the result was getting set to EEPROM_FAILURE.

Stephen

0 stevenh over 12 years ago in reply to AartiG

Guru 20045 points

Hello AartiG,

result was eqaul to EEPROM_FAILURE because I had already set result to EEPROM_FAILURE at the top of the function (not shown in the image).

Thanks,
Stephen

0 AartiG over 12 years ago in reply to stevenh

TI__Guru**** 173310 points

So the code is executing as expected, correct?

0 stevenh over 12 years ago in reply to AartiG

Guru 20045 points

Yes.

Thanks,

Stephen

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Code Execution Issue - C28 Cycle Accurate Simulator Bug?