I am using WindRiver JTAG Debugger to debug my code.
Whenever I run the code with Debugger connected, Code works correctly but If I disconnect it, It fails to even Start!
Has anyone faced such kind of Problems?
Electronic – Code Running from Debugger but Not Without it
debuggingjtag
Related Solutions
It depends on the kind of jtag interface that you have. In my experience, what I've noticed (happens on MSP430 and Atmel.ARM7TDMI) is that when you have watches on variables or breakpoints, or even any kind of control via the debugger, the core is halted periodically to run the boundary scan and all that. This will mess quite extensively with timing. If you have a free timer available, I'd suggest using its interrupt to toggle a pin every few microseconds and see whether this is happening and to what degree. Minimizing the number of breakpoints and watches may help, butI can't be sure of that. In fact, I have a feeling itll be target and IDE dependent also.
Timing issues such as this (RAM access) I'd suggest you investigate with an oscilloscope instead. Jtag is better used with slower events, algorithms, and places where the code can be safely halted.
I assume you are using code composer and you should(Keil uvision is a other good option). When you must select in the Flash button's arrow the "debug" option(little insect icon).
Than when you are going to Flash your MCU a interface will open showing the register and where you can track variable values.
Regards, MathieuL.
Best Answer
My debugger for a Coldfire does some initialization of the SDRAM controller and other low-level registers that is normally done by the bootloader. Check to see how your debugger initializes the chip.