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To Change Crystal Frequency to 20 MHz from default 25 MHz for a Custom board

Dinesh K M
Intellectual 380 points
Other Parts Discussed in Thread: TM4C129ENCPDT

Hi,

We have using the controller TM4C129ENCPDT for our product & EVK(TM4C1294XL) is used as a debugger(instead of JTAG).

We tried the following test code for evaluating the TI RTOS functionality but we have faced some exceptions(Debug port error) while executing this code.

The exception is attached here (refer Capture.png).

 

Test Scenario

***********

The sample code contains two static threads(test & echoFxn) and each thread printing the thread name using System printf.

Also a delay of 500 ms is provided after this print statement in each thread. The sample code(workspace) is also attached here(refer uartecho_EK_TM4C129EXL_TI_TivaTM4C129ENCPDT.zip).

 

As per our analysis we found that the exception is occurred while executing Task_sleep() statement.

Would you please help us to identify the root cause of this issue?

Another main observation about this issue is happened when we changed the crystal frequency from 25 MHZ to 20 MHz. The actual hardware crystal in Our board has 20 MHz only.

uartecho_EK_TM4C129EXL_TI_TivaTM4C129ENCPDT.zip

Regards,

Dinesh