MQX4.2 gets to "_sched_ready_internal()", but does not rum my application. Why?

markkalior · ‎09-02-2015

I get no errors or warnings, for the BSP, PSP, and APP. The code downloads and starts with no errors or warnings.

Have based my application code on MQX\examples\spi\ (spi_twrk20d72m).

What am I missing?

soledad · ‎09-03-2015

Hello Mark,

Are you using a Freescale board? If this, please check the below warning:

• The default console interface (ttyb:) is routed to OSBDM-COM (USB mini connector). Use the P&E Microcomputer Systems OSJTAG terminal to access the board serial line.

• Because SCI1 module and SPI1 module share a pin PTE1, useTTYA as a terminal for the SPI1 module.

Could you please change the default console and use ttya?

Please let me know if this helps!

Have a great day,
Sol

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markkalior · ‎09-03-2015

No, I'm not using a Freescale board.

Perhaps, I am wrong, but I don't think this is a hardware problem. When I step through the MQX init, I see no errors, just MQX setting up an idle task, then starting the scheduler ("_sched_start_internal()"). The MQX doesn't crash. I believe the MQX is executing the idle task. Its behaving like there is no Application to execute.

I do have the normal "MQX_init_struct" as outlined in "MQX_User_Guide.pdf", page 34 and MQX/examples/SPI/main.c, so I am expecting the MQX to execute my Application Task, but when I set a breakpoint on my task the software doesn't hit the breakpoint.

Is there another step, that I am missing? Why would MQX ignor my Task? Linking problem?

soledad · ‎09-03-2015

Could you please confirm which MQX version and IDE are you using?

Regards

Sol

markkalior · ‎09-03-2015

MQX 4.2; IAR Embedded Workbench for ARM 7.40.1.8472

Freescale K20.

using JTAG debugger IAR Systems I-Jet.

soledad · ‎09-09-2015

Hello Mark,

Unfortunately I cannot reproduce the issue. I used the twrk20d72 IAR and MQX4.2. I can debug the example without issues.

Is it possible you can test using the twrk20d72 in order to rule out problems with the hardware?

Regards

Sol

markkalior · ‎09-09-2015

Thanks for looking into this.

I have subquently discovered a mistake on my part. I had intended to use an external crystal connected to XTAL0 and EXTAL0, but used the XTAL32 and EXTAL32 instead. So I have replaced the crystal with 32.768Khz crystal, in an effort to move forward. I have also changed the initialization code to run off the RTC crystal. It would seem the K20 does allow this setup.

Can I use RTC external crystal, 32.768Khz connected to XTAL32 and EXTAL32 to run the K20 and not use the XTAL0 and EXTAL0?

I intend to use the FEE mode, sense the PEE mode is unavalible. Is this a viable plan?

Also, the debugger is showing me most K20 Registers having the value 0xCDCDCDCD (MCG_xxx and RTC_xxxx). Its hard to believe that is correct value. Do you know what causes this behavior?

soledad · ‎09-14-2015

Hello Mark,

we will continue the support in the thread:

https://community.freescale.com/thread/373895

Have a great day,
Sol

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