Unable to access UART0 for device MKE04Z64VLH4 using Kinetis SDK and KExx_drv_lib v1.3.0

[zg]

I am using KDS v3.0.0 and the KExx_DRV_LIB v1.3.0 to develop an application for the MKE04Z64VLH4.  I am using a PEMicro USB Multilink Universal debugger. I have successfully added the additional memory-mapped peripherals and ports for this device.  Basic port testing works just fine.  However, any attempt to access UART0 (even a memory read of the status register) causes an interrupt and essentially halts the program.  As far as I can tell, no interrupts have been defined or enabled, all interrupts point to the "Default Handler".  Running the same code on a FRDM-KE04 evaluation board works just fine.  Also, running the simple "baremetal" example for the FRMD_KE04 that uses UART0 fails in exactly the same way.

Any suggestions on what to try next?  Why would a memory read of the UART0 memory location trigger an interrupt?

[zg · Accepted solution]

The root cause of this problem was found to be in the ConsoleIO component.  Changing to the AsynchroSerial component worked fine and has resolved the issue.

[zg]

I have created a small Processor Expert project which exhibits the problem on my client's board.  I have attached a screenshot of the failure.  Any suggestions are appreciated.

[Alice_Yang]

Hi Zachary,

Does your chip is MKE04Z64VLH4 ? If yes , please change the "CPU type":

then have a try , recommend you first send one char to the terminal , if still can not work,

please use the oscilloscope to check the TX pin whether have signal .

Hope it helps

Alice

[zg]

Alice - thanks for your suggestions.  I downloaded and installed the KSDK1.3 and it does not seem to directly support the MKE04Z64VLH4 when using the New Project Wizard.  As for the FRMD_KE04 board itself, it never exhibits the problem.  The problem only occurs on my client's custom board, so I'm not sure you can reproduce the problem.  However I will try and send you the project in case you see something wrong.  My next step is to create a PE project (which does appear to support the MKE04Z64VLH4).  I will post an update when I have some more information.  Thanks for your help.

BR

Zack

[Alice_Yang]

Hello Zachary,

About this "running the simple "baremetal" example for the FRMD_KE04 that uses UART0 fails in exactly the same way",

could you please test one under the KSDK1.3 about the UART0.

And also you can send the project on FRDM-KE04 to me , i will check it on my side .

BR

Alice