Kinetis MicrocontrollersのトピックUnable to access UART0 for device MKE04Z64VLH4 using Kinetis SDK and KExx_drv_lib v1.3.0

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

zg — Thu, 17 Mar 2016 20:56:48 GMT

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?

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

Alice_Yang — Fri, 18 Mar 2016 01:49:12 GMT

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 .

Alice

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

zg — Tue, 22 Mar 2016 02:47:45 GMT

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.

Zack

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

zg — Fri, 25 Mar 2016 02:37:25 GMT

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.

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

Alice_Yang — Fri, 25 Mar 2016 03:48:59 GMT

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

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

zg — Wed, 06 Apr 2016 01:25:23 GMT

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.