Kinetis Software Development Kit中的主题 Re: FSL UART Driver in Blocking Mode with MQX

FSL UART Driver in Blocking Mode with MQX

tomtalkington — Mon, 04 Jan 2016 23:47:48 GMT

I am using the FSL UART Driver in blocking mode with MQX as the RTOS. When the IRQ posts to the rxIrqSync semaphore a hard fault is generated. Have spent three days troubleshooting this problem and have run out of ideas as to what to try next. The _lwsem_post code executes to the _CHECK_RUN_SCHEDULER() function where the hard fault occurs.

Any troubleshooting suggestions would be greatly appreciated.

Thanks,

Tom

Re: FSL UART Driver in Blocking Mode with MQX

xiangjun_rong — Tue, 05 Jan 2016 08:00:07 GMT

Hi, Tom,

If your application is confidential or complex, can you develop a simple example which can duplicate the issue and attach your simple example project here so that we can test on our board. I have installed KDS, CW and IAR tools.

It is difficult to estimate the root cause without debugging. In general, when you access a memory which is out of range or you access a peripheral register whose clock is disabled..., the hardware fault will happen.

XiangJun Rong

Re: FSL UART Driver in Blocking Mode with MQX

tomtalkington — Thu, 02 Jun 2016 00:53:33 GMT

After posting this I saw similar posts rewarding this issue which were also unanswered. In my case I ditched MQX and went to FreeRTOS and now with the same code I no longer have the issue.