Known issue list

[LANCO_M4]

Where can I get a detailed list of all known issues with different versions of MQX?

[ZhangJennie]

Hi LANCO,

MQX Known Issues and Limitations is documented in C:\Freescale\Freescale_MQX_4_0\doc\FSL_MQX_release_notes.pdf

please take a look of this file,

does this answer your question?

Have a great day,
Zhang Jun

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[RadekS]

MQX release notes up to version 4.0.2 contained also change log (what was changed from previous versions – since version 3.0.0).

Unfortunately this is not part of official documentation from version 4.1.0.

Therefore you need several release notes for full change log (in attachment).

We plan add separate document with change log at version 4.2.0 (current plan for release date is end of April 2015).

I hope it helps you

Have a great day,
RadekS

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[gfinlay56]

It would be much desired to have a sanitized MQX BSP and PSP device driver bug fix report (e.g. Bugzilla or JIRA or equivalent) which identifies fixed issues which Freescale customers for MQX should be aware. The release notes are just not a comprehensive coverage of all code changes and driver fixes. If in doubt, we try to compare the code between different versions of MQX as the ultimate source for potential bug fixes or improvements, but this is time consuming.

I suspect that there are a lot of device driver bug fixes labelled "ENGR00xxxxxx" or "MQX-nnnn" between MQX 3.8 and MQX 4.1 for Kinetis which are not included in the release notes, but are nonetheless very important for us since we need to continue using MQX 3.8 (until such time as the updated AR4100 Atheros stack from Qualcomm as well as the OTG version of the USB stack are released with MQX 4.1 or higher). We would like to understand what issues have been fixed so that we don't waste unnecessary time tracking down MQX bugs that have already been fixed in later versions.

A couple of good examples:

1. We wasted a lot of time trying to find out why our UART TX FIFO wasn't draining properly until we saw this email thread on the

    Freescale community forum which identified a known issue with the Kinetis MQX serial UART driver:

     https://community.freescale.com/message/478244#478244

     The serl_pol_kuart.c serial driver for Kinetis contained a problem with _kuart_polled_ioctl() for the

     IO_IOCTL_SERIAL_WAIT_FOR_TC command. In this case, there were missing parentheses to explicitly override

     the default operator precedence to make sure the bit mask "&" is done before the "!".

     Old code in MQX 3.8:

          while( !sci_ptr->S1 & UART_S1_TC_MASK )

             { };

     New code in MQX 4.1:

          while( ! ( sci_ptr->S1 & UART_S1_TC_MASK ) )

             { };

2. In MQX 4.1, the lwgpio driver contains a couple of fixes to the lwgpio driver from MQX 3.8.  There is nothing in the release notes identifying what issue this fixes!

   Old code in MQX 3.8 for lwgpio_set_value() (I suspect this is an issue with "write one to clear" register bits):

       if (out_value == LWGPIO_VALUE_LOW) {

           handle->gpio_ptr->PDOR &= ~handle->pinmask;

       }

       else if (out_value == LWGPIO_VALUE_HIGH) {

           handle->gpio_ptr->PDOR |= handle->pinmask;

       }

   New code in MQX 4.1 for lwgpio_set_value():

       if (out_value == LWGPIO_VALUE_LOW) {

           handle->gpio_ptr->PCOR = handle->pinmask;

       }

       else if (out_value == LWGPIO_VALUE_HIGH) {

           handle->gpio_ptr->PSOR = handle->pinmask;

       }

   Old code in MQX 3.8 for  lwgpio_int_init():

        handle->flags |= LWGPIO_INT_MODE(0x08 | mode & 0x07); /* see PCR_IRQC register field definition */

   New code in MQX 4.1 for  lwgpio_int_init()

        handle->flags |= LWGPIO_INT_MODE(0x08 | (mode & 0x07)); /* see PCR_IRQC register field definition */

Is there any possibility of getting a more comprehensive list of MQX BSP or PSP device driver fixes (including items not found in release notes)?

Regards,

Gord Finlay