topic Re: mqx for hello_twrpxs20 error in MQX Software Solutions

mqx for hello_twrpxs20 error

Sendzimir — Thu, 01 Nov 2012 13:16:56 GMT

The PXS20 processor core is dual e200z4d, but why the "hello" example of mqx for twrpxs20 import "libc_E200z650.a" and "librt_E200z650.a".

As shown below:

Re: mqx for hello_twrpxs20 error

Martin_ — Mon, 05 Nov 2012 07:46:10 GMT

Hello,

yes, it should be linked against e200z4 libc and librt, primarily due to e200z4 core dual issue hardware.

e200z650 is single issue. If an executable is linked with e200z6 libraries, the code will work on PXS20 because the e200z4 instruction set is compatible with e200z6. However, e200z4 libraries are built with compiler support for dual issue - means the compiler should generate more optimized code for dual issue hardware. We will fix MQX PXS20 projects for this.

Re: mqx for hello_twrpxs20 error

Martin_ — Mon, 05 Nov 2012 13:14:37 GMT

A colleague reminded me that currently MQX supports PXS20 in BookE. As there is no e200z4 BookE version of CW EWL library (for e200z4, CodeWarrior has VLE mode only), MQX link the only CodeWarrior BookE library available and that is e200z6.

CodeWarrior Power Architecture e200 compiler supports dual issue by command line option -pragma schedule. You can compile your PXS20 application source files with command line option -pragma "schedule z750" to optimize resulting instructions for dual issue.

Re: mqx for hello_twrpxs20 error

Sendzimir — Tue, 13 Nov 2012 14:35:11 GMT

There is another error. Codewarrior 10.2 chinese edition has bug. When I make a new file or import, pop-up dialog box like this.

I change Codewarrior language to english by add " -nl en" on the property of Codewarrior , when I saw this post(https://community.freescale.com/thread/114388) yesterday.

Then the problem has solved.

Re: mqx for hello_twrpxs20 error

c0170 — Tue, 13 Nov 2012 16:04:16 GMT

Hello Sendzimir,

could you report this bug in CW section. This is not MQX related. Thank you.

Regards,

MartinK