Topic : DAC output buffer problem

Forum : ARM

Original Post
Post Information Post
December 12, 2012 - 11:48pm
Guest

The target CPU is STM32F103ZE. I was using DAC1 to output 800mv. And I have a 15k load. So I enabled the output buffer. When I used compiler Ride7 7.30.10 and Rkit for ARM 1.26.10, the output buffer for DAC1 works. When I updated to version Ride7 7.36.11 and Rkit for ARM 1.36.11, the output buffer enable stopped working. The output is 400mv because the output buffer can not be opened,I guess.
I also tried the latest version.It didn't work.
Replies
Post Information Post
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December 13, 2012 - 9:57am
Raisonance Support Team

Hi,

Did you update the ST lib files in your project?

The old ST lib contained some bugs that did not appear with the old compilers but that do cause problems with the new compilers. (because they optimize better, mostly)

Please make sure you are using the latest version of the ST library, from the ST website.

If the problem persists with the latest version, to help you more we will need to have a complete project that demonstrates the problem.

Best Regards,

Vincent
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December 13, 2012 - 5:24pm
Guest

I downloaded the newest libraries. It still shows 400mv.

How can I send the project to you?
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December 13, 2012 - 5:57pm
Raisonance Support Team

Hi,

Send it by email to , and include a link to this post in the text of the email.

Best Regards,

Vincent
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December 17, 2012 - 5:08pm
Guest

I have sent you the project by e-mail last week.
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December 17, 2012 - 5:38pm
Raisonance Support Team

Hello,

Thank you for the feedback.

We will look at your project.

However, we saw that your support contract has expired, so we cannot handle your problem as high priority.

Regards,

Etienne