[STM32F407] CS43L22 problem!

[hukhongcongtu26111993]

Posted on December 16, 2017 at 02:40

Hello!

I am working with CS43L22 on STM32F407VG Discovery Board.

I use Audio_playback_and_record example to play .wav file.

If i use headphone, I can get good sound. But If I use speaker I get small sound.

Is that normal?

#audio #cs43l22

[Imen.D]

Posted on December 18, 2017 at 15:14

Hello

quoc.anh

,

This can be caused by software configuration issue.

Weneed few more details on your software configuration about used speaker output.

Best Regards

Imen

[waclawek.jan]

Posted on December 18, 2017 at 15:34

Aren't the speaker outputs of CS43L22 unconnected on the STM32F407VG Discovery Board?

JW

[hukhongcongtu26111993]

Posted on December 19, 2017 at 05:29

Yes. I was consider STM32F407 Discovery schematic and CS43L22 Datasheet. You are right! Thanks you for your confirmation.

[hukhongcongtu26111993]

Posted on December 19, 2017 at 05:37

Now I can play wav file into my micro sd card. But I only can play 16bit wav file. I want to play 8bit wav file. How can I do that?

 If you need, I can upload my project ! I expect that you can help me !

[waclawek.jan]

Posted on December 19, 2017 at 08:04

I am not going to review your project and it's unlikely anybody will, but generally, you read 8-bit samples instead of 16-bit from the file, and then you have to shift them to the left by 8 ( << 8) before using them just like in the 16-bit case.

JW

[hukhongcongtu26111993]

Posted on December 19, 2017 at 09:51

How can I get 'stm32_audio_vocoders_package' ? I read this document 

http://www.st.com/content/ccc/resource/technical/document/application_note/2e/bf/40/8b/bf/e1/48/cf/DM00073742.pdf/files/DM00073742.pdf/jcr:content/translations/en.DM00073742.pdf

 

[Imen.D]

Posted on December 19, 2017 at 10:11

Hello

quoc.anh

,

As mentioned in the AN4229:'The vocoder firmware package is provided upon request, for more details please contact your local ST sales representative.'

So, you can contact a local ST sales representative from the list indicated at this

http://www.st.com/content/st_com/en/contact-us.html

.

Best Regards,

Imen.