How To Play Digitally Generated Sine Wave

Nhyrane · ‎2024-07-23

I just finish a TouchGFX code to generate an adjustable sine wave. I am planning to make 3 of them to mix them and play chords but there is a problem: how can i play a function that generated in STM32 on the speakers of that STM32?

I would be so glad to any help from you all.

SofLit · ‎2024-07-24

Hello,

@Nhyrane wrote:

I work with STM32F746G-Disco board. It has stereo output (two jacks). I just want to direct my signal to stereo but I don't know how to do it.

In that case, you need to use the audio codec on the board.

And its BSP driver from the link:

https://github.com/STMicroelectronics/32f746gdiscovery-bsp/blob/64c20f758a907cd873e368502cf16e498934d0ec/stm32746g_discovery_audio.c

And refer to the audio example:

https://github.com/STMicroelectronics/STM32CubeF7/tree/master/Projects/STM32746G-Discovery/Applications/Audio/Audio_playback_and_record

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
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View solution in original post

Andrew Neil · ‎2024-07-23

PWM ?

DAC ?

A speaker would likely also require an amplifier/driver of some sort ...

TDK · ‎2024-07-23

Broadly speaking, you would send them to the speaker. Does your board have a speaker? What hardware are you working with?

If you feel a post has answered your question, please click "Accept as Solution".

Nhyrane · ‎2024-07-24

I work with STM32F746G-Disco board. It has stereo output (two jacks). I just want to direct my signal to stereo but I don't know how to do it.

SofLit · ‎2024-07-24

Hello,

@Nhyrane wrote:

I work with STM32F746G-Disco board. It has stereo output (two jacks). I just want to direct my signal to stereo but I don't know how to do it.

In that case, you need to use the audio codec on the board.

And its BSP driver from the link:

https://github.com/STMicroelectronics/32f746gdiscovery-bsp/blob/64c20f758a907cd873e368502cf16e498934d0ec/stm32746g_discovery_audio.c

And refer to the audio example:

https://github.com/STMicroelectronics/STM32CubeF7/tree/master/Projects/STM32746G-Discovery/Applications/Audio/Audio_playback_and_record

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
PS: Be polite in your reply. Otherwise, it will be reported as inappropriate and you will be permanently blacklisted from my help/support.

Andrew Neil · ‎2024-07-24

@Nhyrane wrote:
I work with STM32F746G-Disco board.

Remember that we can't read your mind, or see what's on your desk - that's why it's important to include these details in your post:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/ta-p/575228

@Nhyrane wrote:
It has stereo output (two jacks).

So, from the User Manual, you'll know that they are connected to the external Audio DAC & Amplifier:

Nhyrane · ‎2024-07-24

Thanks for your time and patience. That was my very first blog post but i will take account of your advice. Thanks again for guidance. Have a nice one.