How To Play Digitally Generated Sine Wave

[Nhyrane]

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.

[Andrew Neil]

PWM ?

DAC ?

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

[TDK]

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

[Nhyrane]

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 · Accepted solution]

Hello,

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@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.

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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

[Andrew Neil]

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@Nhyrane wrote:

I work with STM32F746G-Disco board.

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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

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@Nhyrane wrote:

It has stereo output (two jacks).

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

[Nhyrane]

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.