which functions and pins I should use for the CS43L22 output ?

[hussien kazan]

Hi, I am working on a new project, generating a signal on the pc then transfer it by serial port to the stm32f407vg board, which output the signal as sound or audio by connecting a speaker or headphone to the board, I did the application on c# and it is read, and I know how to receive it from the serial port, but I need to know which functions and pins I should use for CS43L22 output, can some one help???

[waclawek.jan]

> to the stm32f407vg board

What board?

Generally, the DACs in STM32 have big output impedance and you cannot drive a speaker with them, you need to add an output amplifier.

DAC in STM32F407 if connected to PA4 and PA5, check the STM32F407 datasheet.

High-quality audio is usually not output through the built-in DAC, but through external audio DACs; for example see the STM32F4DISCOVERY board https://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-eval-tools/stm32-mcu-eval-tools/stm32-mcu-discovery-kits/stm32f4discovery.html

JW

[hussien kazan]

the board is stm32f407vg:

my application transmit an string array to the serial port:

[AvaTar]

This is the CS43L22 output, not related the internal DAC of the MCU.

The Discovery firmware package, which waclawek.jan linked to in his post, contains example code for this chip.

[hussien kazan]

can u send me a simple example link , because i search so much i couldn't find an example that is simply explained.

[hussien kazan]

thanks for the information, i tried to find its name but i couldn't ...