About SJoo.1

SJoo.1 · 2022-11-29

Hi.I used USB_OTG_FS as Audio Device Class on STM32F407-discovery.I connected PC and STM32F407-discovery with USB device.When I played music, sometimes sound is not occurred on STM32F407-discovery.I found that epnum in USBD_LL_DataOutStage is always ...

SJoo.1 · 2022-11-15

Hi, expert,I'd like to use external audio codec with STM32f407-Discovery.STM32 is master and Audio data is receved and transfered using I2S3 Interface.Below is connection between STM32F407 and Audio Codec.And I used I2S DMA for transfer and receive d...

SJoo.1 · 2022-09-29

Hi, Expert,I have STM32F407-Discovery and I'd like to use CMSIS DSP Library for audio processing.When I checked the library version which is released, it looks 5.5.4.So, I downloaded latest CMSIS DSP Library and build it for cortex-m4 atchitecture,Be...

SJoo.1 · 2022-08-01

Hi, I'd like to play music through i2s interface using external audio codec.Refer to "STM32F4xx Reference Manual", Below setting is needed if MCLK is enabled on 48Khz FS.PLLI2SN : 258 PLLI2SR : 3 I2SDIV : 3I2SODD : 1After I configured above, BCLK and...

SJoo.1 · 2022-08-08

Dear JW,Thank you for reply.I'm trying to generate 24.576Mhz frequencies using a timer.But I'm not sure it is possible to generate 24.576Mhz frequencies using a timer.How do you think of it?SeungKyu Joo

SJoo.1 · 2022-08-03

Dear waclawek.jan,Why do you need that?=>External Codec which I use need 24.576 Mhz as MCLK.But some personal reason, I need to use 48Khz FS.You can generate arbitrary frequencies e.g. using a timer.=>I thought MCLK should be syncronized with BCLK ...

SJoo.1 · 2022-08-02

Thank you for your reply.So it is impossible to generate 24.576 Mhz on 16bit 2channel 48Khz format.

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[STM32F407-Discovery] Sometimes music is not played through USB Audio.

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Re: stm32f407 - Question of i2s clock frequency