!HELP! STM32 Discovery to capture PCM signal from GTM382 modem

kajuslt · ‎2012-04-11

Posted on April 11, 2012 at 18:48

Hi everyone,

I'm very new to STM32 Discovery and I want to do some project with it. I need to capture PCM signal(voice) from GTM382 modem before it reaches CODEC. I know there is PINS:

MCLK - 2MHz

PCMSYNC - 8 kHz

PCMI - PCM input, which is devided into 8 byte slots.

So I need to overtake it, I need to make STM32 Discovery clock work simultanously with GTM382 modems' (2MHz) and PCMSYNC will show me when is begining of new slot of 8 bytes(flag), so I need to take the stream correctly and send it to PC (make a .wav file). Please help. Any suggestions?

#!surprised #gtm382 #adc-stm32-discovery

Tesla DeLorean · ‎2012-04-11

Posted on April 11, 2012 at 19:01

As an SPI or I2S slave perhaps?

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kajuslt · ‎2012-04-11

Posted on April 11, 2012 at 19:10

SPI.