Hello every one.
I am using the EC200UEUAAR03A16M08 version of the EC200U module in my project.
My goal is to play audio stored in the microcontroller(STM32F429VE) during a phone call made by the EC200U module. I am using the microcontroller’s I2S unit to transmit digital audio to EC200U. The pins of the microcontroller and the EC200U are connected in the following order:
EC200U-----------------------------STM32F429VE
PCM_SYNC<-------------------->I2S_WS
PCM_CLK <-------------------->I2S_CK
PCM_DIN <-------------------->I2S_SD
The settings for the I2S unit are as follows:
Communication Standard-----------------------PCM with Short Synchro Frame.
Data and Frame Format-------------------------16 Bits Data on 16 Bits Frame.
Selected Audio Frequency----------------------16 KHz.
The frequency of the I2S_WS signal is 16 kHz.
The frequency of the I2S_CK signal is 256 kHz.
I sent these commands to configure the EC200U:
AT+QDAI=0,1,0 (I also tested this parameter==>AT+QDAI=0,1,1)
AT+QAUDSW=0
In the microcontroller, I transmit a 2-second sound through the I2S unit every 10 seconds. But during a phone call, nothing is played to the user, only noise is played.
Am I making a mistake somewhere?
Help me to solve it, Please.