Posted on March 01, 2017 at 10:34Hi.
I designed a PCB to use stm32f407 and TLV320AIC12 codec for capturing and playing sound.
As you can see I connected I2S pin of stm to tlv in this way:
STM32F407 TLV320AIC12
CK---------------------------->SCLK
WS--------------------------->FS
ext_SD---------------------->Dout
SD---------------------------->Din
MCK-------------------------->MCLK
and also I connected INP to microphone and OUTP1 to speaker.
I used stmcube software for configure my application, so I wrote my code in the following format and started speaking in microphone but I could not hear any voice from speaker.
I do not have any idea why it is not working.
thank you for guiding me in advance.
//*******************************************************************
MX_I2S2_Init();
uint8_t CnvRx[50];
uint16_t Txbuff[5];
uint16_t Rxbuff[5];
while(1)
{
Txbuff[0]=Rxbuff[0]; //DAC input data
Txbuff[1]=0x0000;
HAL_I2SEx_TransmitReceive(&hi2s2,Txbuff,Rxbuff,2,100);
sprintf((char*)CnvRx,'%04X,%04X\n',Rxbuff[0],Rxbuff[1]);
Debugger_Send_Data(CnvRx);//send data out by uart
}
DebuggerOutput:
000F,0000
0010,0000
000D,8000
000E,0000
000E,8000
//*******************************************************************
#stm32f407 #tlv320aic12 #codec
