CCS / TIDC-CC3200MODLAUNCHXL:WIFI_AUDIO_APP: AUDIO FROM SPI FLASH

Georgiy,

A few questions. What format is the audio saved on the external flash? What peripheral are you using to send the audio out (I2S)? 

I would break this down into a few steps. Can you first verify the data you receive from the serial flash is what you expect? Lets verify the data here is valid. Next, can we check if your sending I2S data correctly out to an audio codec?

Regards,

VR

Dear Vincent

I was wrong, I'm using wav format (windows pcm)

Dear Vincent

I downloaded a file format RAW PCM 16 khz 16 bit stereo, uploaded it to a serial flash, tried to play audio, but still hear hiss and buzz

please answer these questions:

1) How many bytes do I need to load into the pPlayBuffer for one iteration?

On this function:

illBuffer(pPlayBuffer, (unsigned char*)(g_ucRxBuff->pucReadPtr), 528);

I'm sending 528 because it's the size of one page, but the example sent 1024 bytes (PACKETSIZE).

2)Is the pPlayBuffer filled out somewhere else in the project?
maybe this hissing due to the fact that data is connected to the correct data from serial flash and pPlayBuffer is filled with mixed incorrect data.

Please tell us your thoughts on this issue, any help is very necessary!
Sorry for my bad english!

Waiting for your reply!

Regards,

George.

Hello Vincent,

In the beginning I started the example in the callback mode. And when I disabled the speaker and network tasks, I still heard the sounds from the microphone. So I thought that the speaker task is only needed when we have two LaunchpadXL boards. Please look at the code:

void Speaker( void *pvParameters )
{
    long iRetVal = -1;


    while(1)
    {
        while(g_ucSpkrStartFlag || g_loopback)
        {     

            if(!g_loopback)
            {
                fd_set readfds,writefds;
                struct SlTimeval_t tv;
                FD_ZERO(&readfds);
                FD_ZERO(&writefds);
                FD_SET(g_UdpSock.iSockDesc,&readfds);
                FD_SET(g_UdpSock.iSockDesc,&writefds);
                tv.tv_sec = 0;
                tv.tv_usec = 2000000;
                int rv = select(g_UdpSock.iSockDesc, &readfds, NULL, NULL, &tv);
                if(rv <= 0)
                {
                    continue;
                }
                if (FD_ISSET(g_UdpSock.iSockDesc, &readfds) )
                {
                    g_iRetVal = recvfrom(g_UdpSock.iSockDesc, (char*)(speaker_data),\
                                          PACKET_SIZE*16, 0,\
                                          (struct sockaddr *)&(g_UdpSock.Client),\
                                          (SlSocklen_t*)&(g_UdpSock.iClientLength));
                }

                if(g_iRetVal>0)
                {
                    iRetVal = FillBuffer(pPlayBuffer, (unsigned char*)speaker_data,\
                                          g_iRetVal);
                    if(iRetVal < 0)
                    {
                        UART_PRINT("Unable to fill buffer");
                        LOOP_FOREVER();
                    }
                }
            }
            else
            {
                MAP_UtilsDelay(1000);
            }
        }
        MAP_UtilsDelay(1000);
    }
}

Since gloopback = 1, the speaker task executes only delay.

Maybe I should like to change this function?

  g_iRetVal = recvfrom(g_UdpSock.iSockDesc, (char*)(speaker_data),\
                                          PACKET_SIZE*16, 0,\
                                          (struct sockaddr *)&(g_UdpSock.Client),\
                                          (SlSocklen_t*)&(g_UdpSock.iClientLength));

but I do not know how to do it and do I need it to accomplish my problem?

So, now I've started the speaker task, but still I do not hear the melody from the serial flash

Regards,

George

Vincent!

Today I worked and found a few interesting things!

1) If I write a small piece of an audio file into the memory of the cc3200 and try to fill it with the pPlayBuffer buffer, then at first I hear a lot of noise, and then a couple of milliseconds of the audio I need.
2) From this it can be concluded that I correctly fill the pPlayBuffer, to play the sound it needs to be done. But the data that I write in pPlayBuffer is not correct.
3) At the same time, I correctly read it from a serial flash.

Looking at these facts, I conclude that I do not correctly use the filling functions of arrays and buffers and do not correctly send them to pPlayBuffer, can you help me with this?

thanks for your time!

George.