RTP and STM32f107
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2014-08-07 10:59 AM
Posted on August 07, 2014 at 19:59
I use STM32f107 for audio broadcasting in ethernet network.
I use trigged ADC (timer) to generate 8KHz PCM and buffer ADC data with DMA and make Alaw(G711,Fast conversation,table based) and send data with UDP. I use VLC player on PC and get audio correctly.I have this problem:Received audio is not continues when I send Ping Packet or network has broadcast packets. I changed audio buffer form 160(uint16_t,20mS) to 800 (100mS) but the result is same as before.I changed other parameters too but the result is same as before:- OS tick (sys-tick) and OS round-robin tick- TCP Task mechanism(event base and pulling)Info:- Keil MDK-TCP- Keil RTX RTOS- DP83848,RMII,MCO 50MHZ, 100MB speedI have some question and request:- Is 72MHz CPU enough for this work?(I did not complete the received audio code on my board,audio must be full-duplex)- Is my buffering method true?- Have anybody RTP example?- what is maximum transfer rate of STM32F107 on UDP?I welcome to any idea and experience.Thanks in advance.
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