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Multiple ADC sampling on STM32DISCOVERY Board

Question asked by desc.oliver on Jun 24, 2016
Hi, I'm currently working on a project with my school, I have to sample 3 different audio signals at 44100Hz and send them to a computer using the ethernet port. 
I have configured my board with cubeMX.
     -I wanted to know if the Counter Period in the TIM parameters was the sample frequency in Hz because my 3 ADC's are triggered by this timer
     -How to store the ADC's values in an array so I can send them? I will be using at least 2 arrays buffers so I don't loose data: the first record and during this time the second one (with data inside) is sent to the computer via ethernet.  Do I have to use this function? Is it inside the while(1)?
HAL_ADC_Start_DMA(&hadc1, (uint32_t*) ADC1ConvertedValues, BUFFER_SIZE_ADC*2)
     -With the lwIP library how do I connect to an other computer and send the datas I have in the buffers?