Hi
I have a project similar
Im looking for a MCU/DSP have 5/6 UART, 4 PCM, 1 USB to interface with 4 GSM module and mother board
Can evryone suggest me a right MCU/DSP part?
Thanks
I have to design a VoIP telephone system. Basically interface (thru slic) a normal telephone with an data existing network. Therefore, users should be able to make normal telephone conversations using the data network.
Here is more info on the project:
I am using a microcontroller (MCU) from Freescale, which has a built-in Ethernet port capability to do the data processing and to send data over the Ethernet. I am also using a SLIC (Si3210 ProSLIC from Silabs) to interface with the telephone, this SLIC encodes the voice to PCM samples continuously (as long the the conversation is active). This PCM data has to be captured into the MCU (MC9S12NE64) and stored. I need to send this PCM data via the ethernet interface of the MC9S12NE64 using UDP.
I need to send this pcm data (caller) and receive the other pcm data (from the called party) simultaneously via the ethernet. Hence, enabling a full duplex conversation just like on a telephone line.
The IP address of the destination is dependent on the phone number which was dialled,- for demo purposes, i am just going to use one phone number, i.e. 1024 = 192.168.2.1 - this phone number is decoded from the telephone via the SLIC. Therefore, when the user dials 1024, the mcu tells the SLIC to start coding the PCM, this coded pcm must be captured and must be send over the ethernet (udp protocol). The called party's mcu must receive the udp (pcm) data and send it over to the slic to be decoded and later play it over the telephone. <SCRIPT></SCRIPT>
It would have to nice if the mcu i am currently using (NE64) had two SPI like you suggested, but i dont know if is wise buying another mcu now as i am nearing my deadline.
The other thing is that i am using the spi (the only) to contro the slic, i use it to continously check if the phone is offhook or onhook.
You referred to hardware to get the data in PCM format, do you actually get in ICs that do that ? Any other of reading pcm data in perphaps?
Please advise
Regards
Zircon