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AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/Audio

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==Audio interface ==
 
''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
=== Description ===
The Audio ''optional'' audio interface available on the Evaluation Kit at the connector ''TBD:Jxxx''J14.
''Jxx'' J14 is a ''TBD[https:connector//www.molex.com/molex/products/part-detail/pcb_headers/0533750610 Molex 53375-type'' 0610] header connector for . The audio codec is a TLV320AIC3100 device connected to the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console)I²S interface.
 [[File:{{{nome-som}}AXEL_ULite-EVB-Audioaudio-connector.png|thumb|center|500px|Audio connector]]
===Signals ===
{| class="wikitable"
! latexfontsize="scriptsize"| Pin#
! latexfontsize="scriptsize"| SOM Codec Pin#
! latexfontsize="scriptsize"| Pin name
! latexfontsize="scriptsize"| Pin function
! latexfontsize="scriptsize"| Pin Notes
|-
|J14.1,2,4,6,,7,8,10| -| N.A.27 || HSOL || Left channel Headphone/line output | N.C.| Not connected-
|-
| 3J14.2 || 30 || J1.189HSOR | RS232_RX| Receive Right channel Headphone/lineoutput || -
|-
| J14.3|| 22 || SPKP || Speaker + output || -|-| J1J14.1874 || 23 || SPKM || Speaker - output || -| RS232_TX-| Transmit lineJ14.5 || 11 || MIC IN || Microphone input || -| -|J14.6 || 12 || MIC BIAS || Microphone bias || -
|-
| 9
| -
| DGND
| Ground
|
|}
 
=== Device mapping ===
UART3 The Audio interface is mapped to <code>/dev/ttymxc2card0</code> ALSA device in Linux. The ALSA peripheral is used as the default serial console, both for the bootloader and the kernel<code>#0: sfczg-audio-tlv320aic3100</code> can be accessed via alsa-utils with hardware address 0.
=== Device usage ===
To connect For example, it is possible to the debug serial portplay a file using <code>aplay -D hw:0,0</code> device access.
# connect the DB9 adapter bracket to the J22 connector on the SBCX board
# connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)
# start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
----
[[Category:AXEL ULite]]
U0007
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