Difference between revisions of "AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/Audio"

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(Created page with "{{subst:EVB_Interfaces_and_Connectors | nome-som=AXEL ULite | nome-peripheral = Audio}}")
 
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==Audio interface ==
 
==Audio interface ==
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''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
 
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''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
 
  
 
=== Description  ===
 
=== Description  ===
  
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The Audio interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
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The ''optional'' audio interface available on the Evaluation Kit at the connector J14.
  
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''Jxx'' is a ''TBD:connector-type'' header connector for the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console).
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J14 is a [https://www.molex.com/molex/products/part-detail/pcb_headers/0533750610 Molex 53375-0610] header connector. The audio codec is a TLV320AIC3100 device connected to the I²S interface.
  
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[[File:AXEL_ULite-EVB-audio-connector.png|thumb|center|500px|Audio connector]]
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[[File:{{{nome-som}}-EVB-Audio-connector.png|thumb|center|500px|Audio connector]]
 
  
 
===Signals ===
 
===Signals ===
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{| class="wikitable"  
 
{| class="wikitable"  
 
! latexfontsize="scriptsize"| Pin#
 
! latexfontsize="scriptsize"| Pin#
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! latexfontsize="scriptsize"| SOM Pin#
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! latexfontsize="scriptsize"| Codec Pin#
 
! latexfontsize="scriptsize"| Pin name
 
! latexfontsize="scriptsize"| Pin name
 
! latexfontsize="scriptsize"| Pin function
 
! latexfontsize="scriptsize"| Pin function
 
! latexfontsize="scriptsize"| Pin Notes
 
! latexfontsize="scriptsize"| Pin Notes
 
|-
 
|-
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|1,2,4,6,,7,8,10
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|J14.1 || 27 || HSOL || Left channel Headphone/line output || -
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| -
 
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| N.A.
 
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| N.C.
 
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| Not connected
 
 
|-
 
|-
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| 3
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|J14.2 || 30 || HSOR || Right channel Headphone/line output || -
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| J1.189
 
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| RS232_RX
 
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| Receive line
 
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|  
 
 
|-
 
|-
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| 3
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|J14.3 || 22 || SPKP || Speaker +  output || -
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| J1.187
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|-
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| RS232_TX
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|J14.4 || 23 || SPKM || Speaker -  output || -
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| Transmit line
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|-
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|  
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|J14.5 || 11 || MIC IN || Microphone input || -
 +
|-
 +
|J14.6 || 12 || MIC BIAS || Microphone bias || -
 
|-
 
|-
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| 9
 
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| -
 
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| DGND
 
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| Ground
 
−
|
 
 
|}
 
|}
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=== Device mapping ===
 
=== Device mapping ===
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UART3 is mapped to <code>/dev/ttymxc2</code> device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel.
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The Audio interface is mapped to <code>card0</code> ALSA device in Linux. The ALSA peripheral <code>#0: sfczg-audio-tlv320aic3100</code> can be accessed via alsa-utils with hardware address 0.
  
 
=== Device usage ===
 
=== Device usage ===
  
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To connect to the debug serial port:
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For example, it is possible to play a file using <code>aplay -D hw:0,0</code> device access.
  
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# connect the DB9 adapter bracket to the J22 connector on the SBCX board
 
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# connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)
 
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# start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
 
  
 
----
 
----
  
 
[[Category:AXEL ULite]]
 
[[Category:AXEL ULite]]

Revision as of 14:07, 19 July 2021

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History
Version Issue Date Notes
1.0.0 Jul 2021 First DESK release


Audio interface[edit | edit source]

Description[edit | edit source]

The optional audio interface available on the Evaluation Kit at the connector J14.

J14 is a Molex 53375-0610 header connector. The audio codec is a TLV320AIC3100 device connected to the I²S interface.

Audio connector

Signals[edit | edit source]

The following table describes the interface signals:

Pin# Codec Pin# Pin name Pin function Pin Notes
J14.1 27 HSOL Left channel Headphone/line output -
J14.2 30 HSOR Right channel Headphone/line output -
J14.3 22 SPKP Speaker + output -
J14.4 23 SPKM Speaker - output -
J14.5 11 MIC IN Microphone input -
J14.6 12 MIC BIAS Microphone bias -

Device mapping[edit | edit source]

The Audio interface is mapped to card0 ALSA device in Linux. The ALSA peripheral #0: sfczg-audio-tlv320aic3100 can be accessed via alsa-utils with hardware address 0.

Device usage[edit | edit source]

For example, it is possible to play a file using aplay -D hw:0,0 device access.


HOME SOMs SBCs ToloMEO Embedded Assistant Sale-tag.pngGET A QUOTE Customer-service.pngONLINE HELPDESK
Roadmap IoT Services ML/AI services Embedded Design Services
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