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

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!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
 
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<section end=History/>
 
<section end=History/>
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__FORCETOC__
 
 
<section begin=Body/>
 
<section begin=Body/>
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==USB ports interface ==
 
==USB ports 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  ===
 
=== Description  ===
  
−
The [[AXEL ULite SOM/AXEL ULite Evaluation Kit | AXEL ULite Evaluation Kit]] provides two USB ports, one Host and one Host/OTG optional ports:
+
The USB ports interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
−
 
 
−
* J11 is a standard USB Host 2.0 Type A connector
 
−
 
 
−
[[File:AXEL_ULite-EVB-USB_Host-connector.png|thumb|center| 500px|USB Host connector]]
 
−
 
 
  
−
* J22 is a micro-AB type receptacle for an optional USB Host/OTG connection: this interface can be mounted on request and provide an Host or an OTG USB additional port:
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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).
  
  
−
[[File:AXEL_ULite-EVB-USB_optional-connector.png|thumb|center| 500px|USB Host/OTG (optional) connector]]
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[[File:{{{nome-som}}-EVB-USB ports-connector.png|thumb|center|500px|USB ports connector]]
  
 
===Signals ===
 
===Signals ===
  
−
The following table describes the interface signals
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The following table describes the interface signals:
−
 
 
−
 
 
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==== USB Host ====
 
  
 
{| class="wikitable"  
 
{| class="wikitable"  
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! latexfontsize="scriptsize"| Pin Notes
 
! latexfontsize="scriptsize"| Pin Notes
 
|-
 
|-
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| J11.1 || J1.188 || USB_HOST_VBUS || VBUS ||  
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|1,2,4,6,,7,8,10
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| -
 +
| N.A.
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| N.C.
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| Not connected
 
|-
 
|-
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| J11.2 || J1.202 || USB_HOST_DN || USB Host Data - ||  
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| 3
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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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| J11.3 || J1.200 || USB_HOST_DP || USB Host Data + ||  
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| 3
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| J1.187
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| RS232_TX
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| Transmit line
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|  
 
|-
 
|-
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| J11.4 || - || DGND || Ground ||  
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| 9
 +
| -
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| DGND
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| Ground
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|  
 
|}
 
|}
  
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==== USB Host/OTG ====
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=== 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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{| class="wikitable"
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=== Device usage ===
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! latexfontsize="scriptsize"| Pin#
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! latexfontsize="scriptsize"| SOM Pin#
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To connect to the debug serial port:
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! latexfontsize="scriptsize"| Pin name
 
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! latexfontsize="scriptsize"| Pin function
 
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! latexfontsize="scriptsize"| Pin Notes
 
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|-
 
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| J22.6, J22.7, J22.8 || - || USB_OTG_SH Shield || ||
 
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|-
 
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| J22.1 || J10.186 || USB_OTG_VBUS || VBUS ||
 
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|-
 
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| J22.2 || J10.196 || USB_OTG_DN || USB OTG Data - ||
 
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|-
 
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| J22.3 || J10.198 || USB_OTG_DP || USB OTG Data + ||
 
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|-
 
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| J22.4 || J10.101 || USB_OTG_ID || USB OTG ID ||
 
−
|-
 
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| J22.5 || - || GND || Ground||
 
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|}
 
  
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=== Device mapping ===
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# connect the DB9 adapter bracket to the J22 connector on the SBCX board
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The USB Host ports can be used under Linux for connecting USB peripheral devices: the related peripheral driver has to be integrated into the Linux kernel.
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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
  
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<section end=Body/>
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----
  
 
[[Category:AXEL ULite]]
 
[[Category:AXEL ULite]]

Revision as of 13:20, 19 July 2021

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History
Version Issue Date Notes
X.Y.Z Month Year TBD
[TBD_link X.Y.Z] Month Year TBD
... ... ...


USB ports interface[edit | edit source]

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[edit | edit source]

The USB ports interface available on the Evaluation Kit at the connector TBD:Jxxx.

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).


[[File:{Template:Nome-som-EVB-USB ports-connector.png|thumb|center|500px|USB ports connector]]

Signals[edit | edit source]

The following table describes the interface signals:

Pin# SOM Pin# Pin name Pin function Pin Notes
1,2,4,6,,7,8,10 - N.A. N.C. Not connected
3 J1.189 RS232_RX Receive line
3 J1.187 RS232_TX Transmit line
9 - DGND Ground

Device mapping[edit | edit source]

UART3 is mapped to /dev/ttymxc2 device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel.

Device usage[edit | edit source]

To connect to the debug serial port:

  1. connect the DB9 adapter bracket to the J22 connector on the SBCX board
  2. connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)
  3. start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
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