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

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!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
 
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__FORCETOC__
 
<section begin=Body/>
 
<section begin=Body/>
  
 
==Touchscreen interface ==
 
==Touchscreen 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  ===
  
−
The Touchscreen interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
+
The Touchscreen interface is available on the [[AXEL ULite SOM/AXEL ULite Evaluation Kit | AXEL ULite Evaluation Kit]] at the ''optional'' J5 connector.  
  
−
''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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J5 is a Molex 53398-0671 6 pin connector for connecting a I2C touchscreen controller device.
  
  
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[[File:{{{nome-som}}-EVB-Touchscreen-connector.png|thumb|center|500px|Touchscreen connector]]
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[[File:AXEL_ULite-EVB-Touchscreen-connector.png|thumb|center|500px|Touchscreen connector]]
  
 
===Signals ===
 
===Signals ===
  
 
The following table describes the interface signals:
 
The following table describes the interface signals:
 +
  
 
{| class="wikitable"  
 
{| class="wikitable"  
−
! latexfontsize="scriptsize"| Pin#
 
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! latexfontsize="scriptsize"| SOM Pin#
 
−
! latexfontsize="scriptsize"| Pin name
 
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! latexfontsize="scriptsize"| Pin function
 
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! latexfontsize="scriptsize"| Pin Notes
 
 
|-
 
|-
−
|1,2,4,6,,7,8,10
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!Pin#
−
| -
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!SOM Pin#
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| N.A.
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!Pin name
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| N.C.
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!Function
−
| Not connected
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!Notes
 +
|-
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|J5.1 || - || 5V or 3V3 depending on internal connection || -
 +
|-
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|J5.2 || J1.44 || SDA || I2C SDA || -
 +
|-
 +
|J5.3 || J1.42 || SCL || I2C SCL || -
 +
|-
 +
|J5.4 || J1.89 || INT || Interrupt || -
 
|-
 
|-
−
| 3
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|J5.5 || J1.128 || RES || Reset || -
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| J1.189
 
−
| RS232_RX
 
−
| Receive line
 
−
|  
 
 
|-
 
|-
−
| 3
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|J5.6  || - || DGND || Ground || -
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| J1.187
 
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| RS232_TX
 
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| Transmit line
 
−
|  
 
 
|-
 
|-
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| 9
 
−
| -
 
−
| DGND
 
−
| Ground
 
−
|
 
 
|}
 
|}
  
 
=== Device mapping ===
 
=== Device mapping ===
−
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 device is typically mapped to <code>/dev/touchscreen0</code> device in Linux.
  
 
=== Device usage ===
 
=== Device usage ===
  
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To connect to the debug serial port:
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The touch controller is attached to the generic Linux input event interface (evdev).
−
 
 
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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
 
  
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<section end=Body/>
  
 
[[Category:AXEL ULite]]
 
[[Category:AXEL ULite]]

Latest revision as of 10:29, 9 January 2024

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History
Issue Date Notes
2021/07/19 First EVK release



Touchscreen interface[edit | edit source]

Description[edit | edit source]

The Touchscreen interface is available on the AXEL ULite Evaluation Kit at the optional J5 connector.

J5 is a Molex 53398-0671 6 pin connector for connecting a I2C touchscreen controller device.


Touchscreen connector

Signals[edit | edit source]

The following table describes the interface signals:


Pin# SOM Pin# Pin name Function Notes
J5.1 - 5V or 3V3 depending on internal connection -
J5.2 J1.44 SDA I2C SDA -
J5.3 J1.42 SCL I2C SCL -
J5.4 J1.89 INT Interrupt -
J5.5 J1.128 RES Reset -
J5.6 - DGND Ground -

Device mapping[edit | edit source]

The device is typically mapped to /dev/touchscreen0 device in Linux.

Device usage[edit | edit source]

The touch controller is attached to the generic Linux input event interface (evdev).


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