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<section begin="History" />
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<section begin=History/>
 
{| style="border-collapse:collapse; "
 
{| style="border-collapse:collapse; "
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! colspan="4" style="width:100%; text-align:left" ; border-bottom:solid 2px #ededed" |History
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!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
 
|-  
 
|-  
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! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Issue Date
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!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Version
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! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Notes
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!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
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!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
 
|-
 
|-
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| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |2021/12/10
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|X.Y.Z
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| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |First release
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Month Year
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|TBD
 
|-
 
|-
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|-
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|[TBD_link X.Y.Z]
 +
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Month Year
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|TBD
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|-
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|...
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|...
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|...
 
|-
 
|-
 
|}
 
|}
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<section end="History" />
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<section end=History/>
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<section begin="Body" />
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<section begin=Body/>
  
 
==LVDS interface ==
 
==LVDS 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 LVDS interface available on the Evaluation Kit at the connector J13
+
The LVDS interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
−
 
 
−
J13 is a 20x2x1.25mm DF13E-40DP-1.25V(51) Hirose header connector.
 
  
−
On this connector are routed two separate LVDS interfaces that can operate in dual-channel mode to drive high resolution displays.
+
''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:ORCA-EVK-LVDS-connector.png|thumb|center|500px|LVDS connector]]
+
[[File:{{{nome-som}}-EVB-LVDS-connector.png|thumb|center|500px|LVDS connector]]
  
 
===Signals ===
 
===Signals ===
  
−
The following table describes the interfaces signals:
+
The following table describes the interface signals:
  
 
{| class="wikitable"  
 
{| class="wikitable"  
−
! latexfontsize="scriptsize" | Pin#
+
! latexfontsize="scriptsize"| Pin#
−
! latexfontsize="scriptsize" | SOM Pin#
+
! latexfontsize="scriptsize"| SOM 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
 
|-
 
|-
−
|1, 3
+
|1,2,4,6,,7,8,10
 
| -
 
| -
−
|3V3_LCD
+
| N.A.
−
|Power output
+
| N.C.
−
|GPIO driven rail
+
| Not connected
−
|-
 
−
|7
 
−
|J15.49
 
−
|LVDS0_D0_N
 
−
|LVDS Data 0 -
 
−
|
 
−
|-
 
−
|9
 
−
|J15.51
 
−
|LVDS0_D0_P
 
−
|LVDS Data 0 +
 
−
|
 
 
|-
 
|-
−
|2
+
| 3
−
|J15.45
+
| J1.189
−
|LVDS0_D1_N
+
| RS232_RX
−
|LVDS Data 1 -
+
| Receive line
−
|
+
|  
 
|-
 
|-
−
|4
+
| 3
−
|J15.47
+
| J1.187
−
|LVDS0_D1_P
+
| RS232_TX
−
|LVDS Data 1 +
+
| Transmit line
−
|
+
|  
 
|-
 
|-
−
|13
+
| 9
−
|J15.37
 
−
|LVDS0_D2_N
 
−
|LVDS Data 2 -
 
−
|
 
−
|-
 
−
|15
 
−
|J15.39
 
−
|LVDS0_D2_P
 
−
|LVDS Data 2 +
 
−
|
 
−
|-
 
−
|19
 
−
|J15.41
 
−
|LVDS0_CLK_N
 
−
|LVDS Clock -
 
−
|
 
−
|-
 
−
|21
 
−
|J15.43
 
−
|LVDS0_CLK_P
 
−
|LVDS Clock +
 
−
|
 
−
|-
 
−
|8
 
−
|J15.33
 
−
|LVDS0_D3_N
 
−
|LVDS Data 3 -
 
−
|
 
−
|-
 
−
|10
 
−
|J15.35
 
−
|LVDS0_D3_P
 
−
|LVDS Data 3 +
 
−
|
 
−
|-
 
−
|5, 6, 11, 12, 17, 18, 23, 26, 29, 32, 35
 
 
| -
 
| -
−
|DGND
+
| DGND
−
|Ground
+
| Ground
−
|
+
|  
−
|-
 
−
|25
 
−
|J15.71
 
−
|LVDS1_D0_N
 
−
|LVDS Data 0 -
 
−
|
 
−
|-
 
−
|27
 
−
|J15.73
 
−
|LVDS1_D0_P
 
−
|LVDS Data 0 +
 
−
|
 
−
|-
 
−
|31
 
−
|J15.67
 
−
|LVDS1_D1_N
 
−
|LVDS Data 1 -
 
−
|
 
−
|-
 
−
|33
 
−
|J15.69
 
−
|LVDS1_D1_P
 
−
|LVDS Data 1 +
 
−
|
 
−
|-
 
−
|28
 
−
|J15.59
 
−
|LVDS1_D2_N
 
−
|LVDS Data 2 -
 
−
|
 
−
|-
 
−
|30
 
−
|J15.61
 
−
|LVDS1_D2_P
 
−
|LVDS Data 2 +
 
−
|
 
−
|-
 
−
|34
 
−
|J15.63
 
−
|LVDS1_CLK_N
 
−
|LVDS Clock -
 
−
| rowspan="2" |Can be terminated on board
 
−
for dual-channel mode
 
−
|-
 
−
|36
 
−
|J15.65
 
−
|LVDS1_CLK_P
 
−
|LVDS Clock +
 
−
|-
 
−
|37
 
−
|J15.55
 
−
|LVDS1_D3_N
 
−
|LVDS Data 3 -
 
−
|
 
−
|-
 
−
|39
 
−
|J15.57
 
−
|LVDS1_D3_P
 
−
|LVDS Data 3 +
 
−
|
 
−
|-
 
−
|14, 16, 18
 
−
| -
 
−
|5V_LCD
 
−
|Power output
 
−
|GPIO driven rail
 
−
|-
 
−
|20
 
−
| -
 
−
|VIN_BL_AUX1
 
−
|Power output
 
−
| rowspan="2" |Default connected to VIN_BL.
 
−
Can be connected to an external
 
−
 
 
−
controller to generate custom rails.
 
−
|-
 
−
|22
 
−
| -
 
−
|VIN_BL_AUX2
 
−
|Power output
 
−
|-
 
−
|24
 
−
| -
 
−
|VIN_BL
 
−
|Power output
 
−
|GPIO driven rail
 
−
|-
 
−
|38
 
−
|J15.240
 
−
|LCD_BKLT_PWM
 
−
|PWM output
 
−
|Default routed to PWM1
 
−
Can be routed to PWM2
 
−
|-
 
−
|40
 
−
|J15.213
 
−
|LCD_EN
 
−
|GPIO
 
−
|
 
 
|}
 
|}
  
 
=== Device mapping ===
 
=== Device mapping ===
−
* LVDS0 is ''typically'' mapped to <code>/dev/fb0</code> device in Linux
+
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.
−
* LVDS1 is mapped to the corresponding device driver in Linux, depending on the <code>ldb</code> peripheral configuration in the device tree. The default value is ''disabled'' but can be mapped to <code>/dev/fb2</code> (second and independent LCD panel) or can be the second LVDS channel for a dual-channel LCD panel configuration (like a 1920x1080 DUAL LVDS channel LCD panel)
 
  
−
=== Power sequence ===
+
=== Device usage ===
−
Most of the LCD panels has many supplies and need a specific timing to power the rails and start the the signals.
 
−
 
 
−
The Evaluation Kit provides GPIO controlled power rails that can be leveraged both at bootloader and kernel level to meet any specifications.
 
−
 
 
−
The following sections describe the available rails:
 
−
 
 
−
==== 3V3_LCD ====
 
−
The most common voltage to supply the LCD panel internal logic. This rail is enabled by <code>GPIO1_IO06</code> that is connected to J15.233
 
−
 
 
−
==== 5V_LCD ====
 
−
The most common voltage to supply the LCD panel backlight. This rail is enabled by <code>GPIO1_IO08</code> that is connected to J15.209
 
−
 
 
−
==== VIN_LCD ====
 
−
The voltage of this rail is the system input voltage, see [[ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/Power Supply|Power Supply]] section for more details. This rail is enabled by <code>GPIO1_IO07</code> that is connected to J15.225
 
−
 
 
−
==== VIN_LCD_AUX ====
 
−
There are two more pins to deliver higher current on the rail VIN_LCD. These two pins can be instead separately routed to the expansion connector J40.
 
−
 
 
−
J40 is a 6x1x2.54mm strip header connector, not mounted by default. This connector can house an external controller that generates up to 2 custom rails, controlled by GPIOs.
 
−
 
 
−
===== J40 Signals =====
 
−
The following table describes the interface signals:
 
−
{| class="wikitable"
 
−
! latexfontsize="scriptsize" | Pin#
 
−
! latexfontsize="scriptsize" | SOM Pin#
 
−
! latexfontsize="scriptsize" | Pin name
 
−
! latexfontsize="scriptsize" | Pin function
 
−
! latexfontsize="scriptsize" | Pin Notes
 
−
|-
 
−
|1
 
−
| -
 
−
|VIN
 
−
|Power output
 
−
|This is the power supply voltage
 
−
|-
 
−
|2
 
−
|J15.240
 
−
|LCD_BKLT_PWM
 
−
|PWM output
 
−
|Default routed to PWM1
 
−
Can be routed to PWM2
 
−
|-
 
−
|3
 
−
|J15.225
 
−
|GPIO1_IO07
 
−
|GPIO
 
−
|
 
−
|-
 
−
|4
 
−
| -
 
−
|VIN_BL_AUX2
 
−
|Power input
 
−
|
 
−
|-
 
−
|5
 
−
| -
 
−
|VIN_BL_AUX1
 
−
|Power input
 
−
|
 
−
|-
 
−
|6
 
−
| -
 
−
|DGND
 
−
|Ground
 
−
|
 
−
|}
 
  
−
=== Device usage ===
+
To connect to the debug serial port:
−
The display power sequence can be leveraged by a DAVE custom code that allow to set the timings both in U-boot and in Linux kernel sources.
 
  
−
The associated framebuffer device is accessed in Linux through the standard graphic 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:ORCA]]
+
[[Category:ORCA SOM]]

Revision as of 09:36, 7 September 2021

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


LVDS 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 LVDS 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-LVDS-connector.png|thumb|center|500px|LVDS 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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