Difference between revisions of "ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/PCIe"

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<section begin="History" />
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<section begin=History/>
 
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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" |2021/12/13
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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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|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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|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/>
  
 
==PCIe interface ==
 
==PCIe 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 PCI Express interface can be available on the Evaluation Kit at the connector J36. This connector is not mounted by default.
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The PCIe interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
−
 
 
−
J36 is a USB3.0 Type-A connector that delivers 1x PCIe slot. An external adapter is needed to route the signals to a standard PCIe connector.
 
−
 
 
−
The external adapter can be found as a ''PCIe riser'', commonly used in Ethereum mining like [https://www.parallelminer.com/product/ithoo-usb3-0-pci-express-1x-to-16x-extender-riser-card-adapter-w-24-cable/ this one].
 
  
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{{ImportantMessage|text='''WARNING:''' do not connect USB devices to this 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).
  
  
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[[File:ORCA-EVK-PCIe-connector.png|thumb|center|500px|PCIe connector]]
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[[File:{{{nome-som}}-EVB-PCIe-connector.png|thumb|center|500px|PCIe connector]]
  
 
===Signals ===
 
===Signals ===
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{| class="wikitable"  
 
{| class="wikitable"  
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! latexfontsize="scriptsize" | Pin#
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! latexfontsize="scriptsize"| Pin#
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! latexfontsize="scriptsize" | SOM Pin#
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! latexfontsize="scriptsize"| SOM Pin#
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! latexfontsize="scriptsize" | Pin name
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! latexfontsize="scriptsize"| Pin name
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! latexfontsize="scriptsize" | Pin function
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! latexfontsize="scriptsize"| Pin function
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! latexfontsize="scriptsize" | Pin Notes
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! latexfontsize="scriptsize"| Pin Notes
 
|-
 
|-
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|1
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|1,2,4,6,,7,8,10
 
| -
 
| -
−
|VBUS
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| N.A.
−
| PCIE_WAKE#
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| N.C.
−
| Routed to a test point
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| Not connected
 
|-
 
|-
−
| 2
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| 3
−
|J15.157
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| J1.189
−
|D-
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| RS232_RX
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| PCIE2_REF_CN_CLKN
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| Receive line
 
|  
 
|  
 
|-
 
|-
 
| 3
 
| 3
−
|J15.155
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| J1.187
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|D+
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| RS232_TX
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| PCIE2_REF_CN_CLKP
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| Transmit line
 
|  
 
|  
 
|-
 
|-
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|4
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| 9
 
| -
 
| -
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|GND
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| DGND
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| PCIE_PERST#
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| Ground
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| Routed to a test point
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|  
−
|-
 
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|5
 
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|J15.159
 
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|SSRX-
 
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|PCIE_TXN_P
 
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|Internally decoupled with 100nF series
 
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|-
 
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|6
 
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|J15.161
 
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|SSRX+
 
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|PCIE_TXN_N
 
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|Internally decoupled with 100nF series
 
−
|-
 
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|7
 
−
| -
 
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|GND_D
 
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|Ground
 
−
|
 
−
|-
 
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|8
 
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|J15.163
 
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|SSTX-
 
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|PCIE_RXN_P
 
−
|
 
−
|-
 
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|9
 
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|J15.165
 
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|SSTX+
 
−
|PCIE_RXN_N
 
−
|
 
 
|}
 
|}
  
 
=== Device mapping ===
 
=== Device mapping ===
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The PCI express peripheral is mapped to the corresponding device in Linux depending on the associated kernel device driver and on the device tree configuration.
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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.
 +
 
 +
=== Device usage ===
 +
 
 +
To connect to the debug serial port:
 +
 
 +
# 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)
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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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[[Category:ORCA]]
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[[Category:ORCA SOM]]

Revision as of 15:28, 15 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
... ... ...


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