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

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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" |2021/12/10
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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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|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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|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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|}
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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/>
  
 
==CAN interface ==
 
==CAN 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 CAN interfaces are available on the Evaluation Kit at the connector J8.
+
The CAN interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
−
 
 
−
J8 is a 20x2x2.54mm pin header expansion connector that delivers many interfaces unused on board and can provide up to two CAN ports.
 
  
−
The CAN bus ports are compatible with the Flexible Data rate (CAN FD) and CAN 2.0B protocols specification.
+
''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-J8-connector.png|thumb|center|500px|CAN connector (on J8)]]
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[[File:{{{nome-som}}-EVB-CAN-connector.png|thumb|center|500px|CAN connector]]
  
 
===Signals ===
 
===Signals ===
  
 
The following table describes the interface signals:
 
The following table describes the interface signals:
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{| class="wikitable"
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!Pin#
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{| class="wikitable"  
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!SOM Pin#
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! latexfontsize="scriptsize"| Pin#
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!Pin name
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! latexfontsize="scriptsize"| SOM Pin#
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!Pin function
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! latexfontsize="scriptsize"| Pin name
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!Pin Notes
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! latexfontsize="scriptsize"| Pin function
 +
! latexfontsize="scriptsize"| Pin Notes
 
|-
 
|-
−
|10
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|1,2,4,6,,7,8,10
−
|J15.140
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| -
−
|SAI2_RXC
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| N.A.
−
|CAN1_TX
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| N.C.
−
|
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| Not connected
−
|-
 
−
|12
 
−
|J15.146
 
−
|SAI2_TXC
 
−
|CAN1_RX
 
−
|
 
 
|-
 
|-
−
|16
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| 3
−
|J15.148
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| J1.189
−
|SAI2_TXD0
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| RS232_RX
−
|CAN2_TX
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| Receive line
−
|
+
|  
 
|-
 
|-
−
|18
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| 3
−
|J15.138
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| J1.187
−
|SAI2_MCLK
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| RS232_TX
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|CAN2_RX
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| Transmit line
−
|
+
|  
−
|-
 
−
|22
 
−
|J15.166
 
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|SAI5_MCLK
 
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|CAN2_RX
 
−
|
 
−
|-
 
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|35
 
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|J15.176
 
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|SAI5_RXD3
 
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|CAN2_TX
 
−
|
 
−
|-
 
−
|36
 
−
|J15.174
 
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|SAI5_RXD2
 
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|CAN1_RX
 
−
|
 
−
|-
 
−
|37
 
−
|J15.172
 
−
|SAI5_RXD1
 
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|CAN1_TX
 
−
|
 
−
|-
 
−
|2, 4
 
−
| -
 
−
|5V_VIN
 
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|Power output for transceiver supply
 
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|Always ON rail
 
−
|-
 
−
|1, 17
 
−
| -
 
−
|3V3_CB
 
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|Power output for transceiver supply
 
−
|BOARD_PGOOD driven rail
 
 
|-
 
|-
−
|6, 9, 14, 20, 25, 30, 34, 39
+
| 9
 
| -
 
| -
−
|DGND
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| DGND
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|Ground
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| Ground
−
|
+
|  
 
|}
 
|}
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Please note that all the CAN signals are 0-3.3V level. If a 5V powered transceiver is used, a level shifting is needed to interface to the Evaluation Kit connector.
 
  
 
=== Device mapping ===
 
=== Device mapping ===
−
CAN devices are mapped to <code>/dev/can<X></code> device in Linux. The device mapping depends on the device tree configuration.
+
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 ===
 
=== Device usage ===
  
−
The Evaluation Kit doesn't implement any CAN transceiver, these are needed to mediate between the CAN bus and the CPU module.
+
To connect to the debug serial port:
  
−
The peripheral can be configured using <code>ifconfig</code> and <code>ip link</code> utilities and can be tested with the <code>can-utils</code> utilities.
+
# 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 09:44, 16 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
... ... ...


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