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

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==UARTs interface ==
 
==UARTs interface ==
  
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''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
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=== Description  ===
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''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
 
  
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=== Description  ===
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The UARTs interfaces are available on the Evaluation Kit at the connector J8
  
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The UARTs interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
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J8 is a 20x2x2.54mm pin header expansion connector that delivers many interfaces unused on board.
  
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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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Some interfaces could not be available in a specific model.
  
  
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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 function
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! latexfontsize="scriptsize" | Pin Notes
 
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|1,2,4,6,,7,8,10
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|7
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| -
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| J15.150
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| N.A.
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| SAI2_TXFS
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| N.C.
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| UART1_CTS
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| Not connected
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|
 
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| 3
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| 8
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| J1.189
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| J15.144
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| RS232_RX
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| SAI2_RXFS
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| Receive line
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| UART1_TXD
 
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| 3
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|10
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| J1.187
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| J15.140
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| RS232_TX
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| SAI2_RXC
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| Transmit line
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| UART1_RXD
 
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| 9
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|11
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| -
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| J15.142
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| DGND
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| SAI2_RXD0
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| Ground
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| UART1_RTS
 
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Revision as of 15:23, 6 September 2021

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History
Version Issue Date Notes
1.0.0 Sep 2021 First release


UARTs interface[edit | edit source]

Description[edit | edit source]

The UARTs interfaces are available on the Evaluation Kit at the connector J8

J8 is a 20x2x2.54mm pin header expansion connector that delivers many interfaces unused on board.

Some interfaces could not be available in a specific model.


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

Signals[edit | edit source]

The following table describes the interface signals:

Pin# SOM Pin# Pin name Pin function Pin Notes
7 J15.150 SAI2_TXFS UART1_CTS
8 J15.144 SAI2_RXFS UART1_TXD
10 J15.140 SAI2_RXC UART1_RXD
11 J15.142 SAI2_RXD0 UART1_RTS

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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