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AXEL Lite SOM/AXEL Lite Evaluation Kit/Interfaces and Connectors/UARTs

1,609 bytes added, 15:22, 27 May 2022
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<section begin="History" />
{| style="border-collapse:collapse; "
!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"|Version!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!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" |Apr 2022
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<section end="History" /><section begin="Body" />
==UARTs 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 ===
The UARTs interface available on the Evaluation Kit at are mapped to the connector ''TBDfollowing connectors:Jxxx'' * J25 is a 6x1x2. 54mm horizontal socket header for the UART4 port. This is a Digilent Pmod™ Compatible connector for the UART Pmod™ Compatiblemodule (6-Pin Pmod™ Compatible Connector Digilent Pmod™ Interface Specification Type 4 UART)
''Jxx'' [[File:AXEL Lite-EVB-PMOD-connector.png|thumb|center| 500px|PMOD configuration]]  * J21 is a ''TBD:connector-type'' header standard DB9 male connector for the RS232 two-wires UART3 configurable UART5 port, used . The board provides some configuration options for debug purposes the selection of the UART mode (bootloader and operating system serial consoleRS232/RS422/RS485 with auto-direction)  [[File:AXEL Lite-EVB-DB9-connector.png|thumb|center| 500px|DB9 configuration]]
===Signals ===
The following table tables describes the interface signals: ==== UART4 ====
{| class="wikitable"
! latexfontsize="scriptsize"| Pin#! latexfontsize="scriptsize"| SOM Pin#! latexfontsize="scriptsize"| Pin name! latexfontsize="scriptsize"| Pin function! latexfontsize="scriptsize"| Pin Notes
|-
|1,2,4,6,,7,8,10| -| NJ10.A.50 || PMOD_A0 || Clear to send | N.C.| Not connected
|-
| 32 | J1| J10.18989 || PMOD_A1 || RS232_RXTransmit data | Receive line|
|-
| 3| J1| J10.18791 || PMOD_A2 || RS232_TXReceive data | Transmit line|
|-
| 94 || J10.40 || PMOD_A3 || Request to send || | -| 5 || - || DGND|| Ground || | Ground-| 6 || - || 3V3 || +3.3 V ||
|}
 
==== UART5 ====
 
{| class="wikitable"
! latexfontsize="scriptsize" | Pin#
! latexfontsize="scriptsize" | SOM Pin#
! latexfontsize="scriptsize" | Pin name
! latexfontsize="scriptsize" | RS-232
! latexfontsize="scriptsize" | RS-422
! latexfontsize="scriptsize" | RS-485
|-
| 1 || - || Not connected || Not connected || Not connected || Not connected
|-
| 2 || J10.95 || UART5_A || UART5 receive line || UART5_A || UART5_A
|-
| 3 || J10.93 || UART5_Y || UART5 transmit line || UART5_Y || UART5_A
|-
| 4 || - || Not connected || Not connected || Not connected || Not connected
|-
| 5 || - || DGND || Ground || Ground || Ground
|-
| 6 || - || Not connected || Not connected || Not connected || Not connected
|-
| 7 || J10.105 || UART5_Z || UART5 Request To Send || UART5_Z || UART5_B
|-
| 8 || J10.107 || UART5_B || UART5 Clear To Send || UART5_B || UART5_B
|-
| 9 || - || Not connected || Not connected || Not connected || Not connected
|}
 
The J19 and J20 jumpers are used to configure the UART mode, as reported below:
 
{| class="wikitable"
! latexfontsize="scriptsize" | Jumper
! latexfontsize="scriptsize" | RS232 mode
! latexfontsize="scriptsize" | RS422 mode
! latexfontsize="scriptsize" | RS485 mode
|-
| 1-3 || open || open || closed
|-
| 5-7 || open || closed || open
|-
| 9-11 || open || closed || open
|-
| 2-4 || open || open || closed
|-
| 6-8 || open || closed || closed
|-
| 10-12 || open || closed || closed
|-
| 13-15 || open || open || closed
|-
| 14-16 || open || open || closed
|}
 
[[File:AXEL Lite-EVB-UART5-connector.png|thumb|center| 500px|J19 and J20 connectors]]
 
[[File: AXEL_Lite_-_EVK-_UART5_configuration_jumpers.jpg|500px|thumb|UART5 jumper configuration|center]]
 
=== Device mapping ===
UART3 * UART4 is mapped to <code>/dev/ttymxc2ttymxc3</code> device in Linux. The peripheral * UART5 is used as the default serial console, both for the bootloader and the kernel.mapped to <code>/dev/ttymxc4</code> device in Linux
=== Device usage ===
To connect to the debug serial port: # connect the DB9 * UART4 can be used with a PMOD adapter bracket to the J22 connector on the SBCX boardor with a TTL peripheral# connect a serial cable between DB9 connector and PC COM port through * UART5 is a NULL-modem cable MultiProtocol that support (not providedafter harware Jumper configuration)# start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200the RS232,NRS4222 or RS485 protocols. The related ''device tree file'' has to be properly configured too for enabling the GPIO transceiver configuration,8,1see [[DESK-MX6-L/Pheripherals/UART#Configuring_the_RS232.2FRS485_mode | Configuring the RS232/RS485 mode]]
----
[[Category:AXEL Lite]]
U0007
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