Difference between revisions of "IoTGateway/BSP/Android/Gettingstarted/How to use UART for rk"

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= <span style="color: rgb(0, 0, 205)">'''<span style="font-size: large">Overview</span>'''</span> =
 
= <span style="color: rgb(0, 0, 205)">'''<span style="font-size: large">Overview</span>'''</span> =
  
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== RSB4680 Borad ==
 
== RSB4680 Borad ==
  
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{| style="width: 500px" cellspacing="1" cellpadding="1" border="1" align="left"
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{| align="left" border="1" cellpadding="1" cellspacing="1" style="width: 500px"
 
|-
 
|-
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! scope="col" | '''COM Name'''
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! scope="col" |  
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! scope="col" | '''Device Node'''<br/>
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COM Name
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 +
(EPC-R4680)
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! scope="col" |
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'''HW Schematic'''
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'''(RSB-4680)'''
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! scope="col" | '''Device Node'''
 
! scope="col" |  
 
! scope="col" |  
 
'''Remark'''
 
'''Remark'''
  
 
|-
 
|-
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| style="text-align: center" | UART0<br/>
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| style="text-align: center" | N/A
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| style="text-align: center" | /dev/ttyS0<br/>
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| style="text-align: center" | UART0
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| for BT Data<br/>
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| style="text-align: center" | /dev/ttyS0
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| for BT Data
 
|-
 
|-
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| style="text-align: center" | COM1<br/>
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| style="text-align: center" | COM5
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| style="text-align: center" | /dev/ttyS1<br/>
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| style="text-align: center" | COM1
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| <br/>
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| style="text-align: center" | /dev/ttyS1
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| RS232
 
|-
 
|-
−
| style="text-align: center" | COM2<br/>
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| style="text-align: center" | COM1
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| style="text-align: center" | /dev/ttyS2<br/>
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| style="text-align: center" | COM2
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| Debug Port<br/>
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| style="text-align: center" | /dev/ttyS2
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| Debug Port/RS232
 
|-
 
|-
−
| style="text-align: center" | COM3<br/>
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| style="text-align: center" | COM6
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| style="text-align: center" | /dev/ttyS3<br/>
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| style="text-align: center" | COM3
−
| <br/>
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| style="text-align: center" | /dev/ttyS3
 +
| RS232
 
|-
 
|-
−
| style="text-align: center" | COM4<br/>
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| style="text-align: center" | COM2
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| style="text-align: center" | /dev/ttyS4<br/>
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| style="text-align: center" | COM4
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| Supprot RSB485<br/>
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| style="text-align: center" | /dev/ttyS4
 +
| Supprot RSB485
 
|-
 
|-
−
| style="text-align: center" | COM6<br/>
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| style="text-align: center" | COM3
−
| style="text-align: center" | /dev/ttyUSB0<br/>
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| style="text-align: center" | COM6
−
| Usb to Uart<br/>
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| style="text-align: center" | /dev/ttyUSB0
 +
| Usb to Uart
 
|-
 
|-
−
| style="text-align: center" | COM7<br/>
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| style="text-align: center" | COM4
−
| style="text-align: center" | /dev/ttyUSB1<br/>
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| style="text-align: center" | COM7
−
| Usb to Uart<br/>
+
| style="text-align: center" | /dev/ttyUSB1
 +
| Usb to Uart
 
|}
 
|}
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
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&nbsp;
  
 
&nbsp;
 
&nbsp;
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[[File:RS232andRS485Jumper.PNG|RTENOTITLE]]
 
[[File:RS232andRS485Jumper.PNG|RTENOTITLE]]

Latest revision as of 10:11, 11 June 2024

Overview

The Android/Linux UART/serial port access from user is through the tty-devices. The tty-devices have different names depending on UART driver on different board.

RS-485

RS-485 uses half-duplex communication, which means that one medium is shared for transmitting and receiving data. Therefore the system needs to control the RS-485 transceiver's transmit mode. Usually the UART RTS signal is used to switch the transmitter on and off.

Boards

RSB4680 Borad

COM Name

(EPC-R4680)

HW Schematic

(RSB-4680)

Device Node

Remark

N/A UART0 /dev/ttyS0 for BT Data
COM5 COM1 /dev/ttyS1 RS232
COM1 COM2 /dev/ttyS2 Debug Port/RS232
COM6 COM3 /dev/ttyS3 RS232
COM2 COM4 /dev/ttyS4 Supprot RSB485
COM3 COM6 /dev/ttyUSB0 Usb to Uart
COM4 COM7 /dev/ttyUSB1 Usb to Uart

 

 

 

 

 

 

 

 

 

 

 

 

 

RTENOTITLE

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