IoTGateway/BSP/Android/Gettingstarted/How to use UART for rk - Revision history

Wei.zeng at 09:11, 11 June 2024

2024-06-11T09:11:08Z

Wei.zeng at 05:12, 25 April 2018

2018-04-25T05:12:40Z

Wei.zeng at 02:21, 11 April 2018

2018-04-11T02:21:31Z

Wei.zeng at 02:21, 11 April 2018

2018-04-11T02:21:00Z

Wei.zeng at 03:25, 16 November 2017

2017-11-16T03:25:17Z

Wei.zeng at 03:24, 16 November 2017

2017-11-16T03:24:10Z

Wei.zeng: Created page with "= '''Overview''' = The Android/Linux UART/serial port a..."

2017-11-16T03:22:57Z

Created page with "= '''Overview''' = The Android/Linux UART/serial port a..."

New page

= '''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. Our modules provide the following support:

Enable the RS-485 feature by either using ioctrl ''TIOCSRS485'' from user space as described in [https://github.com/ADVANTECH-Corp/linux-imx6/blob/imx_4.1.15_1.0.0_ga/Documentation/serial/serial-rs485.txt RS-485 Kernel Documentation].

 

= '''Boards''' =

== RSB4680 Borad ==

{| style="width: 500px" cellspacing="1" cellpadding="1" border="1" align="left"
|-
! scope="col" | '''COM Name'''
! scope="col" | '''Device''' 
! scope="col" |
'''RS485 support'''

|-
| COM1 
| /dev/ttyS2 
| 
|-
| COM2 
| /dev/ttyS4 
| Yes 
|-
| COM3 
| 
| 
|-
| COM4 
| 
| 
|-
| COM5 
| 
| 
|-
| COM6 
| 
| 
|}

 

[[File:ROM3420 COM.png|252x213px|ROM3420 COM.png]]

@@ Line 1: / Line 1: @@
 = <span style="color: rgb(0, 0, 205)">'''<span style="font-size: large">Overview</span>'''</span> =
@@ Line 11: / Line 12: @@
 == RSB4680 Borad ==
-{| style="width: 500px" cellspacing="1" cellpadding="1" border="1" align="left"
+{| align="left" border="1" cellpadding="1" cellspacing="1" style="width: 500px"
 |-
-! scope="col" | '''COM Name'''
+! scope="col" |
-! scope="col" | '''Device Node'''<br/>
+COM Name
 ! scope="col" |
 '''Remark'''
 |-
-| style="text-align: center" | UART0<br/>
+| style="text-align: center" | N/A
-| style="text-align: center" | /dev/ttyS0<br/>
+| style="text-align: center" | UART0
-| for BT Data<br/>
+| style="text-align: center" | /dev/ttyS0
 |-
-| style="text-align: center" | COM1<br/>
+| style="text-align: center" | COM5
-| style="text-align: center" | /dev/ttyS1<br/>
+| style="text-align: center" | COM1
-| <br/>
+| style="text-align: center" | /dev/ttyS1
 |-
-| style="text-align: center" | COM2<br/>
+| style="text-align: center" | COM1
-| style="text-align: center" | /dev/ttyS2<br/>
+| style="text-align: center" | COM2
-| Debug Port<br/>
+| style="text-align: center" | /dev/ttyS2
 |-
-| style="text-align: center" | COM3<br/>
+| style="text-align: center" | COM6
-| style="text-align: center" | /dev/ttyS3<br/>
+| style="text-align: center" | COM3
-| <br/>
+| style="text-align: center" | /dev/ttyS3
 |-
-| style="text-align: center" | COM4<br/>
+| style="text-align: center" | COM2
-| style="text-align: center" | /dev/ttyS4<br/>
+| style="text-align: center" | COM4
-| Supprot RSB485<br/>
+| style="text-align: center" | /dev/ttyS4
 |-
-| style="text-align: center" | COM6<br/>
+| style="text-align: center" | COM3
-| style="text-align: center" | /dev/ttyUSB0<br/>
+| style="text-align: center" | COM6
-| Usb to Uart<br/>
+| style="text-align: center" | /dev/ttyUSB0
 |-
-| style="text-align: center" | COM7<br/>
+| style="text-align: center" | COM4
-| style="text-align: center" | /dev/ttyUSB1<br/>
+| style="text-align: center" | COM7
-| Usb to Uart<br/>
+| style="text-align: center" | /dev/ttyUSB1
 |}
 &nbsp;
 [[File:RS232andRS485Jumper.PNG|RTENOTITLE]]

@@ Line 39: / Line 39: @@
 | Supprot RSB485<br/>
 |-
-| style="text-align: center" | COM5<br/>
+| style="text-align: center" | COM6<br/>
 | style="text-align: center" | /dev/ttyUSB0<br/>
 | Usb to Uart<br/>
 |-
-| style="text-align: center" | COM6<br/>
+| style="text-align: center" | COM7<br/>
 | style="text-align: center" | /dev/ttyUSB1<br/>
 | Usb to Uart<br/>

← Older revision		Revision as of 02:21, 11 April 2018
Line 74:		Line 74:


−	[[File:RS232andRS485Jumper.PNG]]	+	[[File:RS232andRS485Jumper.PNG\|RTENOTITLE]]

@@ Line 5: / Line 5: @@
 == <span style="font-size: medium"><font color="#0066cc">RS-485</font></span> ==
 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.
 = '''<span style="font-size: large"><span style="color: rgb(0, 0, 205)">Boards</span></span>''' =
@@ Line 14: / Line 14: @@
 |-
 ! scope="col" | '''COM Name'''
-! scope="col" | '''Device'''<br/>
+! scope="col" | '''Device Node'''<br/>
 ! scope="col" |
-'''RS485 support'''
+'''Remark'''
 |-
-| COM1<br/>
+| style="text-align: center" | UART0<br/>
-| /dev/ttyS2<br/>
+| style="text-align: center" | /dev/ttyS0<br/>
 | <br/>
 |-
-| COM2<br/>
+| style="text-align: center" | COM2<br/>
-| /dev/ttyS4<br/>
+| style="text-align: center" | /dev/ttyS2<br/>
-| Yes<br/>
+| Debug Port<br/>
 |-
-| COM3<br/>
+| style="text-align: center" | COM3<br/>
-| <br/>
+| style="text-align: center" | /dev/ttyS3<br/>
 | <br/>
 |-
-| COM4<br/>
+| style="text-align: center" | COM4<br/>
-| <br/>
+| style="text-align: center" | /dev/ttyS4<br/>
-| <br/>
+| Supprot RSB485<br/>
 |-
-| COM5<br/>
+| style="text-align: center" | COM5<br/>
-| <br/>
+| style="text-align: center" | /dev/ttyUSB0<br/>
-| <br/>
+| Usb to Uart<br/>
 |-
-| COM6<br/>
+| style="text-align: center" | COM6<br/>
-| <br/>
+| style="text-align: center" | /dev/ttyUSB1<br/>
-| <br/>
+| Usb to Uart<br/>
 |}
@@ Line 56: / Line 60: @@
-&nbsp;[[File:ROM3420 COM.png|252x213px|ROM3420 COM.png]]
+&nbsp;

@@ Line 5: / Line 5: @@
 == <span style="font-size: medium"><font color="#0066cc">RS-485</font></span> ==
-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. Our modules provide the following support:
+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.
 = '''<span style="font-size: large"><span style="color: rgb(0, 0, 205)">Boards</span></span>''' =

@@ Line 8: / Line 8: @@
 Enable the RS-485 feature by either using ioctrl ''TIOCSRS485'' from user space as described in [https://github.com/ADVANTECH-Corp/linux-imx6/blob/imx_4.1.15_1.0.0_ga/Documentation/serial/serial-rs485.txt <font color="#0066cc">RS-485 Kernel Documentation</font>].
 = '''<span style="font-size: large"><span style="color: rgb(0, 0, 205)">Boards</span></span>''' =
@@ Line 60: / Line 58: @@
-&nbsp;
+&nbsp;[[File:ROM3420 COM.png|252x213px|ROM3420 COM.png]]