WVR的串口线到底怎么接？附Pl2302的最新驱动

mysy

WVR的串口线到底怎么接？

我按照之前的帖子作的

Pl 2302 的线  一个接上了显示乱码 速率是115200
另外一个不显示

请高手确认

mysy

没有这个线都没法上ＵＳＢ啊

mysy

自己顶一下

怎么没人哩？

mysy

自己找到了


1. Serial Console
Serial ports allow you to do a myriad of things, including connect to your computer, connect to other devices such as LCDs and GPSes, etc... With a little programming, you could even connect a bunch of routers together. This mod doesn't add serial ports; those are already there. This just makes them much easier to use with just about any hardware you want.

For the developer, a serial port will also allow you to recover a bricked router when all other methods have failed (tftp, failsafe mode, shorting pins, etc.)

I recommend using a usb serial console, as its much easier and cheaper.


1.1. Serial port pinouts
Pinouts for your model can often be found on your model's page in CategoryModel.


1.2. USB Kit
A USB based data cable for a mobile cell phone is another possibility.

note: For the serial console on a WRT54G with a USB cell phone cable, the following pins are used: 4(tx), 6(rx), 10(gnd)

Compatible Radio Shack (Future Dial) "Mobile Phone Data Cables":

- LG Models 1200, VI5225, VX4500, VX4600, VX600 - Audiovox Models 8200, 8500 and 8600 - Nokia Models 3285 and 5185 - Cable 22 (For Nokia 3100, 3200, 3585i, 3588 and others with Nokia 14-pin pop-port)
goobay

- Datacable for Nokia 6210, 6250, 6310, 6310i, 7110
reference: http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort


1.3. Home-made RS-232 kit
Background

Most OpenWrt compatible devices have one or two* serial ports on the router's PCB (printed circuit board). The problem is they operate on 3.3V, which means they will get fried if you connect them to your computer's serial port, which operates at 12V. Luckily, this is more common a thing than you would think, and as such, Maxim (no, not the magazine) has made a few handy little ICs for us to use. The best (IMHO) is the MAX233, or more specifically, the MAX233a, which has a higher speed capacity and uses less power. This guide will tell you how to solder everything together to get a pc-compatible serial port on your OpenWrt router.

http://jdc.parodius.com/wrt54g/serial.html

http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort

http://www.rwhitby.net/wrt54gs/serial.html

This electronic adaptator is call RS232-TTL converter. You can find it at many places whith this name.

A great source for RS232-TTL convertors is in cell phone serial cables. Most cell phones need this same circuit to level-up for connection to a PC's serial port. Many people already have such a cable laying around, or can buy one fairly cheap. It is much easier than building the necessary circuit yourself.

If you open up the cell phone cable's serial port casing and see a MAX### chip, it's probably the cable you need. One known chip is a MAX323 (yes, 323).

If you've found a good cell phone cable to use, you merely need to determine which wires are the VCC, GND, TX, and RX connections. Usually the VCC is red and the GND is black, but the other colors may vary (though blue and orange are common). There should be no need to modify the PCB embedded in the cable.

You can also search for MAX232 Kits. There are some kits availables.

http://cgi.ebay.fr/RS232-to-TTL- ... QrdZ1QQcmdZViewItem,

http://www.elv-downloads.de/serv ... LRS232-Umsetzer.pdf

http://www.compsys1.com/workbenc ... max233_adapter.html

*Note: The WRT54G/GS CFE only emit messages on TTSY0. This is the serial port that uses even numbered pins, therefore starting at pin 2.


1.4. Terminal software
Hyperterm (comes with many versions of MS Windows)
Minicom (for POSIX systems)
picocom

cu(1) (part of the Taylor UUCP package, for POSIX systems)
Tutty (a branch of Putty)

1.5. Finding Serial Console
First, check the OpenWRT wiki page describing your hardware and do a google search. Most of the time, the serial port(s), if they exist, have already been documented by others.

(stolen from the AR7Port page) This method used to find the serial port was suggested to me on irc; use a piezo buzzer and attach it's ground (usually black) wire to a ground point on the router - the back of the power regulators are usually good candidates, but check this with a multimeter/voltmeter... Use the other wire to probe any of the header pins which may be pre-installed, or any of the component holes which look like they could have header pins installed into. Once you get the right pin, the piezo should make a screeching sound much like that of a 56kbps connection.

Make sure you reset the router after probing each pin. The bootloader/linux bootup messages will only happen for a few seconds, after that the serial console will be silent - so even if you have the right pin you will not hear anything.

A more accurate method would be to use either a logic analyzer or an oscilloscope, but these are expensive and for the basic task of locating a serial pin a little overkill.

mysy

终于买个一个能看到串口消息的转接头了～

哎呀

猜不多买　恩山哪个了

howardhu

OMG太复杂了，晕

mysy

今晚开始继续改机事宜

mqh871154

下个驱动用用