RS232 RS485 USB Converter Board

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m (ToDo)
m (ToDo)
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*get a usb to rs232/485 converter driver
 
*get a usb to rs232/485 converter driver
 
**driver in windows : http://www.hexin-tech.com.cn/
 
**driver in windows : http://www.hexin-tech.com.cn/
*re-design all PCB boards dimension
+
*re-design all PCB boards dimension following a mechanical box
 
*merge RS232 board and RS232_dspic_prog board together
 
*merge RS232 board and RS232_dspic_prog board together
 +
**using 5 pins as TTL level connection, adding one more for RS485 ctrl, and pin layouts as "signal power signal power ..."
 
*In the market, it has so many these kind of converter and very cheap price(<HK100) and they are including a small mechanical box(electronic does not complex, but mechanial box is complex), which is better than what we do by ourself.
 
*In the market, it has so many these kind of converter and very cheap price(<HK100) and they are including a small mechanical box(electronic does not complex, but mechanial box is complex), which is better than what we do by ourself.
 
[[Category:Projects]]
 
[[Category:Projects]]

Revision as of 19:09, 24 November 2008

Contents

Features

  • for low traffic and low speed application
  • mcu, RS232, RS485/RS422, slave usb all can be interchangeable.
  • usb side
    • support platform in linux with usb driver
    • simulated uart programming in application level
  • rs232 to rs485 side
    • Tested max. baudrate is 115200(i assume more high baudrate can be accepted, but i have not tested)


Technical

RS232

USB


RS485

  • chips
    • Linear Technology Corp., LTC2859 and LTC2861
    • DS3695


Circuit and PCB

OR Download here, not always updated
gEDA libraries can be download here or more updated, then modify the gafrc inside converter/
  • We have components and PCB, Or some have already soldered, if needed email to us: yan

ToDo

  • get a usb chips to uart, which with linux driver
  • linux driver
  • get a usb to rs232/485 converter driver
  • re-design all PCB boards dimension following a mechanical box
  • merge RS232 board and RS232_dspic_prog board together
    • using 5 pins as TTL level connection, adding one more for RS485 ctrl, and pin layouts as "signal power signal power ..."
  • In the market, it has so many these kind of converter and very cheap price(<HK100) and they are including a small mechanical box(electronic does not complex, but mechanial box is complex), which is better than what we do by ourself.
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