RS232 RS485 USB Converter Board

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(Circuit and PCB)
(ToDo)
 
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Hello!
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==Features==
Excellent site, but most of messages here are not related to its contents...
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<!--<graphviz>
 
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digraph blks_conn {
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    mcu [shape=box, label="mcu"];
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    RS232 [shape=box, label="rs232"];
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    rs485_422 [shape=box, label="rs485/422"];
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    usb [shape=box, label="slave usb"];
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    comm [shape=box, label="common wires"];
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    mcu -> comm [dir = both];
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    comm -> RS232 [dir = both];
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    comm -> rs485_422 [dir = both];
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    comm -> usb [dir = both];
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}
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</graphviz>-->
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*for low traffic and low speed application
 +
*mcu, RS232, RS485/RS422, slave usb all can be interchangeable.
 +
*usb side
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**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==
 
==Technical==
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===RS232===
 
===RS232===
 
*[http://www.realhamradio.com/tac32-interface.htm RS232 Circuit examples]
 
*[http://www.realhamradio.com/tac32-interface.htm RS232 Circuit examples]
 
  
 
===USB===
 
===USB===
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*chips
 
*chips
 
**[http://chungyan5.no-ip.org/WebServerDocs/open_data/KnowledgeDb/ComputerSysDevelopment/apps/comm/converter/ds2232c_15.pdf ds2232c]
 
**[http://chungyan5.no-ip.org/WebServerDocs/open_data/KnowledgeDb/ComputerSysDevelopment/apps/comm/converter/ds2232c_15.pdf ds2232c]
 
 
===RS485===
 
*chips
 
**Linear Technology Corp., LTC2859 and LTC2861
 
**[http://chungyan5.no-ip.org/WebServerDocs/open_data/KnowledgeDb/ComputerSysDevelopment/apps/comm/converter/DS3695.pdf DS3695]
 
 
 
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==ToDo==
 
==ToDo==
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*linux driver
 
*linux driver
 
**driver in linux : http://ftdi-usb-sio.sourceforge.net/
 
**driver in linux : http://ftdi-usb-sio.sourceforge.net/
 +
**USB and [http://www.usconverters.com/index.php?main_page=index&cPath=65 RS232 to RS485 converter] designs for Linux and Windows 7 64-bit
 
**usb in linux guide : http://www.linux-usb.org/USB-guide/book1.html
 
**usb in linux guide : http://www.linux-usb.org/USB-guide/book1.html
 
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*get a USB to RS-232/RS-485 converter driver ,PCI/PCI-Express TO RS-232/RS-485/RS-422 Driver
[[Category:Projects]]
+
*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.
 +
[[Category:Projects]][[category:Serial Communications]]

Latest revision as of 07:00, 14 January 2012

Contents

[edit] 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)

[edit] Technical

[edit] RS232

[edit] USB

[edit] ToDo

  • get a usb chips to uart, which with linux driver
  • linux driver
  • get a USB to RS-232/RS-485 converter driver ,PCI/PCI-Express TO RS-232/RS-485/RS-422 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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