Editing RS232 RS485 USB Converter Board

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==Features==
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Hello!
<!--<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"];
 
    mcu -> comm [dir = both];
 
    comm -> RS232 [dir = both];
 
    comm -> rs485_422 [dir = both];
 
    comm -> usb [dir = both];
 
}
 
</graphviz>-->
 
*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==
 
==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]
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===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]
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===RS485===
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*chips
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**Linear Technology Corp., LTC2859 and LTC2861
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**[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
*get a USB to RS-232/RS-485 converter driver ,PCI/PCI-Express TO RS-232/RS-485/RS-422 Driver
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*re-design all PCB boards dimension following a mechanical box
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[[Category:Projects]]
*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]]
 

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