Difference between revisions of "RS232 RS485 USB Converter Board"

Revision as of 07:28, 5 March 2010

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)

get a usb chips to uart, which with linux driver
- MCT P87C52UBAA(http://pfranc.com/usb/usb.mhtml)
- cypress, PSoC with USB
linux driver
- driver in linux : http://ftdi-usb-sio.sourceforge.net/
- 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
- driver in Windows XP, Vista, Linux, MAC : http://www.hexin-technology.com/
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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 **[http://chungyan5.no-ip.org/WebServerDocs/open_data/KnowledgeDb/ComputerSysDevelopment/apps/comm/converter/DS3695.pdf DS3695]
-===Circuit and PCB===
-*[http://chungyan5.no-ip.org/vc/?root=converter gEDA Project Files]
-:OR [[Media:Converter.zip|Download here, not always updated]]
-:gEDA libraries can be download [http://www.opencircuits.com/PCB_Footprints here] or [http://chungyan5.no-ip.org/open_data/electronic_computer/eda/geda/libs more updated], then modify the gafrc inside converter/
-*We have components and PCB, Or some have already soldered, if needed email to us: [mailto:yan@amonics.com yan]
 ==ToDo==