Difference between revisions of "RS232 RS485 USB Converter Board"
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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 20:09, 24 November 2008
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
- Host Computer Setting for usb connection
- chips
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
- 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 rs232/485 converter driver
- driver in windows : http://www.hexin-tech.com.cn/
- 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.
