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howto:serial_connector 2006/12/06 00:33 | howto:serial_connector 2017/09/06 17:34 current | ||
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**WARNING attaching a serial port will certainly void your warranty and could destroy your unit.** | **WARNING attaching a serial port will certainly void your warranty and could destroy your unit.** | ||
- | The following information applies to version B1, there is a version B2 which may or may not be the same. J3 is the serial console connection, some units have a connector installed some do not, mine did not. | + | The following information applies to version B1, there is a version B2 which may or may not be the same. J3 is the serial console connection, some units have a Jameco catalog #420355 connector installed some do not, mine did not. The Jameco catalog number for the plug end is #420267. They are .49" headers. |
- | The serial console at J3 is a logic level signal, not RS232 used by serial ports such as those on PCs. Two approaches have been used to solve this problem. One is to use a USB serial port chip leaveing out it's RS232 converters. | + | The serial console at J3 is a logic level signal, not RS232 used by serial ports such as those on PCs. Two approaches have been used to solve this problem. One is to use a USB serial port chip leaveing out it's RS232 converters. |
- | The other which is described here is to connect up a 3.3v-to-RS232 converter such as the [[http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1780|MAX3232]]. COMPSys sells an adapter with that I.C. and supporting components on a circuit board with a DB9 connector preassembled, the [[http://www.compsys1.com/workbench/On_top_of_the_Bench/Max233_Adapter/max233_adapter.html|A232DBH3v (scroll down)]] which was used in this example. | + | The other is to connect up a 3.3v-to-RS232 converter such as the [[http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1780|MAX3232]]. COMPSys sells an adapter with that I.C. and supporting components on a circuit board with a DB9 connector preassembled, the [[http://www.compsys1.com/workbench/On_top_of_the_Bench/Max233_Adapter/max233_adapter.html|A232DBH3v (scroll down)]] which was used in this example. |
+ | |||
+ | =====Using A232DBHv3 adapter===== | ||
J3 provides 3.3v (pin 1), Transmit Data (pin 2), Receive Data (pin 3) and GND (pin 4), **I found that my 25W Weller Soldering Iron would not melt the solder in the GND through-hole so I used a different point for GND**. | J3 provides 3.3v (pin 1), Transmit Data (pin 2), Receive Data (pin 3) and GND (pin 4), **I found that my 25W Weller Soldering Iron would not melt the solder in the GND through-hole so I used a different point for GND**. | ||
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- | ===== Links ===== | + | =====Using MAX3232 or generic chip===== |
- | * [[http://forum.dsmg600.info/t67-Serial-interface.html|Forum thread]] | + | If you want to build your own serial converter, you will need the following parts: |
+ | * (5) 0.1 uF resin dipped capacitors (Monroes), 16V | ||
+ | * (1) MAX3232 IC (Maxim or generic), 3V type, 16 pin DIL | ||
+ | * (1) Right angled RS232 male socket | ||
+ | * (1) 10 element stripboard | ||
+ | * (1) 16 pin chip mount | ||
+ | * (1) Wire | ||
+ | |||
+ | {{:howto:shifter-dsmg600.jpg?w=120&h=86}} | ||
+ | |||
+ | ^ J3 Pin ^ Signal ^ | ||
+ | ^ 1 | Power (+3.3v) | | ||
+ | ^ 2 | Transmit Data (TX) | | ||
+ | ^ 3 | Receive Data (RX) | | ||
+ | ^ 4 | Ground (GND) | | ||
+ | |||
+ | =====Serial Port Settings===== | ||
+ | ^ Data ^ Settings ^ | ||
+ | ^ Baudrate |9600 | | ||
+ | ^ Data bits |8 | | ||
+ | ^ Stop bits |1 | | ||
+ | ^ Parity |None | | ||
+ | ^ Flow Control |None | | ||
+ | |||
+ | ===== Links ===== | ||
+ | * [[:talk:howto:serial_connector|Talk page with user experiences]] | ||
+ | * [[http://dns323.kood.org/forum/t67-Serial-interface.html|Forum thread]] | ||
+ | * [[http://linkstationwiki.net/index.php?title=Add_a_Serial_port_to_the_PowerPC_Linkstation|linkstationwiki.net/index.php?title=Add_a_Serial_port_to_the_PowerPC_Linkstation]] | ||
+ | * [[http://www.kurobox.com/mwiki/index.php/Add_Serial_Port|kurobox.com/mwiki/index.php/Add_Serial_Port]] | ||
* [[http://forum.openwrt.org/viewtopic.php?id=4275|Discussion about serial port at openwrt.org forum]] | * [[http://forum.openwrt.org/viewtopic.php?id=4275|Discussion about serial port at openwrt.org forum]] |