Difference between revisions of "Serial port"

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m (Level Shifter)
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|| '''LS MINI'''<br />
 
|| '''LS MINI'''<br />
|[[:Category:LS-WSGL/R1|LS-WSGL]]
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|[[:Category:LS-WSGL/R1|LS-WSGL]]| || ||[[Image:LS_WSGL.jpg|center|30px]]
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* [[Add a Serial port to the ARM9 Linkstation| Use bottom slot with friction fit connector]]
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* [[Add a Serial port to the LS MINI]]
* [[Use a Nokia Serial Cable on an ARM9 Linkstation| Solder cable directly to circuit board]]
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|| '''LS DUO'''<br />
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|[[:Category:LS-WTGL/R1|LS-WTGL]]| || ||[[Image:LS-WTGL-R1.jpg|center|30px]]
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* [[Add a Serial port to the LS DUO]]
 
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|| '''KUROPRO'''
 
|| '''KUROPRO'''
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|| '''TERASTATION'''
 
|| '''TERASTATION'''
 
|[[:category:Terastation|Terastation]]  
 
|[[:category:Terastation|Terastation]]  
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* [[Terastation Serial console]]
 
* [[Terastation Serial console]]

Revision as of 00:08, 8 September 2008

Model Specific Directions

Power-architecture-logo.png MIPS Logo color.png ARM Logo hires.png How to add Serial Access
LS1 HD-HLAN v1
HD-H(G).jpg
For the LS1
KURO/HG KUROBOX
Kuro-box.jpg
For Kuro/HG
HG HD-HGLAN
HD-H(G).jpg
For the HG
LS2 HD-HLAN v2
HD-H(G).jpg
For the LS2
LSPRO
LS-GL
LS-Pro.jpg
LS MINI
LS-WSGL|
LS WSGL.jpg
LS DUO
LS-WTGL|
LS-WTGL-R1.jpg
KUROPRO KUROBOX Pro
Kuro-box pro.jpg
TERASTATION Terastation
TeraStation.jpg

Level Shifter

All of the Linkstations have serial hardware built in, which they use for Linux kernel messages (console) as well as communication with the boot loader. Whilst normal RS232 uses a nominal 12 volt for communication signals, the Linkstations' serial hardware signals at 3.3v. It is therefore necessary to use a device which provides "level shifting" i.e. translates between the RS232 and 3.3v signal levels.

The cheapest and most widely available level shifters are incorporated into some mobile phone data cables (see below), however slightly more work is required to determine the pin-out of these cables than if you buy some off-the-shelf converter kits.

Build your own LVTTL/RS232 or LVTTL/USB interface

Buy a LVTTL/RS232 or LVTTL/USB interface

The cheapest TTL/RS232 converter uses a MAX232 with two serial channels for standard TTL 3V input. The cheapest TTL/USB converter uses a chip by FTDI (the same chip is used in the SCON-KIT )
ET-MINI RS232 3V.jpg MM232R.jpg
This board is made by Futurelec, however the order is shipped from Thailand so it takes 2-3 weeks to get it.

You'll also need some headers and connectors

This cable is made by FTDI, but the pinout at the connector end would need to be reassigned. Spec Sheet w/ pinout, wire colors & other info

You will also need a 4 pin header 4pinheader.gif

Parts List

Parts List

Others Others