#41302 - Pinczakko - Wed Apr 27, 2005 10:05 am
I'm just getting started with GBA. Known the software development aspect of GBA and have tested some of my code in VBA.
I'm planning to interface GBA to PC through RS-232 interface. But I'm not sure what kind of hardware needed for that, is a voltage converter (e.g. MAX232 IC) enough?
Anyway, I haven't buy the GBA yet, so I can't measure the output voltage of the GBA.
I keen to know some hardware specs before I invest my money on that toy to play with it as an "electronics playground".
Sorry if this is a repeated question. I've searched the forum with no specific explanation on the voltage level issue.
TIA
Pinczakko
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#41317 - tepples - Wed Apr 27, 2005 2:59 pm
RS232: signaling levels are +12V and -12V.
GBA: signaling levels are +3.3V and 0. (EDIT: corrected)
But the easiest way to interface the PC's serial port with GBA's UART mode is through an MBV2 cable purchased at lik-sang.com.
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Last edited by tepples on Fri Apr 29, 2005 3:05 pm; edited 1 time in total
#41503 - Spektre - Fri Apr 29, 2005 6:21 am
Tepples,
My sincere apology if this is wrong as I have not scoped my GBA port but aren't the gba signalling levels +3.3 and 0?
Spektre
#41515 - wintermute - Fri Apr 29, 2005 10:52 am
#41535 - tepples - Fri Apr 29, 2005 3:08 pm
| Spektre wrote: |
| but aren't the gba signalling levels +3.3 and 0? |
You're right. What was I smoking? Or have I been playing too much luminesweeper?
_________________
-- Where is he?
-- Who?
-- You know, the human.
-- I think he moved to Tilwick.
#42911 - ZeroX - Mon May 16, 2005 5:23 pm
Pinczakko : U might have better luck using the parrelel port, high 5V and low 0V. Easier to work with. Check out the xboo cable. works great, but small apps only.
#42912 - arundel - Mon May 16, 2005 5:41 pm
A 'dumb' parallel port cable is probably the easiest cable to assemble. I would go for Martin Korth's XBOO cable: www.work.de/nocash
If you want to build a RS232 cable check out Matt's site. He's also letting you download the sources the software: www.axio.ms/projects/GBA/
But for a RS232 cable you will defenately need a microcontroller chip of some sort.
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#48136 - pmhunt - Sun Jul 17, 2005 2:59 pm
I found this website that sale GBA to RS232 (UART) cables ready made
http://www.koolgsm.co.uk/product_info-52_38+1084.html
#127046 - istage - Sun Apr 29, 2007 3:56 pm
using a max3232 which volatage is 3.3v,but not max232 (supply volatage is 5v).
connect SI,SO to Rx,tx ,and DB9,2,3,5(GND).
and the software is ,setup a BPS as 9600,115200...and the interrupt.
send data to transmitte register.
read data from receive register.
that's it.
#127076 - Diddl - Sun Apr 29, 2007 9:45 pm
| istage wrote: |
using a max3232 which volatage is 3.3v,but not max232 (supply volatage is 5v).
connect SI,SO to Rx,tx ,and DB9,2,3,5(GND).
and the software is ,setup a BPS as 9600,115200...and the interrupt.
send data to transmitte register.
read data from receive register.
that's it. |
yes, and you also can get this cable from ebay by a UK seller, it works fine.
#127106 - pmhunt - Mon Apr 30, 2007 12:41 am