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| Search found 4 matches |
| Author | Message |
|---|---|
 Topic: Fingerprint sensor RS232 communication |
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| Depner Replies: 18 Views: 18772 |
 Forum: General CCS C Discussion Posted: Wed Apr 16, 2008 12:20 am Subject: Working... |
So, it's working. No level converters, no nothing.  It _is_ TTL levels. I jumped on it with an oscilloscope, and there were some really beautifull 5 V signals.
The problem was a little wiring ... |
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| Topic: Fingerprint sensor RS232 communication |
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| Depner Replies: 18 Views: 18772 |
Forum: General CCS C Discussion Posted: Tue Apr 15, 2008 4:09 am Subject: Fingerprint sensor RS232 communication |
| Hi sohailkhanonline,
I'm already using Hardware UART. But if I'll use Max3232, then I must switch to sw, because hw. can not invert. As far as I know that's needed for the level translators. Thank ... |
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| Topic: Fingerprint sensor RS232 communication |
|
| Depner Replies: 18 Views: 18772 |
Forum: General CCS C Discussion Posted: Tue Apr 15, 2008 1:36 am Subject: Link for the datasheet |
| I've uploaded the datasheet, I got with the device.
Hope it's working: http://www.keepandshare.com/doc/view.php?id=512687&da=y |
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| Topic: Fingerprint sensor RS232 communication |
|
| Depner Replies: 18 Views: 18772 |
Forum: General CCS C Discussion Posted: Tue Apr 15, 2008 1:22 am Subject: Fingerprint sensor RS232 communication |
| Hi PCM programmer!
Then I was really wrong. I thought, that "TTL Levels" means I can directly connect it to the PIC, because some level converter is integrated on the device. I hope I d ... |
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