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It works fine, but if I close serial port and re-connect with PC
without
making anything on LPC, weird data appears at PC. If I reset LPC, it turns to normal.
It happens with CrossWorks terminal window and my own serial
port monitor software 'common'.
Any opinion?
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CrossWorks UART example
Started by ●February 21, 2004
Reply by ●February 21, 20042004-02-21
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I assume that the serial data is being sent at full rate, so it appears as a synchronous stream. In this case, with no pauses, it's possible for the UART to sync to a non-start/stop bit. If you send your data in bursts, you'll see possible some garbage data, and then the UART syncs when it sees the stop and start bits with a bit of a breather in between. -- Paul. -----Original Message----- From: gokbektas [mailto:] Sent: 21 February 2004 19:11 To: Subject: [lpc2000] CrossWorks UART example It works fine, but if I close serial port and re-connect with PC without making anything on LPC, weird data appears at PC. If I reset LPC, it turns to normal. It happens with CrossWorks terminal window and my own serial port monitor software 'common'. Any opinion? ----- g eti ----- Kimden : Kime : Gderme tarihi : 21/02/2004 13:18 Konu : [lpc2000] Res:LPC2106 Programming - ISP - Solved I retouched with the soldering iron to pins of baby, compare function or ISP utility confirms chip is programmed. Leon, your code sent garbage characters at 9600 baud, I tried other baud rates also... Then I recompiled uart example of crossworks then loaded to chip... It is working! Now, I can play ;-) Thanks a lot! I'll upload my board's picture to my personal website soon. ----- g eti ----- Kimden : Kime : Gderme tarihi : 21/02/2004 12:57 Konu : Re: Re: [lpc2000] LPC2106 Programming - ISP and hex file ----- Original Message ----- From: "gokbektas" < <http://webmail.mynet.com/webmail/src/compose.php?send_to=gokbektas%40my net.com&unique_id/a744d63c8fb6e397f540fb7ed4a88f> > To: < <http://webmail.mynet.com/webmail/src/compose.php?send_to=lpc2000%40yaho ogroups.com&unique_id/a744d63c8fb6e397f540fb7ed4a88f> > Sent: Saturday, February 21, 2004 10:18 AM Subject: Ynt: Re: [lpc2000] LPC2106 Programming - ISP and hex file > Thanks leon, > I tried the hex file that you sent me. > > I read 4293984050 part ID and 1.3 bootloader ID, when I click Upload to Flash, it > does not give any error messages, a progress bar shows it is uploading. > > When I click Compere Flash, a progress bar shows it is reading but "File compare Fail" > message appears at the end. > > And there is no data coming from chip when I check it with terminal window... It looks like you have a problem with the flash memory. I'd replace the chip, or try another board if you have one. I'm actually using a '2104, but it shouldn't make any difference. Regards, Leon <http://docs.yahoo.com/info/terms/ Click HereClick Here <http://us.adserver.yahoo.com/l?M'4551.4550177.5761904.1261774/D=egrou pweb/S=:HM/A 19528/rand#4930562 _____ > . |
Reply by ●February 21, 20042004-02-21
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Paul's right. What he means is that if you start up your terminal SW while the serial data is being output from the LPC, it will interpret the first high-> low transition on its RXD line as a start bit. If the data being transmitted from the LPC doesn't have a pause between stop bit and the next start bit, the UART in your PC won't synchronise properly. To "fall in" the datastream, the transmitted data must have at least 9 High bits, so the PC's UART can flush out its receive shift register, and sync properly. -- Kris ----- Original Message ----- From: "Paul Curtis" <> To: <> Sent: Sunday, February 22, 2004 7:59 AM Subject: RE: [lpc2000] CrossWorks UART example I assume that the serial data is being sent at full rate, so it appears as a synchronous stream. In this case, with no pauses, it's possible for the UART to sync to a non-start/stop bit. If you send your data in bursts, you'll see possible some garbage data, and then the UART syncs when it sees the stop and start bits with a bit of a breather in between. -- Paul. -----Original Message----- From: gokbektas [mailto:] Sent: 21 February 2004 19:11 To: Subject: [lpc2000] CrossWorks UART example It works fine, but if I close serial port and re-connect with PC without making anything on LPC, weird data appears at PC. If I reset LPC, it turns to normal. It happens with CrossWorks terminal window and my own serial port monitor software 'common'. Any opinion? ----- g eti ----- Kimden : Kime : Gderme tarihi : 21/02/2004 13:18 Konu : [lpc2000] Res:LPC2106 Programming - ISP - Solved I retouched with the soldering iron to pins of baby, compare function or ISP utility confirms chip is programmed. Leon, your code sent garbage characters at 9600 baud, I tried other baud rates also... Then I recompiled uart example of crossworks then loaded to chip... It is working! Now, I can play ;-) Thanks a lot! I'll upload my board's picture to my personal website soon. ----- g eti ----- Kimden : Kime : Gderme tarihi : 21/02/2004 12:57 Konu : Re: Re: [lpc2000] LPC2106 Programming - ISP and hex file ----- Original Message ----- From: "gokbektas" < <http://webmail.mynet.com/webmail/src/compose.php?send_to=gokbektas%40my net.com&unique_id/a744d63c8fb6e397f540fb7ed4a88f> > To: < <http://webmail.mynet.com/webmail/src/compose.php?send_to=lpc2000%40yaho ogroups.com&unique_id/a744d63c8fb6e397f540fb7ed4a88f> > Sent: Saturday, February 21, 2004 10:18 AM Subject: Ynt: Re: [lpc2000] LPC2106 Programming - ISP and hex file > Thanks leon, > I tried the hex file that you sent me. > > I read 4293984050 part ID and 1.3 bootloader ID, when I click Upload to Flash, it > does not give any error messages, a progress bar shows it is uploading. > > When I click Compere Flash, a progress bar shows it is reading but "File compare Fail" > message appears at the end. > > And there is no data coming from chip when I check it with terminal window... It looks like you have a problem with the flash memory. I'd replace the chip, or try another board if you have one. I'm actually using a '2104, but it shouldn't make any difference. Regards, Leon <http://docs.yahoo.com/info/terms/ Click HereClick Here <http://us.adserver.yahoo.com/l?M'4551.4550177.5761904.1261774/D=egrou pweb/S=:HM/A 19528/rand#4930562 _____ > . Yahoo! Groups Links |
