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In-System Programming Support
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LPC2xxx
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Slower baudrates communication (autobaud)
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Topic: Slower baudrates communication (autobaud) (Read 25040 times)
Rinin
Jr. Member
Posts: 3
Re: Slower baudrates communication (autobaud)
«
Reply #30 on:
August 04, 2017, 01:10:16 am »
It's FTDI based converter and it works fine with the same board and default firmware.
Even on 7812bps (9600*12/14.7456) because default 14.7456MHz oscillator was replaced with 12MHz
I understand that it's not flash magic issue, but default firmware works ok and 12MHz oscillator seems also starting.
Thats why I want to flash it with 12Mhz RedBoot and forget about onchip bootloader.
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Andy Ayre
ESAcademy Staff
Sr. Member
Posts: 2190
Re: Slower baudrates communication (autobaud)
«
Reply #31 on:
August 04, 2017, 03:15:52 am »
I have no idea why it can't autobaud at higher speeds. Perhaps put a scope on the Tx and Rx pins, send the '?' and see if anything looks strange. Or you could try using the high speed comms mode in Flash Magic.
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Embedded Systems Academy, Inc.
support at esacademy dot com
Rinin
Jr. Member
Posts: 3
Re: Slower baudrates communication (autobaud)
«
Reply #32 on:
August 04, 2017, 12:55:11 pm »
Thank you, Andy for fast and professional responces, it is pleasure to meet such high level of support.
Issue was in opto-isolator of my USB-UART, it worked almost fine, but slightly affected first byte only.
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Flash Magic Forum
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In-System Programming Support
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LPC2xxx
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Slower baudrates communication (autobaud)