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ARM Cortex
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LPC1112 Bootloader - shared serial port
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Topic: LPC1112 Bootloader - shared serial port (Read 96364 times)
thiagorod
Jr. Member
Posts: 3
LPC1112 Bootloader - shared serial port
«
on:
April 03, 2018, 12:29:28 PM »
Hello,
Is it still possible to program the LPC1112 via serial port (using the bootloader) even if the serial port is being used by a different IC (serial-USB converter for instance) ? Or is it necessary to add resistors to one of the branches ?
Regards,
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Andy Ayre
ESAcademy Staff
Sr. Member
Posts: 2190
Re: LPC1112 Bootloader - shared serial port
«
Reply #1 on:
April 09, 2018, 03:21:14 AM »
UART/RS232 is point-to-point and isn't designed for multiple devices to be attached to it. Use jumpers or tri-state outputs instead.
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Embedded Systems Academy, Inc.
support at esacademy dot com
thiagorod
Jr. Member
Posts: 3
Re: LPC1112 Bootloader - shared serial port
«
Reply #2 on:
April 10, 2018, 12:32:34 PM »
Thanks for you reply Andy.
I agree with that, I´ve seen some ideas to split the UART, using resistors, diodes, but this is really not recommended, right?
Regards,
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Andy Ayre
ESAcademy Staff
Sr. Member
Posts: 2190
Re: LPC1112 Bootloader - shared serial port
«
Reply #3 on:
April 11, 2018, 01:46:51 AM »
I wouldn't recommend it.
Andy
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Embedded Systems Academy, Inc.
support at esacademy dot com
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LPC1112 Bootloader - shared serial port