Author Topic: LPC1112 Bootloader - shared serial port  (Read 638 times)

thiagorod

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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 ?

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Andy Ayre

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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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thiagorod

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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, Ive seen some ideas to split the UART, using resistors, diodes, but this is really not recommended, right?

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Andy Ayre

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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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