Internal Pull Up LPCXpresso 11C24

lpcware — Wed, 15 Jun 2016 22:28:17 GMT

Content originally posted in LPCWare by f_acosta on Mon Apr 07 17:17:09 MST 2014
Hi, I'm trying to deactivate the internal pull-ups from my LPCXpresso but I change the bit in the IOCON register and nothing changes.
This is my method :

LPC_IOCON->PIO2_2 &= ~(1<<4);

the User manual says that you must clear the 3:4 bits to deactivate internall pull ups.

And completely this is how I configure the GPIO

LPC_GPIO2 -> &= ~(1 << 2) //Set as output
LPC_IOCON -> PIO2_2 &= ~(1<<4); //Deactivate pull up

IOCON reset state is as GPIO and Pull up activated

What's wrong?

Thanks for your help.

Re: Internal Pull Up LPCXpresso 11C24

lpcware — Wed, 15 Jun 2016 22:28:18 GMT

Content originally posted in LPCWare by 1234567890 on Mon Jun 09 00:24:23 MST 2014

Quote:

What's wrong?

Probably you didn't set bit 16 (IOCON) in SYSAHBCLKCTRL.

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Internal Pull Up LPCXpresso 11C24

Re: Internal Pull Up LPCXpresso 11C24