LPCXpresso IDE中的主题 Re: Problem with the PIO0_4

Problem with the PIO0_4

lpcware — Thu, 16 Jun 2016 01:30:15 GMT

Content originally posted in LPCWare by nasib on Mon Dec 17 09:21:27 MST 2012
Hi all!

I have a little problem with the PIO0_4. I want to use it as a Standard IO Port ( not as an I2C Port). So i configure it as the Datasheet says (User Manual, 66):

LPC_IOCON->PIO0_4 &= ~0x0FFF;
LPC_IOCON->PIO0_4 |= 0x0180;

But i already can't use it like a GPIO.

Is this configuration correct?.

(I have the same problem with the other I2C pin, PIO0_5)

Thank you so much!

Re: Problem with the PIO0_4

lpcware — Thu, 16 Jun 2016 01:30:16 GMT

Content originally posted in LPCWare by serge on Mon Dec 17 09:34:25 MST 2012
These pins are true open collector pins:eek:. Did you already connect some pullup resistors?:rolleyes:

Re: Problem with the PIO0_4

lpcware — Thu, 16 Jun 2016 01:30:17 GMT

Content originally posted in LPCWare by nasib on Mon Dec 17 09:45:43 MST 2012
Uff! i didn't! thanks!