LPCXpresso IDE中的主题 PIO1_11 does not read correctly

PIO1_11 does not read correctly

lpcware — Thu, 16 Jun 2016 02:38:29 GMT

Content originally posted in LPCWare by syed on Wed Jun 15 10:00:05 MST 2011
Hi All,

            I am using LPC1114 in my project. I am trying to set PIO1_11 as digital input and and it does not read the correctly.

I have initialised the pin direction correctly which I can confirm using the debugger. The pin is tied to a 3V3 line. [B]I am getting the pin status as low. The pin status read using the debugger is also low but I can see using [COLOR=Red]oscilloscope that its high[/COLOR][/B].

I have tried this on the LPC Expresso board (LPC1114)

#define HDW_IP_BTN_P_11_BIT            11
bool
GIO_get_p1_11(
    void
) {
    bool status;

    status = (LPC_GPIO1->DATA & ( 1 << HDW_IP_BTN_P_11_BIT)) ? FALSE : TRUE;

    return status;
}

Can anyone please let me know whats happening ?

Regards,
Syed

Re: PIO1_11 does not read correctly

lpcware — Thu, 16 Jun 2016 02:38:30 GMT

Content originally posted in LPCWare by Ex-Zero on Wed Jun 15 10:17:16 MST 2011
LPC_IOCON->PIO1_11?

Quote:
The pin is tied to a 3V3 line

I hope you've used a resistor :eek:

 LPC_IOCON->PIO1_11 = 0xD0;

should reset IOCON (with pull-up)

Re: PIO1_11 does not read correctly

lpcware — Thu, 16 Jun 2016 02:38:30 GMT

Content originally posted in LPCWare by syed on Wed Jun 15 10:32:37 MST 2011
Solved. Was not setting the Digital functional mode.

Regards,
Syed