will nrf24le1 impossible to design a low stanby remote controller ?

[sam]

I meet problems:

1. how to make all IO as input pull up??? like

P0DIR=0xFF;

P1DIR=0xFF;

P0CON = 0x50;

P0CON = 0x51;

..........??

how can I make all pins pull up? it seems only one pin can be pull up.

2. how can I enable all pins wake up when LOW? the key will connect pin to GND when pressed.

   OPMCON= 0x00; // unlock needed?

    WUOPC0 = 0XFF;//
   
    WUOPC1 = 0XFF;//
                                 
    OPMCON = 0x06;// lock?
   

3. how to enter standby? like following?

   PWRDWN = 0x04;

    delay(100);
    ................
   

4. is read the pin value like this?

unsigned char pin0value= P0;

unsigned char pin1value= P1;

the pin value I read is in change(not pull up all pins sucessfully?)

This is a simple function but I still can not make it working.......... so please help.

[sam]

void main(void) { P0DIR = 0xff; P1DIR = 0x3f; PWRDWN = 0; OPMCON= 0x00; P1CON = 0x50;
P1CON = 0x51;
P1CON = 0x52;
P1CON = 0x53;
P1CON = 0x54;
P1CON = 0x55;
P0CON = 0x50;
P0CON = 0x51;
P0CON = 0x52;
P0CON = 0x53;
P0CON = 0x54;
P0CON = 0x55;
P0CON = 0x56;
P0CON = 0x57;

	rf_init();								                       
 	EA=1;  
	LED1=1;
	delay(50);

	TX_Mode();								
	while (!(TX_DS|MAX_RT));				
	sta = 0;
	PD_Mode();							
	delay(50);
	
	LED1=0;   
    WUOPC0 = 0XFF; 
    WUOPC1 = 0X3F;                            
    OPMCON = 0x06;
	PWRDWN = 0x01;
 	while(1);

}

also I ve try folowing code:

void main(void) { P0 = 0x00; P1 = 0x00; P0DIR = 0xff; P1DIR = 0x3f; PWRDWN = 0; OPMCON= 0x00; P1CON = 0x50;
P1CON = 0x51;
P1CON = 0x52;
P1CON = 0x53;
P1CON = 0x54;
P1CON = 0x55;
P0CON = 0x50;
P0CON = 0x51;
P0CON = 0x52;
P0CON = 0x53;
P0CON = 0x54;
P0CON = 0x55;
P0CON = 0x56;
P0CON = 0x57;
LED1=1; delay(500);

LED1=0;   
    WUOPC0 = 0XFF; 
    WUOPC1 = 0X3F;                            
    OPMCON = 0x06;
PWRDWN = 0x01;
 	while(1);

}

it also failed to enter sleep

[sam]

but when WUOPCx inverted , they will never be able to wake up by press keys. also when wake up pwrdwn=1 should reset the mcu? but the mcu never reset.