nRF24LE1 deep sleep high current

RE: nRF24LE1 deep sleep high current

Hisyam Faiz — Thu, 23 Jan 2020 04:53:56 GMT

Hi hakan, I have a problem with wake-up from RTC. could you help me ? or you have a example code ?

RE: nRF24LE1 deep sleep high current

uldara — Tue, 13 Feb 2018 09:28:17 GMT

it work now thank you Håkon Alseth

current consumption around 200 nA

RE: nRF24LE1 deep sleep high current

Håkon Alseth — Tue, 13 Feb 2018 06:57:41 GMT

On line 26: The PxCON for P14 should be P1CON = (0x10 + 4); to set it to input with no pull-resistor. If you do not have an external pull-resistor, one can be applied by setting bits 6:5 to 01 or 10 (see the datasheet for more info).

It seems that you are setting the output "LED" and the wakeup pin both to the same GPIO, P14. Could you try setting the LED back to P13?

Cheers,

Håkon

RE: nRF24LE1 deep sleep high current

uldara — Tue, 13 Feb 2018 03:20:03 GMT

hi thank for your reply, now current consumption down to 400 - 500 nA

but i can't wake up chip from P14

please check my code

#include <reg24le1.h>
#include "hal_delay.h"

#define LED  P14




void IO_Init(void)
{
    char i;
    // Disconnect unused GPIOs to avoid them floating in sleep
    for (i = 0; i < 8; i++)
    {
        P0CON = 0x70 + i;
        P1CON = 0x70 + i;
        P2CON = 0x70 + i;
        P3CON = 0x70 + i;
    } 
    P0DIR = 0xFF;	
    P1DIR = 0x10;           // P14 input , P13 output
	P2DIR = 0xFF;
    P3DIR = 0xFF;
                    
    P1CON = 0x00 + 3;       // Set P1.2 as output 
	P1CON = 0x70 + 4;       // Set P1.4 as input 

    LED = 0;
    OPMCON = 0x00;
    
} 

void main()
{ 
   IO_Init();
   while(1)
   {
     if(PWRDWN & 0x80) 
       {  
         PWRDWN = 0; 
       }
 	    
 	    WUOPC1 = 0x10;          // Interrupt wake up P1.4
 	    
 	    if(P14 == 1) 
 	      {
 	        LED = 1;
 	        delay_ms(100);
 	        LED = 0;
 	        OPMCON = 0x06;      // wake up pin when LOW
 	      }
 	    else
 	      {
 	        LED = 1;
 	        delay_ms(100);
 	        LED = 0;
 	        OPMCON = 0x02;      // wake up pin when HIGH
 	      }
 	      
 	    PWRDWN = 0x01;          // deep sleep
   
   
   }

}

thank

RE: nRF24LE1 deep sleep high current

Håkon Alseth — Mon, 12 Feb 2018 10:24:25 GMT

Hi,

Could you try disconnecting all inputs in your IO-init, then measure the current consumption?

You could do something like this:

void IO_Init(void)
{
    uint8_t i;
    // Disconnect unused GPIOs to avoid them floating in sleep
    for (i = 0; i < 8; i++)
    {
        P0CON = 0x70 + i;
        P1CON = 0x70 + i;
        P2CON = 0x70 + i;
        P3CON = 0x70 + i;
    }    
    P1DIR = 0x10;
    // Set P1.4 as output again
    P1CON = 0x00 + 4;
    LED = 0;
    OPMCON = 0x00;
}

Cheers,

Håkon