Using Interrupt pin of nRf 24L01 module

Projects Programming
1

I want to use interrupt pin of nrf 24l01 rf module for receive interrupt . how can I do this ? I diin't find any article which is directly written about using interrupt pin of nrf 24l01 .

2

Connect it to an interrupt pin and write an ISR that sets a flag?

Typically you still have to poll in loop() anyway so there's no great
advantage over simply polling the chip status unless you are driving
the entire interface by interrupts.

James Coliz's code has some comments about using interrupts (RF24: Driver for nRF24L01(+) 2.4GHz Wireless Transceiver)

3

It might help you to know what the signal is. If it's not on the data sheet you can put a meter on it to see what it is when it receives.

4

Yes, it is described in the datasheets.... I've actually read them (not recently though).

5

So are you familiar with this:?

Incidently, I don't bother with RISING or FALLING. I always use CHANGE and that works with everything.

6

Thanks all for reply . I could use interrupts of arduino , but my confusion is how can I declare interrupt of nrf 24l01 so that it will trigger only when data is available to read . Please help me in this regard.

7

8.5 Interrupt
The nRF24L01+ has an active low interrupt (IRQ) pin. The IRQ pin is activated when TX_DS IRQ, RX_DR
IRQ or MAX_RT IRQ are set high by the state machine in the STATUS register. The IRQ pin resets when
MCU writes '1' to the IRQ source bit in the STATUS register. The IRQ mask in the CONFIG register is used
to select the IRQ sources that are allowed to assert the IRQ pin. By setting one of the MASK bits high, the
corresponding IRQ source is disabled. By default all IRQ sources are enabled.
Note: The 3 bit pipe information in the STATUS register is updated during the IRQ pin high to low
transition. The pipe information is unreliable if the STATUS register is read during an IRQ pin
high to low transition.

nRF24L01datasheet.pdf (462 KB)

nrf24l01_tutorial_0.pdf (511 KB)

8

I found that MASK_TX_DS and MASK_MAX_RT these two bits must be declared as 1 and MASK_RX_DR this bit as 0 to enable receive only interrupt . Is it right ? and then how can I configure this bit ?