about CC2530's rising interrupt

Fanhua Meng

hello:

when I use the program below:

P0 = 0xfe;
P0SEL = 0x00;
P0DIR = 0xfe; //P0.0 and P0.5 interrupt
P0INP = 0x01;
P2INP = 0x00;
cv = P0;
PICTL = 0x00;
P0IFG = 0x00;
P0IEN = 0x01;
IEN1 = 0x20;

aes_seed = 0x00000010;
rtc_s = 0;
add_st(65535);
IEN0 = 0x20; //enable the ST interrupt

EA = 1;

while(1);

HAL_ISR_FUNCTION(port0_ISR,P0INT_VECTOR)

{
unsigned char tt0,tt1,tt2,tt3;
unsigned int i33;
unsigned long i3;
// PCON = 0x00;
// SLEEPCMD = 0x84;
// CLKCONCMD = 0x00; //enable the 32MHz
if (P0IFG & 0x21)
{
EA = 0;

}

when there is a rising edge on the P0.0, I can't get an interrupt.

but if I change the PICTL from 0x00 to 0x01, I will get interrupt.

Please tell me how to get a rising edge interrupt?

Thanks a lot.

Fanhua Meng

over 11 years ago

0 Igor Sherer over 11 years ago

Guru 31280 points

Hi,

Here's an example of getting a rising edge interrupt on P0.1.

NOTE: This configuration assumes that external pull-down resistor is connected to P0.1

  P0SEL &= ~0x02;	/* Set as GPIO */
  P0DIR &= ~0x02;	/* Set as Input */
  P0INP |= 0x02;	        /* Set as tri-state */	
  P0IFG = 0;
  P0IF = 0;
  PICTL &= ~0x01;	/* Set P0 to Rising Edge Interrupt */
  IEN1 |= 0x20;		/* Enable P0 interrupts */

0 Fanhua Meng over 11 years ago in reply to Igor Sherer

Prodigy 30 points

Thanks!

But I use the P0.0 in my circuit board.

If I connected the P0.0 and P0.5,I got the interrupt, and got the

P0IFG = 0x20;

So should I can say the P0.0 can't be used as an interrupt?

Thks.

0 YiKai Chen over 11 years ago in reply to Fanhua Meng

Guru 735685 points

P0.0 can be used as interrupt source. You need to modify the registers like the followings:

P0SEL &= ~0x01; /* Set as GPIO */
P0DIR &= ~0x01;   /* Set as Input */
P0INP |= 0x01;            /* Set as tri-state */
P0IFG = 0;
P0IF = 0;
PICTL &= ~0x01;   /* Set P0 to Rising Edge Interrupt */
IEN1 |= 0x20;     /* Enable P0 interrupts */

0 Fanhua Meng over 11 years ago in reply to YiKai Chen

Prodigy 30 points

I had tested the P0.5 and P2.0, These 2 pins can get the rising interrupt, only the P0.0 can't get the rising interrupt.

Please test the interrupt on a circuit board.

Thanks a lot.

0 Igor Sherer over 11 years ago in reply to Fanhua Meng

Guru 31280 points

I've already tested it several time.

May be you have configured something else, or the some other module, such as ADC, or temperature reading,

messing up with your configurations.

0 YiKai Chen over 11 years ago in reply to Igor Sherer

Guru 735685 points

I pretty sure it works on my board too.

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