prerak
Newbie level 4
Dear Experts,
I am trying to execute LPC2138 ADC in burst mode with interrupt, and here is my code:
The code causes the interrupt to fire once, and then never again.
The DONE and the OVERRUN bits are asserted since the interrupt is not called and AD0DR is no longer read.
What am I missing here?
Your help is greatly appreciated!
Thanks,
Prerak
I am trying to execute LPC2138 ADC in burst mode with interrupt, and here is my code:
Code:
int data0, data1;
__irq void intAdc(void){
int ad = AD0DR;
int channel = (ad >> 24) & 0x7;
// AD0CR &= ~(0x1 << 16);
// AD0CR &= ~(0x1 << 21);
if(channel == 0){
data0 = (ad >> 6) & 0x3ff;
} else if(channel == 1){
data1 = (ad >> 6) & 0x3ff;
}
//AD0CR |= 0X1 << 24;
//AD0CR = AD0CR;
// AD0CR |= 0x1 << 16; // Burst
// AD0CR |= 0X1 << 21; // operational
AD0DR &= ~(0x1 << 31);
VICVectAddr0 = 0x0;
}
void initAdc(void){
// enable ad0.0 and ad0.1 in burst mode
// the values should be read by the above interrupt
// AD0CR = 0x0;
// AD0CR |= 0x3; // 0 and 1
// AD0CR |= 13 << 8; // @4 MHz
// AD0CR |= 0x1 << 16; // Burst
// AD0CR |= 0x0 << 17; // clks = 0
// AD0CR |= 0X0 << 20; // reserved
// AD0CR |= 0X1 << 21; // operational
// AD0CR |= 0X0 << 22;
// AD0CR |= 0X1 << 24;
// AD0CR |= 0X0 << 27;
AD0CR = 0x00211D03;
VICVectAddr2 = (unsigned int) intAdc;
VICVectCntl2 = 0x20 | 18;
VICIntEnable |= 0x1 << 18;
// PCONP |= 0x00001000;
// AD0INTEN = 0xff;
//ADGSR |= 0x1 << 16;
}
The code causes the interrupt to fire once, and then never again.
The DONE and the OVERRUN bits are asserted since the interrupt is not called and AD0DR is no longer read.
What am I missing here?
Your help is greatly appreciated!
Thanks,
Prerak