Greetings
I would like to know how to switch between a simple ADC conversion from 1 analog input and a sequence of conversión from 2 analog inputs, for 2 current sensors with MSP430F5529.
I need to have the reading of only one sensor each second, and the reading of both sensors each 5 minutes. Currently I'm making the reading of both sensors each second, but the idea is save resources through ignoring one reading until the next 5 minutes. There's my ADC code:
#include <msp430.h>
#include "ADC.h"
/*
* LOCAL VARIABLES
*/
volatile unsigned int current1;
volatile unsigned int current2;
/*
* FUNCTIONS
*/
void
initADC(void)
{
P6SEL = 0x0F; // Enable A/D channel inputs
ADC12CTL0 = ADC12ON+ADC12MSC+ADC12SHT0_2; // Turn on ADC12, set sampling time
ADC12CTL1 = ADC12SHP+ADC12CONSEQ_1; // Use sampling timer, single sequence
ADC12MCTL0 = ADC12INCH_0; // ref+=AVcc, channel = A0
ADC12MCTL1 = ADC12INCH_1+ADC12EOS; // ref+=AVcc, channel = A1, end seq.
ADC12IE = ADC12IFG1; // Enable ADC12IFG.1
ADC12CTL0 |= ADC12ENC; // Enable conversions
__bis_SR_register(GIE); // Enable interrupts
return;
}
void getADC(int * currents){
ADC12CTL0 |= ADC12SC;
currents[0]=current1;
currents[1]=current2;
ADC12CTL0 &= ~ADC12SC;
return;
}
/*
* INTERRUPTIONS
*/
#pragma vector=ADC12_VECTOR
__interrupt void ADC12ISR(void)
{
switch(__even_in_range(ADC12IV,34))
{
case 0: break; // Vector 0: No interrupt
case 2: break; // Vector 2: ADC overflow
case 4: break; // Vector 4: ADC timing overflow
case 6: break; // Vector 6: ADC12IFG0
case 8: // Vector 8: ADC12IFG1
current1 = ADC12MEM0; // Move results, IFG is cleared
current2 = ADC12MEM1; // Move results, IFG is cleared
__bic_SR_register_on_exit(LPM4_bits); // Exit active CPU, SET BREAKPOINT HERE
break;
case 10: break; // Vector 10: ADC12IFG2
case 12: break; // Vector 12: ADC12IFG3
case 14: break; // Vector 14: ADC12IFG4
case 16: break; // Vector 16: ADC12IFG5
case 18: break; // Vector 18: ADC12IFG6
case 20: break; // Vector 20: ADC12IFG7
case 22: break; // Vector 22: ADC12IFG8
case 24: break; // Vector 24: ADC12IFG9
case 26: break; // Vector 26: ADC12IFG10
case 28: break; // Vector 28: ADC12IFG11
case 30: break; // Vector 30: ADC12IFG12
case 32: break; // Vector 32: ADC12IFG13
case 34: break; // Vector 34: ADC12IFG14
default: break;
}
}
Thank you for your attention, every suggestion is welcome. Have a nice day.
