//
//
// +-----(0.9766us)---------\------------------>+
// TA0_ISR TA1 ADC10_ISR TA0_ISR TA1
// -----+------------+------------+-----------\------+------------+----->
// Enable ADC Trigger ADC Disable ADC
// and Vref Compare
// +-( >30us--->+
//
//
// MSP430G2x33/G2x53
// -----------------
// /|| XIN|-
// | | | 32kHz
// --|RST XOUT|-
// | |
// >---|P1.7/A7 P1.0 |--> LED
//
// D. Dang
// Texas Instruments Inc.
// December 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include "msp430g2553.h"
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
ADC10CTL1 = INCH_7 + SHS_1; // P1.7, TA1 trigger sample start
ADC10AE0 = 0x80; // P1.7 ADC10 option select
P1DIR |= 0x01; // Set P1.0 to output direction
TACCTL0 = CCIE; // Enable interrupt
TACCR0 = 32-1; // PWM Period
TACCTL1 = OUTMOD_3; // TACCR1 set/reset
TACCR1 = 2; // TACCR1 PWM Duty Cycle
TACTL = TASSEL_1 + MC_1; // ACLK, up mode
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3, enable interrupts
}
// ADC10 interrupt service routine
#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR(void)
{
ADC10CTL0 &= ~ENC; // ADC10 disabled
ADC10CTL0 = 0; // ADC10, Vref disabled completely
if (ADC10MEM < 0x88) // ADC10MEM = A7 > 0.2V?
P1OUT &= ~0x01; // Clear P1.0 LED off
else
P1OUT |= 0x01; // Set P1.0 LED on
}
// Timer A0 interrupt service routine
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A(void)
{
ADC10CTL0 = SREF_1 + ADC10SHT_2 + REFON + ADC10ON + ADC10IE;
ADC10CTL0 |= ENC; // ADC10 enable set
}
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