82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
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/*------------------------------------------------------------------------------
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* File: p1.c
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* Function: Prints out variables according to their Data Type with the size and the ranges of the variables
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* Description:
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* Input: None
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* Output: "
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* Author(s): Noah Woodlee
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* Lab Section: 09
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* Date: Nov 1, 2021
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*----------------------------------------------------------------------------*/
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#include <msp430.h>
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#define SW1_PRESSED ((BIT0&P1IFG)==0) // SW1 Status
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#define SW2_PRESSED ((BIT1&P1IFG)==0) // SW2 Status
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int Up =1;
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int main(void)
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{
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WDTCTL = WDT_MDLY_8; // 8 ms interval
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_EINT(); // Enable interrupts
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IE1 |= WDTIE; // Enable WDT interrupt
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P2DIR |= (BIT1 + BIT2); // P2.1 and P2.2 set up as output
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P2SEL &= ~BIT1; // Clear P2.1
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P2OUT |= BIT1; // Turn on LED2
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P2OUT &= ~BIT2; // Turn Off LED1
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P2SEL |= BIT2; // P2.2 special function (TB0 output)
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TB0CTL = TBSSEL_2 | MC_1; // Upmode
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TB0CCTL1 |= (OUTMOD_2 + CCIE); // TB1 output is in Up mode and Interrupt
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TB0CCTL0 = CCIE; // TB0 count triggers interrupt
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TB0CCR0 = 750; // Set TB0 (and maximum) count value
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TB0CCR1 = Up; // Set TB1 count value
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P1IE |= BIT0; // P1.0 interrupt enabled
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P1IE |= BIT1; // P1.1 interrupt enabled
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P1IES |= BIT0; // P1.0 hi/low edge
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P1IFG &= ~BIT0; // P1.0 IFG cleared
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P1IES |= BIT1; // P1.1 hi/low edge
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P1IFG &= ~BIT1; // P1.1 IFG cleared
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_BIS_SR(LPM0_bits + GIE); // Enter Low Power Mode 3
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}
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#pragma vector = TIMERB0_VECTOR
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__interrupt void timerISR(void)
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{
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P2OUT |= BIT1; // Turn off LED2
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TB0CCTL0 &= ~CCIFG; // Clear interrupt flag
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}
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#pragma vector = TIMERB1_VECTOR
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__interrupt void timerISR2(void)
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{
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P2OUT &= ~BIT1; // Toggle LED2
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TB0CCTL1 &= ~CCIFG; // Clear interrupt flag
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}
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// Watchdog Timer interrupt service routine
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#pragma vector=WDT_VECTOR
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__interrupt void watchdog_timer(void)
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{
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TB0CCR1 += Up; // Up=1, CCR1 will increase; Up = -1 CCR1 will decrease
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if(TB0CCR1 == 750){ // If CCR1 is upper-bound, Up becomes -1
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Up = -1;
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}
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if(TB0CCR1 ==0 ){ // If CCR1 is upper-bound, Up becomes 1
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Up = 1;
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}
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}
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// Port 1 interrupt service routine
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#pragma vector = PORT1_VECTOR
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__interrupt void Port1_ISR (void) {
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if(!SW1_PRESSED)
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WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer
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}
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else if(!SW2_PRESSED) WDTCTL = WDT_MDLY_8; // 8 ms interval
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P1IES |= BIT0; // P1.0 hi/low edge
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P1IFG &= ~BIT0; // P1.0 IFG cleared
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P1IES |= BIT1; // P1.1 hi/low edge
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P1IFG &= ~BIT1; // P1.1 IFG cleared
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}
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