/*The author assumes no liability for any damage caused by this program. 
It does not matter if you jumped from the balcony with anemometer in yours hands, 
or are lost in the ocean waves, or something else. 
The program is made up of examples, which are supplied by TI. 
Have fun and use. 
Additional information & circuit diagram - http://skootsone.yolasite.com/wind-anem-msp430.php
Thank you for your cooperation... (Fifth Element:)  */

#include <msp430.h>
volatile unsigned int time_counter_WDT_cycles=0;
volatile unsigned int pulses_from_sensor;
volatile unsigned int wind_speed_m_s;
volatile unsigned int m,n,ldt,low_data,high_data;

int main(void)
{ P1DIR = 0x7F;                        // All P1.x outputs
  P1OUT = 0;                           // All P1.x reset
    P1IE |= 0x80;                      // P1.7 interrupt enabled
    P1IES |= 0x80;                     // P1.7 Hi/lo edge
    P1IFG &= ~0x80;                    // P1.7 IFG cleared
	BCSCTL3 |= 0x20;;              //ACLK from int.12kHz VLO clock
	WDTCTL = WDT_ADLY_1_9;         // WDT 1.9mS*32/12=6.07mS, ACLK, interval timer
	IE1 |= WDTIE;                  // Enable WDT interrupt
  __bis_SR_register(LPM3_bits + GIE);  // Enter LPM3 w/interrupt
}

#pragma vector=WDT_VECTOR
__interrupt void watchdog_timer(void)
{    if (time_counter_WDT_cycles==164)
    {
        time_counter_WDT_cycles=0;
        wind_speed_m_s = (pulses_from_sensor * 2) / 5; 
		pulses_from_sensor = 0; ldt=0x00;
        ldt = 0xFF << wind_speed_m_s; ldt = ldt >> 8;
        low_data = (ldt &  0xF) + 0x20;
        high_data = (ldt >> 4) + 0x10;
    }
    else time_counter_WDT_cycles++;
            n++;
            P1OUT &= 0xC0;
            if(n & 0x01)
            {P1OUT |= low_data;}
            else
            {P1OUT |= high_data;}
}

#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{     P1IFG &= ~0x80;                // P1.7 IFG cleared
P1OUT ^= 0x40;                       // P1.6 = toggle
pulses_from_sensor++;
}