3 static volatile unsigned int ADC_Result;
4 static volatile unsigned int irq_events = 0;
5 enum {ev_btn1 = 0, ev_btn2, ev_pir1, ev_pir2, ev_tmr, ev_adc, ev_MAX};
7 #ifdef ADCSC /* Let us hope that this is a "new" model */
10 # define PBTN(x) P2##x
13 # define BIT_BTN2 BIT7
17 # define PBTN(x) P1##x
26 unsigned int Time_Count = 0;
27 unsigned int Time_Left = 5;
29 WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer
31 P1DIR |= BIT_RL|BIT_GL|BIT7; // Set LEDs & PWM to output direction
32 P1OUT &= ~(BIT_RL|BIT_GL); // LEDs off
33 P1SEL1 |= BIT7; // PWM out
36 PBTN(DIR) &= ~(BIT_BTN|BIT_BTN2); // Buttons
37 PBTN(OUT) |= BIT_BTN|BIT_BTN2; // Pull up
38 PBTN(REN) |= BIT_BTN|BIT_BTN2; // Enable pull-up
39 PBTN(IES) |= BIT_BTN|BIT_BTN2; // INT on Hi->Lo edge
40 PBTN(IE) |= BIT_BTN|BIT_BTN2; // INT enable
42 P2DIR &= ~(BIT4|BIT5); // PIR Sensors
43 P2OUT &= ~(BIT4|BIT5); // Pull down
44 P2REN |= BIT4|BIT5; // Enable pull-down
45 P2IES &= ~(BIT4|BIT5); // INT on Lo->Hi edge
46 P2IE |= BIT4|BIT5; // INT enable
48 // Configure ADC A7 pin
52 ADCCTL0 |= ADCSHT_2 | ADCON; // ADCON, S&H=16 ADC clks
53 ADCCTL1 |= ADCSHP; // ADCCLK = MODOSC; sampling timer
54 ADCCTL2 |= ADCRES; // 10-bit conversion results
55 ADCMCTL0 |= ADCINCH_7; // A7 ADC input select; Vref=AVCC
56 ADCIE |= ADCIE0; // Enable ADC conv complete interrupt
58 // Configure timer A0 for PWM
59 TA0CCR0 = 10000-1; // PWM Period
60 TA0CCTL2 = OUTMOD_7; // CCR2 reset/set
61 TA0CCR2 = 500; // CCR2 PWM duty cycle
62 TA0CTL = TASSEL__SMCLK | MC__UP | TACLR; // SMCLK, up mode, clear TAR
64 //Configure timer A1 for counting time
65 TA1CTL |= TASSEL__SMCLK | MC__CONTINUOUS | TACLR | TAIE; // SMCLK, no divider, continuous mode
67 // Disable the GPIO power-on default high-impedance mode to activate
68 // previously configured port settings
75 _disable_interrupts();
80 // Button 2 or PIR events initiate light measurement and tuns on green led
81 if (events & (1<<ev_btn2|1<<ev_pir1|1<<ev_pir2)) {
86 ADCCTL0 |= ADCENC | ADCSC; // Sampling and conversion start
87 P1OUT |= BIT1; // Set P1.1 LED on
90 // End of light measurement, set new Duty_Cycle and zero increment and tuns off green led
91 if (events & 1<<ev_adc) {
92 P1OUT &= ~BIT1; // Clear P1.1 LED off
101 // Button 1 sets non-zero increment (and toggles it)
102 if (events & 1<<ev_btn1) {
103 if (Duty_Cycle > 5000) {
112 // Timer event (100 ms) changed duty cycle and flashes red led
113 if (events & 1<<ev_tmr) {
114 if (Time_Count++ > 10) {
119 else if (Duty_Cycle > 1)
124 else if (Increment > 0)
126 else if (Increment < 0)
128 if (Duty_Cycle < 1) {
132 if (Duty_Cycle > (10000-1)) {
133 Duty_Cycle = 10000-1;
136 TA0CCR2 = Duty_Cycle;
138 __bis_SR_register(LPM0_bits | GIE);
141 return 0; /* not reached */
144 // TIMER interrupt routine
145 #if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
146 #pragma vector = TIMER1_A1_VECTOR
147 __interrupt void Timer_A (void)
148 #elif defined(__GNUC__)
149 void __attribute__ ((interrupt(TIMER1_A1_VECTOR))) Timer_A (void)
151 #error Compiler not supported!
154 switch(__even_in_range(TA1IV,TA1IV_TAIFG))
157 break; // No interrupt
159 break; // CCR1 not used
161 break; // CCR2 not used
163 irq_events |= 1<<ev_tmr;
164 __bic_SR_register_on_exit(LPM0_bits); // Clear CPUOFF bit from LPM0
169 //if (Time_Count++ > 1000) {
171 // __bic_SR_register_on_exit(LPM0_bits); // Clear CPUOFF bit from LPM0
175 // ADC interrupt service routine
176 #if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
177 #pragma vector=ADC_VECTOR
178 __interrupt void ADC_ISR(void)
179 #elif defined(__GNUC__)
180 void __attribute__ ((interrupt(ADC_VECTOR))) ADC_ISR (void)
182 #error Compiler not supported!
185 switch(__even_in_range(ADCIV,ADCIV_ADCIFG))
191 case ADCIV_ADCTOVIFG:
200 ADC_Result = ADCMEM0;
201 irq_events |= 1<<ev_adc;
202 __bic_SR_register_on_exit(LPM0_bits); // Clear CPUOFF bit from LPM0
209 // GPIO interrupt service routine
210 #if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
211 #pragma vector=PORT2_VECTOR
212 __interrupt void Port_2(void)
213 #elif defined(__GNUC__)
214 void __attribute__ ((interrupt(PORT2_VECTOR))) Port_2 (void)
216 #error Compiler not supported!
220 irq_events |= 1<<ev_btn1;
221 P2IFG &= ~BIT3; // Clear P1.3 IFG
224 irq_events |= 1<<ev_btn2;
225 P2IFG &= ~BIT7; // Clear P1.3 IFG
228 irq_events |= 1<<ev_pir1;
229 P2IFG &= ~BIT2; // Clear P1.4 IFG
232 irq_events |= 1<<ev_pir2;
233 P2IFG &= ~BIT5; // Clear P1.7 IFG
235 __bic_SR_register_on_exit(LPM3_bits); // Exit LPM3