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
50 #ifdef ADCPCTL4 /* Newer model */
51 SYSCFG2 |= ADCPCTL4|ADCPCTL5; // disconnect pin 4 and 5 from GPIO
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_4; // A4 ADC input select; Vref=AVCC
56 ADCIE |= ADCIE0; // Enable ADC conv complete interrupt
57 // channel 5 is unused, reserved for measuring current
59 # error older mode ADC unimplemented
60 // channel 5 is unused, reserved for measuring current
63 // Configure timer A0 for PWM
64 TA0CCR0 = 10000-1; // PWM Period
65 TA0CCTL2 = OUTMOD_7; // CCR2 reset/set
66 TA0CCR2 = 500; // CCR2 PWM duty cycle
67 TA0CTL = TASSEL__SMCLK | MC__UP | TACLR; // SMCLK, up mode, clear TAR
69 //Configure timer A1 for counting time
70 TA1CTL |= TASSEL__SMCLK | MC__CONTINUOUS | TACLR | TAIE; // SMCLK, no divider, continuous mode
72 // Disable the GPIO power-on default high-impedance mode to activate
73 // previously configured port settings
80 _disable_interrupts();
85 // Button 2 or PIR events initiate light measurement and tuns on green led
86 if (events & (1<<ev_btn2|1<<ev_pir1|1<<ev_pir2)) {
91 ADCCTL0 |= ADCENC | ADCSC; // Sampling and conversion start
92 // ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
93 P1OUT |= BIT_GL; // Set green LED on
96 // End of light measurement,
97 // set new Duty_Cycle and zero increment and turn off green led
98 if (events & 1<<ev_adc) {
99 P1OUT &= ~BIT_GL; // Clear green LED off
102 if (ADC_Result < 200)
108 // Button 1 sets non-zero increment (and toggles it)
109 if (events & 1<<ev_btn1) {
110 if (Duty_Cycle > 5000) {
119 // Timer event (100 ms) changed duty cycle and flashes red led
120 if (events & 1<<ev_tmr) {
121 if (Time_Count++ > 10) {
123 P1OUT ^= BIT_RL; // blink
126 else if (Duty_Cycle > 1)
131 else if (Increment > 0)
133 else if (Increment < 0)
135 if (Duty_Cycle < 1) {
139 if (Duty_Cycle > (10000-1)) {
140 Duty_Cycle = 10000-1;
143 TA0CCR2 = Duty_Cycle;
145 __bis_SR_register(LPM0_bits | GIE);
148 return 0; /* not reached */
151 // TIMER interrupt routine
152 #if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
153 #pragma vector = TIMER1_A1_VECTOR
154 __interrupt void Timer_A (void)
155 #elif defined(__GNUC__)
156 void __attribute__ ((interrupt(TIMER1_A1_VECTOR))) Timer_A (void)
158 #error Compiler not supported!
161 switch(__even_in_range(TA1IV,TA1IV_TAIFG))
164 break; // No interrupt
166 break; // CCR1 not used
168 break; // CCR2 not used
170 irq_events |= 1<<ev_tmr;
171 __bic_SR_register_on_exit(LPM0_bits); // Wake up
178 // ADC interrupt service routine
179 #if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
180 #pragma vector=ADC_VECTOR
181 __interrupt void ADC_ISR(void)
182 #elif defined(__GNUC__)
183 void __attribute__ ((interrupt(ADC_VECTOR))) ADC_ISR (void)
185 #error Compiler not supported!
188 switch(__even_in_range(ADCIV,ADCIV_ADCIFG))
194 case ADCIV_ADCTOVIFG:
203 ADC_Result = ADCMEM0;
204 irq_events |= 1<<ev_adc;
205 __bic_SR_register_on_exit(LPM0_bits); // Wake up
212 // GPIO interrupt service routine
213 #if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
214 #pragma vector=PORT2_VECTOR
215 __interrupt void Port_2(void)
216 #elif defined(__GNUC__)
217 void __attribute__ ((interrupt(PORT2_VECTOR))) Port_2 (void)
219 #error Compiler not supported!
222 if (PBTN(IFG) & BIT_BTN) {
223 irq_events |= 1<<ev_btn1;
224 PBTN(IFG) &= ~BIT_BTN; // Clear button IFG
227 if (PBTN(IFG) & BIT_BTN2) {
228 irq_events |= 1<<ev_btn2;
229 PBTN(IFG) &= ~BIT_BTN2; // Clear button 2 IFG
233 irq_events |= 1<<ev_pir1;
234 P2IFG &= ~BIT4; // Clear P2.4 IFG
237 irq_events |= 1<<ev_pir2;
238 P2IFG &= ~BIT5; // Clear P2.5 IFG
240 __bic_SR_register_on_exit(LPM0_bits); // Wake up