use model-dependent GPIO bits
[sensor-light.git] / msp430 / main.c
index 5d03cca04d33314f26f55b56db6791904824b907..dab85428e6635833fe526b2d73f8059004799f01 100644 (file)
@@ -4,6 +4,21 @@ static volatile unsigned int ADC_Result;
 static volatile unsigned int irq_events = 0;
 enum {ev_btn1 = 0, ev_btn2, ev_pir1, ev_pir2, ev_tmr, ev_adc, ev_MAX};
 
+#ifdef ADCSC /* Let us hope that this is a "new" model */
+# define BIT_RL BIT0
+# define BIT_GL BIT1
+# define PBTN(x) P2##x
+# define BIT_BTN BIT3
+# define HAVE_BTN2
+# define BIT_BTN2 BIT7
+#else
+# define BIT_RL BIT0
+# define BIT_GL BIT6
+# define PBTN(x) P1##x
+# define BIT_BTN BIT3
+# define BIT_BTN2 0
+#endif
+
 int main(void)
 {
        int Duty_Cycle = 1;
@@ -13,42 +28,41 @@ int main(void)
 
        WDTCTL = WDTPW | WDTHOLD;       // stop watchdog timer
        // Configure GPIO Out
-       P1DIR |= BIT0|BIT1|BIT2;     // Set P1.0&1&2/LEDs to output direction
-       P1OUT &= ~(BIT0|BIT1);       // P1.0&1 LEDs off
-       P1SEL1 |= BIT2;              // P1.2 PWM out
+       P1DIR |= BIT_RL|BIT_GL|BIT7;    // Set LEDs & PWM to output direction
+       P1OUT &= ~(BIT_RL|BIT_GL);      // LEDs off
+       P1SEL1 |= BIT7;                 // PWM out
 
        // Configure GPIO In
-       P2DIR &= ~(BIT3|BIT7);       // Buttons
-       P2OUT |= BIT3|BIT7;          // Pull up
-       P2REN |= BIT3|BIT7;          // Enable pull-up
-       P2IES |= BIT3|BIT7;          // INT on Hi->Lo edge
-       P2IE  |= BIT3|BIT7;          // INT enable
-
-       P2DIR &= ~(BIT2|BIT5);       // PIR Sensors
-       P2OUT &= ~(BIT2|BIT5);       // Pull down
-       P2REN |= BIT2|BIT5;          // Enable pull-down
-       P2IES &= ~(BIT2|BIT5);       // INT on Lo->Hi edge
-       P2IE  |= BIT2|BIT5;          // INT enable
-       P2IFG = 0;                   // ??? Needed?
+       PBTN(DIR) &= ~(BIT_BTN|BIT_BTN2);       // Buttons
+       PBTN(OUT) |= BIT_BTN|BIT_BTN2;          // Pull up
+       PBTN(REN) |= BIT_BTN|BIT_BTN2;          // Enable pull-up
+       PBTN(IES) |= BIT_BTN|BIT_BTN2;          // INT on Hi->Lo edge
+       PBTN(IE)  |= BIT_BTN|BIT_BTN2;          // INT enable
+
+       P2DIR &= ~(BIT4|BIT5);          // PIR Sensors
+       P2OUT &= ~(BIT4|BIT5);          // Pull down
+       P2REN |= BIT4|BIT5;             // Enable pull-down
+       P2IES &= ~(BIT4|BIT5);          // INT on Lo->Hi edge
+       P2IE  |= BIT4|BIT5;             // INT enable
 
        // Configure ADC A7 pin
        SYSCFG2 |= ADCPCTL7;
 
        // Configure ADC10
-       ADCCTL0 |= ADCSHT_2 | ADCON;        // ADCON, S&H=16 ADC clks
-       ADCCTL1 |= ADCSHP;                  // ADCCLK = MODOSC; sampling timer
-       ADCCTL2 |= ADCRES;                  // 10-bit conversion results
-       ADCMCTL0 |= ADCINCH_7;              // A7 ADC input select; Vref=AVCC
-       ADCIE |= ADCIE0;                    // Enable ADC conv complete interrupt
+       ADCCTL0 |= ADCSHT_2 | ADCON;    // ADCON, S&H=16 ADC clks
+       ADCCTL1 |= ADCSHP;              // ADCCLK = MODOSC; sampling timer
+       ADCCTL2 |= ADCRES;              // 10-bit conversion results
+       ADCMCTL0 |= ADCINCH_7;          // A7 ADC input select; Vref=AVCC
+       ADCIE |= ADCIE0;                // Enable ADC conv complete interrupt
 
        // Configure timer A0 for PWM
-       TA0CCR0 = 10000-1;                         // PWM Period
-       TA0CCTL2 = OUTMOD_7;                      // CCR2 reset/set
-       TA0CCR2 = 500;                     // CCR2 PWM duty cycle
-       TA0CTL = TASSEL__SMCLK | MC__UP | TACLR;  // SMCLK, up mode, clear TAR
+       TA0CCR0 = 10000-1;              // PWM Period
+       TA0CCTL2 = OUTMOD_7;            // CCR2 reset/set
+       TA0CCR2 = 500;                  // CCR2 PWM duty cycle
+       TA0CTL = TASSEL__SMCLK | MC__UP | TACLR;        // SMCLK, up mode, clear TAR
 
        //Configure timer A1 for counting time
-       TA1CTL |= TASSEL__SMCLK | MC__CONTINUOUS | TACLR | TAIE;     // SMCLK, no divider, continuous mode
+       TA1CTL |= TASSEL__SMCLK | MC__CONTINUOUS | TACLR | TAIE;        // SMCLK, no divider, continuous mode
 
        // Disable the GPIO power-on default high-impedance mode to activate
        // previously configured port settings
@@ -58,10 +72,10 @@ int main(void)
        {
                unsigned int events;
 
-               _disable_interrupt();
+               _disable_interrupts();
                events = irq_events;
                irq_events = 0;
-               _enable_interrupt();
+               _enable_interrupts();
 
                // Button 2 or PIR events initiate light measurement and tuns on green led
                if (events & (1<<ev_btn2|1<<ev_pir1|1<<ev_pir2)) {
@@ -69,13 +83,13 @@ int main(void)
                                Time_Left = 15;
                                continue;
                        }
-                       ADCCTL0 |= ADCENC | ADCSC;                       // Sampling and conversion start
-                       P1OUT |= BIT1;                                   // Set P1.1 LED on
+                       ADCCTL0 |= ADCENC | ADCSC;      // Sampling and conversion start
+                       P1OUT |= BIT1;  // Set P1.1 LED on
                }
 
                // End of light measurement, set new Duty_Cycle and zero increment and tuns off green led
                if (events & 1<<ev_adc) {
-                       P1OUT &= ~BIT1;                                  // Clear P1.1 LED off
+                       P1OUT &= ~BIT1; // Clear P1.1 LED off
                        if (Time_Left)
                                continue;
                        if (ADC_Result < 200)
@@ -124,7 +138,7 @@ int main(void)
                __bis_SR_register(LPM0_bits | GIE);
                __no_operation();
        }
-       retun 0; /* not reached */
+       return 0; /* not reached */
 }
 
 // TIMER interrupt routine
@@ -140,21 +154,21 @@ void __attribute__ ((interrupt(TIMER1_A1_VECTOR))) Timer_A (void)
        switch(__even_in_range(TA1IV,TA1IV_TAIFG))
        {
                case TA1IV_NONE:
-                       break;                               // No interrupt
+                       break;  // No interrupt
                case TA1IV_TACCR1:
-                       break;                               // CCR1 not used
+                       break;  // CCR1 not used
                case TA1IV_TACCR2:
-                       break;                               // CCR2 not used
+                       break;  // CCR2 not used
                case TA1IV_TAIFG:
                        irq_events |= 1<<ev_tmr;
-                       __bic_SR_register_on_exit(LPM0_bits);            // Clear CPUOFF bit from LPM0
+                       __bic_SR_register_on_exit(LPM0_bits);   // Clear CPUOFF bit from LPM0
                        break;
                default:
                        break;
        }
        //if (Time_Count++ > 1000) {
        //    Time_Count = 0;
-       //    __bic_SR_register_on_exit(LPM0_bits);            // Clear CPUOFF bit from LPM0
+       //    __bic_SR_register_on_exit(LPM0_bits);     // Clear CPUOFF bit from LPM0
        //}
 }
 
@@ -185,7 +199,7 @@ void __attribute__ ((interrupt(ADC_VECTOR))) ADC_ISR (void)
                case ADCIV_ADCIFG:
                        ADC_Result = ADCMEM0;
                        irq_events |= 1<<ev_adc;
-                       __bic_SR_register_on_exit(LPM0_bits);            // Clear CPUOFF bit from LPM0
+                       __bic_SR_register_on_exit(LPM0_bits);   // Clear CPUOFF bit from LPM0
                        break;
                default:
                        break;
@@ -204,19 +218,19 @@ void __attribute__ ((interrupt(PORT2_VECTOR))) Port_2 (void)
 {
        if (P2IFG & BIT3) {
                irq_events |= 1<<ev_btn1;
-               P2IFG &= ~BIT3;                      // Clear P1.3 IFG
+               P2IFG &= ~BIT3; // Clear P1.3 IFG
        }
        if (P2IFG & BIT7) {
                irq_events |= 1<<ev_btn2;
-               P2IFG &= ~BIT7;                      // Clear P1.3 IFG
+               P2IFG &= ~BIT7; // Clear P1.3 IFG
        }
        if (P2IFG & BIT2) {
                irq_events |= 1<<ev_pir1;
-               P2IFG &= ~BIT2;                      // Clear P1.4 IFG
+               P2IFG &= ~BIT2; // Clear P1.4 IFG
        }
        if (P2IFG & BIT5) {
                irq_events |= 1<<ev_pir2;
-               P2IFG &= ~BIT5;                      // Clear P1.7 IFG
+               P2IFG &= ~BIT5; // Clear P1.7 IFG
        }
-       __bic_SR_register_on_exit(LPM3_bits);   // Exit LPM3
+       __bic_SR_register_on_exit(LPM3_bits);   // Exit LPM3
 }