parametrize button interrupts per model
[sensor-light.git] / msp430 / main.c
index 09b34f84d319d716f6c295a9b1f5af557adaa3f7..38f681c340a9c117b789fa140d3bfff63c8555e5 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;
@@ -13,32 +28,37 @@ int main(void)
 
        WDTCTL = WDTPW | WDTHOLD;       // stop watchdog timer
        // Configure GPIO Out
-       P1DIR |= BIT0|BIT1|BIT2;        // Set LEDs & PWM 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
-
-       // Configure ADC A7 pin
-       SYSCFG2 |= ADCPCTL7;
+       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 ADC10
+
+#ifdef ADCPCTL4 /* Newer model */
+       SYSCFG2 |= ADCPCTL4|ADCPCTL5;   // disconnect pin 4 and 5 from GPIO
        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
+       ADCMCTL0 |= ADCINCH_4;          // A4 ADC input select; Vref=AVCC
        ADCIE |= ADCIE0;                // Enable ADC conv complete interrupt
+       // channel 5 is unused, reserved for measuring current
+#else
+# error older mode ADC unimplemented
+       // channel 5 is unused, reserved for measuring current
+#endif
 
        // Configure timer A0 for PWM
        TA0CCR0 = 10000-1;              // PWM Period
@@ -69,12 +89,14 @@ int main(void)
                                continue;
                        }
                        ADCCTL0 |= ADCENC | ADCSC;      // Sampling and conversion start
-                       P1OUT |= BIT1;  // Set P1.1 LED on
+                       // ADC10CTL0 |= ENC + ADC10SC;  // Sampling and conversion start
+                       P1OUT |= BIT_GL;        // Set green LED on
                }
 
-               // End of light measurement, set new Duty_Cycle and zero increment and tuns off green led
+               // End of light measurement,
+               // set new Duty_Cycle and zero increment and turn off green led
                if (events & 1<<ev_adc) {
-                       P1OUT &= ~BIT1; // Clear P1.1 LED off
+                       P1OUT &= ~BIT_GL;       // Clear green LED off
                        if (Time_Left)
                                continue;
                        if (ADC_Result < 200)
@@ -98,7 +120,7 @@ int main(void)
                if (events & 1<<ev_tmr) {
                        if (Time_Count++ > 10) {
                                Time_Count = 0;
-                               P1OUT ^= BIT0;
+                               P1OUT ^= BIT_RL; // blink
                                if (Time_Left)
                                        Time_Left--;
                                else if (Duty_Cycle > 1)
@@ -146,15 +168,11 @@ void __attribute__ ((interrupt(TIMER1_A1_VECTOR))) Timer_A (void)
                        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);   // Wake up
                        break;
                default:
                        break;
        }
-       //if (Time_Count++ > 1000) {
-       //    Time_Count = 0;
-       //    __bic_SR_register_on_exit(LPM0_bits);     // Clear CPUOFF bit from LPM0
-       //}
 }
 
 // ADC interrupt service routine
@@ -184,7 +202,7 @@ 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);   // Wake up
                        break;
                default:
                        break;
@@ -201,21 +219,23 @@ void __attribute__ ((interrupt(PORT2_VECTOR))) Port_2 (void)
 #error Compiler not supported!
 #endif
 {
-       if (P2IFG & BIT3) {
+       if (PBTN(IFG) & BIT_BTN) {
                irq_events |= 1<<ev_btn1;
-               P2IFG &= ~BIT3; // Clear P1.3 IFG
+               PBTN(IFG) &= ~BIT_BTN;  // Clear button IFG
        }
-       if (P2IFG & BIT7) {
+#ifdef HAVE_BTN2
+       if (PBTN(IFG) & BIT_BTN2) {
                irq_events |= 1<<ev_btn2;
-               P2IFG &= ~BIT7; // Clear P1.3 IFG
+               PBTN(IFG) &= ~BIT_BTN2; // Clear button 2 IFG
        }
-       if (P2IFG & BIT2) {
+#endif
+       if (P2IFG & BIT4) {
                irq_events |= 1<<ev_pir1;
-               P2IFG &= ~BIT2; // Clear P1.4 IFG
+               P2IFG &= ~BIT4; // Clear P2.4 IFG
        }
        if (P2IFG & BIT5) {
                irq_events |= 1<<ev_pir2;
-               P2IFG &= ~BIT5; // Clear P1.7 IFG
+               P2IFG &= ~BIT5; // Clear P2.5 IFG
        }
-       __bic_SR_register_on_exit(LPM3_bits);   // Exit LPM3
+       __bic_SR_register_on_exit(LPM0_bits);   // Wake up
 }