static volatile unsigned int irq_events = 0;
enum {ev_btn1 = 0, ev_btn2, ev_pir1, ev_pir2, ev_tmr, ev_adc, ev_MAX};
+#define PWM_ORDER 10
+#define PWM_HALF 5
+#define LIGHT_THRESHOLD 900
+#define TIME_ON 320
+
+#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
+
+static int expon2(int duty)
+{
+ int shift = duty>>1;
+ int comp = 1<<shift;
+ int extra = (duty & 1) ? comp>>1 : 0;
+ return (duty ? comp|extra : 0);
+}
+
int main(void)
{
- int Duty_Cycle = 1;
+ int Duty_Cycle = 0;
int Increment = 1;
- unsigned int Time_Count = 0;
- unsigned int Time_Left = 5;
+ unsigned int Time_Left = 50;
+ unsigned int Time_Indicate = 2;
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|BIT2; // Set LEDs & PWM to output direction
+ P1OUT &= ~(BIT_RL|BIT_GL); // LEDs off
+#ifdef P1SEL1
+ P1SEL1 |= BIT2; // PWM out
+#else
+ P1SEL |= BIT2; // PWM out
+#endif
// 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
+ 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
- // Configure ADC A7 pin
- SYSCFG2 |= ADCPCTL7;
+ 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
+ ADC10CTL0 = ADC10SHT_2 + ADC10ON + ADC10IE; // ADCON, S&H=16 ADC clks
+ ADC10CTL1 = INCH_4; // A4 ADC input select
+ // channel 5 is unused, reserved for measuring current
+#endif
+
+ // Timer and PWM
+
+#ifndef TASSEL__SMCLK
+# define TASSEL__SMCLK TASSEL_2
+# define MC__UP MC_1
+# define MC__CONTINUOUS MC_2
+# define TA0CCR2 TA0CCR1
+# define TA0CCTL2 TA0CCTL1
+#endif
// 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 = 1 << PWM_ORDER; // PWM Period 2^10 ca. 1 kHz
+ TA0CCR2 = 0; // CCR1 PWM duty cycle
+ TA0CCTL2 = OUTMOD_7; // CCR1 reset/set
+ TA0CTL = TASSEL__SMCLK | MC__UP | TACLR;// SMCLK, up mode
+ // SMCLK, no divider, up mode, no interrupt, 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, interrupt enable
+#ifdef LOCKLPM5
// Disable the GPIO power-on default high-impedance mode to activate
// previously configured port settings
PM5CTL0 &= ~LOCKLPM5;
+#endif
while(1)
{
irq_events = 0;
_enable_interrupts();
- // Button 2 or PIR events initiate light measurement and tuns on green led
+ // Button 2 or PIR events initiate light measurement
+ // and tuns on green or red led
if (events & (1<<ev_btn2|1<<ev_pir1|1<<ev_pir2)) {
- if (Duty_Cycle > 1) {
- Time_Left = 15;
- continue;
- }
- ADCCTL0 |= ADCENC | ADCSC; // Sampling and conversion start
- P1OUT |= BIT1; // Set P1.1 LED on
+ if (events & 1<<ev_pir1)
+ P1OUT |= BIT_GL; // Set green LED on
+ if (events & 1<<ev_pir2)
+ P1OUT |= BIT_RL; // Set red LED on
+ // Sampling and conversion start
+#ifdef ADCENC
+ ADCCTL0 |= ADCENC | ADCSC;
+#else
+ ADC10CTL0 |= ENC + ADC10SC;
+#endif
}
- // End of light measurement, set new Duty_Cycle and zero increment and tuns off green led
+ // End of light measurement. Set new Duty_Cycle,
+ // zero increment and turn off green led
if (events & 1<<ev_adc) {
- P1OUT &= ~BIT1; // Clear P1.1 LED off
- if (Time_Left)
- continue;
- if (ADC_Result < 200)
+ P1OUT ^= (BIT_GL|BIT_RL); // Flip green and red LEDs
+ Time_Indicate = 5;
+ if (ADC_Result < LIGHT_THRESHOLD)
continue;
- Time_Left = 15;
+ Time_Left = TIME_ON;
Increment = 1;
}
// Button 1 sets non-zero increment (and toggles it)
if (events & 1<<ev_btn1) {
- if (Duty_Cycle > 5000) {
+ P1OUT |= (BIT_GL|BIT_RL); // Set green and red LEDs on
+ Time_Indicate = 5;
+ if (Duty_Cycle > PWM_HALF) {
Time_Left = 0;
Increment = -1;
} else {
- Time_Left = 15;
+ Time_Left = TIME_ON;
Increment = 1;
}
}
// Timer event (100 ms) changed duty cycle and flashes red led
if (events & 1<<ev_tmr) {
- if (Time_Count++ > 10) {
- Time_Count = 0;
- P1OUT ^= BIT0;
- if (Time_Left)
- Time_Left--;
- else if (Duty_Cycle > 1)
- Increment = -1;
- }
- if (Increment == 0)
- continue;
- else if (Increment > 0)
- Duty_Cycle *= 2;
- else if (Increment < 0)
- Duty_Cycle /= 2;
- if (Duty_Cycle < 1) {
- Duty_Cycle = 1;
- Increment = 0;
+ if (Time_Indicate) {
+ Time_Indicate--;
+ if (!Time_Indicate)
+ P1OUT &= ~(BIT_RL|BIT_GL); // LEDs off
}
- if (Duty_Cycle > (10000-1)) {
- Duty_Cycle = 10000-1;
- Increment = 0;
+ if (Time_Left) {
+ Time_Left--;
+ if (!Time_Left)
+ if (Duty_Cycle)
+ Increment = -1;
}
- TA0CCR2 = Duty_Cycle;
+ if (Increment > 0) {
+ if (++Duty_Cycle >= (PWM_ORDER<<1)) {
+ Duty_Cycle = PWM_ORDER<<1;
+ Increment = 0;
+ }
+ } else if (Increment < 0) {
+ if (--Duty_Cycle < 1) {
+ Duty_Cycle = 0;
+ Increment = 0;
+ }
+ } else // Increment _was_ zero - no change!
+ continue;
+
+ TA0CCR2 = expon2(Duty_Cycle);
}
__bis_SR_register(LPM0_bits | GIE);
__no_operation();
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
- //}
}
+#ifndef ADC_VECTOR
+# define ADCMEM0 ADC10MEM
+# define ADC_VECTOR ADC10_VECTOR
+#endif
+
// ADC interrupt service routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=ADC_VECTOR
#error Compiler not supported!
#endif
{
+#ifdef ADCIV_NONE
switch(__even_in_range(ADCIV,ADCIV_ADCIFG))
{
case ADCIV_NONE:
case ADCIV_ADCINIFG:
break;
case ADCIV_ADCIFG:
+#endif
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
+#ifdef ADCIV_NONE
break;
default:
break;
}
+#endif
}
// GPIO interrupt service routine
#error Compiler not supported!
#endif
{
- if (P2IFG & BIT3) {
- irq_events |= 1<<ev_btn1;
- P2IFG &= ~BIT3; // Clear P1.3 IFG
- }
- if (P2IFG & BIT7) {
- irq_events |= 1<<ev_btn2;
- P2IFG &= ~BIT7; // Clear P1.3 IFG
- }
- if (P2IFG & BIT2) {
+ 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
+#if (PBTN() == P1)
+ __bic_SR_register_on_exit(LPM0_bits); // Wake up
+}
+// GPIO interrupt service routine
+#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
+#pragma vector=PORT1_VECTOR
+__interrupt void Port_1(void)
+#elif defined(__GNUC__)
+void __attribute__ ((interrupt(PORT1_VECTOR))) Port_1 (void)
+#else
+#error Compiler not supported!
+#endif
+{
+#endif /* (PBTN() == P1) */
+ if (PBTN(IFG) & BIT_BTN) {
+ irq_events |= 1<<ev_btn1;
+ PBTN(IFG) &= ~BIT_BTN; // Clear button IFG
+ }
+#ifdef HAVE_BTN2
+ if (PBTN(IFG) & BIT_BTN2) {
+ irq_events |= 1<<ev_btn2;
+ PBTN(IFG) &= ~BIT_BTN2; // Clear button 2 IFG
+ }
+#endif
+ __bic_SR_register_on_exit(LPM0_bits); // Wake up
}
projects / sensor-light.git / blobdiff