// *************************************************************************************************
// @fn Timer0_A4_Delay
// @brief Wait for some microseconds
// @param ticks (1 tick = 1/32768 sec)
// @return none
// *************************************************************************************************
void Timer0_A4_Delay(u16 ticks)
{
u16 value;
// Exit immediately if Timer0 not running - otherwise we'll get stuck here
if ((TA0CTL & (BIT4 | BIT5)) == 0) return;
// Disable timer interrupt
TA0CCTL4 &= ~CCIE;
// Clear delay_over flag
sys.flag.delay_over = 0;
// Add delay to current timer value
value = TA0R + ticks;
// Update CCR
TA0CCR4 = value;
// Reset IRQ flag
TA0CCTL4 &= ~CCIFG;
// Enable timer interrupt
TA0CCTL4 |= CCIE;
// Wait for timer IRQ
while (1)
{
// Delay in LPM
to_lpm();
#ifdef USE_WATCHDOG
// Service watchdog
WDTCTL = WDTPW + WDTIS__512K + WDTSSEL__ACLK + WDTCNTCL;
#endif
#ifdef CONFIG_STOP_WATCH
// Redraw stopwatch display
if (is_stopwatch_run()) display_stopwatch(LINE2, DISPLAY_LINE_UPDATE_PARTIAL);
#endif
// Check stop condition
if (sys.flag.delay_over) break;
}
}
__interrupt void PORT2_ISR(void)
#endif
{
u8 int_flag, int_enable;
u8 buzzer = 0;
#ifndef CONFIG_SWAP
u8 simpliciti_button_event = 0;
static u8 simpliciti_button_repeat = 0;
#endif
// Clear button flags
button.all_flags = 0;
// Remember interrupt enable bits
int_enable = BUTTONS_IE;
// Store valid button interrupt flag
int_flag = BUTTONS_IFG & int_enable;
#ifndef CONFIG_SWAP
// ---------------------------------------------------
// While SimpliciTI stack is active, buttons behave differently:
// - Store button events in SimpliciTI packet data
// - Exit SimpliciTI when button DOWN was pressed
if (is_rf())
{
// Erase previous button press after a number of resends (increase number if link quality is low)
// This will create a series of packets containing the same button press
// Necessary because we have no acknowledge
// Filtering (edge detection) will be done by receiver software
if (simpliciti_button_repeat++ > 6)
{
simpliciti_data[0] &= ~0xF0;
simpliciti_button_repeat = 0;
}
if ((int_flag & BUTTON_STAR_PIN) == BUTTON_STAR_PIN)
{
simpliciti_data[0] |= SIMPLICITI_BUTTON_STAR;
simpliciti_button_event = 1;
}
else if ((int_flag & BUTTON_NUM_PIN) == BUTTON_NUM_PIN)
{
simpliciti_data[0] |= SIMPLICITI_BUTTON_NUM;
simpliciti_button_event = 1;
}
else if ((int_flag & BUTTON_UP_PIN) == BUTTON_UP_PIN)
{
simpliciti_data[0] |= SIMPLICITI_BUTTON_UP;
simpliciti_button_event = 1;
}
else if ((int_flag & BUTTON_DOWN_PIN) == BUTTON_DOWN_PIN)
{
simpliciti_flag |= SIMPLICITI_TRIGGER_STOP;
}
// Trigger packet sending inside SimpliciTI stack
if (simpliciti_button_event) simpliciti_flag |= SIMPLICITI_TRIGGER_SEND_DATA;
}
else // Normal operation
{
#endif
// Debounce buttons
if ((int_flag & ALL_BUTTONS) != 0)
{
// Disable PORT2 IRQ
__disable_interrupt();
BUTTONS_IE = 0x00;
__enable_interrupt();
// Debounce delay 1
Timer0_A4_Delay(CONV_MS_TO_TICKS(BUTTONS_DEBOUNCE_TIME_IN));
// Reset inactivity detection
sTime.last_activity = sTime.system_time;
}
// ---------------------------------------------------
// STAR button IRQ
if (IRQ_TRIGGERED(int_flag, BUTTON_STAR_PIN))
{
// Filter bouncing noise
if (BUTTON_STAR_IS_PRESSED)
{
button.flag.star = 1;
// Generate button click
buzzer = 1;
}
}
// ---------------------------------------------------
// NUM button IRQ
else if (IRQ_TRIGGERED(int_flag, BUTTON_NUM_PIN))
{
// Filter bouncing noise
if (BUTTON_NUM_IS_PRESSED)
{
button.flag.num = 1;
// Generate button click
buzzer = 1;
if( !sys.flag.lock_buttons)
{
#ifdef CONFIG_STOP_WATCH
// Faster reaction for stopwatch split button press
if (is_stopwatch_run())
{
split_stopwatch();
button.flag.num = 0;
}
#endif
}
}
}
// ---------------------------------------------------
// UP button IRQ
else if (IRQ_TRIGGERED(int_flag, BUTTON_UP_PIN))
{
// Filter bouncing noise
if (BUTTON_UP_IS_PRESSED)
{
button.flag.up = 1;
// Generate button click
buzzer = 1;
}
}
// ---------------------------------------------------
// DOWN button IRQ
else if (IRQ_TRIGGERED(int_flag, BUTTON_DOWN_PIN))
{
// Filter bouncing noise
if (BUTTON_DOWN_IS_PRESSED)
{
button.flag.down = 1;
// Generate button click
buzzer = 1;
if( !sys.flag.lock_buttons)
{
#ifdef CONFIG_STOP_WATCH
// Faster reaction for stopwatch stop button press
if (is_stopwatch_run())
{
stop_stopwatch();
button.flag.down = 0;
}
// Faster reaction for stopwatch start button press
else if (is_stopwatch_stop())
{
start_stopwatch();
button.flag.down = 0;
}
#endif
}
}
}
// ---------------------------------------------------
// B/L button IRQ
else if (IRQ_TRIGGERED(int_flag, BUTTON_BACKLIGHT_PIN))
{
// Filter bouncing noise
if (BUTTON_BACKLIGHT_IS_PRESSED)
{
sButton.backlight_status = 1;
sButton.backlight_timeout = 0;
P2OUT |= BUTTON_BACKLIGHT_PIN;
P2DIR |= BUTTON_BACKLIGHT_PIN;
button.flag.backlight = 1;
}
}
#ifndef CONFIG_SWAP
}
#else
// Notify button event to the SWAP browser
if (isSwapMode())
swButtonEvent();
#endif
// Trying to lock/unlock buttons?
if ((button.flag.num && button.flag.down) || (button.flag.star && button.flag.up))
{
// No buzzer output
buzzer = 0;
button.all_flags = 0;
}
// Generate button click when button was activated
if (buzzer)
{
// Any button event stops active alarm
#ifdef CONFIG_ALARM
if (sAlarm.state == ALARM_ON)
{
stop_alarm();
button.all_flags = 0;
}
else
#endif
#ifdef CONFIG_EGGTIMER
if (sEggtimer.state == EGGTIMER_ALARM) {
stop_eggtimer_alarm();
button.all_flags = 0;
}
else
#endif
if (!sys.flag.up_down_repeat_enabled && !sys.flag.no_beep)
{
start_buzzer(1, CONV_MS_TO_TICKS(20), CONV_MS_TO_TICKS(150));
}
// Debounce delay 2
Timer0_A4_Delay(CONV_MS_TO_TICKS(BUTTONS_DEBOUNCE_TIME_OUT));
}
#ifdef FEATURE_PROVIDE_ACCEL
// ---------------------------------------------------
// Acceleration sensor IRQ
if (IRQ_TRIGGERED(int_flag, AS_INT_PIN))
{
// Get data from sensor
request.flag.acceleration_measurement = 1;
}
#endif
// ---------------------------------------------------
// Pressure sensor IRQ
if (IRQ_TRIGGERED(int_flag, PS_INT_PIN))
{
// Get data from sensor
request.flag.altitude_measurement = 1;
}
// ---------------------------------------------------
// Safe long button event detection
if(button.flag.star || button.flag.num)
{
// Additional debounce delay to enable safe high detection
Timer0_A4_Delay(CONV_MS_TO_TICKS(BUTTONS_DEBOUNCE_TIME_LEFT));
// Check if this button event is short enough
if (BUTTON_STAR_IS_PRESSED) button.flag.star = 0;
if (BUTTON_NUM_IS_PRESSED) button.flag.num = 0;
}
// Reenable PORT2 IRQ
__disable_interrupt();
BUTTONS_IFG = 0x00;
BUTTONS_IE = int_enable;
__enable_interrupt();
// Exit from LPM3/LPM4 on RETI
__bic_SR_register_on_exit(LPM4_bits);
}
