// *************************************************************************************************
// @fn start_buzzer
// @brief Start buzzer output for a number of cylces
// @param u8 cycles Keep buzzer output for number of cycles
// u16 on_time Output buzzer for "on_time" ACLK ticks
// u16 off_time Do not output buzzer for "off_time" ACLK ticks
// @return none
// *************************************************************************************************
void start_buzzer(u8 cycles, u16 on_time, u16 off_time)
{
// Store new buzzer duration while buzzer is off
if (sBuzzer.time == 0)
{
sBuzzer.time = cycles;
sBuzzer.on_time = on_time;
sBuzzer.off_time = off_time;
// Need to init every time, because SimpliciTI claims same timer
// Reset TA1R, set up mode, TA1 runs from 32768Hz ACLK
TA1CTL = TACLR | MC_1 | TASSEL__ACLK;
// Set PWM frequency
TA1CCR0 = sBuzzer.steps;
// Enable IRQ, set output mode "toggle"
TA1CCTL0 = OUTMOD_4;
// Allow buzzer PWM output on P2.7
P2SEL |= BIT7;
// Activate Timer0_A3 periodic interrupts
fptr_Timer0_A3_function = toggle_buzzer;
Timer0_A3_Start(sBuzzer.on_time);
// Preload timer advance variable
sTimer.timer0_A3_ticks = sBuzzer.off_time;
// Start with buzzer output on
sBuzzer.state = BUZZER_ON_OUTPUT_ENABLED;
}
}
// *************************************************************************************************
// @fn button_repeat_on
// @brief Start button auto repeat timer.
// @param none
// @return none
// *************************************************************************************************
void button_repeat_on(u16 msec)
{
// Set button repeat flag
sys.flag.up_down_repeat_enabled = 1;
// Set Timer0_A3 function pointer to button repeat function
fptr_Timer0_A3_function = button_repeat_function;
// Timer0_A3 IRQ triggers every 200ms
Timer0_A3_Start(CONV_MS_TO_TICKS(msec));
}
