Ruakij/Geigercounter
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Fixed execution prior to tick, because of nextTick overflow before timer-overflow

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This commit is contained in:
Alexander B 2019-03-08 10:05:41 +01:00
parent e81bda822e
commit ccda41769f
1 changed files with 39 additions and 32 deletions
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19
Geigerzaehler/main.c
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@ -31,6 +31,7 @@ uint16_t signalOutput_led_nextTick = 0;
// Prescaling of timer [timer-speed: cpu-clock / prescaler]
// Modes: [1, 8, 64, 256, 1024]
uint8_t timer1_prescaler = 256;
uint16_t timer1_overflow_value = (2^16) -1; // Just for info
int main()
{
@ -40,9 +41,6 @@ int main()
// Inputs
DDRD &= (0 << PORTD2); // Activate input PD2
DDRD &= (0 << PORTD3); // Activate input PD3
//PORTD |= (1 << PORTD2); // Enable pull-up-resistor D2
//PORTD |= (1 << PORTD3); // Enable pull-up-resistor D3
// Todo [CRITICAL]: External pull-down resistors 10kOhm
// Outputs
DDRD |= (1 << PORTD4);
@ -69,7 +67,9 @@ int main()
/*
* HighVoltage boosting
*/
if(boost_highVoltage_nextTick > 0 && (uint16_t)TCNT1 >= boost_highVoltage_nextTick) // If we are on or after the tick it should be executed
if(boost_highVoltage_nextTick > 0) // If there is a nextTick
{
if((uint16_t)TCNT1 >= boost_highVoltage_nextTick && ((uint16_t)TCNT1-boost_highVoltage_nextTick) < (timer1_overflow_value/2)) // If we are on or after the tick it should be executed
{
// Flip pin state
PORTD ^= (1 << PORTD4);
@ -78,12 +78,15 @@ int main()
boost_highVoltage_nextTick = (uint16_t)TCNT1 + F_CPU/timer1_prescaler * 1/(boost_frequency/2); // Half of time it should be high/low
if(boost_highVoltage_nextTick == 0) boost_highVoltage_nextTick++; // If its 0, it stops, we dont want that
}
}
/*
* Signal output
*/
// Piezo
if(signalOutput_piezo_nextTick > 0 && (uint16_t)TCNT1 >= signalOutput_piezo_nextTick) // If we are on or after the tick it should be executed
if(signalOutput_piezo_nextTick > 0) // If there is a nextTick
{
if((uint16_t)TCNT1 >= signalOutput_piezo_nextTick && ((uint16_t)TCNT1-signalOutput_piezo_nextTick) < (timer1_overflow_value/2)) // If we are on or after the tick it should be executed
{
// Flip pin state
PORTD ^= (1 << PORTD5);
@ -98,8 +101,11 @@ int main()
signalOutput_piezo_nextTick = (uint16_t)TCNT1 + F_CPU/timer1_prescaler * signalOutput_piezo_time/1000; // Calculate nextTick based on time in ms
if(signalOutput_piezo_nextTick == 0) signalOutput_piezo_nextTick++; // If its 0, it stops, we dont want that
}
}
// LED
if(signalOutput_led_nextTick > 0 && (uint16_t)TCNT1 >= signalOutput_led_nextTick) // If we are on or after the tick it should be executed
if(signalOutput_led_nextTick > 0) // If there is a nextTick
{
if((uint16_t)TCNT1 >= signalOutput_led_nextTick && ((uint16_t)TCNT1-signalOutput_led_nextTick) < (timer1_overflow_value/2)) // If we are on or after the tick it should be executed
{
// Flip pin state
PORTD ^= (1 << PORTD6);
@ -115,6 +121,7 @@ int main()
if(signalOutput_led_nextTick == 0) signalOutput_led_nextTick++; // If its 0, it stops, we dont want that
}
}
}
sei(); // Activate global interrupts (after checks) [when an interrupt was fired, it will now be executed]
}