Ruakij/Geigercounter
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JohnD 2019-03-05 13:35:56 +01:00
commit a4ebc321a2
2 changed files with 18 additions and 8 deletions
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20
Geigerzaehler/main.c
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@ -45,11 +45,11 @@ int main()
PORTD |= (1<<3); // Enable pull-up-resistor Pin-D3 PORTD |= (1<<3); // Enable pull-up-resistor Pin-D3
// Interrupt for INT0 Pin-D2 High-voltage check // Interrupt for INT0 Pin-D2 High-voltage check
EICRA |= (0 << ISC01)|(1 << ISC00); // Only at any edge [0|1] EICRA |= (0 << ISC01)|(1 << ISC00); // Only at any edge [Code: 01]
EIMSK |= (1 << INT0); // Activate Interrupt INT0 EIMSK |= (1 << INT0); // Activate Interrupt INT0
// Interrupt for INT1 Pin-D3 Counter-click // Interrupt for INT1 Pin-D3 Counter-click
EICRA |= (1 << ISC11)|(1 << ISC10); // Only at rising edge [1|1] EICRA |= (1 << ISC11)|(1 << ISC10); // Only at rising edge [Code: 11]
EIMSK |= (1 <<INT1); // Activate Interrupt INT1 EIMSK |= (1 <<INT1); // Activate Interrupt INT1
sei(); // Activate global interrupts sei(); // Activate global interrupts
@ -95,21 +95,21 @@ int main()
if(currTick >= signal_Output_nextTick) // If we are on or after the tick it should be executed if(currTick >= signal_Output_nextTick) // If we are on or after the tick it should be executed
{ {
// Set pin according to next exec // Set pin according to next exec
if(boost_highVoltage_nextHigh) // Set it high if(signal_Output_nextHigh) // Set it high
{ {
bit_set(PD5, 1); bit_set(PD5, 1);
bit_set(PD6, 1); bit_set(PD6, 1);
boost_highVoltage_nextHigh = false; // Next is low signal_Output_nextHigh = false; // Next is low
} }
else // Set it low else // Set it low
{ {
bit_set(PD5, 0); bit_set(PD5, 0);
bit_set(PD6, 0); bit_set(PD6, 0);
boost_highVoltage_nextHigh = true; // Next is high signal_Output_nextHigh = true; // Next is high
} }
// When the signal should stop // When the signal should stop
boost_highVoltage_nextTick = currTick + 101 // Todo: Add calculation for PWM high/low time signal_Output_nextTick = currTick + 101 // Todo: Add calculation for signalOutput low time
} }
} }
} }
@ -119,7 +119,8 @@ int main()
* Interrupt-handler * Interrupt-handler
* ISR - Interrupt service routine * ISR - Interrupt service routine
*/ */
// Address: 0x001 INT0 // Address: 0x001 INT0 - Only at any edge [Code: 01]
// Handles: Over/Below working voltage
ISR(INT0_vect) ISR(INT0_vect)
{ {
if(PIND&0x20 == 0x00) // Falling edge if(PIND&0x20 == 0x00) // Falling edge
@ -136,11 +137,14 @@ ISR(INT0_vect)
reti(); // Exit interrupt-handler reti(); // Exit interrupt-handler
} }
// Address: 0x002 INT1 - Only at rising edge [Code: 11]
// Handles: Counter tube "tick"
ISR(INT1_vect) ISR(INT1_vect)
{ {
// Tick detected, signalOutput // Tick detected, signalOutput
enable_signalOutput = true; enable_signalOutput = true;
// Execute immediately
signal_Output_nextTick = 0;
reti(); // Exit interrupt-handler reti(); // Exit interrupt-handler
} }

6
README.md Normal file
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@ -0,0 +1,6 @@
## School project - Geiger counter based on a Geiger-Müller counter tube
Microcontroller code written in C
Microcontroller: AtMega328P<br>
Board: Arduino Nano