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Hi all,
I am working on AC dimmer circuit , for that i have have interfaced the Zero Cross Detection circuit with ATmega16 INT0 pin. INT0 is configured as a rising edge. here i am attaching image which shows the working of Zero cross detection is good. but when i interface its output with ATmega INT0 pin, the Zero Cross Pulsed gets down and nothing happen on INT0 pin. i have tested INT0 code separately which also working as expected. I am not getting where i am doing anything wrong? please somebody help me who has worked with such project ever before
Here is a code snip which gives INT0 routine and Int0 Configuration as rising edge.
When i use this Zero Cross Detection pulses as a normal switch its working good, but when i use it with INT0 pin the pulse get destroyed and nothing happens as attached images
I am working on AC dimmer circuit , for that i have have interfaced the Zero Cross Detection circuit with ATmega16 INT0 pin. INT0 is configured as a rising edge. here i am attaching image which shows the working of Zero cross detection is good. but when i interface its output with ATmega INT0 pin, the Zero Cross Pulsed gets down and nothing happen on INT0 pin. i have tested INT0 code separately which also working as expected. I am not getting where i am doing anything wrong? please somebody help me who has worked with such project ever before
Here is a code snip which gives INT0 routine and Int0 Configuration as rising edge.
Rich (BB code):
/* * Written in AVR Studio 5 / AVR Studio 6 * Compiler: AVR GNU C Compiler (GCC) * * Author: AVR Tutorials * Website: www.AVR-Tutorials.com */ #include <avr/io.h> #include <avr/interrupt.h> #define F_CPU 16000000UL #include <util/delay.h> #define DataPort PORTC // Using PortC as our Dataport #define DataDDR DDRC //Interrupt Service Routine for INT0 ISR(INT0_vect) { unsigned char i, temp; cli(); //_delay_ms(500); // Software debouncing control //temp = DataPort; // Save current value on DataPort /* This for loop blink LEDs on Dataport 5 times*/ DataPort = 0x00; for(i = 0; i<100; i++) { _delay_us(200); // Wait 5 seconds //_delay_us(200); // Wait 5 seconds } DataPort = 0xFF; //DataPort = temp; //Restore old value to DataPort sei(); } int main(void) { DDRD = 1<<PD2; // Set PD2 as input (Using for interupt INT0) PORTD = 1<<PD2; // Enable PD2 pull-up resistor DataDDR = 0xFF; // Configure Dataport as output DataPort = 0xFF; // Initialise Dataport to 1 GICR = 1<<INT0; // Enable INT0 MCUCR = 1<<ISC01 | 1<<ISC00; // Trigger INT0 on rising edge sei(); //Enable Global Interrupt while(1) { /* if(DataPort >= 0x80) DataPort = 1; else DataPort = DataPort << 1; // Shift to the left _delay_ms(500); // Wait 5 seconds */ if(!(PIN_1 & (1<<SW_1))) //If switch is pressed { toggle(LED_PORT,LED_1); _delay_ms(1000); } else if(!(PIN_1 & (1<<SW_2))) //If switch is pressed { toggle(LED_PORT,LED_2); _delay_ms(1000); } } }
