Contents
What is an ADC interrupt?
If you like it, share it. – In electronics, an analog-to-digital converter (ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal.
How is the timer interrupt used?
Timer interrupts allow you to perform a task at very specifically timed intervals regardless of what else is going on in your code. In this instructable I’ll explain how to setup and execute an interrupt in Clear Timer on Compare Match or CTC Mode.
How do I enable ADC interrupt?
Programming steps:
- Set the value in ADMUX register according to the ADC channel and the reference voltage.
- Set the Prescaler bits accordingly in ADCSRA register.
- Set the ADEN bit to enable the ADC.
- Set ADIE bit to enable ADC interrupt.
- Set ADATE bit to enable auto triggering.
- Set ADSC bit to start conversion.
How are ADC and timer interrupts used in Arduino?
It is based on ADC interrupts. Both impementations work alone but when I try to bring the code together it breaks. The timer and the ADC are initialzed like this: So my question is – Is it even possible to use those interrupts together? And how do I have to configure them to make it work. Or is this a dead end?
Can a main loop be used as an ADC interrupt?
Yes you can, jus three things: Try to use the main loop to do all you need, trying to programm a cyclic executive and use the interrupts only to activate flags or read ADC values. In some Atmel devices like Atmega16, you need to reset (setting it again) the ADC every time the ADC finish a measurement.
How often is an ADC ISR fired in Arduino?
This means that your ADC ISR is firing every 26 clock cycles with your current prescaler settings. On top of that, your TIMER1_COMPA ISR is also fired so frequently (every 64 cycles) that your ISR might actually take longer to execute than the desired time. You basically use all your time acquiring data and/or in your timer ISR.
How often to read ADC values in Arduino?
Try to use the main loop to do all you need, trying to programm a cyclic executive and use the interrupts only to activate flags or read ADC values. You can achive this by setting times for each task, for example, read the ADC every 5ms, Set the LEDs every 10ms, etc.