Certain GPIO pins could be programmed as external interrupt source, through which external devices (such as RF modules, buttons, switches, etc.) could generate interrupts.
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Difference between external event mode versus external interrupt mode for stm32 [duplicate]
I am configuring GPIOs for stm32f0 MCU using CubeMX. I encountered this "GPIO mode" setting. It seems that GPIO mode can be triggered by "External event mode" or "External interrupt mode". See image ...
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23 views
MCP391X Series External 24 Bit ADC Software Reset Problem(SPI reading behaves weird) [duplicate]
I have a strange problem and I couldn't find a solution for 1-2 months!!!
In my system I have MCP3919 and MCP3914 24 Bit external ADCs. PWM pin of MCU generates 4MHz clock for ADC main clock. And my ...
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1answer
80 views
AVR external interrupt triggering by the falling edge: for how long should I keep signal low to guarantee triggering?
The question header appeared to bee too long. I'm sorry for that.
So I have a schematic generating a short LOW on INT0 pin of ATmega48PA. From the simulation I figured out that the LOW level will be ...
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1answer
101 views
MCU External Interrupt False Triggering
Above is the picture describing the configuration outside the MCU.
Vin is 0 to 5V Peak to Peak square wave which may have 0 to 50 KHz frequency, or even higher.
The MCU is supposed to handle ...
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1answer
96 views
Interrupt INT0 on PIC32MX110F016 not working
I am trying to put the INT0 working in a PIC32MX110F016 but it seems it never goes there.
The INTO pin is Electrically powered with a pull-up resistor and when I press a tactile button it goes from ...
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2answers
1k views
STM32F7 gets stuck in external interrupt callback function
i am working on a project to connect a camera to an STM32F7 Discovery board using the DCMI interface.
The camera part works fine, but i have a strange problem with external interrupts from the ...
1
vote
2answers
132 views
Why won't my phototransistor interrupt my microcontroller?
I bought a couple of phototransistors. They all have one lead shorter than the other. I assume that, like normal diodes, this means that the longer lead goes to V+ and the short end goes to GND.
I ...
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2answers
337 views
stm32 external interrupt always pending
In my project based on stm32F107 i use four pins (PINE 12-15) to catch rising level on them.
My problem: two pins always produce external interrupts but there are no rising level on them and other ...
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1answer
164 views
Can't get AVR pin change interrupt to work
I'm trying to get a pin change interrupt on an Attiny2313 to work but i'm stuck,
the interrupt is not triggering.
I'm using the following code in main():
...
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1answer
32 views
ATtiny861 pin change interrupt on PA.2: error in datasheet?
I faced with some confusion in subject datasheet:
In one section PA.2 should be masking by PCIE1 bit as PA.2 is PCINT2 input and it should be within PCINT[7:0] and PCINT[15:12] range:
On the other ...
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vote
1answer
274 views
Interrupt on the XMEGA
I have 3 buttons connected to PIN1, PIN3, PIN5 of PORTA of an XMEGA. If pushed they deliver a falling edge.
I'm try to generate interrupt using those buttons, I started with one, here is what I ...
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7answers
379 views
MCUs which can trigger an interrupt on a port mask
(Hobby and learning, not a professional question.)
I'm designing a circuit which uses a CPLD to turn a half-dozen inputs into a single output which triggers an interrupt in a microcontroller.
Are ...
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1answer
121 views
Unexplained behavior pic port b on change interrupt
I am trying to configure the port b interrupt on change interrupts to work with a program I am writing with MC XC8 demo version. I am using a PIC16F628A I am using this code to initialize the pic for ...
0
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1answer
363 views
Why do we need Frequency Divider for external clock (GPS reference signal) for Frequency Counter?
Our senior project is to build a precision frequency counter which is using GPS signal as a reference. I looked up somebody else project online and found that I have to divide reference signal (...
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1answer
488 views
Why doesn't the STM32f0 go to the interrupt routine? (in the debugger)
I'm trying to execute my project in the debugger but it doesn't go to the interrupt routine. the project is correct and it works without the debugger nicely.
How do I use it?
Ok, here we go!
at ...
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1answer
507 views
The GPIO External Interrupt doesn't work
I have written this program for GPIO External Interrupt but it doesn't work. look at the program:
...
7
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1answer
2k views
LED blinks even when I don't press the button
I have written a program in Keil that blinks a LED via External GPIO Interrupt. Here is how I have configured it in STM32CubeMX:
At first, I enabled and configured RCC as you can see and configured ...
