Interrupts - Revision history

BenR at 09:21, 24 September 2020

2020-09-24T09:21:06Z

DavidA at 08:26, 2 July 2019

2019-07-02T08:26:27Z

DavidA at 08:24, 2 July 2019

2019-07-02T08:24:55Z

BenR: /* Software PWM */

2017-02-17T16:29:11Z

Software PWM

BenR at 16:01, 17 February 2017

2017-02-17T16:01:33Z

BenR at 11:38, 8 August 2016

2016-08-08T11:38:58Z

BenR at 10:43, 8 August 2016

2016-08-08T10:43:38Z

BenR: Created page with "Sidebar: Flowcode Help Overview:ChipSpecific ''See Interrupt Icon Properties'' Most devices have built in interrupts users can call by using the Int..."

2016-08-08T10:29:16Z

Created page with "<sidebar>Sidebar: Flowcode Help Overview:ChipSpecific</sidebar> ''See Interrupt Icon Properties'' Most devices have built in interrupts users can call by using the Int..."

New page

<sidebar>Sidebar: Flowcode Help Overview:ChipSpecific</sidebar>
''See [[Interrupt Icon Properties]]''

Most devices have built in interrupts users can call by using the Interrupt flowchart icon.

Interrupts can be used to temporarily pause the operation of the microcontroller and allow something more urgent to happen before continuing where it left off.

==Timer Interrupts==

Timer interrupts are useful for monitoring the passage of time. Whether you want something to happen on a regular tick or simply want to measure the passage of time a timer interrupt can prove to be very handy.

===Quadrature Encoder using Timer Based Polling===

Example program showing how to use a quadrature encoder component using a polling method via a timer interrupt.

{{Fcfile|Quad_Encoder_Timer.fcfx|Quad_Encoder_Timer}}

===RGB LED Control using Timer===

Example program showing how to control a RGB LED using a timer interrupt to set the LED refresh rate, uses three analogue sliders to set the output colour (PWM duty) of the R, G and B LEDs.

{{Fcfile|RGB_LED.fcfx|RGB LED Example}}

==INT Single Pin Interrupts==

The INT type interrupts allow you to monitor the state of a single port pin.

Normally you can choose if the interrupt macro is called when the port pin state changes on the rising edge or falling edge.

===Counting Pulses using INT===

Example program showing how to use a single pin interrupt (INT) to count the number of pulses arriving on an input pin.

{{Fcfile|INT_Pulse_Counter.fcfx|INT_Pulse_Counter}}

==IOC (Interrupt On Change) Multiple Pin Interrupts==

The IOC type interrupts allow you to monitor the state of a number of port pins.

Different chips have different levels of IOC support ranging from a few pins on the chip to all of the pins.

Chips with advanced IOC support allow you to choose the pins you wish to use using the IOC interrupt properties.

If any of the enabled pins change state then the interrupt macro is triggered.

===Quadrature Encoder using IOC===

Example program showing how to use a quadrature encoder component using a interrupt on pin state change interrupt (IOC).

{{Fcfile|Quad_Encoder_IOC.fcfx|Quad_Encoder_IOC}}

===Counting Pulses using IOC===

Example program showing how to use a interrupt on pin state change interrupt (IOC) to individually count the number of pulses arriving on input pins.

{{Fcfile|IOC_Pulse_Counter.fcfx|IOC_Pulse_Counter}}

==RXINT UART Receive Interrupts==

The RXINT interrupt allows the interrupt macro to be called whenever a byte is received by a hardware UART channel.

===Communications Bridge Using UART RXINT===

Example program to listen for incoming bytes on the UART, any bytes that are received are placed into the circular buffer ready to be processed. In this case forwarded onto a computer using the USB serial connection.

{{Fcfile|CommsBuffer.fcfx|UART to USB Serial Data Bridge}}

← Older revision		Revision as of 09:21, 24 September 2020
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	Interrupts can be used to temporarily pause the operation of the microcontroller and allow something more urgent to happen before continuing where it left off.		Interrupts can be used to temporarily pause the operation of the microcontroller and allow something more urgent to happen before continuing where it left off.
		+
		+	Lets give a simple example of this in real life. You might be playing a video game (performing the main program function) when the phone rings (the interrupt event) you pause the game and go and answer the phone (interrupt service macro) when the phone call is complete you go back and unpause the game and continue from where you left off.

← Older revision		Revision as of 08:26, 2 July 2019
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	''See [[Interrupt Icon Properties]]''		''See [[Interrupt Icon Properties]]''
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← Older revision		Revision as of 08:24, 2 July 2019
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−	~~<sidebar>Sidebar: Flowcode Help Overview:ChipSpecific</sidebar>~~
	''See [[Interrupt Icon Properties]]''		''See [[Interrupt Icon Properties]]''

@@ Line 21: / Line 21: @@
 {{Fcfile|SoftPWM.fcfx|Software PWM}}
-[[File:SwPWMLEDs.jpg]]
+[[File:SwPWMLEDs.gif]]
 ===Quadrature Encoder using Timer Based Polling===

← Older revision		Revision as of 16:01, 17 February 2017
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	Timer interrupts are useful for monitoring the passage of time. Whether you want something to happen on a regular tick or simply want to measure how long something has taken a timer interrupt can prove to be very handy tool.		Timer interrupts are useful for monitoring the passage of time. Whether you want something to happen on a regular tick or simply want to measure how long something has taken a timer interrupt can prove to be very handy tool.
		+
		+
		+	===Software PWM===
		+
		+	Example program showing how to generate software PWM to drive multiple LEDs. Here we have a knight rider effect using eight LEDs. Each LED has a duty value between 0 (off) and 63 (bright on).
		+
		+	{{Fcfile\|SoftPWM.fcfx\|Software PWM}}
		+
		+	[[File:SwPWMLEDs.jpg]]

← Older revision		Revision as of 11:38, 8 August 2016
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	==Timer Interrupts==		==Timer Interrupts==

−	Timer interrupts are useful for monitoring the passage of time. Whether you want something to happen on a regular tick or simply want to measure ~~the passage of time~~ a timer interrupt can prove to be very handy.	+	Timer interrupts are useful for monitoring the passage of time. Whether you want something to happen on a regular tick or simply want to measure how long something has taken a timer interrupt can prove to be very handy tool.

← Older revision		Revision as of 10:43, 8 August 2016
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−	===Counting Pulses using IOC===	+	===Counting Multiple Pulses using IOC===

	Example program showing how to use a interrupt on pin state change interrupt (IOC) to individually count the number of pulses arriving on input pins.		Example program showing how to use a interrupt on pin state change interrupt (IOC) to individually count the number of pulses arriving on input pins.