PymateIO-Delaying - Revision history

Dodomi: /* Blocking example */

2026-06-29T22:34:32Z

Blocking example

← Older revision		Revision as of 00:34, 30 June 2026
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	[[File:PymateIO-DS18B20-Wiring.jpg]]		[[File:PymateIO-DS18B20-Wiring.jpg]]

	=== Blocking ~~example~~ ===		=== Blocking script ===

	Here follow a basic MicroPython script showing how to deal with the DS18B20 sensor.		Here follow a basic MicroPython script showing how to deal with the DS18B20 sensor.

2026-06-29T22:34:21Z

Pymate Non-Blocking example

← Older revision		Revision as of 00:34, 30 June 2026
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	</nowiki>		</nowiki>

	=== Pymate Non-Blocking ~~example~~ ===		=== Pymate Non-Blocking script ===

	This implementation do use the {{fname\|EventTimer}} class to create non-blocking delay.		This implementation do use the {{fname\|EventTimer}} class to create non-blocking delay.

2026-06-29T22:33:49Z

Pymate Non-Blocking example

← Older revision		Revision as of 00:33, 30 June 2026
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	roms = ds.scan()		roms = ds.scan()
	first_rom = roms[0] # Only remember first rom		first_rom = roms[0] # Only remember first rom
	print( "Found ~~devices~~", first_rom )		print( "Found device", first_rom )


	i = 0		i = 0

2026-06-29T22:33:04Z

Pymate Non-Blocking example

← Older revision		Revision as of 00:33, 30 June 2026
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	This implementation do use the {{fname\|EventTimer}} class to create non-blocking delay.		This implementation do use the {{fname\|EventTimer}} class to create non-blocking delay.

	~~The mainloop can run full speed as demonstrate~~ the {{fname\|i}} ~~variable~~ that ~~get incremented at~~ each ~~mainloop pass~~.		Once the {{fname\|EventTimer.set()}} called, the property {{fname\|done}} will the True only when the time is elapsed.

			Notes that {{fname\|done}} will be True only once for each {{fname\|EventTimer.set()}}.

	<syntaxhighlight lang="python" line>		<syntaxhighlight lang="python" line>
Line 121:		Line 123:
	</syntaxhighlight>		</syntaxhighlight>

	The incrementation of {{fname\|i}} ~~between~~ the {{fname\|convert_temp()}} and {{fname\|read_temp()}} ~~call demonstrates the effectiveness of non-blocking execution~~.		The mainloop can run full speed as demonstrates the {{fname\|i}} variable that get incremented at each mainloop pass.

			The incrementation of {{fname\|i}} shows the effectiveness of non-blocking delay for {{fname\|convert_temp()}} and {{fname\|read_temp()}} .

	<nowiki>Found devices bytearray(b'(\xf2\t\x94\x97\x03\x03\xfb')		<nowiki>Found devices bytearray(b'(\xf2\t\x94\x97\x03\x03\xfb')

2026-06-29T22:25:04Z

Pymate Non-Blocking example

@@ Line 87: / Line 87: @@
 This implementation do use the {{fname|EventTimer}} class to create non-blocking delay.
 <syntaxhighlight lang="python" line>
+from machine import Pin
 </syntaxhighlight>
 {{PYMATE-TRAILER}}

2026-06-29T21:31:54Z

Simple Example

@@ Line 27: / Line 27: @@
 [[File:PymateIO-DS18B20-Wiring.jpg]]
-=== Simple Example ===
+=== Blocking example ===
 Here follow a basic MicroPython script showing how to deal with the DS18B20 sensor.
@@ Line 33: / Line 33: @@
 This script makes a reading every 5 seconds (execution limited to 10 iteration).
-Unfortunately, this use blocking instructions like sleep_ms() and sleep().
+{{rbox-orange|Unfortunately, this use blocking instructions like sleep_ms() and sleep().}}
 <syntaxhighlight lang="python" line>
@@ Line 58: / Line 58: @@
 </syntaxhighlight>
 {{PYMATE-TRAILER}}

2026-06-29T21:22:06Z

Wiring DS18B20

← Older revision		Revision as of 23:22, 29 June 2026
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	[[File:PymateIO-DS18B20-Wiring.jpg]]		[[File:PymateIO-DS18B20-Wiring.jpg]]

			=== Simple Example ===

			Here follow a basic MicroPython script showing how to deal with the DS18B20 sensor.

			This script makes a reading every 5 seconds (execution limited to 10 iteration).

			Unfortunately, this use blocking instructions like sleep_ms() and sleep().

			<syntaxhighlight lang="python" line>
			from machine import Pin
			import onewire, ds18x20
			import time

			dat = Pin( "I2C4_SMB", Pin.IN )
			bus = onewire.OneWire(dat)
			ds = ds18x20.DS18X20( bus )

			roms = ds.scan()
			print( "Found devices", roms )

			for i in range(10):
			print( "%i: Read temperature" %i )
			ds.convert_temp()
			time.sleep_ms(750) # Required by OneWire protocol
			for rom in roms:
			print( 'ROM', rom, 'Temperature', ds.read_temp(rom) )
			time.sleep( 5 )

			print( "That's all Folks" )
			</syntaxhighlight>


	{{PYMATE-TRAILER}}		{{PYMATE-TRAILER}}

2026-06-29T17:52:43Z

Practical example

← Older revision		Revision as of 19:52, 29 June 2026
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	== Practical example ==		== Practical example ==
	xx		As practical example, we will read DS18B20 OneWire sensor connected on the Pymate Expansion port.

			The problem with the DS18B20 is required pause of 750ms between the temperature request and values reading.

			=== Wiring DS18B20 ===

			[[File:PymateIO-DS18B20-Wiring.jpg]]

	{{PYMATE-TRAILER}}		{{PYMATE-TRAILER}}

2026-06-29T15:54:19Z

Abstract

← Older revision		Revision as of 17:54, 29 June 2026
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	The solution for this is:		The solution for this is:
	* use the '''~~DelayTimer~~''' class		* use the '''EventTimer''' class
	* set the delay on the '''~~DelayTimer~~''' when the source event occurs.		* set the delay on the '''EventTimer''' when the source event occurs.
	* check the '''~~DelayTimer~~.done''' at every mainloop cycle.		* check the '''EventTimer.done''' at every mainloop cycle.
	* Once '''done''', it is time to executed the delayed code.		* Once '''done''', it is time to executed the delayed code.

	Remark: the '''done''' will be True only once for every '''set()'''!		Remark: the '''done''' will assert True '''only once''' for every '''set()'''!

			== Practical example ==
			xx

	{{PYMATE-TRAILER}}		{{PYMATE-TRAILER}}

2026-06-29T15:46:30Z

Abstract

← Older revision		Revision as of 17:46, 29 June 2026
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	The solution for this is:		The solution for this is:
	* use the '''~~TimeoutTimer~~''' class		* use the '''DelayTimer''' class
	* set the delay on the '''~~TimeoutTimer~~''' when the source event occurs.		* set the delay on the '''DelayTimer''' when the source event occurs.
	* check the '''~~TimeoutTimer~~.~~expired~~''' at every mainloop cycle.		* check the '''DelayTimer.done''' at every mainloop cycle.
	* Once ~~expired~~, it is time to executed the delayed code.		* Once '''done''', it is time to executed the delayed code.

			Remark: the '''done''' will be True only once for every '''set()'''!

	{{PYMATE-TRAILER}}		{{PYMATE-TRAILER}}