69 lines
1.8 KiB
ReStructuredText
69 lines
1.8 KiB
ReStructuredText
.. _renesas-ra_using_peripheral:
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Using peripherals
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=================
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For quick help information, please enter::
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help()
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You can access RA MCU's peripherals using MicroPython modules.
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To list supported modules, please enter::
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help('modules')
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Especially `machine` module and class :ref:`machine.Pin <machine.Pin>` are very important for using
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peripherals. Note that prefix 'u' is added to the module for MicroPython,
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so you can see "umachine" in the list but you can use it like "import machine".
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Using "from machine import Pin", Pin name is available corresponding to
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the RA MCU's pin name which are Pin.cpu.P000 and 'P000'.
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In addition, you can use 'LED1', 'LED2', 'SW1', and 'SW2' name if the board
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has these LEDs and switches.
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LED blinking
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------------
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As simple example, you can enter following program to blink LED1.
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Please enter key 4 times after the input of last time.sleep(1). ::
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import time
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from machine import Pin
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led1 = Pin('LED1')
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print(led1)
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while True:
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led1.on()
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time.sleep(1)
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led1.off()
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time.sleep(1)
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You can see the LED1 blinking per 1 second.
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If you want to stop the program, please enter CTRL-C. ::
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Traceback (most recent call last):
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File "<stdin>", line 5, in <module>
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KeyboardInterrupt:
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This message is displayed, and the program stops.
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The message means the program was interrupted at line 5 "while" statement.
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Using print(led1), you can confirm that LED1 is assigned to Pin.cpu.P106
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on the board.::
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Pin(Pin.cpu.P106, mode=Pin.OUT, pull=Pin.PULL_NONE, drive=Pin.LOW_POWER)
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So you can get the same result if Pin(Pin.cpu.P106) is specified
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instead of Pin('LED1'). ::
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import time
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from machine import Pin
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led1 = Pin(Pin.cpu.P106)
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print(led1)
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while True:
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led1.on()
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time.sleep(1)
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led1.off()
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time.sleep(1)
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