GPIO

General Purpose Input Output is referred to as GPIO, or bus extender.

High speed gpio and universal gpio on the K210 On the K210, GPIO has the following characteristics:

• High speed GPIO: The high-speed GPIO is GPIOHS, a total of 32. Has the following characteristics: • Configurable input and output signals • Each IO has an independent interrupt source • Interrupt support edge trigger and level trigger • Each IO can be assigned to one of the 48 pins on the FPIOA • Configurable up and down, or high resistance

• General GPIO:

  There are 8 general-purpose GPIOs with the following characteristics: • 8 IOs use one interrupt source • Configurable input and output signals • Configurable trigger IO total interrupt, edge trigger and level trigger • Each IO can be assigned to one of the 48 pins on the FPIOA

Attention:

Some GPIOHS used by default, don't use these GPIOHS if you don't have to, GPIOHS used as follows:

1. Constructor

Class GPIO(ID, MODE, PULL, VALUE)

Create a new SPI object with the specified parameters

1.1. Parameters

• ID: The GPIO pin used (must be specified using the constants in GPIO)

• MODE: GPIO mode

  • GPIO.IN is the input mode

  • GPIO.OUT is the output mode

• PULL: GPIO pull-down mode * • GPIO.PULL_UP pull up

  • GPIO.PULL_DOWN dropdown

  • GPIO.PULL_NONE does not pull up or pull down

2. method

2.1. value

Modify/read GPIO pin status

GPIO.value([value])

Parameters

• [value]: optional parameter, if this parameter is not empty, return the current GPIO pin status

return value

Returns the current GPIO pin status if the [value] parameter is not empty

2.2. irq

Configure an interrupt handler to call when the pin's trigger source is active. If the pin mode is pin.in, the trigger source is an external value on the pin.

GPIO.irq(CALLBACK_FUNC, TRIGGER_CONDITION, GPIO.WAKEUP_NOT_SUPPORT, PRORITY)

Parameters

• CALLBACK_FUNC: callback function, called when the interrupt is triggered, it has two parameters, GPIO and PIN_NUM

  • GPIO returns a GPIO object

  • PIN_NUM returns the GPIO pin number that triggered the interrupt (only GPIOHS supports interrupts, so the pin number here is also the GPIOHS pin number)

• TRIGGER_CONDITION: Trigger interrupt when GPIO pin is in this state

  • GPIO.IRQ_RISING rising edge trigger

  • GPIO.GPIO.IRQ_FALLING falling edge trigger

  • GPIO.IRQ_BOTH is triggered on both rising and falling edges

return value

no

2.3. disirq

Close interrupt

GPIO.disirq()

Parameters

no

return value

no

2.4. mode

GPIO mode

GPIO.mode(MODE)

Parameters

• MODE

  • GPIO.IN is the input mode

  • GPIO.OUT is the output mode

return value

no

2.5. pull

GPIO pull-down mode

GPIO.pull(PULL)

Parameters

• PULL

  • GPIO.IRQ_RISING rising edge trigger

  • GPIO.IRQ_FALLING falling edge trigger

  • GPIO.IRQ_BOTH is triggered on both rising and falling edges

return value

no

3. Constant

• GPIO0: GPIO0
• GPIO1: GPIO1
• GPIO2: GPIO2
• GPIO3: GPIO3
• GPIO4: GPIO4
• GPIO5: GPIO5
• GPIO6: GPIO6
• GPIO7: GPIO7
• GPIOHS0: GPIOHS0
• GPIOHS1: GPIOHS1
• GPIOHS2: GPIOHS2
• GPIOHS3: GPIOHS3
• GPIOHS4: GPIOHS4
• GPIOHS5: GPIOHS5
• GPIOHS6: GPIOHS6
• GPIOHS7: GPIOHS7
• GPIOHS8: GPIOHS8
• GPIOHS9: GPIOHS9
• GPIOHS10: GPIOHS10
• GPIOHS11: GPIOHS11
• GPIOHS12: GPIOHS12
• GPIOHS13: GPIOHS13
• GPIOHS14: GPIOHS14
• GPIOHS15: GPIOHS15
• GPIOHS16: GPIOHS16
• GPIOHS17: GPIOHS17
• GPIOHS18: GPIOHS18
• GPIOHS19: GPIOHS19
• GPIOHS20: GPIOHS20
• GPIOHS21: GPIOHS21
• GPIOHS22: GPIOHS22
• GPIOHS23: GPIOHS23
• GPIOHS24: GPIOHS24
• GPIOHS25: GPIOHS25
• GPIOHS26: GPIOHS26
• GPIOHS27: GPIOHS27
• GPIOHS28: GPIOHS28
• GPIOHS29: GPIOHS29
• GPIOHS30: GPIOHS30
• GPIOHS31: GPIOHS31
• GPIO.IN: input mode
• GPIO.OUT: output mode
• GPIO.PULL_UP: Pull up
• GPIO.PULL_DOWN: drop down
• GPIO.PULL_NONE: does not pull up or pull down
• GPIO.IRQ_RISING: rising edge trigger
• GPIO.IRQ_FALLING: falling edge trigger
• GPIO.IRQ_BOTH: Both rising and falling edges are triggered

3.1. DEMO1

import utime
from Maix import GPIO
fm.register(board_info.LED_R,fm.fpioa.GPIO0)
led_r=GPIO(GPIO.GPIO0,GPIO.OUT)
utime.sleep_ms(500)
led_r.value()
fm.unregister(board_info.LED_R,fm.fpioa.GPIO0)

3.2. DEMO2

import utime
from Maix import GPIO
fm.register(board_info.LED_R,fm.fpioa.GPIO0)
led_r=GPIO(GPIO.GPIO0,GPIO.IN)
utime.sleep_ms(500)
led_r.value()
fm.unregister(board_info.LED_R,fm.fpioa.GPIO0)

3.3. DEMO3

import utime
from Maix import GPIO
def test_irq(GPIO,pin_num):
    print("key",pin_num,"\n")

fm.register(board_info.BOOT_KEY,fm.fpioa.GPIOHS0)
key=GPIO(GPIO.GPIOHS0,GPIO.IN,GPIO.PULL_NONE)
utime.sleep_ms(500)
key.value()
key.irq(test_irq,GPIO.IRQ_BOTH,GPIO.WAKEUP_NOT_SUPPORT,7)

key.disirq()
fm.unregister(board_info.BOOT_KEY,fm.fpioa.GPIOHS0)