1.2. GPIO interrupt - Button detection

This demo is based on GPIO external interrupt mode.

1.2.1. Hardware Connection

This demo is based on BL706_IOT, add the button circuit by yourself, the connection method is as follows

   GPIO function         GPIO pin
----------------------------------
    SW1      <-->     GPIO11

1.2.2. Software Implementation

• See examples/gpio/gpio_int for the software code

static void gpio11_int_callback(uint32_t pin)
{
    MSG("gpio rising trigger !\r\n");
}

gpio_set_mode(GPIO_PIN_11,GPIO_SYNC_RISING_TRIGER_INT_MODE);
gpio_attach_irq(GPIO_PIN_11,gpio11_int_callback);
gpio_irq_enable(GPIO_PIN_11,ENABLE);

• Use the above code to configure GPIO11 as the GPIO rising edge interrupt trigger mode, and register the interrupt callback function.

1.2.3. Compile and Program

• CDK compilation

  Open project:gpio_int.cdkproj

  Refer to the steps of Guide to using CDK (like MDK Keil) under Windows to compile and download

• Command compilation

$ cd <sdk_path>/bl_mcu_sdk
$ make BOARD=bl706_iot APP=gpio_int

• Program

  See BLDevCube start guide

1.2.4. Experimental Phenomena

When the button is pressed, the serial port will print "gpio rising trigger !"