README.md

11 - ARM timer & GPIO interrupt

Description

This examples demonstrates the use of interrupts coming simultaneously from multiple different peripherals. One interrupt comes periodically from the ARM timer, and the second one comes from a GPIO pin (e.g. a button). The timer interrupt toggles an LED connected to pin 47, and the GPIO interrupt toggles an LED connected to pin 48.

External peripherals

Here is the content of peripherals.json used in this example. It connects two LEDs to GPIO pins 47 and 48. It also connects a push-down button to GPIO pin 46.

{
  "peripherals": [
    {
      "name" : "Button",
      "connection" : [ 46 ],
      "lib_dir" : "peripherals",
      "lib_name" : "button"
    },
    {
      "name" : "LED (timer)",
      "connection" : [ 47 ],
      "lib_dir" : "peripherals",
      "lib_name" : "led"
    },
    {
      "name" : "LED (GPIO)",
      "connection" : [ 48 ],
      "lib_dir" : "peripherals",
      "lib_name" : "led"
    }
  ]
}