Hello,
Trying to use a code from the DevAcademy on buttons below but having a bit of trouble with modifying it.
My aim is a counter that reads how many buttons pressed I made so far but it seems to count indefinitely.
May I ask assistance with it?
/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
* Note:
* Tested on nRF Connect SDK Version : 2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/gpio.h>
/* STEP 9 - Increase the sleep time from 100ms to 10 minutes */
// #define SLEEP_TIME_MS 10*60*1000
#define SLEEP_TIME_MS 1
/* SW0_NODE is the devicetree node identifier for the node with alias "sw0" */
#define SW0_NODE DT_ALIAS(sw0)
static const struct gpio_dt_spec button = GPIO_DT_SPEC_GET(SW0_NODE, gpios);
/* LED0_NODE is the devicetree node identifier for the node with alias "led0". */
#define LED0_NODE DT_ALIAS(led0)
static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED0_NODE, gpios);
/* STEP 4 - Define the callback function */
int button_pressed(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
{
gpio_pin_toggle_dt(&led);
if (gpio_pin_get_dt(&led)) {
return 1;
}
return 0;
}
/* STEP 5 - Define a variable of type static struct gpio_callback */
static struct gpio_callback button_cb_data;
void main(void)
{
int ret;
int count = 0;
if (!device_is_ready(led.port)) {
return;
}
if (!device_is_ready(button.port)) {
return;
}
ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE);
if (ret < 0) {
return;
}
ret = gpio_pin_configure_dt(&button, GPIO_INPUT);
if (ret < 0) {
return;
}
/* STEP 3 - Configure the interrupt on the button's pin */
ret = gpio_pin_interrupt_configure_dt(&button, GPIO_INT_EDGE_TO_ACTIVE );
/* STEP 6 - Initialize the static struct gpio_callback variable */
gpio_init_callback(&button_cb_data, button_pressed, BIT(button.pin));
/* STEP 7 - Add the callback function by calling gpio_add_callback() */
gpio_add_callback(button.port, &button_cb_data);
if (led.port) {
while (1) {
if (gpio_pin_get_dt(&button)==1) {
count++;
printk("%d\n", count);
}
k_msleep(SLEEP_TIME_MS);
}
}
// while (1) {
// /* STEP 8 - Remove the polling code */
// k_msleep(SLEEP_TIME_MS);
// }
}
Board: nrf52840dk
