Hello,
From the blinky example, how would I go about blinking LED0 to LED1 or LED0 to LED2 like a knight rider circuit?
This is what I have done so far that works for LED0 and LED1:
/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <drivers/gpio.h>
/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS 500
/* The devicetree node identifier for the "led0" alias. */
#define LED0_NODE DT_ALIAS(led0)
#define LED1_NODE DT_ALIAS(led1)
/*
* A build error on this line means your board is unsupported.
* See the sample documentation for information on how to fix this.
*/
static const struct gpio_dt_spec led_0 = GPIO_DT_SPEC_GET(LED0_NODE, gpios);
static const struct gpio_dt_spec led_1 = GPIO_DT_SPEC_GET(LED1_NODE, gpios);
void main(void)
{
int ret0;
int ret1;
if (!device_is_ready(led_0.port)) {
return;
}
if (!device_is_ready(led_1.port)) {
return;
}
ret0 = gpio_pin_configure_dt(&led_0, GPIO_OUTPUT_ACTIVE);
if (ret0 < 0) {
return;
}
ret1 = gpio_pin_configure_dt(&led_1, GPIO_OUTPUT_ACTIVE);
if (ret1 < 0) {
return;
}
while (1) {
ret0 = gpio_pin_toggle_dt(&led_0);
if (ret0 < 0) {
return;
}
k_msleep(SLEEP_TIME_MS);
ret0 = gpio_pin_toggle_dt(&led_0);
ret1 = gpio_pin_toggle_dt(&led_1);
if (ret1 < 0) {
return;
}
k_msleep(SLEEP_TIME_MS);
ret1 = gpio_pin_toggle_dt(&led_1);
// ret0 = gpio_pin_toggle_dt(&led_0);
// if (ret0 < 0) {
// return;
// }
// k_msleep(SLEEP_TIME_MS);
// ret1 = gpio_pin_toggle_dt(&led_1);
// if (ret1 < 0) {
// return;
// }
// k_msleep(SLEEP_TIME_MS);
}
}
and code below is for LED0 to LED3
/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <drivers/gpio.h>
/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS 80
/* The devicetree node identifier for the "led0" alias. */
#define LED0_NODE DT_ALIAS(led0)
#define LED1_NODE DT_ALIAS(led1)
#define LED2_NODE DT_ALIAS(led2)
#define LED3_NODE DT_ALIAS(led3)
/*
* A build error on this line means your board is unsupported.
* See the sample documentation for information on how to fix this.
*/
static const struct gpio_dt_spec led_0 = GPIO_DT_SPEC_GET(LED0_NODE, gpios);
static const struct gpio_dt_spec led_1 = GPIO_DT_SPEC_GET(LED1_NODE, gpios);
static const struct gpio_dt_spec led_2 = GPIO_DT_SPEC_GET(LED2_NODE, gpios);
static const struct gpio_dt_spec led_3 = GPIO_DT_SPEC_GET(LED3_NODE, gpios);
void main(void)
{
int ret0;
int ret1;
int ret2;
int ret3;
if (!device_is_ready(led_0.port)) {
return;
}
if (!device_is_ready(led_1.port)) {
return;
}
if (!device_is_ready(led_2.port)) {
return;
}
if (!device_is_ready(led_3.port)) {
return;
}
/* Sets all the LEDs to OFF state */
ret0 = gpio_pin_configure_dt(&led_0, GPIO_OUTPUT_INACTIVE);
if (ret0 < 0) {
return;
}
ret1 = gpio_pin_configure_dt(&led_1, GPIO_OUTPUT_INACTIVE);
if (ret1 < 0) {
return;
}
ret2 = gpio_pin_configure_dt(&led_2, GPIO_OUTPUT_INACTIVE);
if (ret2 < 0) {
return;
}
ret3 = gpio_pin_configure_dt(&led_3, GPIO_OUTPUT_INACTIVE);
if (ret3 < 0) {
return;
}
while (1) {
/* Turns on LED0 */
ret0 = gpio_pin_toggle_dt(&led_0);
if (ret0 < 0) {
return;
}
k_msleep(SLEEP_TIME_MS);
/* Turns off LED0 and turns on LED1*/
ret0 = gpio_pin_toggle_dt(&led_0);
ret1 = gpio_pin_toggle_dt(&led_1);
if (ret1 < 0) {
return;
}
k_msleep(SLEEP_TIME_MS);
/* Turns off LED1 and turns on LED3*/
ret1 = gpio_pin_toggle_dt(&led_1);
ret3 = gpio_pin_toggle_dt(&led_3);
if (ret3 < 0) {
return;
}
k_msleep(SLEEP_TIME_MS);
/* Turns off LED3 and turns on LED2*/
ret3 = gpio_pin_toggle_dt(&led_3);
ret2 = gpio_pin_toggle_dt(&led_2);
if (ret2 < 0) {
return;
}
k_msleep(SLEEP_TIME_MS);
/* Turns off LED2*/
ret2 = gpio_pin_toggle_dt(&led_2);
// ret0 = gpio_pin_toggle_dt(&led_0);
// if (ret0 < 0) {
// return;
// }
// k_msleep(SLEEP_TIME_MS);
// ret1 = gpio_pin_toggle_dt(&led_1);
// if (ret1 < 0) {
// return;
// }
// k_msleep(SLEEP_TIME_MS);
}
}
I'd like to also ask any way to improve my code? optimize? that would be appreciated.
board: nrf52840dk
