82e8b0e826
Update `struct pwm_dt_spec` use with pwm_is_ready_dt() Signed-off-by: Nick Ward <nix.ward@gmail.com>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file Sample app to demonstrate PWM-based RGB LED control
|
|
*/
|
|
|
|
#include <zephyr/kernel.h>
|
|
#include <zephyr/sys/printk.h>
|
|
#include <zephyr/device.h>
|
|
#include <zephyr/drivers/pwm.h>
|
|
|
|
static const struct pwm_dt_spec red_pwm_led =
|
|
PWM_DT_SPEC_GET(DT_ALIAS(red_pwm_led));
|
|
static const struct pwm_dt_spec green_pwm_led =
|
|
PWM_DT_SPEC_GET(DT_ALIAS(green_pwm_led));
|
|
static const struct pwm_dt_spec blue_pwm_led =
|
|
PWM_DT_SPEC_GET(DT_ALIAS(blue_pwm_led));
|
|
|
|
#define STEP_SIZE PWM_USEC(2000)
|
|
|
|
int main(void)
|
|
{
|
|
uint32_t pulse_red, pulse_green, pulse_blue; /* pulse widths */
|
|
int ret;
|
|
|
|
printk("PWM-based RGB LED control\n");
|
|
|
|
if (!pwm_is_ready_dt(&red_pwm_led) ||
|
|
!pwm_is_ready_dt(&green_pwm_led) ||
|
|
!pwm_is_ready_dt(&blue_pwm_led)) {
|
|
printk("Error: one or more PWM devices not ready\n");
|
|
return 0;
|
|
}
|
|
|
|
while (1) {
|
|
for (pulse_red = 0U; pulse_red <= red_pwm_led.period;
|
|
pulse_red += STEP_SIZE) {
|
|
ret = pwm_set_pulse_dt(&red_pwm_led, pulse_red);
|
|
if (ret != 0) {
|
|
printk("Error %d: red write failed\n", ret);
|
|
return 0;
|
|
}
|
|
|
|
for (pulse_green = 0U;
|
|
pulse_green <= green_pwm_led.period;
|
|
pulse_green += STEP_SIZE) {
|
|
ret = pwm_set_pulse_dt(&green_pwm_led,
|
|
pulse_green);
|
|
if (ret != 0) {
|
|
printk("Error %d: green write failed\n",
|
|
ret);
|
|
return 0;
|
|
}
|
|
|
|
for (pulse_blue = 0U;
|
|
pulse_blue <= blue_pwm_led.period;
|
|
pulse_blue += STEP_SIZE) {
|
|
ret = pwm_set_pulse_dt(&blue_pwm_led,
|
|
pulse_blue);
|
|
if (ret != 0) {
|
|
printk("Error %d: "
|
|
"blue write failed\n",
|
|
ret);
|
|
return 0;
|
|
}
|
|
k_sleep(K_SECONDS(1));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|