Hi, I am following the tutorial and have some questions during the implementation.
devzone.nordicsemi.com/.../nrf-connect-sdk-tutorial---part-2-ncs-v1-4-0
A red led increasing its intensity but every 2 cycles the blue led suddenly lights up.
I have erased the whole flash but nothing changed.
And I have connected the serial terminal to see if the board is reset. But "PWM Application has started!" only shows once.
Any suggestions are welcome.
thingy91_nrf9160ns.overlay
&pwm0 {
status = "okay";
ch0-pin = <29>;
};
main.c
#include <zephyr.h>
#include <device.h>
#include <stdio.h>
#include <sys/printk.h>
#include <sys/util.h>
#include <sys_clock.h>
#include <drivers/pwm.h>
#include <kernel.h>
#include <logging/log.h>
LOG_MODULE_REGISTER(modules_common, 4);
#define PWM_DEVICE_NAME DT_PROP(DT_NODELABEL(pwm0), label)
#define PWM_CH0_PIN DT_PROP(DT_NODELABEL(pwm0), ch0_pin)
#define PWM_CH1_PIN DT_PROP(DT_NODELABEL(pwm0), ch1_pin)
#define PWM_CH2_PIN DT_PROP(DT_NODELABEL(pwm0), ch2_pin)
#define PWM_PERIOD 253
static const struct device* pwm_init()
{
const struct device *pwm_dev = device_get_binding(PWM_DEVICE_NAME);
if (pwm_dev == NULL) {
printk("Didn't find LED device %s\n", PWM_DEVICE_NAME);
return NULL;
}
return pwm_dev;
}
void main(void)
{
printk("PWM Application has started!\r\n");
const struct device *pwm_dev = pwm_init();
if (pwm_dev == NULL) return;
uint8_t pulse = 0;
while (1) {
pulse = pulse +10;
if (pulse > PWM_PERIOD) {
pulse = 0;
}
if (pwm_pin_set_usec(pwm_dev, PWM_CH0_PIN, PWM_PERIOD, pulse, 0)) {
printk(".");
}
//if (pwm_pin_set_usec(pwm_dev, PWM_CH1_PIN, PWM_PERIOD, pulse, 0)) {
// printk(".");
//}
k_sleep(K_MSEC(200));
}
}
Environment:
- nRF Connect SDK 1.5.1 installed by Toolchain manager
- Thingy:91 and JLink debugger
