Hello.
I have a light sensor connected to 2 gpio pins on nrf5340, Enable Pin : P0.08 and Output Pin: P0.07
Trying to trigger an interrupt based on the light.
With the button example, I am able to trigger the interrupt correctly based on button press, just used that as reference and trying to trigger interrupt based on pin sense mechanism.
C code:
#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>
#include <zephyr/irq.h>
#include <hal/nrf_gpio.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/device.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(test_sense_gpiote, LOG_LEVEL_DBG); // Register a module for your logs
static const struct gpio_dt_spec phswout = GPIO_DT_SPEC_GET_BY_IDX_OR(DT_NODELABEL(user_dbg_pin), gpios, 0, {0});
static const struct gpio_dt_spec phswen = GPIO_DT_SPEC_GET_BY_IDX_OR(DT_NODELABEL(user_gbd_pin), gpios, 0, {0});
void button_pressed(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
{
LOG_DBG("Wake up\n");
LOG_DBG("Set up LED at %s pin %d\n", phswout.port->name, phswout.pin);
}
static struct gpio_callback button_cb_data;
int light_sleep_example(void)
{
int ret;
static bool flag_x = true;
if(!device_is_ready(phswout.port))
{
LOG_DBG("PH SW OUT device not ready");
return;
}
if(!device_is_ready(phswen.port))
{
LOG_DBG("PH SW EN device not ready");
return;
}
LOG_DBG("Before interrrupt call");
LOG_DBG("State of phswout output %d", nrf_gpio_pin_read(phswout.pin));
nrf_gpio_cfg_output(phswout.pin);
nrf_gpio_pin_clear(phswout.pin); // this drives to 1
LOG_DBG("State of phswout output %d", nrf_gpio_pin_read(phswout.pin));
nrf_gpio_cfg_sense_input(phswout.pin, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_HIGH);
LOG_DBG("Sense output state %d", nrf_gpio_pin_sense_get(phswout.pin)); // show pin sense as low.
ret = gpio_pin_interrupt_configure_dt(&phswout, GPIO_INT_EDGE_TO_ACTIVE);
gpio_init_callback(&button_cb_data, button_pressed, BIT(phswout.pin));
gpio_add_callback(phswout.port, &button_cb_data);
nrf_gpio_cfg_sense_input(phswout.pin, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_HIGH); // with this interrupt is getting triggered immediately
LOG_DBG("Sense output state %d", nrf_gpio_pin_sense_get(phswout.pin)); // shows pin sense as low only.
LOG_DBG("After Interrupt call");
if(flag_x)
{
LOG_DBG("WFI");
k_sleep(K_SECONDS(1));
__WFI();
//Ideally I'd expect it to wait here until I remove the sticker from the light sensor. But the interrupt fires immediately.
k_sleep(K_SECONDS(1));
flag_x = false;
}
return 0;
}Overlay File:
/ {
user_dbg_pin: user-dbg-pin {
compatible = "nordic,gpio-pins";
gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
status = "okay";
};
};
/ {
user_gbd_pin: user-gbd-pin {
compatible = "nordic,gpio-pins";
gpios = <&gpio0 8 GPIO_ACTIVE_HIGH>;
status = "okay";
};
};Misc Details:
NRF SDK 2.7.0
Zephyr 3.6.99
NRF5340dk
Any inputs or directions on where I am going wrong?
