diff options
Diffstat (limited to 'firmware/src/main.c')
| -rw-r--r-- | firmware/src/main.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/firmware/src/main.c b/firmware/src/main.c index 7a1076c..1ee66d1 100644 --- a/firmware/src/main.c +++ b/firmware/src/main.c @@ -1,6 +1,46 @@ #include <zephyr/kernel.h> +#include <zephyr/device.h> +#include <zephyr/drivers/gpio.h> + +#define SW0_NODE DT_ALIAS(sw0) +#if !DT_NODE_HAS_STATUS(SW0_NODE, okay) +#error "Unsupported board: Devicetree alias for button is not defined" +#endif +static const struct gpio_dt_spec button = GPIO_DT_SPEC_GET(SW0_NODE, gpios); +static struct gpio_callback button_cb_data; + +void button_pressed(const struct device *dev, struct gpio_callback *cb, + uint32_t pins) +{ + printk("Button pressed\n"); +} int main(void) { + int ret; + + if (!gpio_is_ready_dt(&button)) { + printk("Error: button device %s is not ready\n", + button.port->name); + return 0; + } + + ret = gpio_pin_configure_dt(&button, GPIO_INPUT); + if (ret != 0) { + printk("Error %d: failed to configure %s pin %d\n", + ret, button.port->name, button.pin); + return 0; + } + + ret = gpio_pin_interrupt_configure_dt(&button, GPIO_INT_EDGE_TO_ACTIVE); + if (ret != 0) { + printk("Error %d: failed to configure interrupt on %s pin %d\n", + ret, button.port->name, button.pin); + return 0; + } + + gpio_init_callback(&button_cb_data, button_pressed, BIT(button.pin)); + gpio_add_callback(button.port, &button_cb_data); + return 0; } |