Add a define for the pin number to hello_gpio_irq.c (#612)

...which hopefully makes the code slightly more comprehensible
raspberrypi · Feb 18, 2025 · ad98889 · ad98889
1 parent 7207593
commit ad98889
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/gpio/hello_gpio_irq/hello_gpio_irq.c b/gpio/hello_gpio_irq/hello_gpio_irq.c
@@ -8,6 +8,8 @@
 #include "pico/stdlib.h"
 #include "hardware/gpio.h"
 
+#define GPIO_WATCH_PIN 2
+
 static char event_str[128];
 
 void gpio_event_string(char *buf, uint32_t events);
@@ -23,8 +25,8 @@ int main() {
     stdio_init_all();
 
     printf("Hello GPIO IRQ\n");
-    gpio_init(2);
-    gpio_set_irq_enabled_with_callback(2, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true, &gpio_callback);
+    gpio_init(GPIO_WATCH_PIN);
+    gpio_set_irq_enabled_with_callback(GPIO_WATCH_PIN, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true, &gpio_callback);
 
     // Wait forever
     while (1);
@@ -57,4 +59,4 @@ void gpio_event_string(char *buf, uint32_t events) {
         }
     }
     *buf++ = '\0';
-}
+}