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doc(lab02): add doc for ex08

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Klagarge committed 2026-04-01 18:42:18 +02:00
1 parent 906954a035
commit 7a376ff789
2 files changed
+29 -22
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src/01-skeleton/s02e08-interrupt.c
+16 -19
View File
@@ -6,17 +6,14 @@
#include <linux/gpio.h>
#include "linux/printk.h"
#define SWITCH_K1 0
#define SWITCH_K2 2
#define SWITCH_K3 3
struct gpio_nanopi {
int pin;
int id;
char* name;
};
static struct gpio_nanopi switchK1 = {0, "K1: GPIOA.0"};
static struct gpio_nanopi switchK2 = {0, "K2: GPIOA.2"};
static struct gpio_nanopi switchK3 = {0, "K3: GPIOA.3"};
static struct gpio_nanopi switchK2 = {2, "K2: GPIOA.2"};
static struct gpio_nanopi switchK3 = {3, "K3: GPIOA.3"};
irqreturn_t isrGPIO(int irq, void* gpio_struct) {
struct gpio_nanopi *gpio = (struct gpio_nanopi *)gpio_struct;
@@ -31,9 +28,9 @@ void interrupt_init(void) {
int status = 0;
// Switch k1
if (gpio_request(SWITCH_K1, switchK1.name) == 0) {
if (gpio_request(switchK1.id, switchK1.name) == 0) {
status = request_irq(
gpio_to_irq(SWITCH_K1),
gpio_to_irq(switchK1.id),
isrGPIO,
IRQF_TRIGGER_FALLING | IRQF_SHARED,
switchK1.name,
@@ -42,9 +39,9 @@ void interrupt_init(void) {
}
// Switch k2
if (gpio_request(SWITCH_K2, switchK2.name) == 0) {
if (gpio_request(switchK2.id, switchK2.name) == 0) {
status = request_irq(
gpio_to_irq(SWITCH_K2),
gpio_to_irq(switchK2.id),
isrGPIO,
IRQF_TRIGGER_FALLING | IRQF_SHARED,
switchK2.name,
@@ -53,9 +50,9 @@ void interrupt_init(void) {
}
// Switch k3
if (gpio_request(SWITCH_K3, switchK3.name) == 0) {
if (gpio_request(switchK3.id, switchK3.name) == 0) {
status = request_irq(
gpio_to_irq(SWITCH_K3),
gpio_to_irq(switchK3.id),
isrGPIO,
IRQF_TRIGGER_FALLING | IRQF_SHARED,
switchK3.name,
@@ -69,14 +66,14 @@ void interrupt_init(void) {
void interrupt_exit(void) {
pr_info("Exiting interrupts\n");
gpio_free(SWITCH_K1);
free_irq(gpio_to_irq(SWITCH_K1), &switchK1);
gpio_free(switchK1.id);
free_irq(gpio_to_irq(switchK1.id), &switchK1);
gpio_free(SWITCH_K2);
free_irq(gpio_to_irq(SWITCH_K2), &switchK2);
gpio_free(switchK2.id);
free_irq(gpio_to_irq(switchK2.id), &switchK2);
gpio_free(SWITCH_K3);
free_irq(gpio_to_irq(SWITCH_K3), &switchK3);
gpio_free(switchK3.id);
free_irq(gpio_to_irq(switchK3.id), &switchK3);
pr_info ("Interrupt exited\n");