feat(MP/daemon): add logic file and sysfs

src/06-mini-project/daemon/logic/app.c

@@ -0,0 +1 @@
+#include "app.h"

src/06-mini-project/daemon/logic/app.h

@@ -0,0 +1,25 @@
+#ifndef APP_H
+#define APP_H
+
+#include "../gpio/led.h"
+
+#define DEFAULT_PERIOD_MS 1000
+
+void set_led(
+
+void increase_period();
+void decrease_period();
+void set_period(int period_ms);
+
+void mode_toggle();
+void set_mode(int mode);
+
+float get_temperature();
+
+
+/*  Button specific function */
+
+void btn_increase_period();
+void btn_decrease_period();
+
+#endif /* APP_H */

src/06-mini-project/daemon/logic/sysfs.c

@@ -0,0 +1,66 @@
+#include "sysfs.h"
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+float get_temperature() {
+    FILE *f = fopen(PATH_TEMPERATURE, "r");
+    if (f == NULL) {
+        return 0.0f; /* Return 0.0 if the kernel module is not loaded */
+    }
+
+    float temp = 0.0f;
+
+    /*
+    * The kernel formats the temperature as "XX.YYY" (e.g., "41.730").
+    * Since we are in user space, we can simply read it as a float.
+    */
+    if (fscanf(f, "%f", &temp) == 1) {
+        fclose(f);
+        return temp;
+    }
+
+    fclose(f);
+    return 0.0f;
+}
+
+uint32_t get_mode() {
+    FILE *f = fopen(PATH_MODE, "r");
+    if (f == NULL) return 0;
+
+    uint32_t mode = 0;
+    fscanf(f, "%u", &mode);
+    fclose(f);
+
+    return mode;
+}
+
+void set_mode(uint32_t mode) {
+    FILE *f = fopen(PATH_MODE, "w");
+    if (f == NULL) return;
+
+    /* Write the integer as an ASCII string */
+    fprintf(f, "%u\n", mode);
+    fclose(f);
+}
+
+uint32_t get_period() {
+    FILE *f = fopen(PATH_PERIOD_ST, "r");
+    if (f == NULL) return 0;
+
+    uint32_t period = 0;
+    fscanf(f, "%u", &period);
+    fclose(f);
+
+    return period;
+}
+
+void set_period(uint32_t period) {
+    FILE *f = fopen(PATH_PERIOD_SET, "w");
+    if (f == NULL) return;
+
+    fprintf(f, "%u\n", period);
+    fclose(f);
+}

src/06-mini-project/daemon/logic/sysfs.h

@@ -0,0 +1,20 @@
+#ifndef SYSFS_H
+#define SYSFS_H
+
+#include <stdint.h>
+
+/* Define the absolute paths to the sysfs files created by the kernel */
+#define SYSFS_BASE_PATH  "/sys/class/temp_regulator/regulator"
+#define PATH_TEMPERATURE SYSFS_BASE_PATH "/temperature"
+#define PATH_MODE        SYSFS_BASE_PATH "/mode"
+#define PATH_PERIOD_ST   SYSFS_BASE_PATH "/period_status"
+#define PATH_PERIOD_SET  SYSFS_BASE_PATH "/period_set"
+
+float get_temperature();
+uint32_t get_mode();
+void set_mode(uint32_t mode);
+uint32_t get_period();
+void set_period(uint32_t period);
+
+
+#endif /* SYSFS_H */