Generate iio events

dev_iio.h

@@ -0,0 +1,71 @@
+#pragma once
+
+#include "rogue_enemy.h"
+
+#define DEV_IIO_HAS_ACCEL   0x00000001U
+#define DEV_IIO_HAS_ANGLVEL 0x00000002U
+
+#define ACCEL_SCALE     ((double)(255.0)/(double)(9.81)) // convert m/s^2 to g's, and scale x255 to increase precision when passed to evdev as an int
+#define GYRO_SCALE      ((double)(180.0)/(double)(M_PI))  // convert radians/s to degrees/s
+
+typedef struct dev_iio {
+    char* path;
+    char* name;
+    uint32_t flags;
+
+    char* accel_scale_x_fd;
+    char* accel_scale_y_fd;
+    char* accel_scale_z_fd;
+
+    int accel_x;
+    int accel_y;
+    int accel_z;
+
+    double accel_scale_x;
+    double accel_scale_y;
+    double accel_scale_z;
+
+    char* anglvel_scale_x_fd;
+    char* anglvel_scale_y_fd;
+    char* anglvel_scale_z_fd;
+
+    double outer_accel_scale_x;
+    double outer_accel_scale_y;
+    double outer_accel_scale_z;
+
+    int anglvel_x;
+    int anglvel_y;
+    int anglvel_z;
+
+    double anglvel_scale_x;
+    double anglvel_scale_y;
+    double anglvel_scale_z;
+
+    double outer_anglvel_scale_x;
+    double outer_anglvel_scale_y;
+    double outer_anglvel_scale_z;
+
+} dev_iio_t;
+
+dev_iio_t* dev_iio_create(const char* path);
+
+void dev_iio_destroy(dev_iio_t* iio);
+
+const char* dev_iio_get_name(const dev_iio_t* iio);
+
+const char* dev_iio_get_path(const dev_iio_t* iio);
+
+inline int dev_iio_has_anglvel(const dev_iio_t* iio) {
+    return (iio->flags & DEV_IIO_HAS_ANGLVEL) != 0;
+}
+
+inline int dev_iio_has_accel(const dev_iio_t* iio) {
+    return (iio->flags & DEV_IIO_HAS_ACCEL) != 0;
+}
+
+int dev_iio_read(
+    const dev_iio_t *const iio,
+    struct input_event *const buf,
+    size_t buf_sz,
+    uint32_t *const buf_out
+);