1 files changed, 50 insertions, 3 deletions
diff --git a/app.h b/app.h
index e892a42..eaf6465 100644
--- a/app.h
+++ b/app.h
@@ -3,10 +3,57 @@
 
 #include <stdint.h>
 
-#define FSP_CMD_GAUGE_COUNT 1
-#define FSP_CMD_GAUGE_INFO 2
+enum fsp_cmd_code {
+  FSP_CMD_GET_GAUGE_COUNT = 1,
+  FSP_CMD_SET_GAUGE       = 2,
+  FSP_CMD_GET_GAUGE       = 3,
+  FSP_CMD_FAIL            = 255,
+};
 
-bool send_ctrl(uint8_t *data, uint8_t len);
+struct fsp_get_gauge_count_req {
+};
+
+struct fsp_get_gauge_count_res {
+  uint8_t count;
+};
+
+struct fsp_set_gauge_req {
+  uint8_t gauge;
+  uint8_t value;
+};
+
+struct fsp_set_gauge_res {
+};
+
+struct fsp_get_gauge_req {
+  uint8_t gauge;
+};
+
+struct fsp_get_gauge_res {
+  uint8_t gauge;
+  uint8_t value;
+};
+
+struct fsp_req {
+  uint8_t code;
+  union {
+    struct fsp_get_gauge_count_req get_gauge_count;
+    struct fsp_get_gauge_req get_gauge;
+    struct fsp_set_gauge_req set_gauge;
+  };
+};
+
+struct fsp_res {
+  uint8_t len;
+  uint8_t code;
+  union {
+    struct fsp_get_gauge_count_res get_gauge_count;
+    struct fsp_get_gauge_res get_gauge;
+    struct fsp_set_gauge_res set_gauge;
+  };
+};
+
+bool send_ctrl(struct fsp_res *res);
 
 void on_gauge_data(uint8_t *data, uint8_t len);
 void on_gauge_ctrl(uint8_t *data, uint8_t len);