Add grid specification types to documents

Author: AmirhosseinPoolad

doc/src/api/vpr/grid.rst

@@ -7,4 +7,19 @@ DeviceGrid
 
 .. doxygenclass:: DeviceGrid
    :project: vpr
-   :members:
+   :members:
+
+-------
+Grid Specification Types
+-------
+
+These types are used to capture user's intended architecture specification and will be later turned into a flattened device grid according to the device's size.
+
+.. doxygenstruct:: t_grid_loc_spec
+   :project: vpr
+   :members:
+
+.. doxygenstruct:: t_grid_loc_def
+   :project: vpr
+   :members:
+   

libs/libarchfpga/src/grid_types.h

@@ -13,8 +13,7 @@
 struct t_metadata_dict;
 
 /**
- * @brief Grid location specification, used to capture user's intended architecture specification.
- * will be later turned into a flattened device grid according to the device's size.
+ * @brief Grid location specification
  * Each member is a formula evaluated in terms of 'W' (device width),
  * and 'H' (device height). Formulas can be evaluated using parse_formula()
  * from expr_eval.h.