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gen_airframe.ml
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(*
* XML preprocessing for airframe parameters
*
* Copyright (C) 2003-2006 Pascal Brisset, Antoine Drouin
*
* This file is part of paparazzi.
*
* paparazzi is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* paparazzi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with paparazzi; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*)
let max_pprz = 9600. (* !!!! MAX_PPRZ From paparazzi.h !!!! *)
open Printf
open Xml2h
type channel = { min : float; max : float; neutral : float }
type control = { failsafe_value : int; foo : int }
let fos = float_of_string
let sof = fun x -> if mod_float x 1. = 0. then Printf.sprintf "%.0f" x else string_of_float x
let servos_drivers = Hashtbl.create 3
let get_servo_driver = fun servo_name ->
try
Hashtbl.find servos_drivers servo_name
with
Not_found -> failwith (sprintf "gen_airframe, Unknown servo: %s" servo_name)
let get_list_of_drivers = fun () ->
let l = ref [] in
Hashtbl.iter
(fun _s (d, _) -> if not (List.mem d !l) then l := d :: !l)
servos_drivers;
!l
let define_macro name n x =
let a = fun s -> ExtXml.attrib x s in
printf "#define %s(" name;
match n with (* Do we really need more ??? *)
1 -> printf "x1) (%s*(x1))\n" (a "coeff1")
| 2 -> printf "x1,x2) (%s*(x1)+ %s*(x2))\n" (a "coeff1") (a "coeff2")
| 3 -> printf "x1,x2,x3) (%s*(x1)+ %s*(x2)+%s*(x3))\n" (a "coeff1") (a "coeff2") (a "coeff3")
| _ -> failwith "define_macro"
let define_integer name v n =
let max_val = 1 lsl n in
let (v,s) = if v >= 0. then (v, 1) else (-.v, -1) in
let print = fun name num den ->
define (name^"_NUM") (string_of_int num);
define (name^"_DEN") (string_of_int den) in
let rec continious_frac = fun a x num den s ->
let x1 = 1. /. (x -. (float_of_int a)) in
let a1 = truncate x1 in
let (num1, num2) = num in
let num3 = a1 * num2 + num1 in
let (den1, den2) = den in
let den3 = a1 * den2 + den1 in
if num3 > max_val || den3 > max_val then
print name num2 (s*den2)
else if (float_of_int num3) /. (float_of_int den3) = v then
print name num3 (s*den3)
else
continious_frac a1 x1 (num2, num3) (den2, den3) s
in
continious_frac (truncate v) v (1, (truncate v)) (0, 1) s
let convert_value_with_code_unit_coef_of_xml = function xml ->
(* if unit attribute is not specified don't even attempt to convert the units *)
let u = try Xml.attrib xml "unit" with _ -> failwith "Unit conversion error" in
let cu = ExtXml.attrib_or_default xml "code_unit" "" in
(* if unit equals code unit, don't convert as that would always result in a float *)
if u = cu then failwith "Not converting";
(* default value for code_unit is rad[/s] when unit is deg[/s] *)
let conv = try PprzLink.scale_of_units u cu with
| PprzLink.Unit_conversion_error s ->
eprintf "Unit conversion error: %s\n%!" s;
exit 1
| PprzLink.Unknown_conversion (su, scu) ->
eprintf "Warning: unknown unit conversion: from %s to %s\n%!" su scu;
failwith "Unknown unit conversion"
| PprzLink.No_automatic_conversion _ | _ -> failwith "Unit conversion error" in
let v =
try ExtXml.float_attrib xml "value"
with _ -> prerr_endline (sprintf "Error: Unit conversion of parameter %s impossible because '%s' is not a float" (Xml.attrib xml "name") (Xml.attrib xml "value")); flush stderr; exit 1 in
v *. conv
let array_sep = Str.regexp "[,;]"
let rec string_from_type = fun name v t ->
let sprint_array = fun v t ->
let vs = Str.split array_sep v in
let sl = List.map (fun vl -> string_from_type name vl t) vs in
"{ "^(String.concat " , " sl)^" }"
in
let rm_leading_trailing_spaces = fun s ->
let s = Str.global_replace (Str.regexp "^ *") "" s in
Str.global_replace (Str.regexp " *$") "" s
in
match t with
| "float" ->
begin
try
string_of_float (float_of_string (rm_leading_trailing_spaces v))
with _ -> prerr_endline (sprintf "Define value %s = %s is not compatible with type float" name v); flush stderr; exit 1
end
| "int" ->
begin
try
string_of_int (int_of_string (rm_leading_trailing_spaces v))
with _ -> prerr_endline (sprintf "Define value %s = %s is not compatible with type int" name v); flush stderr; exit 1
end
| "string" -> "\""^(rm_leading_trailing_spaces v)^"\""
| "array" -> sprint_array v ""
| "float[]" -> sprint_array v "float"
| "int[]" -> sprint_array v "int"
| "string[]" -> sprint_array v "string"
| _ -> v
let parse_element = fun prefix s ->
match Xml.tag s with
"define" -> begin
try
(* fail if units conversion is not found and just copy value instead,
this is important for integer values, you can't just multiply them with 1.0 *)
let value =
try string_of_float (convert_value_with_code_unit_coef_of_xml s)
with _ -> ExtXml.display_entities (ExtXml.attrib s "value")
in
let name = (prefix^ExtXml.attrib s "name") in
let t = ExtXml.attrib_or_default s "type" "" in
define name (string_from_type name value t);
define_integer name (ExtXml.float_attrib s "value") (ExtXml.int_attrib s "integer");
with _ -> ();
end
| "linear" ->
let name = ExtXml.attrib s "name"
and n = int_of_string (ExtXml.attrib s "arity") in
define_macro (prefix^name) n s
| _ -> xml_error "define|linear"
let parse_servo = fun driver c ->
let shortname = ExtXml.attrib c "name" in
let name = "SERVO_"^shortname
and no_servo = int_of_string (ExtXml.attrib c "no") in
define name (string_of_int no_servo);
let min = fos (ExtXml.attrib c "min" )
and neutral = fos (ExtXml.attrib c "neutral")
and max = fos (ExtXml.attrib c "max" ) in
let travel_up = (max-.neutral) /. max_pprz
and travel_down = (neutral-.min) /. max_pprz in
define (name^"_NEUTRAL") (sof neutral);
define (name^"_TRAVEL_UP") (sof travel_up);
define_integer (name^"_TRAVEL_UP") travel_up 16;
define (name^"_TRAVEL_DOWN") (sof travel_down);
define_integer (name^"_TRAVEL_DOWN") travel_down 16;
let min = Pervasives.min min max
and max = Pervasives.max min max in
define (name^"_MAX") (sof max);
define (name^"_MIN") (sof min);
nl ();
(* Memorize the associated driver (if any) and global index (insertion order) *)
let global_idx = Hashtbl.length servos_drivers in
Hashtbl.add servos_drivers shortname (driver, global_idx)
(* Characters checked in Gen_radio.checl_function_name *)
let pprz_value = Str.regexp "@\\([A-Z_0-9]+\\)"
let var_value = Str.regexp "\\$\\([_a-z0-9]+\\)"
let preprocess_value = fun s v prefix ->
let s = Str.global_replace pprz_value (sprintf "%s[%s_\\1]" v prefix) s in
Str.global_replace var_value "_var_\\1" s
let print_actuators_idx = fun () ->
Hashtbl.iter (fun s (d, i) ->
printf "#define SERVO_%s_IDX %d\n" s i;
(* Set servo macro *)
printf "#define Set_%s_Servo(_v) { \\\n" s;
printf " actuators[SERVO_%s_IDX] = Chop(_v, SERVO_%s_MIN, SERVO_%s_MAX); \\\n" s s s;
printf " Actuator%sSet(SERVO_%s, actuators[SERVO_%s_IDX]); \\\n" d s s;
printf "}\n\n"
) servos_drivers;
define "ACTUATORS_NB" (string_of_int (Hashtbl.length servos_drivers));
nl ()
let parse_command_laws = fun command ->
let a = fun s -> ExtXml.attrib command s in
match Xml.tag command with
"set" ->
let servo = a "servo"
and value = a "value" in
let v = preprocess_value value "values" "COMMAND" in
printf " command_value = %s; \\\n" v;
printf " command_value *= command_value>0 ? SERVO_%s_TRAVEL_UP_NUM : SERVO_%s_TRAVEL_DOWN_NUM; \\\n" servo servo;
printf " command_value /= command_value>0 ? SERVO_%s_TRAVEL_UP_DEN : SERVO_%s_TRAVEL_DOWN_DEN; \\\n" servo servo;
printf " servo_value = SERVO_%s_NEUTRAL + command_value; \\\n" servo;
printf " Set_%s_Servo(servo_value); \\\n\\\n" servo
| "let" ->
let var = a "var"
and value = a "value" in
let v = preprocess_value value "values" "COMMAND" in
printf " int16_t _var_%s = %s; \\\n" var v
| "call" ->
let f = a "fun" in
printf " %s; \\\n\\\n" f
| "ratelimit" ->
let var = a "var"
and value = a "value"
and rate_min = a "rate_min"
and rate_max = a "rate_max" in
let v = preprocess_value value "values" "COMMAND" in
printf " static int16_t _var_%s = 0; _var_%s += Chop((%s) - (_var_%s), (%s), (%s)); \\\n" var var v var rate_min rate_max
| "define" ->
parse_element "" command
| _ -> xml_error "set|let"
let parse_rc_commands = fun rc ->
let a = fun s -> ExtXml.attrib rc s in
match Xml.tag rc with
"set" ->
let com = a "command"
and value = a "value" in
let v = preprocess_value value "_rc_array" "RADIO" in
printf " _commands_array[COMMAND_%s] = %s;\\\n" com v;
| "let" ->
let var = a "var"
and value = a "value" in
let v = preprocess_value value "rc_values" "RADIO" in
printf " int16_t _var_%s = %s;\\\n" var v
| "define" ->
parse_element "" rc
| _ -> xml_error "set|let"
let parse_ap_only_commands = fun ap_only ->
let a = fun s -> ExtXml.attrib ap_only s in
match Xml.tag ap_only with
"copy" ->
let com = a "command" in
printf " commands[COMMAND_%s] = ap_commands[COMMAND_%s];\\\n" com com
| _ -> xml_error "copy"
let parse_command = fun command no ->
let command_name = "COMMAND_"^ExtXml.attrib command "name" in
define command_name (string_of_int no);
let failsafe_value = int_of_string (ExtXml.attrib command "failsafe_value") in
{ failsafe_value = failsafe_value; foo = 0}
let parse_heli_curves = fun heli_surves ->
let a = fun s -> ExtXml.attrib heli_surves s in
match Xml.tag heli_surves with
"curve" ->
let throttle = a "throttle" in
let collective = a "collective" in
printf " {.nb_points = %i, \\\n" (List.length (Str.split (Str.regexp ",") throttle));
printf " .throttle = {%s}, \\\n" throttle;
printf " .collective = {%s}}, \\\n" collective
| _ -> xml_error "mixer"
let rec parse_section = fun ac_id s ->
match Xml.tag s with
"section" ->
let prefix = ExtXml.attrib_or_default s "prefix" "" in
define ("SECTION_"^ExtXml.attrib s "name") "1";
List.iter (parse_element prefix) (Xml.children s);
nl ()
| "servos" ->
let driver = ExtXml.attrib_or_default s "driver" "Default" in
let servos = Xml.children s in
let nb_servos = List.fold_right (fun s m -> Pervasives.max (int_of_string (ExtXml.attrib s "no")) m) servos min_int + 1 in
define (sprintf "SERVOS_%s_NB" (String.uppercase driver)) (string_of_int nb_servos);
printf "#include \"subsystems/actuators/actuators_%s.h\"\n" (String.lowercase driver);
nl ();
List.iter (parse_servo driver) servos;
nl ()
| "commands" ->
let commands = Array.of_list (Xml.children s) in
let commands_params = Array.mapi (fun i c -> parse_command c i) commands in
define "COMMANDS_NB" (string_of_int (Array.length commands));
define "COMMANDS_FAILSAFE" (sprint_float_array (List.map (fun x -> string_of_int x.failsafe_value) (Array.to_list commands_params)));
nl (); nl ()
| "rc_commands" ->
printf "#define SetCommandsFromRC(_commands_array, _rc_array) { \\\n";
List.iter parse_rc_commands (Xml.children s);
printf "}\n\n"
| "auto_rc_commands" ->
printf "#define SetAutoCommandsFromRC(_commands_array, _rc_array) { \\\n";
List.iter parse_rc_commands (Xml.children s);
printf "}\n\n"
| "ap_only_commands" ->
printf "#define SetApOnlyCommands(ap_commands) { \\\n";
List.iter parse_ap_only_commands (Xml.children s);
printf "}\n\n"
| "command_laws" ->
(* print actuators index and set macros *)
print_actuators_idx ();
(* print init and commit actuators macros *)
let drivers = get_list_of_drivers () in
printf "#define AllActuatorsInit() { \\\n";
List.iter (fun d -> printf " Actuators%sInit();\\\n" d) drivers;
printf "}\n\n";
printf "#define AllActuatorsCommit() { \\\n";
List.iter (fun d -> printf " Actuators%sCommit();\\\n" d) drivers;
printf "}\n\n";
(* print actuators from commands macro *)
printf "#define SetActuatorsFromCommands(values, AP_MODE) { \\\n";
printf " int32_t servo_value;\\\n";
printf " int32_t command_value;\\\n\\\n";
List.iter parse_command_laws (Xml.children s);
printf " AllActuatorsCommit(); \\\n";
printf "}\n\n";
| "heli_curves" ->
let default = ExtXml.attrib_or_default s "default" "0" in
let curves = Xml.children s in
let nb_points = List.fold_right (fun s m -> Pervasives.max (List.length (Str.split (Str.regexp ",") (ExtXml.attrib s "throttle"))) m) curves 0 in
define "THROTTLE_CURVE_MODE_INIT" default;
define "THROTTLE_CURVES_NB" (string_of_int (List.length curves));
define "THROTTLE_POINTS_NB" (string_of_int nb_points);
printf "#define THROTTLE_CURVES { \\\n";
List.iter parse_heli_curves curves;
printf "}\n\n";
| "include" ->
let filename = Str.global_replace (Str.regexp "\\$AC_ID") ac_id (ExtXml.attrib s "href") in
let subxml = ExtXml.parse_file filename in
printf "/* XML %s */" filename;
nl ();
List.iter (parse_section ac_id) (Xml.children subxml)
| "makefile" ->
()
(** Ignoring this section *)
| _ -> ()
let h_name = "AIRFRAME_H"
let hex_to_bin = fun s ->
let n = String.length s in
assert(n mod 2 = 0);
let b = String.make (2*n) 'x' in
for i = 0 to n/2 - 1 do
b.[4*i] <- '\\';
Scanf.sscanf (String.sub s (2*i) 2) "%2x"
(fun x ->
String.blit (sprintf "%03o" x) 0 b (4*i+1) 3)
done;
b
let _ =
if Array.length Sys.argv <> 5 then
failwith (Printf.sprintf "Usage: %s A/C_ident A/C_name MD5SUM xml_file" Sys.argv.(0));
let xml_file = Sys.argv.(4)
and ac_id = Sys.argv.(1)
and ac_name = Sys.argv.(2)
and md5sum = Sys.argv.(3) in
try
let xml = start_and_begin xml_file h_name in
(* Xml2h.warning ("AIRFRAME MODEL: "^ ac_name); *)
define_string "AIRFRAME_NAME" ac_name;
define "AC_ID" ac_id;
define "MD5SUM" (sprintf "((uint8_t*)\"%s\")" (hex_to_bin md5sum));
nl ();
List.iter (parse_section ac_id) (Xml.children xml);
finish h_name
with
Xml.Error e -> fprintf stderr "%s: XML error:%s\n" xml_file (Xml.error e); exit 1
| Dtd.Prove_error e -> fprintf stderr "%s: DTD error:%s\n%!" xml_file (Dtd.prove_error e); exit 1
| Dtd.Check_error e -> fprintf stderr "%s: DTD error:%s\n%!" xml_file (Dtd.check_error e); exit 1
| Dtd.Parse_error e -> fprintf stderr "%s: DTD error:%s\n%!" xml_file (Dtd.parse_error e); exit 1