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gen_airframe.ml
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gen_airframe.ml
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(*
* $Id$
*
* 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 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 ->
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 den2
else if (float_of_int num3) /. (float_of_int den3) = v then
print name num3 den3
else
continious_frac a1 x1 (num2, num3) (den2, den3)
in
continious_frac (truncate v) v (1, (truncate v)) (0, 1)
let parse_element = fun prefix s ->
match Xml.tag s with
"define" -> begin
try
define (prefix^ExtXml.attrib s "name") (ExtXml.display_entities (ExtXml.attrib s "value"));
define_integer (prefix^(ExtXml.attrib s "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 (name^"_TRAVEL_DOWN") (sof travel_down);
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) *)
Hashtbl.add servos_drivers shortname driver
(* 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 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 : SERVO_%s_TRAVEL_DOWN;\\\n" servo servo;
printf " servo_value = SERVO_%s_NEUTRAL + (int32_t)(command_value);\\\n" servo;
printf " actuators[SERVO_%s] = ChopServo(servo_value, SERVO_%s_MIN, SERVO_%s_MAX);\\\n\\\n" servo servo servo;
let driver = get_servo_driver servo in
printf " Actuator%s(SERVO_%s) = SERVOS_TICS_OF_USEC(actuators[SERVO_%s]);\\\n\\\n" driver servo 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
| "define" ->
parse_element "" command
| _ -> xml_error "set|let"
let parse_csc_fields = fun csc_fields ->
let a = fun s -> ExtXml.attrib csc_fields s in
match Xml.tag csc_fields with
"field_map" ->
let servo_id = a "servo_id"
and field = a "field" in
printf " temp.%s = actuators[%s]; \\\n" field servo_id;
| _ -> xml_error "field_map"
let parse_csc_messages = (let msg_index_ref = ref 0 in fun csc_id csc_messages ->
let a = fun s -> ExtXml.attrib csc_messages s in
match Xml.tag csc_messages with
"msg" ->
let msg_id = a "id"
and msg_type = a "type"
and msg_index = msg_index_ref.contents in
msg_index_ref.contents <- msg_index + 1;
printf "{\\\n struct Csc%s temp; \\\n" msg_type;
List.iter parse_csc_fields (Xml.children csc_messages);
printf " can_write_csc(%s, CSC_%s, (uint8_t *)&temp, sizeof(struct Csc%s)); \\\n" csc_id msg_id msg_type;
printf "} \\\n"
| _ -> xml_error "msg"
)
let parse_csc_boards = fun csc_board ->
let a = fun s -> ExtXml.attrib csc_board s in
match Xml.tag csc_board with
"board" ->
let csc_id = a "id" in
List.iter (parse_csc_messages csc_id) (Xml.children csc_board);
| "define" ->
parse_element "" csc_board
| _ -> xml_error "board"
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 rec parse_section = fun 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" "" 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 "SERVOS_NB" (string_of_int nb_servos);
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" ->
printf "#define SetActuatorsFromCommands(values) { \\\n";
printf " uint32_t servo_value;\\\n";
printf " float command_value;\\\n";
List.iter parse_command_laws (Xml.children s);
let drivers = get_list_of_drivers () in
List.iter (fun d -> printf " Actuators%sCommit();\\\n" d) drivers;
printf "}\n\n";
printf "#define AllActuatorsInit() { \\\n";
List.iter (fun d -> printf " Actuators%sInit();\\\n" d) drivers;
printf "}\n\n";
| "csc_boards" ->
let boards = Array.of_list (Xml.children s) in
define "CSC_BOARD_NB" (string_of_int (Array.length boards));
printf "#define SendCscFromActuators() { \\\n";
List.iter parse_csc_boards (Xml.children s);
printf "}\n"
| "include" ->
let filename = ExtXml.attrib s "href" in
let subxml = Xml.parse_file filename in
printf "/* XML %s */" filename;
nl ();
List.iter parse_section (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 (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