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0.0
===
Primera versión compilable de la librería.
Aún queda pendiente la implementación de la ejecución de las instrucciones, y revisar todo la librería para quitar elementos no usados ya que esta libraría se ha creado a partir de la librería PicUtils.

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END OF TERMS AND CONDITIONS
@ -287,15 +628,15 @@ free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
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@ -303,37 +644,32 @@ the "copyright" line and a pointer to where the full notice is found.
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Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
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659
PicCore.pas Normal file
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@ -0,0 +1,659 @@
{PICCore
Contains basic definitions applicable to all PIC microcontroller Cores
Created by Tito Hinostroza 28/04/2018
}
unit PicCore;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, LCLProc;
const
PIC_MAX_PINES = 64; //Max. number of pines for the package
type
//Union to access bytes of a word
TWordRec = record
case byte of
1 : (W : Word);
{$IFDEF ENDIAN_LITTLE}
2 : (L, H: Byte);
{$ELSE}
2 : (H, L: Byte);
{$ENDIF}
end;
TPICCellState = (
cs_impleGPR, //Implemented. Can be used.
cs_unimplem //Not implemented.
);
TPICPinType = (
pptVcc, //Alimentación
pptGND, //Tierra
pptControl,//Pin de control
pptPort, //Puerto Entrada/Salida
pptUnused //Pin no usado
);
{ TPICPin }
//Model for a phisycal pin of the PIC
TPICPin = object
nam: string; //Eqtiueta o nombre
typ: TPICPinType; //Tipo de pin
add: word; //Dirección en RAM
bit: byte; //Bit en RAM
function GetLabel: string;
end;
TPICPinPtr = ^TPICPin;
type //Models for RAM memory
{ TPICRamCell }
{Modela a una dirección lógica de la memoria RAM. Se ha taratdo de hacer una
definición eficiente de esta estructura para facilitar la implementación de
simuladores en tiempo real. Podemos usar un tamaño mediano para este registro,
porque no esperamos tener muchas celdas de RAM (<1K).}
TPICRamCellPtr = ^TPICRamCell;
TPICRamCell = object
private
Fvalue : byte; //value of the memory
function Getvalue: byte;
procedure Setvalue(AValue: byte);
public
addr : word; //dirección física de memoria, en donde está la celda.
name : string; //Name of the register (or variable)
used : boolean; //Indicates if have been written
shared : boolean; //Used to share this register
state : TPICCellState; //Status of the cell
property value: byte read Getvalue write Setvalue;
property dvalue: byte read Fvalue write Fvalue; //Direct access to "Fvalue".
function AvailGPR: boolean;
public //Campos para deputación
breakPnt : boolean; //Indicates if this cell have a Breakpoint
{Be careful on the size of this record, because it's going to be multiplied by 64K}
public //Information of position in source code. Used for debug
rowSrc : word; //Row number
colSrc : word; //Column number
idFile : SmallInt; //Index to a file. No load the name to save space.
{Estos campos de cadena ocupan bastante espacio, aún cuado están en NULL. Si se
quisiera optimizar el uso de RAM, se podría pensar en codificar, varios campos en
una sola cadena.}
topLabel : string; //Label on the top of the cell.
topComment : string; //Comment on the top of the cell.
sideComment: string; //Right comment to code
end;
TPICRam = array of TPICRamCell;
TPICRamPtr = ^TPICRam;
TPICRutExplorRAM = procedure(offs, bnk: byte; regPtr: TPICRamCellPtr) of object;
type //Models for Flash memory
TPICFlashCell = record
value : word; //Value of the memory (OpCode)
end;
type
{ TPicCore }
{Abcestor of all 8 bits PIC cores}
TPicCore = class
private
FMaxFlash: integer;
procedure SetMaxFlash(AValue: integer);
public //Limits
{This variables are set just one time. So they work as constant.}
PICBANKSIZE : word;
PICMAXRAM : word;
PICPAGESIZE : word;
PICMAXFLASH : word;
public //General fields
Model : string; //modelo de PIC
frequen : integer; //frecuencia del reloj
MaxFreq : integer; //máxima frecuencia del reloj
//Propiedades que definen la arquitectura del PIC destino.
NumBanks: byte; //Número de bancos de RAM.
NumPages: byte; //Número de páginas de memoria Flash.
MsjError: string;
{Maximun numbers of Flash cells implemented (Generally used when the first Flash
page is partially implemented). Applicable only when it's greater than zero}
property MaxFlash: integer read FMaxFlash write SetMaxFlash;
public //Execution control
nClck : Int64; //Contador de ciclos de reloj
CommStop: boolean; //Bandera para detener la ejecución
OnExecutionMsg: procedure(message: string) of object; //Genera mensaje en ejecución
protected //Generation of HEX files
minUsed : word; //Dirección menor de la ROM usada
maxUsed : word; //Dirección mayor de la ROM usdas
hexLines : TStringList; //Uusado para crear archivo *.hex
function HexChecksum(const lin: string): string;
procedure GenHexComm(comment: string);
procedure GenHexExAdd(Data: word);
procedure GenHexData(Address: word; Data: string);
procedure GenHexEOF;
function StrHexFlash(i1, i2: integer): string;
public //Memories
ram : TPICRam; //memoria RAM
iRam : integer; //puntero a la memoria RAM, para escribir cuando se ensambla o compila código.
function DisassemblerAt(addr: word; out nBytesProc: byte; useVarName: boolean
): string; virtual; abstract; //Desensambla la instrucción actual
public //RAM memory functions
procedure ClearMemRAM;
procedure DisableAllRAM;
procedure SetStatRAM(i1, i2: word; status0: TPICCellState);
function SetStatRAMCom(strDef: string): boolean;
function MapRAMtoPIN(strDef: string): boolean;
function HaveConsecRAM(const i, n: word; maxRam: word): boolean; //Indica si hay "n" bytes libres
procedure UseConsecRAM(const i, n: word); //Ocupa "n" bytes en la posición "i"
procedure SetSharedUnused;
procedure SetSharedUsed;
public //ram memory functions
function UsedMemRAM: word; //devuelve el total de memoria ram usada
procedure ClearMemFlash;
public //Pins fields
Npins : byte; //Number of pins
pines : array[1..PIC_MAX_PINES] of TPICPin;
procedure ResetPins;
procedure SetPin(pNumber: integer; pLabel: string; pType: TPICPinType);
function SetPinName(strDef: string): boolean;
public //RAM name managment
function NameRAM(const addr: word): string;
procedure SetNameRAM(const addr: word; const nam: string); //Fija nombre a una celda de RAM
procedure AddNameRAM(const addr: word; const nam: string); //Agrega nombre a una celda de RAM
public //Execution control
procedure AddBreakpoint(aPC: word);
procedure ToggleBreakpoint(aPC: word);
procedure Exec(aPC: word); virtual; abstract; //Ejecuta la instrucción en la dirección indicada.
procedure Exec; virtual; abstract; //Ejecuta instrucción actual
procedure ExecTo(endAdd: word); virtual; abstract; //Ejecuta hasta cierta dirección
procedure ExecStep; virtual; abstract; //Execute one instruction considering CALL as one instruction
procedure ExecNCycles(nCyc: integer; out stopped: boolean); virtual; abstract; //Ejecuta hasta cierta dirección
procedure Reset; virtual; abstract;
function ReadPC: dword; virtual; abstract; //Defined DWORD to cover the 18F PC register
procedure WritePC(AValue: dword); virtual; abstract;
public //Others
procedure addTopLabel(lbl: string); //Add a comment to the ASM code
procedure addTopComm(comm: string; replace: boolean = true); //Add a comment to the ASM code
procedure addSideComm(comm: string; before: boolean); //Add lateral comment to the ASM code
procedure addPosInformation(rowSrc, colSrc: word; idFile: byte);
public //Initialization
constructor Create; virtual;
destructor Destroy; override;
end;
implementation
{ TPICRamCell }
function TPICRamCell.Getvalue: byte;
begin
Result := Fvalue;
end;
procedure TPICRamCell.Setvalue(AValue: byte);
begin
Fvalue := AValue;
end;
function TPICRamCell.AvailGPR: boolean;
{Indica si el registro es una dirección disponible en la memoria RAM.}
begin
Result := (state = cs_impleGPR);
end;
{ TPICPin }
function TPICPin.GetLabel: string;
{Devuelve una etiqueta para el pin}
begin
case typ of
pptUnused: Result := 'NC';
else
Result := nam;
end;
end;
procedure TPicCore.SetMaxFlash(AValue: integer);
begin
if FMaxFlash = AValue then Exit;
FMaxFlash := AValue;
end;
{ TPicCore }
//Creación de archivo *.hex
function TPicCore.HexChecksum(const lin:string): string;
//Devuelve los caracteres en hexadecimal del Checksum, para el archivo *.hex
var
i: Integer;
chk: Integer;
part: String;
begin
i:=1;
chk := 0;
while i<length(lin) do begin
part := copy(lin,i,2);
chk := chk + StrToInt('$'+part);
inc(i,2);
end;
chk := not chk; //complemento a 1
inc(chk); //complemento a 2
part := IntToHex(chk,4); //a hexadecimal
Result := copy(part, length(part)-1,2); //recorta
end;
procedure TPicCore.GenHexComm(comment: string);
//Agrega una línea de comentario al archivo *.hex
begin
hexLines.Add(';'+comment);
end;
procedure TPicCore.GenHexExAdd(Data: word);
//Agrega una línea de Extended Address al archivo *.hex
const RecordType = '04';
var
ByteCount: Integer;
lin: String;
begin
ByteCount := 2;
lin:= IntToHex(ByteCount,2) + '0000' + RecordType + IntToHex(Data,4);
hexLines.Add(':' + lin + HexChecksum(lin));
end;
procedure TPicCore.GenHexData(Address: word; Data: string);
//Agrega una línea de datos al archivo *.hex
const RecordType = '00';
var
ByteCount: Integer;
lin: String;
begin
ByteCount := length(data) div 2;
lin:= IntToHex(ByteCount,2) + IntToHex(Address*2,4) + RecordType + Data;
hexLines.Add(':'+lin + HexChecksum(lin));
end;
procedure TPicCore.GenHexEOF;
//Agrega una línea de Extended Address al archivo *.hex
begin
hexLines.Add(':00000001FF');
end;
function TPicCore.StrHexFlash(i1, i2: integer): string;
{Devuelve la cadena, de bytes hexadecimales de la memoria Flash, desde la posición
i1 hasta i2.}
var
i: Integer;
tmp: String;
begin
Result:='';
for i:=i1 to i2 do begin
tmp := IntToHex(ram[i].value,4);
Result+=copy(tmp,3,2) + copy(tmp,1,2); //se graba con los bytes invertidos
end;
end;
//RAM memory functions
procedure TPicCore.ClearMemRAM;
{Limpia el contenido de la memoria}
var
i: Integer;
begin
for i:=0 to high(ram) do begin
ram[i].dvalue := $00;
ram[i].used := false;
ram[i].name:='';
ram[i].shared := false;
// ram[i].state := cs_unimplem; //por defecto se considera no implementado
end;
end;
procedure TPicCore.DisableAllRAM;
{Inicia el estado de toda la memoria RAM física definida em el Modelo.
Solo debería usarse, para cuando se va a definir el hardware del dispositivo.}
var
i: word;
begin
for i:=0 to high(ram) do begin
ram[i].addr := i;
ram[i].state := cs_unimplem;
end;
//Inicia estado de pines
for i:=1 to high(pines) do begin
pines[i].typ := pptUnused;
end;
end;
procedure TPicCore.SetStatRAM(i1, i2: word; status0: TPICCellState);
{Inicia el campo State, de la memoria. Permite definir el estado real de la memoria RAM.
}
var
i: Integer;
begin
for i:=i1 to i2 do begin //verifica 1 a 1, por seguridad
if i>PICMAXRAM-1 then continue; //protection
ram[i].state := status0;
end;
end;
function TPicCore.SetStatRAMCom(strDef: string): boolean;
{Define el estado de la memoria RAM, usando una cadena de definición.
La cadena de definición, tiene el formato:
<comando 1>, <comando 2>, ...
Cada comando, tiene el formato:
<dirIni>-<dirFin>:<estado de memoria>
Un ejemplo de cadena de definición, es:
'000-01F:IMP, 020-07F:NIM'
Si hay error, devuelve FALSE, y el mensaje de error en MsjError.
}
var
coms: TStringList;
add1, add2: longint;
state: TPICCellState;
staMem, com, str: String;
begin
Result := true;
coms:= TStringList.Create;
try
coms.Delimiter := ',';
coms.DelimitedText := strDef;
for str in coms do begin
com := UpCase(trim(str));
if com='' then continue;
if length(com)<>11 then begin
MsjError := 'Memory definition syntax error: Bad string size.';
exit(false);
end;
if com[4] <> '-' then begin
MsjError := 'Memory definition syntax error: Expected "-".';
exit(false);
end;
if com[8] <> ':' then begin
MsjError := 'Memory definition syntax error: Expected ":".';
exit(false);
end;
//Debe tener el formato pedido
if not TryStrToInt('$'+copy(com,1,3), add1) then begin
MsjError := 'Memory definition syntax error: Wrong address.';
exit(false);
end;
if not TryStrToInt('$'+copy(com,5,3), add2) then begin
MsjError := 'Memory definition syntax error: Wrong address.';
exit(false);
end;
staMem := copy(com, 9, 3);
case staMem of
'IMP': state := cs_impleGPR;
'NIM': state := cs_unimplem;
else
MsjError := 'Memory definition syntax error: Expected SFR or GPR';
exit(false);
end;
//Ya se tienen los parámetros, para definir la memoria
SetStatRAM(add1, add2, state);
end;
finally
coms.Destroy;
end;
end;
function TPicCore.MapRAMtoPIN(strDef: string): boolean;
{Mapea puertos de memoria RAM a pines físicos del dispositivo. Útil para la simulación
La cadena de definición, tiene el formato:
<dirección>:<comando 1>, <comando 2>, ...
Cada comando, tiene el formato:
<dirIni>-<dirFin>:<banco al que está mapeado>
Un ejemplo de cadena de definición, es:
'005:0-17,1-18,2-1,3-2,4-3'
Si hay error, devuelve FALSE, y el mensaje de error en MsjError.
}
var
coms: TStringList;
add1, pin, bit: longint;
com, str, ramName: String;
pSep: SizeInt;
begin
Result := true;
//Obtiene dirección
if length(strDef) < 4 then begin
MsjError := 'Syntax error';
exit(false);
end;
if strDef[4] <> ':' then begin
MsjError := 'Expected "<3-digits address>"';
exit(false);
end;
if not TryStrToInt('$'+copy(strDef,1,3), add1) then begin
MsjError := 'Address format error.';
exit(false);
end;
delete(strDef, 1, 4); //quita la dirección
//Obtiene lista de asociaciones
coms:= TStringList.Create;
try
coms.Delimiter := ',';
coms.DelimitedText := strDef;
for str in coms do begin
com := UpCase(trim(str)); //asociación
if com='' then continue;
pSep := pos('-',com); //Posición de separador
if pSep = 0 then begin
MsjError := 'Expected "-".';
exit(false);
end;
//Debe tener el formato pedido
// debugln(com);
if not TryStrToInt(copy(com,1,pSep-1), bit) then begin
MsjError := 'Error in bit number.';
exit(false);
end;
if not TryStrToInt(copy(com,pSep+1,length(com)), pin) then begin
MsjError := 'Error in pin number.';
exit(false);
end;
if (pin<0) or (pin>PIC_MAX_PINES) then begin
MsjError := 'Pin number out of range.';
exit(false);
end;
if pin>Npins then begin
MsjError := 'Pin number out of range, for this device.';
exit(false);
end;
//Ya se tiene el BIT y el PIN. Configura datos del PIN
pines[pin].add := add1;
pines[pin].bit := bit;
pines[pin].typ := pptPort;
ramName := ram[add1].name;
if ramName='' then ramName := 'PORT';
pines[pin].nam := ramName + '.' + IntToStr(bit); //Nombre por defecto
end;
finally
coms.Destroy;
end;
end;
procedure TPicCore.ResetPins;
{Reset the pins of the device.}
var
i: byte;
begin
for i:=1 to Npins do begin
pines[i].nam := ' ';
pines[i].typ := pptUnused;
end;
end;
procedure TPicCore.SetPin(pNumber: integer; pLabel: string; pType: TPICPinType);
begin
if pNumber>PIC_MAX_PINES then exit;
pines[pNumber].nam := pLabel;
pines[pNumber].typ := pType;
end;
function TPicCore.SetPinName(strDef: string): boolean;
{Define the name for a specified Pin of the microcontroller, using a string.
"strDef" have the format:
<pin number>:<name of the pin>
On error this function return FALSE, and the error menssage in MsjError.
}
var
com, pinName: String;
pNumber: integer;
pcol: SizeInt;
begin
com := UpCase(trim(strDef));
if com='' then exit;
pcol := Pos(':', strDef);
if pcol=0 then begin
MsjError := 'SetPinName: Expected ":".';
exit(false);
end;
//"com" must have the correct format
if not TryStrToInt( copy(com, 1, pcol-1) , pNumber) then begin
MsjError := 'SetPinName: Wrong Pin Number.';
exit(false);
end;
pinName :=copy(com, pcol+1, 32); //limited to 32
SetPin(pNumber, pinName, pptControl);
end;
function TPicCore.HaveConsecRAM(const i, n: word; maxRam: word): boolean;
{Indica si hay "n" bytes consecutivos libres en la posicióm "i", en RAM.
La búsqueda se hace solo hasta la posición "maxRam"}
var
c: Integer;
j: word;
begin
Result := false;
c := 0;
j := i;
while (j<=maxRam) and (c<n) do begin
if (ram[j].state <> cs_impleGPR) or (ram[j].used) then exit;
inc(c); //verifica siguiente
inc(j);
end;
if j>maxRam then exit; //no hay más espacio
//Si llega aquí es porque estaban libres los bloques
Result := true;
end;
procedure TPicCore.UseConsecRAM(const i, n: word);
{Marca "n" bytes como usados en la posición de memoria "i", en la RAM.
Debe haberse verificado previamente que los parámetros son válidos, porque aquí no
se hará ninguna verificación.}
var j: word;
begin
for j:=i to i+n-1 do begin
ram[j].used := true; //todos los bits
end;
end;
procedure TPicCore.SetSharedUnused;
{Marca las posiciones que estén en "shared", como no usadas, para que se puedan
usar nuevamente.}
var
i: Integer;
begin
for i:=0 to high(ram) do begin
if (ram[i].state = cs_impleGPR) and (ram[i].shared) then begin
ram[i].used := false; //pone en cero
end;
end;
end;
procedure TPicCore.SetSharedUsed;
{Marca las posiciones que estén en "shared", como usadas, para que no se puedan
usar nuevamente.}
var
i: Integer;
begin
for i:=0 to high(ram) do begin
if (ram[i].state = cs_impleGPR) and (ram[i].shared) then begin
ram[i].used := true; //pone en uno
end;
end;
end;
//FLASH memory functions
function TPicCore.UsedMemRAM: word;
var
i: Integer;
begin
Result := 0;
for i:=$0000 to PICMAXFLASH-1 do begin
if ram[i].used then inc(Result);
end;
end;
procedure TPicCore.ClearMemFlash;
var
i: Integer;
begin
for i:=0 to high(ram) do begin
ram[i].value := $3FFF;
ram[i].used := false;
ram[i].breakPnt := false;
ram[i].topLabel := '';
ram[i].sideComment:= '';
ram[i].topComment := '';
ram[i].idFile := -1; //Indica no inicializado
end;
end;
//RAM name managment
function TPicCore.NameRAM(const addr: word): string;
{Devuelve el nombre de una celda de la memoria RAM.}
begin
Result := ram[addr].name;
end;
procedure TPicCore.SetNameRAM(const addr: word; const nam: string
);
{Escribe en el campo "name" de la RAM en la psoición indicada}
begin
ram[addr].name:=nam;
end;
procedure TPicCore.AddNameRAM(const addr: word; const nam: string);
{Escribe en el campo "name" de la RAM en la psoición indicada. Si ya existía un nombre,
lo argega después de una coma.}
begin
if ram[addr].name = '' then begin
ram[addr].name:=nam;
end else begin
ram[addr].name+=','+nam;
end;
end;
//Execution control
procedure TPicCore.AddBreakpoint(aPC: word);
//Agrega un punto de interrupción
begin
if aPC>=PICMAXFLASH then exit;
ram[aPC].breakPnt := true;
end;
procedure TPicCore.ToggleBreakpoint(aPC: word);
//COnmuta el estado del Punto de Interrupción, en la posición indicada
begin
if aPC>=PICMAXFLASH then exit;
ram[aPC].breakPnt := not ram[aPC].breakPnt;
end;
procedure TPicCore.addTopLabel(lbl: string);
begin
ram[iRam].topLabel := lbl;
end;
procedure TPicCore.addTopComm(comm: string; replace: boolean);
{Agrega un comentario de línea al código en la posición de memoria actual}
begin
if replace then begin
ram[iRam].topComment := comm;
end else begin
ram[iRam].topComment := ram[iRam].topComment + comm;
end;
end;
procedure TPicCore.addSideComm(comm: string; before: boolean);
{Agrega un comentario para que apareza al lado de la instrucción.
"before" = TRUE -> Se debe llamar después de codificar la instrucción
"before" = FALSE -> Se debe llamar antes de codificar la instrucción
}
begin
if before then begin
if iRam= 0 then exit;
ram[iRam-1].sideComment+=comm; //se agrega al que pudiera haber
end else begin
if iRam= 0 then exit;
ram[iRam].sideComment+=comm; //se agrega al que pudiera haber
end;
end;
procedure TPicCore.addPosInformation(rowSrc, colSrc: word; idFile: byte);
{Agrega information de la posición en el codigo fuente, a la posición actual de la
memoria flash.}
begin
ram[iRam].rowSrc := rowSrc;
ram[iRam].colSrc := colSrc;
ram[iRam].idFile := idFile;
end;
//Initialization
constructor TPicCore.Create;
begin
hexLines := TStringList.Create;
frequen := 4000000; //4MHz
end;
destructor TPicCore.Destroy;
begin
hexLines.Destroy;
inherited Destroy;
end;
initialization
end.

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