LCD 128x64 T6963C sur PIC16F876
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LCD 128x64 T6963C sur PIC16F876



  1. #1
    invite58388f1a

    Unhappy LCD 128x64 T6963C sur PIC16F876


    ------

    Bonjour tout le monde !

    Je programme en C sur un PIC 16F876 et 16F84A.
    Depuis déjà bien longtemps, je voulais utiliser un ecran lcd que j'avais :
    DataVision, 128x64, backlight, T6963C, 2 x T6A39, T6A40.
    Je me suis debrouillé pour créer un -5V pour le contraste(qui marche bien).
    Je me suis fait une librairie, je l'ai relu mais je n'arrive a rien afficher sur cet ecran.

    Voici la librairie, que l'on peut par ailleurs retrouver sur le net en équivalence :

    #include "tempo.h"

    // Definition des ports A & B
    #define DIR_DATA TRISC
    #define DATA PORTC

    #define DIR_CTRL TRISB
    #define CTRL PORTB
    #define WRITE RB0
    #define READ RB1
    #define CHIP_ENABLED RB2
    #define DATA_or_CODE RB3
    #define RESET RB4
    #define BACKLIGHT RB5

    #define ON 1
    #define OFF 0

    // Definition des fonctions elementaires

    #define NOP asm("nop()");

    // [------------------- Pointer Set -------------------]
    #define Cursor_Pointer_Set PutCode(0x21);
    #define Offset_Register_Set PutCode(0x22);
    #define Address_Pointer_Set PutCode(0x24);

    // [------------------- Control Word -------------------]
    #define Text_Home_Address_Set PutCode(0x40);
    #define Text_Home_Address_High 0x20
    #define Text_Home_Address_Low 0x00

    #define Text_Area_Set PutCode(0x41);
    #define Text_Area_High 0x00
    #define Text_Area_Low 0x14

    #define Graphic_Home_Address_Set PutCode(0x42);
    #define Graphic_Home_Address_High 0x00
    #define Graphic_Home_Address_Low 0x00

    #define Graphic_Area_Set PutCode(0x43);
    #define Graphic_Area_High 0x00
    #define Graphic_Area_Low 0x14

    // [------------------- Mode Set -------------------]
    #define OR_Rom PutCode(0x80);
    #define OR_Ram PutCode(0x88);
    #define EXOR_Rom PutCode(0x81);
    #define EXOR_Ram PutCode(0x89);
    #define AND_Rom PutCode(0x83);
    #define AND_Ram PutCode(0x8B);
    #define Text_Rom PutCode(0x84);
    #define Text_Ram PutCode(0x8C);

    // [------------------- Lecture Ecran -------------------]
    #define Screen_Peeking PutCode(0xE0);
    #define Screen_Copy PutCode(0xE8);


    #define DataWriteIncrement PutCode(0xC0);
    #define DataReadIncrement PutCode(0xC1);
    #define DataWriteDecrement PutCode(0xC2);
    #define DataReadDecrement PutCode(0xC3);
    #define DataWriteUnchange PutCode(0xC4);
    #define DataReadUnchange PutCode(0xC5);

    // Definition des variables
    int BufferRead;


    int Immobile, SensDown, Read;

    void Short_Delay (void)
    {
    char count;
    count = 3;
    while (--count); /* delay */
    }

    void LcdReset(void)
    {
    RESET = 0;
    Tempo_ms(50);
    RESET = 1;
    }

    void GetData(char Val)
    {
    RA0=1;
    DIR_DATA = 0xFF;

    DATA_or_CODE = 0;

    WRITE = 1; READ = 0;
    CHIP_ENABLED = 0;

    Val = DATA;
    Tempo_ms(1);

    CHIP_ENABLED = 1;
    WRITE = 1; READ = 1;
    RA0=0;
    }

    int LcdBusy(void)
    {
    RA0=1;
    DIR_DATA = 0xFF;

    DATA_or_CODE = 1;

    WRITE = 1; READ = 0;
    CHIP_ENABLED = 0;

    BufferRead = DATA;
    Tempo_ms(1);

    CHIP_ENABLED = 1;
    WRITE = 1; READ = 1;
    RA0=0;
    return BufferRead;
    }

    void PutCode(unsigned char Val)
    {
    while((0x03 & LcdBusy()) != 0x03);
    RA2=1;
    DIR_DATA = 0x00;
    DATA = Val;

    DATA_or_CODE = 1;

    WRITE = 0; READ = 1;
    CHIP_ENABLED = 0;

    Tempo_ms(1);

    CHIP_ENABLED = 1;
    WRITE = 1; READ = 1;

    RA2=0;
    }

    void PutData(unsigned char Val)
    {
    while((0x03 & LcdBusy()) != 0x03);
    RA2=1;
    DIR_DATA = 0x00;
    DATA = Val;

    DATA_or_CODE = 0;

    WRITE = 0; READ = 1;
    CHIP_ENABLED = 0;

    Tempo_ms(1);

    CHIP_ENABLED = 1;
    WRITE = 1; READ = 1;

    RA2=0;
    }


    void MoveData(int Immo, int SDown, int ReadAct)
    {
    Immobile = Immo;
    SensDown = SDown;
    Read = ReadAct;
    }

    void DisplayModes(int Graphics, int Text, int Cursor, int CursorBlink)
    {
    PutCode(0x90 + Graphics * 8 + Text * 4 + Cursor * 2 + CursorBlink);
    }

    void CursorPattern(int NbrLigne)
    {
    PutCode(0xA0 + NbrLigne - 1);
    }

    void ChangeBit(int Set, int Position)
    {
    PutCode(0xF0 + Set * 8 + Position);
    }

    void SendCar(char Car)
    {
    char CarT6963C;
    CarT6963C = Car - 0x20;
    PutData(CarT6963C);
    DataWriteIncrement;
    }

    void SetAtHomeAddressMemory(void)
    {
    PutData(0x00);
    PutData(0x00);
    Address_Pointer_Set;
    }

    void SetAtHomeAddressTxt(void)
    {
    PutData(Text_Home_Address_Low) ;
    PutData(Text_Home_Address_High );
    Address_Pointer_Set;
    }

    void SetAtHomeAddressGraph(void)
    {
    PutData(Graphic_Home_Address_L ow);
    PutData(Graphic_Home_Address_H igh);
    Address_Pointer_Set;
    }

    void SetAtHomeCursorMemory(void)
    {
    PutData(0x00);
    PutData(0x00);
    Cursor_Pointer_Set;
    }

    void SetAtHomeCursorTxt(void)
    {
    PutData(Text_Home_Address_Low) ;
    PutData(Text_Home_Address_High );
    Cursor_Pointer_Set;
    }

    void SetAtHomeCursorGraph(void)
    {
    PutData(Graphic_Home_Address_L ow);
    PutData(Graphic_Home_Address_H igh);
    Cursor_Pointer_Set;
    }

    void ClearScreen(void)
    {
    int i;
    SetAtHomeAddressMemory();
    PutCode(0xB0);
    for(i = 0; i < 0x2000; i++) PutData(0xFF);
    PutCode(0xB2);
    SetAtHomeAddressMemory();
    }

    void LcdInit(void)
    {
    DIR_DATA = 0x00;
    DATA = 0;
    DIR_CTRL = 0x00;

    RESET = 1;
    WRITE = 1;
    READ = 1;
    CHIP_ENABLED = 1;
    BACKLIGHT = OFF;

    LcdReset();

    MoveData(0,0,0);

    AND_Rom;


    PutData(Graphic_Home_Address_L ow); // Graphic Home address
    PutData(Graphic_Home_Address_H igh);
    Graphic_Home_Address_Set; // 0x42

    PutData(Graphic_Area_Low); // Graphic Area set
    PutData(Graphic_Area_High);
    Graphic_Area_Set; // 0x43

    PutData(Text_Home_Address_Low) ; // Text Home address
    PutData(Text_Home_Address_High );
    Text_Home_Address_Set; // 0x40

    PutData(Text_Area_Low); // Text Area set
    PutData(Text_Area_High);
    Text_Area_Set; // 0x41


    PutData(Text_Home_Address_Low) ;
    PutData(Text_Home_Address_High );
    Address_Pointer_Set;

    PutData(Text_Home_Address_Low) ;
    PutData(Text_Home_Address_High );
    Cursor_Pointer_Set;


    }
    La librairie Tempo qui marche tres bien, verifié avec des leds et à l'oscilloscope :

    unsigned char Nbr;
    unsigned char Count;
    int FinTempo;


    void TempoInit(void);
    void Tempo_ms(int );
    void Tempo_s(int );
    static void interrupt Timer(void);


    void TempoInit(void)
    {
    GIE=1; PEIE=1;
    }


    void Tempo_ms(int Millisecondes) // Pas plus de 200ms
    {
    OPTION = 0b10000001; // Configuration tempo
    // 4 * 256 * 1 = 1.024ms
    FinTempo = 0;
    Nbr = 0;
    Count = Millisecondes;
    T0IE = 1;
    while(FinTempo!=1);
    }

    void Tempo_s(int Secondes)
    {
    OPTION = 0b10000101; // Configuration tempo
    // 4 * 256 * 1 = 1.024ms
    FinTempo = 0;
    Nbr = 0;
    Count = Secondes * 61;
    T0IE = 1;
    while(FinTempo!=1);
    }

    static void interrupt Timer(void)
    {
    if (T0IF)
    {
    Nbr++;
    if (Nbr>=Count)
    {
    FinTempo = 1;
    T0IE = 0;
    }
    T0IF=0;
    }
    }
    Le programme principale :

    #include "pic1687x.h"
    #include "LCD12864.h"

    void main(void)
    {
    TempoInit();
    LcdInit();

    ADCON1=6; // PORT A passe en mode Numérique
    OPTION=0b10000101; // Configure tmr0 pour 64µs par bit

    //[---------- Init Port ----------]


    ClearScreen();
    do
    {
    SendCar('A');
    }
    while(1);

    }
    Je remercie tout ceux qui voudront bien m'aider...
    Je commence vraiment à saturer...

    Merci

    nk36

    -----

  2. #2
    invite58388f1a

    Arrow Re : LCD 128x64 T6963C sur PIC16F876

    Bonjour !
    Bon j'ai trouvé mon probleme qui etait en fait niveau hard...
    PORTC => 45673210
    Au lieu de 76543210
    Du coup les commandes envoyer ne correspondait pas...
    Maintenant j'ai d'autres problemes...
    Il me met une erreur :
    Error [491] ; . can't find 0x2 words for psect "rdata_0" in segment "BANK0"
    Error [593] ; . can't find 0x3 words (0x3 withtotal) for psect "xtemp" in segment "BANK0"
    Error [593] ; . can't find 0x2 words (0x2 withtotal) for psect "code_ptr" in segment "BANK0"
    Error [593] ; . can't find 0x2 words (0x2 withtotal) for psect "intsave" in segment "BANK0"

    Je ne comprend pas comment il faut faire pour changer de "bank" en C
    Please help me !!!
    Je precise que je suis sur MPLab 7.62 avec PICC et que la cible est un PIC16F876.
    Merci tout le monde (ou personne lol)

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