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Thema: Wie kann ich mit C I2c-Befehle ausgeben ?

  1. #1
    faboi
    Gast

    Wie kann ich mit C I2c-Befehle ausgeben ?

    Anzeige

    Mein Vorhaben ist:

    Mit einem 80C535-Compuboard (Eigenentwicklung der Elektronikschule) mit der Programmiersprache C euer RN-Speak Modul über I2C ansteuern.

    Ich bin deshalb auf der Suche nach einer C-Bibliothek welche I2c-Befehle beinhaltet.

    Das ganze ist eine Projektarbeit und bitte euch deshalb mir ein bischen unter die Arme zu greifen.

    Im voraus Besten Dank
    Gruß
    faboi

  2. #2
    Neuer Benutzer Öfters hier
    Registriert seit
    07.01.2006
    Beiträge
    10

    http://www.8052.com/codelib.phtml

    // Credit where its due : seeprom routines i have converted Peter Daneegers software bit bang routines to hard I2C with minor changes.

    /* I2C Status Message Codes (Master mode) */
    #define START_TXD 0x08 /* Start condition for bus transmited */
    #define REPEAT_START_TXD 0x10 /* Repeated Start condition for bus transmited */
    #define ADDRESS_TXD_ACK 0x18 /* Address plus write sent, ack received */
    #define ADDRESS_TXD_NOACK 0x20 /* Address plus write sent, NO ack received! */
    #define DATA_TXD_ACK 0x28 /* Data sent, ack received */
    #define DATA_TXD_NOACK 0x30 /* Data sent, NO ack received! */
    #define ARB_LOST 0x38 /* I2C Master Arbitration Lost */
    #define ADDRESS_RXD_ACK 0x40 /* Address plus read sent, ack received */
    #define ADDRESS_RXD_NOACK 0x48 /* Address plus read sent, NO ack received! */
    #define DATA_RXD_ACK 0x50 /* Data received, ack sent */
    #define DATA_RXD_NOACK 0x58 /* Data received, NO ack sent! */

    // I2CON Register bit values for bit masking operations.

    #define I2B_I2EN 0x40
    #define I2B_STA 0x20
    #define I2B_STO 0x10
    #define I2B_SI 0x08
    #define I2B_AA 0x04

    #define I2BX_I2EN 0xBF
    #define I2BX_STA 0xDF
    #define I2BX_STO 0xEF
    #define I2BX_SI 0xF7
    #define I2BX_AA 0xFB

    // Page size of eeprom 2^n here 2^3=8
    #define WRITEPAGE 3

    // Function protypes.
    bit hi2c_in(bit, uchar *);
    bit hi2c_out(uchar);
    bit hi2c_stop(void);
    bit hi2c_start(void);

    bit read_pcf8591(uchar *, uchar);
    bit Seepromwrite( uint adr, uchar *s, uchar n );
    bit Seepromread( uint adr, uchar *s, uchar n );

    // Generates start condition on I2C bus returns 1 if error else returns 0.
    bit hi2c_start(void)
    {
    I2CON=0x00; // I2C speed set using I2SCL & I2SCH
    I2CON|=I2B_I2EN; // Enable I2C Bus.
    I2CON|=I2B_STA; // Send Start condition.
    while (!(I2CON & I2B_SI) ); // Wait for si.

    if ( (I2STA!= START_TXD) && (I2STA!=REPEAT_START_TXD)) // If Status not as expected.
    {
    I2CON&=I2BX_STA; // Clear start bit;
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // return error.
    }

    I2CON&=I2BX_STA; // Clear start bit;
    return 0;
    }

    // Generates stop condition returns 1 if error else 0.
    bit hi2c_stop(void)
    {
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 0;
    }

    // Reads byte from I2C bus parameters ack to send pointer to uchar to store data.
    // Returns 1 if error in operation.
    bit hi2c_in(bit ack, uchar *i2rxdata)
    {
    if ( ack ) // set auto acknowledge flag if ack is to be sent.
    I2CON|= I2B_AA;
    else
    I2CON&= I2BX_AA;

    I2CON&=I2BX_SI; // Clear SI.
    while (!( I2CON & I2B_SI ) ); // Wait for SI.

    if ((I2STA!= DATA_RXD_ACK) && (I2STA!= DATA_RXD_NOACK)) // If status not as expected.
    {
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // Return error.
    }
    *i2rxdata=I2DAT; // Store received data.
    return 0; // Return no error.
    }

    // Transmits a byte on I2C bus parameter byte to send.
    // Returns 1 if error occured.
    bit hi2c_out(uchar i2txdata)
    {
    I2DAT=i2txdata; // Put data to transmit in register.
    I2CON&=I2BX_SI; // Clear SI.
    while ( ! ( I2CON & I2B_SI ) ); // Wait for SI.

    if ((I2STA!=DATA_TXD_ACK) && (I2STA!=ADDRESS_TXD_ACK) && (I2STA!=ADDRESS_RXD_ACK)) // If status not as expected.
    {

    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // Return error.
    }
    return 0; // Return no error.
    }

    // Reads a value from ADC PCF8591 Parameters pointer to uchar to store result and channel no to read.
    // Returns 1 if error occured in operation.
    bit read_pcf8591( uchar *adrdbuff, uchar adch)
    {
    if(hi2c_start()) // Send start condition.
    return 1;
    if(hi2c_out(0x90)) // Send device address + write.
    return 1;
    if(hi2c_out(adch)) // send channel number to read.
    return 1;
    hi2c_stop(); // Send stop condition.

    if(hi2c_start()) // send start condition.
    return 1;
    if(hi2c_out(0x91)) // Send device address + Read.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(0, adrdbuff)) // Final Read data from ADC send nack.
    return 1;
    hi2c_stop(); // Send stop condition.

    return 0; // Return no error.
    }

    // Sends address of memory location in seeprom to read or write.
    // Returns 1 if error occured else returns 0.
    // Parameters address high and low bytes rd/wr bit.
    bit Seepromadr( uchar adrh, uchar adrl, bit rd )
    {
    uchar devadr=0xa2; //I2C Bus Address 0.
    devadr |= rd; //Or the RD/WR bit.

    hi2c_start(); //Send a start codition.
    if( hi2c_out( devadr )) //Send the device address.
    return 1;
    if(!rd) //If Write Operation.
    {
    if( hi2c_out( adrh )) //Send the address high byte.
    return 1;
    return hi2c_out( adrl ); //Send the address low byte.
    }
    return 0; // Return no error.
    }

    // Writes specified no. of bytes to seeprom.
    // Parameters starting address location, pointer to data buffer, no. of bytes to write.
    // Returns 1 if error occured else returns 0.
    bit Seepromwrite( uint adr, uchar *s, uchar n )
    {
    uchar i;
    do
    {
    // Acknowledge pooling for eeprom since seeproms dont respond when busy writing.
    for( i = 255;; )
    {
    if( 0 == Seepromadr( adr>>8, adr, 0) )
    break; // receive ACK = write finished
    hi2c_stop();
    if( 0 == --i ) // try it 25.5msec
    return 1; // Timeout
    }

    if( 0 == n )
    return hi2c_stop(); // all bytes written

    i = adr & ((1 << WRITEPAGE) - 1); // prepare write boundary check
    do
    {
    if( hi2c_out( *s ))
    {
    hi2c_stop();
    return 1; // Write error
    }
    s++;
    adr++;
    }while( --n && ++i < (1 << WRITEPAGE));
    hi2c_stop();
    }while(1);
    }

    // Reads specified no. of bytes from seeprom.
    // Parameters starting address location, pointer to data buffer, no. of bytes to read
    // Returns 1 if error occured else returns 0.

    bit Seepromread( uint adr, uchar *s, uchar n )
    {
    if( Seepromadr( adr>>8, adr, 0))
    return 1; // EEPROM not connected
    do
    {
    if( Seepromadr( adr>>8, 0, 1)) // repeat start for read
    return 1;

    for(;
    {
    bit ack = --n && ++adr & 0xff; // last byte or last in page
    if( hi2c_in(ack, s) )
    return 1;


    s++;
    if( !ack )
    break;
    }
    }while( n );
    hi2c_stop(); // send stop condition.
    return 0; // return no error.
    }
    //************************************************** ***************

    Siehe Titel
    Kannst vielleicht verwenden?

  3. #3
    Erfahrener Benutzer Roboter Genie
    Registriert seit
    19.03.2005
    Ort
    Villach
    Alter
    26
    Beiträge
    995
    Hi Tim Pieper,
    bitte gib codes immer in spezielle tags {(php) oder (code)} denn so ist es etwas umständlich zum lesen.
    zb so:

    [php:1:1f76094f1d]// Credit where its due : seeprom routines i have converted Peter Daneegers software bit bang routines to hard I2C with minor changes.

    /* I2C Status Message Codes (Master mode) */
    #define START_TXD 0x08 /* Start condition for bus transmited */
    #define REPEAT_START_TXD 0x10 /* Repeated Start condition for bus transmited */
    #define ADDRESS_TXD_ACK 0x18 /* Address plus write sent, ack received */
    #define ADDRESS_TXD_NOACK 0x20 /* Address plus write sent, NO ack received! */
    #define DATA_TXD_ACK 0x28 /* Data sent, ack received */
    #define DATA_TXD_NOACK 0x30 /* Data sent, NO ack received! */
    #define ARB_LOST 0x38 /* I2C Master Arbitration Lost */
    #define ADDRESS_RXD_ACK 0x40 /* Address plus read sent, ack received */
    #define ADDRESS_RXD_NOACK 0x48 /* Address plus read sent, NO ack received! */
    #define DATA_RXD_ACK 0x50 /* Data received, ack sent */
    #define DATA_RXD_NOACK 0x58 /* Data received, NO ack sent! */

    // I2CON Register bit values for bit masking operations.

    #define I2B_I2EN 0x40
    #define I2B_STA 0x20
    #define I2B_STO 0x10
    #define I2B_SI 0x08
    #define I2B_AA 0x04

    #define I2BX_I2EN 0xBF
    #define I2BX_STA 0xDF
    #define I2BX_STO 0xEF
    #define I2BX_SI 0xF7
    #define I2BX_AA 0xFB

    // Page size of eeprom 2^n here 2^3=8
    #define WRITEPAGE 3

    // Function protypes.
    bit hi2c_in(bit, uchar *);
    bit hi2c_out(uchar);
    bit hi2c_stop(void);
    bit hi2c_start(void);

    bit read_pcf8591(uchar *, uchar);
    bit Seepromwrite( uint adr, uchar *s, uchar n );
    bit Seepromread( uint adr, uchar *s, uchar n );

    // Generates start condition on I2C bus returns 1 if error else returns 0.
    bit hi2c_start(void)
    {
    I2CON=0x00; // I2C speed set using I2SCL & I2SCH
    I2CON|=I2B_I2EN; // Enable I2C Bus.
    I2CON|=I2B_STA; // Send Start condition.
    while (!(I2CON & I2B_SI) ); // Wait for si.

    if ( (I2STA!= START_TXD) && (I2STA!=REPEAT_START_TXD)) // If Status not as expected.
    {
    I2CON&=I2BX_STA; // Clear start bit;
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // return error.
    }

    I2CON&=I2BX_STA; // Clear start bit;
    return 0;
    }

    // Generates stop condition returns 1 if error else 0.
    bit hi2c_stop(void)
    {
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 0;
    }

    // Reads byte from I2C bus parameters ack to send pointer to uchar to store data.
    // Returns 1 if error in operation.
    bit hi2c_in(bit ack, uchar *i2rxdata)
    {
    if ( ack ) // set auto acknowledge flag if ack is to be sent.
    I2CON|= I2B_AA;
    else
    I2CON&= I2BX_AA;

    I2CON&=I2BX_SI; // Clear SI.
    while (!( I2CON & I2B_SI ) ); // Wait for SI.

    if ((I2STA!= DATA_RXD_ACK) && (I2STA!= DATA_RXD_NOACK)) // If status not as expected.
    {
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // Return error.
    }
    *i2rxdata=I2DAT; // Store received data.
    return 0; // Return no error.
    }

    // Transmits a byte on I2C bus parameter byte to send.
    // Returns 1 if error occured.
    bit hi2c_out(uchar i2txdata)
    {
    I2DAT=i2txdata; // Put data to transmit in register.
    I2CON&=I2BX_SI; // Clear SI.
    while ( ! ( I2CON & I2B_SI ) ); // Wait for SI.

    if ((I2STA!=DATA_TXD_ACK) && (I2STA!=ADDRESS_TXD_ACK) && (I2STA!=ADDRESS_RXD_ACK)) // If status not as expected.
    {

    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // Return error.
    }
    return 0; // Return no error.
    }

    // Reads a value from ADC PCF8591 Parameters pointer to uchar to store result and channel no to read.
    // Returns 1 if error occured in operation.
    bit read_pcf8591( uchar *adrdbuff, uchar adch)
    {
    if(hi2c_start()) // Send start condition.
    return 1;
    if(hi2c_out(0x90)) // Send device address + write.
    return 1;
    if(hi2c_out(adch)) // send channel number to read.
    return 1;
    hi2c_stop(); // Send stop condition.

    if(hi2c_start()) // send start condition.
    return 1;
    if(hi2c_out(0x91)) // Send device address + Read.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(0, adrdbuff)) // Final Read data from ADC send nack.
    return 1;
    hi2c_stop(); // Send stop condition.

    return 0; // Return no error.
    }

    // Sends address of memory location in seeprom to read or write.
    // Returns 1 if error occured else returns 0.
    // Parameters address high and low bytes rd/wr bit.
    bit Seepromadr( uchar adrh, uchar adrl, bit rd )
    {
    uchar devadr=0xa2; //I2C Bus Address 0.
    devadr |= rd; //Or the RD/WR bit.

    hi2c_start(); //Send a start codition.
    if( hi2c_out( devadr )) //Send the device address.
    return 1;
    if(!rd) //If Write Operation.
    {
    if( hi2c_out( adrh )) //Send the address high byte.
    return 1;
    return hi2c_out( adrl ); //Send the address low byte.
    }
    return 0; // Return no error.
    }

    // Writes specified no. of bytes to seeprom.
    // Parameters starting address location, pointer to data buffer, no. of bytes to write.
    // Returns 1 if error occured else returns 0.
    bit Seepromwrite( uint adr, uchar *s, uchar n )
    {
    uchar i;
    do
    {
    // Acknowledge pooling for eeprom since seeproms dont respond when busy writing.
    for( i = 255;; )
    {
    if( 0 == Seepromadr( adr>>8, adr, 0) )
    break; // receive ACK = write finished
    hi2c_stop();
    if( 0 == --i ) // try it 25.5msec
    return 1; // Timeout
    }

    if( 0 == n )
    return hi2c_stop(); // all bytes written

    i = adr & ((1 << WRITEPAGE) - 1); // prepare write boundary check
    do
    {
    if( hi2c_out( *s ))
    {
    hi2c_stop();
    return 1; // Write error
    }
    s++;
    adr++;
    }while( --n && ++i < (1 << WRITEPAGE));
    hi2c_stop();
    }while(1);
    }

    // Reads specified no. of bytes from seeprom.
    // Parameters starting address location, pointer to data buffer, no. of bytes to read
    // Returns 1 if error occured else returns 0.

    bit Seepromread( uint adr, uchar *s, uchar n )
    {
    if( Seepromadr( adr>>8, adr, 0))
    return 1; // EEPROM not connected
    do
    {
    if( Seepromadr( adr>>8, 0, 1)) // repeat start for read
    return 1;

    for(;Zwinkern
    {
    bit ack = --n && ++adr & 0xff; // last byte or last in page
    if( hi2c_in(ack, s) )
    return 1;


    s++;
    if( !ack )
    break;
    }
    }while( n );
    hi2c_stop(); // send stop condition.
    return 0; // return no error.
    }
    //************************************************** *************** [/php:1:1f76094f1d]

    oder

    Code:
    // Credit where its due : seeprom routines i have converted Peter Daneegers software bit bang routines to hard I2C with minor changes.
    
    /* I2C Status Message Codes (Master mode) */
    #define START_TXD 0x08 /* Start condition for bus transmited */
    #define REPEAT_START_TXD 0x10 /* Repeated Start condition for bus transmited */
    #define ADDRESS_TXD_ACK 0x18 /* Address plus write sent, ack received */
    #define ADDRESS_TXD_NOACK 0x20 /* Address plus write sent, NO ack received! */
    #define DATA_TXD_ACK 0x28 /* Data sent, ack received */
    #define DATA_TXD_NOACK 0x30 /* Data sent, NO ack received! */
    #define ARB_LOST 0x38 /* I2C Master Arbitration Lost */
    #define ADDRESS_RXD_ACK 0x40 /* Address plus read sent, ack received */
    #define ADDRESS_RXD_NOACK 0x48 /* Address plus read sent, NO ack received! */
    #define DATA_RXD_ACK 0x50 /* Data received, ack sent */
    #define DATA_RXD_NOACK 0x58 /* Data received, NO ack sent! */
    
    // I2CON Register bit values for bit masking operations.
    
    #define I2B_I2EN 0x40
    #define I2B_STA 0x20
    #define I2B_STO 0x10
    #define I2B_SI 0x08
    #define I2B_AA 0x04
    
    #define I2BX_I2EN 0xBF
    #define I2BX_STA 0xDF
    #define I2BX_STO 0xEF
    #define I2BX_SI 0xF7
    #define I2BX_AA 0xFB
    
    // Page size of eeprom 2^n here 2^3=8
    #define WRITEPAGE 3
    
    // Function protypes.
    bit hi2c_in(bit, uchar *);
    bit hi2c_out(uchar);
    bit hi2c_stop(void);
    bit hi2c_start(void);
    
    bit read_pcf8591(uchar *, uchar);
    bit Seepromwrite( uint adr, uchar *s, uchar n );
    bit Seepromread( uint adr, uchar *s, uchar n );
    
    // Generates start condition on I2C bus returns 1 if error else returns 0.
    bit hi2c_start(void)
    {
    I2CON=0x00; // I2C speed set using I2SCL & I2SCH
    I2CON|=I2B_I2EN; // Enable I2C Bus.
    I2CON|=I2B_STA; // Send Start condition.
    while (!(I2CON & I2B_SI) ); // Wait for si.
    
    if ( (I2STA!= START_TXD) && (I2STA!=REPEAT_START_TXD)) // If Status not as expected.
    {
    I2CON&=I2BX_STA; // Clear start bit;
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // return error.
    }
    
    I2CON&=I2BX_STA; // Clear start bit;
    return 0;
    }
    
    // Generates stop condition returns 1 if error else 0.
    bit hi2c_stop(void)
    {
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 0;
    }
    
    // Reads byte from I2C bus parameters ack to send pointer to uchar to store data.
    // Returns 1 if error in operation.
    bit hi2c_in(bit ack, uchar *i2rxdata)
    {
    if ( ack ) // set auto acknowledge flag if ack is to be sent.
    I2CON|= I2B_AA;
    else
    I2CON&= I2BX_AA;
    
    I2CON&=I2BX_SI; // Clear SI.
    while (!( I2CON & I2B_SI ) ); // Wait for SI.
    
    if ((I2STA!= DATA_RXD_ACK) && (I2STA!= DATA_RXD_NOACK)) // If status not as expected.
    {
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // Return error.
    }
    *i2rxdata=I2DAT; // Store received data.
    return 0; // Return no error.
    }
    
    // Transmits a byte on I2C bus parameter byte to send.
    // Returns 1 if error occured.
    bit hi2c_out(uchar i2txdata)
    {
    I2DAT=i2txdata; // Put data to transmit in register.
    I2CON&=I2BX_SI; // Clear SI.
    while ( ! ( I2CON & I2B_SI ) ); // Wait for SI.
    
    if ((I2STA!=DATA_TXD_ACK) && (I2STA!=ADDRESS_TXD_ACK) && (I2STA!=ADDRESS_RXD_ACK)) // If status not as expected.
    {
    
    I2CON|=I2B_STO; // Send stop stop condition.
    I2CON&=I2BX_SI; // Clear SI.
    while ( I2CON & I2B_STO ); // Wait till hardware clears stop bit.
    I2CON&=I2BX_I2EN; // Disable I2C Bus.
    return 1; // Return error.
    }
    return 0; // Return no error.
    }
    
    // Reads a value from ADC PCF8591 Parameters pointer to uchar to store result and channel no to read.
    // Returns 1 if error occured in operation.
    bit read_pcf8591( uchar *adrdbuff, uchar adch)
    {
    if(hi2c_start()) // Send start condition.
    return 1;
    if(hi2c_out(0x90)) // Send device address + write.
    return 1;
    if(hi2c_out(adch)) // send channel number to read.
    return 1;
    hi2c_stop(); // Send stop condition.
    
    if(hi2c_start()) // send start condition.
    return 1;
    if(hi2c_out(0x91)) // Send device address + Read.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(1, adrdbuff)) // Dummy read data from ADC send ack.
    return 1;
    if(hi2c_in(0, adrdbuff)) // Final Read data from ADC send nack.
    return 1;
    hi2c_stop(); // Send stop condition.
    
    return 0; // Return no error.
    }
    
    // Sends address of memory location in seeprom to read or write.
    // Returns 1 if error occured else returns 0.
    // Parameters address high and low bytes rd/wr bit.
    bit Seepromadr( uchar adrh, uchar adrl, bit rd )
    {
    uchar devadr=0xa2; //I2C Bus Address 0.
    devadr |= rd; //Or the RD/WR bit.
    
    hi2c_start(); //Send a start codition.
    if( hi2c_out( devadr )) //Send the device address.
    return 1;
    if(!rd) //If Write Operation.
    {
    if( hi2c_out( adrh )) //Send the address high byte.
    return 1;
    return hi2c_out( adrl ); //Send the address low byte.
    }
    return 0; // Return no error.
    }
    
    // Writes specified no. of bytes to seeprom.
    // Parameters starting address location, pointer to data buffer, no. of bytes to write.
    // Returns 1 if error occured else returns 0.
    bit Seepromwrite( uint adr, uchar *s, uchar n )
    {
    uchar i;
    do
    {
    // Acknowledge pooling for eeprom since seeproms dont respond when busy writing.
    for( i = 255;; )
    {
    if( 0 == Seepromadr( adr>>8, adr, 0) )
    break; // receive ACK = write finished
    hi2c_stop();
    if( 0 == --i ) // try it 25.5msec
    return 1; // Timeout
    }
    
    if( 0 == n )
    return hi2c_stop(); // all bytes written
    
    i = adr & ((1 << WRITEPAGE) - 1); // prepare write boundary check
    do
    {
    if( hi2c_out( *s ))
    {
    hi2c_stop();
    return 1; // Write error
    }
    s++;
    adr++;
    }while( --n && ++i < (1 << WRITEPAGE));
    hi2c_stop();
    }while(1);
    }
    
    // Reads specified no. of bytes from seeprom.
    // Parameters starting address location, pointer to data buffer, no. of bytes to read
    // Returns 1 if error occured else returns 0.
    
    bit Seepromread( uint adr, uchar *s, uchar n )
    {
    if( Seepromadr( adr>>8, adr, 0))
    return 1; // EEPROM not connected
    do
    {
    if( Seepromadr( adr>>8, 0, 1)) // repeat start for read
    return 1;
    
    for(;Zwinkern
    {
    bit ack = --n && ++adr & 0xff; // last byte or last in page
    if( hi2c_in(ack, s) )
    return 1;
    
    
    s++;
    if( !ack )
    break;
    }
    }while( n );
    hi2c_stop(); // send stop condition.
    return 0; // return no error.
    }
    //*****************************************************************

  4. #4
    faboi
    Gast
    Ersteinmal vielen Dank!!!!

    Aber welche Einstellungen/Änderungen muss ich jetzt noch an diesem Code vornehmen bezgl. RNSPEAK??

    Wie binde ich das jetzt ein?Nur eintippen??

    Gibt es evtl. ein Tutorial zu diesem Thema??

    [scroll:bbb2e5bd68]Vielen Dank im voraus für eure Hilfe!!!!!!![/scroll:bbb2e5bd68]

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