implicit declaration of function `sbi'

**veloxid** · 07.07.2005, 10:12

HI ich hab hier einen programm text, mit dem unterprogramm i2c.c von Pascal Stang. Bei dem wird die funkttion sbi aufgerufen. Bei makefile gibt er mir dann die oben genannte fehlermeldung aus.
Die funktion wird in der main unit aufgerufen und gibt dort keinen error aus.
Woran kann das liegen?

Hier das UNterprogamm bis einschließlich dem fehler:

Code:

/*! \file i2c.c \brief I2C interface using AVR Two-Wire Interface (TWI) hardware. */
//*****************************************************************************
//
// File Name    : 'i2c.c'
// Title        : I2C interface using AVR Two-Wire Interface (TWI) hardware
// Author       : Pascal Stang - Copyright (C) 2002-2003
// Created      : 2002.06.25
// Revised      : 2003.03.02
// Version      : 0.9
// Target MCU   : Atmel AVR series
// Editor Tabs  : 4
//
// Description : I2C (pronounced "eye-squared-see") is a two-wire bidirectional
//      network designed for easy transfer of information between a wide variety
//      of intelligent devices.  Many of the Atmel AVR series processors have
//      hardware support for transmitting and receiving using an I2C-type bus.
//      In addition to the AVRs, there are thousands of other parts made by
//      manufacturers like Philips, Maxim, National, TI, etc that use I2C as
//      their primary means of communication and control.  Common device types
//      are A/D & D/A converters, temp sensors, intelligent battery monitors,
//      MP3 decoder chips, EEPROM chips, multiplexing switches, etc.
//
//      I2C uses only two wires (SDA and SCL) to communicate bidirectionally
//      between devices.  I2C is a multidrop network, meaning that you can have
//      several devices on a single bus.  Because I2C uses a 7-bit number to
//      identify which device it wants to talk to, you cannot have more than
//      127 devices on a single bus.
//
//      I2C ordinarily requires two 4.7K pull-up resistors to power (one each on
//      SDA and SCL), but for small numbers of devices (maybe 1-4), it is enough
//      to activate the internal pull-up resistors in the AVR processor.  To do
//      this, set the port pins, which correspond to the I2C pins SDA/SCL, high.
//      For example, on the mega163, sbi(PORTC, 0); sbi(PORTC, 1);.
//
//      For complete information about I2C, see the Philips Semiconductor
//      website.  They created I2C and have the largest family of devices that
//      work with I2C.
//
// Note: Many manufacturers market I2C bus devices under a different or generic
//      bus name like "Two-Wire Interface".  This is because Philips still holds
//      "I2C" as a trademark.  For example, SMBus and SMBus devices are hardware
//      compatible and closely related to I2C.  They can be directly connected
//      to an I2C bus along with other I2C devices are are generally accessed in
//      the same way as I2C devices.  SMBus is often found on modern motherboards
//      for temp sensing and other low-level control tasks.
//
// This code is distributed under the GNU Public License
//      which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************

#include <inttypes.h>
#include <stdbool.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#include <stdlib.h>
#include <math.h>
#include <avr/io.h>
#include <avr/signal.h>
#include <avr/interrupt.h>

#include <compat/twi.h>

#include "i2c.h"

//#include "stdserial.h"

// Standard I2C bit rates are:
// 100KHz for slow speed
// 400KHz for high speed

#define I2C_DEBUG

// I2C state and address variables
static volatile eI2cStateType I2cState;
static u08 I2cDeviceAddrRW;
// send/transmit buffer (outgoing data)
static u08 I2cSendData[I2C_SEND_DATA_BUFFER_SIZE];
static u08 I2cSendDataIndex;
static u08 I2cSendDataLength;
// receive buffer (incoming data)
static u08 I2cReceiveData[I2C_RECEIVE_DATA_BUFFER_SIZE];
static u08 I2cReceiveDataIndex;
static u08 I2cReceiveDataLength;

// function pointer to I2C receive routine
//! I2cSlaveReceive is called when this processor
// is addressed as a slave for writing
static void (*i2cSlaveReceive)(u08 receiveDataLength, u08* recieveData);
//! I2cSlaveTransmit is called when this processor
// is addressed as a slave for reading
static u08 (*i2cSlaveTransmit)(u08 transmitDataLengthMax, u08* transmitData);

// functions
void i2c_Init(void)
{
    // set pull-up resistors on I2C bus pins
    sbi(PORTC, 0);  // I2C SCL on ATmega163,323,16,32,etc
    sbi(PORTC, 1);  // I2C SDA on ATmega163,323,16,32,etc
    //sbi(PORTD, 0);  // I2C SCL on ATmega128,64
    //sbi(PORTD, 1);  // I2C SDA on ATmega128,64

    // clear SlaveReceive and SlaveTransmit handler to null
    i2cSlaveReceive = 0;
    i2cSlaveTransmit = 0;
    // set I2C bit rate to 100KHz
    i2cSetBitrate(100);
    // enable TWI (two-wire interface)
    sbi(TWCR, TWEN);
    // set state
    I2cState = I2C_IDLE;
    // enable TWI interrupt and slave address ACK
    sbi(TWCR, TWIE);
    sbi(TWCR, TWEA);
    //outb(TWCR, (inb(TWCR)&TWCR_CMD_MASK)|BV(TWINT)|BV(TWEA));
    // enable interrupts
    sei();
}