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using I2c interface to connect ARM LPC2132 to serial EEPROM

Amit Ghatwal over 19 years ago

Hi all,

I am tryin to interface serial EEprom CAT24WC01 to ARM based LPC2132 using I2C only.

Has anyone worked on this set up before , or has anyone already written drivers for same already ?

If someone has already done this please send me info about this ... I am in kind of a hurry to finish this .

Regards
Amit

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0 Georg Bunter over 19 years ago

My Programm is for ADuC7026 and 24C16.
Maybee helpful.
Some registernames are to be adapted.

//my global variables
unsigned char dat[2048];
unsigned int i,k;



//**************************************************************************
void eeprom_read()
{
        for(k=0;k<256;k++)
        {
                i = 0;
                I2C1ADR = 0xA0+((k>>5)<<1); // set i2c address(LSB = 0, Master Write)
                I2C1MTX = (k<<3)&255;         // send i2c byte address
                delay(4000);
                I2C1ADR = 0xA1+((k>>5)<<1); // set i2c address(LSB = 1, Master Read)
                I2C1CNT = 7;                            // 8 bytes to be read from slave
                while(i < 8){}
        }
}
//**************************************************************************
void IRQ_Handler() __irq __ram
{
        if(I2C1MSTA & 0x8) dat[(k<<3)+i++] = I2C1MRX;
}
//**************************************************************************

Reply

0 Georg Bunter over 19 years ago

My Programm is for ADuC7026 and 24C16.
Maybee helpful.
Some registernames are to be adapted.

//my global variables
unsigned char dat[2048];
unsigned int i,k;



//**************************************************************************
void eeprom_read()
{
        for(k=0;k<256;k++)
        {
                i = 0;
                I2C1ADR = 0xA0+((k>>5)<<1); // set i2c address(LSB = 0, Master Write)
                I2C1MTX = (k<<3)&255;         // send i2c byte address
                delay(4000);
                I2C1ADR = 0xA1+((k>>5)<<1); // set i2c address(LSB = 1, Master Read)
                I2C1CNT = 7;                            // 8 bytes to be read from slave
                while(i < 8){}
        }
}
//**************************************************************************
void IRQ_Handler() __irq __ram
{
        if(I2C1MSTA & 0x8) dat[(k<<3)+i++] = I2C1MRX;
}
//**************************************************************************

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