File content as of revision 0:fe3c7dde9771:

#include "mbed.h"
#include "i2c_mbed_fpga.h"


char i2cKey[4] = {0x13, 0xA4, 0xD0, 0xD0};
char CtrPortWactive[4] = {0x00, 0x30, 0x00, 0x71};
char CtrPortRactive[4] = {0x00, 0x30, 0x00, 0x01};

/** i2c write to slave DUT
*
*  @param i2c_master specifies the i2c interface
*  @param word is considered as 4byte char data
*/
int i2c_word_write(I2C i2c_master, char *word){
    int ack=1;

    if(ack!=0)
    {
        ack = i2c_master.write(i2c_slave_addr, word, 4, 0);
        wait_ms(1);
    }  

    if(ack==0)
        return 0;
    else
        return 1; 
}


/** i2c read from slave DUT
*
*  @param i2c_master specifies the i2c interface
*  @param word is 4byte, first 2bytes as addr, the rest 2bytes to store data
*/
int i2c_word_read(I2C i2c_master, char *word){
    int ack=1;

    if(ack!=0)
    {
        ack = i2c_master.write(i2c_slave_addr, word, 2, 1);
        ack += i2c_master.read(i2c_slave_addr, word+2, 2, 0);
        wait_ms(1);
    }  

    if(ack==0)
        return 0;
    else
        return 1; 
}


/** i2c enter key
*
*  @param specifc key needed to enter i2c mode of DUT
*/
int i2c_keyEntry(I2C i2c_master){
    return i2c_word_write(i2c_master, i2cKey);
}


/** Activate eeprom for write operations
*
*  @param specifc key needed to enter i2c mode of DUT
*/
int ctrPort_WriteActive(I2C i2c_master){
    return i2c_word_write(i2c_master, CtrPortWactive);
}


/** Activate eeprom for read operations
*
*  @param specifc key needed to enter i2c mode of DUT
*/
int ctrPort_ReadActive(I2C i2c_master){
    return i2c_word_write(i2c_master, CtrPortRactive);
}