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LPC1768 + AT24C08 - Timeout problem

ALEXANDRE PERUSSI
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Hello, I am using a AT24C08 for store some datas and I'm having trouble. I am using code sample for I2C. The data is being written and read perfectly, but the function I2CStart() return always "timeout". This "problem" causes a delay in my routines of W/R. I believe it is necessary some modification in I2C0_IRQHandler() function. Someone could review my code?

I implemented a matricial keypad for tests of write and read.

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    main.c

    int main (void)
{
        char temp[16];
        unsigned char c = 0;
        unsigned int i = 0;

        SystemInit();
        SysTick_Config(SystemFrequency/100);  /* Generate interrupt each 10 ms      */

        if ( I2CInit( (uint32_t)I2CMASTER ) == FALSE )  /* initialize I2c */
        {
                while ( 1 );                            /* Fatal error */
        }

        /* Initialize RTC with RTCCAL and RTCDIR values */
        InitRTC();
        /* start RTC */
        StartRTC();

        init_KEYPAD();
        lcd_clear();

        while(1)
        {
                c = get_KEYPAD();
                if(c == '1')
                {
                        for ( i = 0; i < BUFSIZE; i++ )      /* clear buffer */
                        {
                                I2CMasterBuffer[i] = 0;
                        }

                        I2CWriteLength = 5;
                        I2CReadLength = 0;
                        I2CMasterBuffer[0] = AT24C08_ADDR;
                        I2CMasterBuffer[1] = 0x00;              /* address offset for user seq. */

                        I2CMasterBuffer[2] = LPC_RTC->HOUR;
                        I2CMasterBuffer[3] = LPC_RTC->MIN;
                        I2CMasterBuffer[4] = LPC_RTC->SEC;
                        I2CEngine();
                }
                if(c == '2')
                {
                        for ( i = 0; i < BUFSIZE; i++ )
                        {
                                I2CSlaveBuffer[i] = 0x00;
                        }
                        /* Write SLA(W), address, SLA(R), and read one byte back. */
                        I2CWriteLength = 2;
                        I2CReadLength = 20;
                        I2CMasterBuffer[0] = AT24C08_ADDR;
                        I2CMasterBuffer[1] = 0x00;              /* address */
                        I2CMasterBuffer[2] = AT24C08_ADDR | RD_BIT;
                        I2CEngine();

                }
                lcd_gotoxy(0,0);
                sprintf(temp,"%d:%d:%d",I2CSlaveBuffer[0],I2CSlaveBuffer[1],I2CSlaveBuffer[2]);
                lcd_print(temp);
        }

        return 0;

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    main.c

    int main (void)
{
        char temp[16];
        unsigned char c = 0;
        unsigned int i = 0;

        SystemInit();
        SysTick_Config(SystemFrequency/100);  /* Generate interrupt each 10 ms      */

        if ( I2CInit( (uint32_t)I2CMASTER ) == FALSE )  /* initialize I2c */
        {
                while ( 1 );                            /* Fatal error */
        }

        /* Initialize RTC with RTCCAL and RTCDIR values */
        InitRTC();
        /* start RTC */
        StartRTC();

        init_KEYPAD();
        lcd_clear();

        while(1)
        {
                c = get_KEYPAD();
                if(c == '1')
                {
                        for ( i = 0; i < BUFSIZE; i++ )      /* clear buffer */
                        {
                                I2CMasterBuffer[i] = 0;
                        }

                        I2CWriteLength = 5;
                        I2CReadLength = 0;
                        I2CMasterBuffer[0] = AT24C08_ADDR;
                        I2CMasterBuffer[1] = 0x00;              /* address offset for user seq. */

                        I2CMasterBuffer[2] = LPC_RTC->HOUR;
                        I2CMasterBuffer[3] = LPC_RTC->MIN;
                        I2CMasterBuffer[4] = LPC_RTC->SEC;
                        I2CEngine();
                }
                if(c == '2')
                {
                        for ( i = 0; i < BUFSIZE; i++ )
                        {
                                I2CSlaveBuffer[i] = 0x00;
                        }
                        /* Write SLA(W), address, SLA(R), and read one byte back. */
                        I2CWriteLength = 2;
                        I2CReadLength = 20;
                        I2CMasterBuffer[0] = AT24C08_ADDR;
                        I2CMasterBuffer[1] = 0x00;              /* address */
                        I2CMasterBuffer[2] = AT24C08_ADDR | RD_BIT;
                        I2CEngine();

                }
                lcd_gotoxy(0,0);
                sprintf(temp,"%d:%d:%d",I2CSlaveBuffer[0],I2CSlaveBuffer[1],I2CSlaveBuffer[2]);
                lcd_print(temp);
        }

        return 0;

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