TMS320F28020: I2C signal buffer problem

void   I2CA_Init(void);
Uint16 I2CA_WriteData(Uint16 slave_add, Uint16 add, Uint16 data);
void init_LCD();

#define I2C_LCD               0x3E
#define I2C_RGB               0x60
#define I2C_NUMBYTES          2


void
InitI2CGpio()
{
    EALLOW;

    //
    // Enable internal pull-up for the selected pins
    // Pull-ups can be enabled or disabled disabled by the user.
    // This will enable the pullups for the specified pins.
    // Comment out other unwanted lines.
    //
    GpioCtrlRegs.GPBPUD.bit.GPIO32 = 0;    // Enable pull-up for GPIO32 (SDAA)
    GpioCtrlRegs.GPBPUD.bit.GPIO33 = 0;    // Enable pull-up for GPIO33 (SCLA)

    //
    // Set qualification for selected pins to asynch only
    // This will select asynch (no qualification) for the selected pins.
    // Comment out other unwanted lines.
    //
    GpioCtrlRegs.GPBQSEL1.bit.GPIO32 = 3;  // Asynch input GPIO32 (SDAA)
    GpioCtrlRegs.GPBQSEL1.bit.GPIO33 = 3;  // Asynch input GPIO33 (SCLA)

    //
    // Configure SCI pins using GPIO regs
    // This specifies which of the possible GPIO pins will be I2C functional
    // pins. Comment out other unwanted lines.
    //
    GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 1;   // Configure GPIO32 to SDAA
    GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 1;   // Configure GPIO33 to SCLA

    EDIS;
}

void I2CA_Init(void)
{
   // Initialize I2C
   I2caRegs.I2CSAR = I2C_LCD;        // Slave address - EEPROM control code

   #if (CPU_FRQ_150MHZ)             // Default - For 150MHz SYSCLKOUT
        I2caRegs.I2CPSC.all = 14;   // Prescaler - need 7-12 Mhz on module clk (150/15 = 10MHz)
   #endif
   #if (CPU_FRQ_100MHZ)             // For 100 MHz SYSCLKOUT
     I2caRegs.I2CPSC.all = 9;       // Prescaler - need 7-12 Mhz on module clk (100/10 = 10MHz)
   #endif

   I2caRegs.I2CCLKL = 45;           // NOTE: must be non zero
   I2caRegs.I2CCLKH = 45;            // NOTE: must be non zero
//   I2caRegs.I2CIER.all = 0x24;      // Enable SCD & ARDY interrupts

   I2caRegs.I2CMDR.all = 0x0020;    // Take I2C out of reset
                                    // Stop I2C when suspended

   I2caRegs.I2CFFTX.all = 0x6000;   // Enable FIFO mode and TXFIFO
   I2caRegs.I2CFFRX.all = 0x2040;   // Enable RXFIFO, clear RXFFINT,

   return;
}



Uint16 I2CA_WriteData(Uint16 slave_add, Uint16 add, Uint16 data)
{
//   Uint16 i;

   // Wait until the STP bit is cleared from any previous master communication.
   // Clearing of this bit by the module is delayed until after the SCD bit is
   // set. If this bit is not checked prior to initiating a new message, the
   // I2C could get confused.
   if (I2caRegs.I2CMDR.bit.STP == 1)
   {
      return I2C_STP_NOT_READY_ERROR;
   }

   // Setup slave address
   I2caRegs.I2CSAR = slave_add;

   // Check if bus busy
   if (I2caRegs.I2CSTR.bit.BB == 1)
   {
      return I2C_BUS_BUSY_ERROR;
   }

   // Setup number of bytes to send
   // MsgBuffer + Address
   I2caRegs.I2CCNT = 2;

   // Setup data to send
   I2caRegs.I2CDXR = add;
   I2caRegs.I2CDXR = data;

   // Send start as master transmitter
   I2caRegs.I2CMDR.all = 0x6E20;

   return I2C_SUCCESS;
}



void init_LCD()//70.5ms total
{
    //init 3 times, function set
    int i;
    for(i=0;i<3;i++)
    {
        Error=I2CA_WriteData(I2C_LCD,0x80,0x28);
        DELAY_US(15000);
    }
    //display control
    Error=I2CA_WriteData(I2C_LCD,0x80,0x0C);
    DELAY_US(10000);
    //clear display
    Error=I2CA_WriteData(I2C_LCD,0x80,0x01);
    DELAY_US(12000);
    //entry mode set
    Error=I2CA_WriteData(I2C_LCD,0x80,0x06);
    DELAY_US(500);
    //set RGB reg mode 1, output, mode2
    Error=I2CA_WriteData(I2C_RGB,0x00,0x00);
    DELAY_US(500);
    Error=I2CA_WriteData(I2C_RGB,0x08,0xFF);
    DELAY_US(500);
    Error=I2CA_WriteData(I2C_RGB,0x01,0x20);
    DELAY_US(500);
    //set RGB white
    Error=I2CA_WriteData(I2C_RGB,0x04,0x80);
    DELAY_US(500);
    Error=I2CA_WriteData(I2C_RGB,0x03,0x80);
    DELAY_US(500);
    Error=I2CA_WriteData(I2C_RGB,0x02,0x80);
    DELAY_US(500);

}

//###########################################################################
//
// FILE:    Example_2833xI2C_eeprom.c
//
// TITLE:   I2C EEPROM Example
//
//! \addtogroup f2833x_example_list
//! <h1>I2C EEPROM (i2c_eeprom)</h1>
//!
//!  This program requires an external I2C EEPROM connected to
//!  the I2C bus at address 0x50. \n
//!  This program will write 1-14 words to EEPROM and read them back.
//!  The data written and the EEPROM address written to are contained
//!  in the message structure, \b I2cMsgOut1. The data read back will be
//!  contained in the message structure \b I2cMsgIn1.
//!
//!  \b Watch \b Variables \n
//!  - I2cMsgIn1
//!  - I2cMsgOut1
//
//###########################################################################
// $TI Release: F2833x Support Library v2.00.00.00 $
// $Release Date: Thu Oct 18 15:47:35 CDT 2018 $
// $Copyright:
// Copyright (C) 2009-2018 Texas Instruments Incorporated - http://www.ti.com/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
//   Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
//
//   Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the
//   distribution.
//
//   Neither the name of Texas Instruments Incorporated nor the names of
//   its contributors may be used to endorse or promote products derived
//   from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// $
//###########################################################################

//
// Included Files
//
#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File

//
// Note: I2C Macros used in this example can be found in the
// DSP2833x_I2C_defines.h file
//

//
// Function Prototypes
//
void   I2CA_Init(void);
Uint16 I2CA_WriteData(struct I2CMSG *msg);
Uint16 I2CA_ReadData(struct I2CMSG *msg);
//__interrupt void i2c_int1a_isr(void);
void init_LCD();
void print_S();//print �spark�
void print_Format();
void print_N();//print num of spark
void print_FVP();//print freq voltage and power
void pass(void);
void fail(void);

#define I2C_LCD               0x3E
#define I2C_RGB               0x60
#define I2C_NUMBYTES          2
#define NU                    0x00
#define I2C_Command           0x80
#define I2C_Data              0x40

//
// Defines
//
#define I2C_SLAVE_ADDR        0x50
//#define I2C_NUMBYTES          4
#define I2C_EEPROM_HIGH_ADDR  0x00
#define I2C_EEPROM_LOW_ADDR   0x30

//
// Globals
//
Uint16 num_call=0;
Uint16 I2C_Format1[11]={'F',' ',' ',' ',' ','V',' ',' ',' ','P',' '};
//Uint16 I2C_Format2[9]={'P','=',' ',' ',' ','W',' ','N','='};
Uint16 I2C_Spark[5]={'S','P','A','R','K'};
Uint16 I2C_FVP[12]={'0','0','.','0',' ','0','0','0',' ','0','0','0'};// "00.0 000 000" ie 15.0(kHz) 450(V) 300(W)
Uint16 I2C_N[4]={0x30,0x30,0x30,0x30};// "0000" number of spark
Uint16 I2C_P[3]={0x30,0x30,0x30};
//
// Two bytes will be used for the outgoing address, thus only setup 14 bytes
// maximum
//


struct I2CMSG I2cMsgOut1=
{
    I2C_MSGSTAT_SEND_WITHSTOP,
    I2C_LCD,
    I2C_NUMBYTES,
    NU,
    I2C_Command,
    0x12,                   // Msg Byte 1
};
struct I2CMSG I2cMsgOut2=
{
    I2C_MSGSTAT_SEND_WITHSTOP,
    I2C_RGB,
    I2C_NUMBYTES,
    NU,
    I2C_Command,
    0x12,                   // Msg Byte 1
};
struct I2CMSG I2cMsgOut3=
{
    I2C_MSGSTAT_SEND_WITHSTOP,
    I2C_LCD,
    I2C_NUMBYTES,
    NU,
    I2C_Data,
    0x12,                   // Msg Byte 1
};

struct I2CMSG I2cMsgIn1=
{   I2C_MSGSTAT_SEND_NOSTOP,
    I2C_SLAVE_ADDR,
    I2C_NUMBYTES,
    I2C_EEPROM_HIGH_ADDR,
    I2C_EEPROM_LOW_ADDR
};

//
// Globals
//
struct I2CMSG *CurrentMsgPtr;               // Used in interrupts
Uint16 PassCount;
Uint16 FailCount;
Uint16 Error;

//
// Main
//
void main(void)
{
    Uint16 Error;
    Uint16 i;

    CurrentMsgPtr = &I2cMsgOut1;

    //
    // Step 1. Initialize System Control:
    // PLL, WatchDog, enable Peripheral Clocks
    // This example function is found in the DSP2833x_SysCtrl.c file.
    //
    InitSysCtrl();

    //
    // Step 2. Initialize GPIO:
    // This example function is found in the DSP2833x_Gpio.c file and
    // illustrates how to set the GPIO to it's default state.
    //
    // InitGpio();

    //
    // Setup only the GP I/O only for I2C functionality
    //
    InitI2CGpio();

    //
    // Step 3. Clear all interrupts and initialize PIE vector table
    // Disable CPU interrupts
    //
    DINT;

    //
    // Initialize PIE control registers to their default state.
    // The default state is all PIE interrupts disabled and flags
    // are cleared.
    // This function is found in the DSP2833x_PieCtrl.c file.
    //
    InitPieCtrl();

    //
    // Disable CPU interrupts and clear all CPU interrupt flags
    //
    IER = 0x0000;
    IFR = 0x0000;

    //
    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    // This will populate the entire table, even if the interrupt
    // is not used in this example.  This is useful for debug purposes.
    // The shell ISR routines are found in DSP2833x_DefaultIsr.c.
    // This function is found in DSP2833x_PieVect.c.
    //
    InitPieVectTable();

    //
    // Interrupts that are used in this example are re-mapped to
    // ISR functions found within this file.
    //
    EALLOW;     // This is needed to write to EALLOW protected registers
//    PieVectTable.I2CINT1A = &i2c_int1a_isr;
    EDIS;   // This is needed to disable write to EALLOW protected registers

    //
    // Step 4. Initialize all the Device Peripherals:
    // This function is found in DSP2833x_InitPeripherals.c
    //
    // InitPeripherals(); // Not required for this example
    I2CA_Init();

    //
    // Step 5. User specific code
    //

    //
    // Clear Counters
    //
    PassCount = 0;
    FailCount = 0;

    //
    // Clear incoming message buffer
    //
    for (i = 0; i < I2C_MAX_BUFFER_SIZE; i++)
    {
        I2cMsgIn1.MsgBuffer[i] = 0x0000;
    }

    //
    // Enable interrupts required for this example
    //

//    //
//    // Enable I2C interrupt 1 in the PIE: Group 8 interrupt 1
//    //
//    PieCtrlRegs.PIEIER8.bit.INTx1 = 1;
//
//    //
//    // Enable CPU INT8 which is connected to PIE group 8
//    //
//    IER |= M_INT8;
//    EINT;
    init_LCD();
    DELAY_US(1000);

    //
    // Application loop
    //
    for(;;)
    {
        int a=0;
        //
        GpioDataRegs.GPBSET.bit.GPIO54 = 1 ; // Main LED
               //print_FVP();

               I2cMsgOut1.MsgBuffer[0]=0x83;
               Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
               DELAY_US(10000);
               for(a=0;a<5;a++)
               {
                   I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
                   Error=I2CA_WriteData(&I2cMsgOut3);
                   DELAY_US(1000);
               }
               I2cMsgOut1.MsgBuffer[0]=0xC3;
               Error=I2CA_WriteData(&I2cMsgOut1);//where to print r2c3
               DELAY_US(10000);
               for(a=0;a<5;a++)
               {
                   I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
                   Error=I2CA_WriteData(&I2cMsgOut3);
                   DELAY_US(1000);
               }
               I2cMsgOut1.MsgBuffer[0]=0x83;
               Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
               DELAY_US(10000);
               for(a=0;a<5;a++)
               {
                   I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
                   Error=I2CA_WriteData(&I2cMsgOut3);
                   DELAY_US(1000);
               }
               I2cMsgOut1.MsgBuffer[0]=0xC3;
               Error=I2CA_WriteData(&I2cMsgOut1);//where to print r2c3
               DELAY_US(10000);
               for(a=0;a<5;a++)
               {
                   I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
                   Error=I2CA_WriteData(&I2cMsgOut3);
                   DELAY_US(1000);
               }
               I2cMsgOut1.MsgBuffer[0]=0x83;
               Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
               DELAY_US(10000);
               for(a=0;a<5;a++)
               {
                   I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
                   Error=I2CA_WriteData(&I2cMsgOut3);
                   DELAY_US(1000);
               }
               I2cMsgOut1.MsgBuffer[0]=0xC3;
               Error=I2CA_WriteData(&I2cMsgOut1);//where to print r2c3
               DELAY_US(10000);
               for(a=0;a<5;a++)
               {
                   I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
                   Error=I2CA_WriteData(&I2cMsgOut3);
                   DELAY_US(1000);
               }

               GpioDataRegs.GPBTOGGLE.bit.GPIO51 = 1 ;//LED blinking
    }
}   // end of main

//
// I2CA_Init -
//
void
I2CA_Init(void)
{
    //
    // Initialize I2C
    //
    I2caRegs.I2CSAR = 0x3E; // Slave address - EEPROM control code

#if (CPU_FRQ_150MHZ)            // Default - For 150MHz SYSCLKOUT
    //
    // Prescaler - need 7-12 Mhz on module clk (150/15 = 10MHz)
    //
    I2caRegs.I2CPSC.all = 14;
#endif
#if (CPU_FRQ_100MHZ)            // For 100 MHz SYSCLKOUT
    //
    // Prescaler - need 7-12 Mhz on module clk (100/10 = 10MHz)
    //
    I2caRegs.I2CPSC.all = 9;
#endif

    I2caRegs.I2CCLKL = 10;      // NOTE: must be non zero
    I2caRegs.I2CCLKH = 5;       // NOTE: must be non zero
//    I2caRegs.I2CIER.all = 0x24;   // Enable SCD & ARDY interrupts

    //
    // Take I2C out of reset
    // Stop I2C when suspended
    //
    I2caRegs.I2CMDR.all = 0x0020;

    I2caRegs.I2CFFTX.all = 0x6000;  // Enable FIFO mode and TXFIFO
    I2caRegs.I2CFFRX.all = 0x2040;  // Enable RXFIFO, clear RXFFINT,

    return;
}

//
// I2CA_WriteData -
//
Uint16
I2CA_WriteData(struct I2CMSG *msg)
{
    Uint16 i;

    //
    // Wait until the STP bit is cleared from any previous master communication
    // Clearing of this bit by the module is delayed until after the SCD bit is
    // set. If this bit is not checked prior to initiating a new message, the
    // I2C could get confused.
    //
    if (I2caRegs.I2CMDR.bit.STP == 1)
    {
        return I2C_STP_NOT_READY_ERROR;
    }

    //
    // Setup slave address
    //
    I2caRegs.I2CSAR = msg->SlaveAddress;

    //
    // Check if bus busy
    //
    if (I2caRegs.I2CSTR.bit.BB == 1)
    {
        return I2C_BUS_BUSY_ERROR;
    }

    //
    // Setup number of bytes to send MsgBuffer + Address
    //
    I2caRegs.I2CCNT = msg->NumOfBytes;

    //
    // Setup data to send
    //
    //I2caRegs.I2CDXR = msg->MemoryHighAddr;
    I2caRegs.I2CDXR = msg->MemoryLowAddr;

//    for (i=0; i<msg->NumOfBytes; i++)
//    {
//        I2caRegs.I2CDXR = *(msg->MsgBuffer+i);
//    }
    I2caRegs.I2CDXR = *(msg->MsgBuffer);
    //
    // Send start as master transmitter
    //
    I2caRegs.I2CMDR.all = 0x6E20;

    return I2C_SUCCESS;
}

//
// I2CA_ReadData -
//
Uint16
I2CA_ReadData(struct I2CMSG *msg)
{
    //
    // Wait until the STP bit is cleared from any previous master communication.
    // Clearing of this bit by the module is delayed until after the SCD bit is
    // set. If this bit is not checked prior to initiating a new message, the
    // I2C could get confused.
    //
    if (I2caRegs.I2CMDR.bit.STP == 1)
    {
        return I2C_STP_NOT_READY_ERROR;
    }

    I2caRegs.I2CSAR = msg->SlaveAddress;

    if(msg->MsgStatus == I2C_MSGSTAT_SEND_NOSTOP)
    {
        //
        // Check if bus busy
        //
        if (I2caRegs.I2CSTR.bit.BB == 1)
        {
            return I2C_BUS_BUSY_ERROR;
        }
        I2caRegs.I2CCNT = 2;
        I2caRegs.I2CDXR = msg->MemoryHighAddr;
        I2caRegs.I2CDXR = msg->MemoryLowAddr;
        I2caRegs.I2CMDR.all = 0x2620;   // Send data to setup EEPROM address
    }
    else if(msg->MsgStatus == I2C_MSGSTAT_RESTART)
    {
        I2caRegs.I2CCNT = msg->NumOfBytes;  // Setup how many bytes to expect
        I2caRegs.I2CMDR.all = 0x2C20;       // Send restart as master receiver
    }

    return I2C_SUCCESS;
}

//
// i2c_int1a_isr - I2C-A
//

//
// pass -
//
void pass()
{
    __asm("   ESTOP0");
    for(;;);
}

//
// fail -
//
void fail()
{
    __asm("   ESTOP0");
    for(;;);
}

void init_LCD()//70.5ms total
{
    //init 3 times, function set
    int i;
    for(i=0;i<3;i++)
    {
        I2cMsgOut1.MsgBuffer[0]=0x28;
        Error=I2CA_WriteData(&I2cMsgOut1);
        DELAY_US(15000);
    }
    //display control
    I2cMsgOut1.MsgBuffer[0]=0x0C;
    Error=I2CA_WriteData(&I2cMsgOut1);
    DELAY_US(10000);
    //clear display
    I2cMsgOut1.MsgBuffer[0]=0x01;
    Error=I2CA_WriteData(&I2cMsgOut1);
    DELAY_US(12000);
    //entry mode set
    I2cMsgOut1.MsgBuffer[0]=0x06;
        Error=I2CA_WriteData(&I2cMsgOut1);
    DELAY_US(500);
    //set RGB reg mode 1, output, mode2
    I2cMsgOut2.MemoryLowAddr=0x00;
    I2cMsgOut2.MsgBuffer[0]=0x00;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    I2cMsgOut2.MemoryLowAddr=0x08;
    I2cMsgOut2.MsgBuffer[0]=0xFF;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    I2cMsgOut2.MemoryLowAddr=0x01;
    I2cMsgOut2.MsgBuffer[0]=0x20;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    //set RGB white
    I2cMsgOut2.MemoryLowAddr=0x04;
    I2cMsgOut2.MsgBuffer[0]=0x80;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    I2cMsgOut2.MemoryLowAddr=0x03;
    I2cMsgOut2.MsgBuffer[0]=0x80;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    I2cMsgOut2.MemoryLowAddr=0x02;
    I2cMsgOut2.MsgBuffer[0]=0x80;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);

}

void print_Format()
{
    int a;
    I2cMsgOut1.MsgBuffer[0]=0x81;
    Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c0
    DELAY_US(500);
    for(a=0;a<11;a++)
    {
        I2cMsgOut3.MsgBuffer[0]=I2C_Format1[a];
        Error=I2CA_WriteData(&I2cMsgOut3);
        //Error=I2CA_WriteData(I2C_LCD,0x40,I2C_Format1[a]);//
        DELAY_US(500);
    }
}

void print_N()
{
    int a;
    for(a=0;a<4;a++)
    {
        I2cMsgOut3.MsgBuffer[0]=I2C_N[a];
        Error=I2CA_WriteData(&I2cMsgOut3);
        //Error=I2CA_WriteData(I2C_LCD,0x40,I2C_N[a]);//
        DELAY_US(500);
    }
}


void print_S()
{
    int a;
    I2cMsgOut1.MsgBuffer[0]=0x01;
    Error=I2CA_WriteData(&I2cMsgOut1);//clear display
    DELAY_US(10000);
    I2cMsgOut1.MsgBuffer[0]=0x83;
        Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
    DELAY_US(500);
    for(a=0;a<5;a++)
    {
        I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
            Error=I2CA_WriteData(&I2cMsgOut3);
        DELAY_US(500);
    }
}


void print_FVP()
{
    if(num_call==0)
    {
        I2cMsgOut1.MsgBuffer[0]=0xC0;
        Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
    }
    else
    {
        I2cMsgOut3.MsgBuffer[0]=I2C_FVP[num_call-1];
            Error=I2CA_WriteData(&I2cMsgOut3);
    }

    num_call++;
    if(num_call==13)
        num_call=0;
}

//
// End of File
//

//###########################################################################
//
//
//###########################################################################
// $TI Release: F2833x/F2823x Header Files and Peripheral Examples V142 $
// $Release Date: November  1, 2016 $
// $Copyright: Copyright (C) 2007-2016 Texas Instruments Incorporated -
//             http://www.ti.com/ ALL RIGHTS RESERVED $
//###########################################################################

#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File



void   I2CA_Init(void);
//Uint16 I2CA_WriteData(Uint16 slave_add, Uint16 add, Uint16 data);
Uint16 I2CA_WriteData(struct I2CMSG *msg);
void init_LCD();
void print_S();//print �spark�
void print_Format();
void print_N();//print num of spark
void print_FVP();//print freq voltage and power

//
// defines
//
#define I2C_LCD               0x3E
#define I2C_RGB               0x60
#define I2C_NUMBYTES          2
#define NU                    0x00
#define I2C_Command           0x80
#define I2C_Data              0x40

// Globals
//
struct I2CMSG I2cMsgOut1=
{
    I2C_MSGSTAT_SEND_WITHSTOP,
    I2C_LCD,
    I2C_NUMBYTES,
    NU,
    I2C_Command,
    0x12,                   // Msg Byte 1
};
struct I2CMSG I2cMsgOut2=
{
    I2C_MSGSTAT_SEND_WITHSTOP,
    I2C_RGB,
    I2C_NUMBYTES,
    NU,
    I2C_Command,
    0x12,                   // Msg Byte 1
};
struct I2CMSG I2cMsgOut3=
{
    I2C_MSGSTAT_SEND_WITHSTOP,
    I2C_LCD,
    I2C_NUMBYTES,
    NU,
    I2C_Data,
    0x12,                   // Msg Byte 1
};

#define Iref_min            0
//#define Vref               500

// To keep track of which way the compare value is moving
#define EPWM_CMP_UP   1
#define EPWM_CMP_DOWN 0

#define lapse_set 1

Uint16 num_call=0;
Uint16 I2C_Format1[11]={'F',' ',' ',' ',' ','V',' ',' ',' ','P',' '};
//Uint16 I2C_Format2[9]={'P','=',' ',' ',' ','W',' ','N','='};
Uint16 I2C_Spark[5]={'S','P','A','R','K'};
Uint16 I2C_FVP[12]={'0','0','.','0',' ','0','0','0',' ','0','0','0'};// "00.0 000 000" ie 15.0(kHz) 450(V) 300(W)
Uint16 I2C_N[4]={0x30,0x30,0x30,0x30};// "0000" number of spark
Uint16 I2C_P[3]={0x30,0x30,0x30};



int condition=0;  // 0 for normal condition; 1 for issue condition
int loop = 1;
int i=0,iter=0,j=0;

int N_arc=0;
int Nsample=0; // counter for sample
int result;
long int fan_count=0;//monitor fan operation
long int temp_count=0;//monitor temp switch
int number_count=0;

Uint16 Error,I2C_Count=0;//i2C

int man_V=0;
Uint16 man_F=0;
Uint16 Fend=5000;

unsigned int lapse=1;
Uint16 flag1=0;//
Uint16 flag2=0;//

int sci_temp1,sci_temp2,sci_temp3;


void main(void)
 {
// Step 1. Initialize System Control:

// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2833x_SysCtrl.c file.
    InitSysCtrl();
    MemCopy(&RamfuncsLoadStart, &RamfuncsLoadEnd, &RamfuncsRunStart); // Must have this line for ram download to dsp
    InitFlash();

// Step 2. Initialize GPIO, ADC, SCI:


// This example function is found in the DSP2833x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
//   InitGpio();
//   InitGpio14_15();  // Gpio14 for relay1, Gpio15 for relay2


   InitI2CGpio();
   DELAY_US(1000);


   DELAY_US(1000);


//   scib_xmit(0x2E);


// Step 3. Clear all interrupts and initialize PIE vector table*****************************
// Disable CPU interrupts
   DINT;
// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2833x_PieCtrl.c file.
   InitPieCtrl();
   // Define ADCCLK clock frequency ( less than or equal to 25 MHz )
   // Assuming InitSysCtrl() has set SYSCLKOUT to 150 MHz
//   EALLOW;
//   SysCtrlRegs.HISPCP.all = 3; // Sysclkout/6=25MHz
//   EDIS;
// Disable CPU interrupts and clear all CPU interrupt flags:
   IER = 0x0000;
   IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.
   InitPieVectTable();

//   scib_xmit(0x3E);

   DELAY_US(10000);

// Step 4.  configure ePWM
// Synch controlling ePWM ***********************************************************
   I2CA_Init();//init I2C
//   scib_xmit(0x4E);


// Step 5. User specific code, enable interrupts:

   //init lcd
   init_LCD();
   DELAY_US(1000);
   //print_Format();//print Frequency format
   // Enable int1 which is connected to WAKEINT:


// Step 6. IDLE loop. Just sit and loop forever (optional):
   while (1)
  {
       int a=0;
       GpioDataRegs.GPBSET.bit.GPIO54 = 1 ; // Main LED
       //print_FVP();

       I2cMsgOut1.MsgBuffer[0]=0x83;
       Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
       DELAY_US(10000);
       for(a=0;a<5;a++)
       {
           I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
           Error=I2CA_WriteData(&I2cMsgOut3);
           DELAY_US(1000);
       }
       I2cMsgOut1.MsgBuffer[0]=0xC3;
       Error=I2CA_WriteData(&I2cMsgOut1);//where to print r2c3
       DELAY_US(10000);
       for(a=0;a<5;a++)
       {
           I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
           Error=I2CA_WriteData(&I2cMsgOut3);
           DELAY_US(1000);
       }
       I2cMsgOut1.MsgBuffer[0]=0x83;
       Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
       DELAY_US(10000);
       for(a=0;a<5;a++)
       {
           I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
           Error=I2CA_WriteData(&I2cMsgOut3);
           DELAY_US(1000);
       }
       I2cMsgOut1.MsgBuffer[0]=0xC3;
       Error=I2CA_WriteData(&I2cMsgOut1);//where to print r2c3
       DELAY_US(10000);
       for(a=0;a<5;a++)
       {
           I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
           Error=I2CA_WriteData(&I2cMsgOut3);
           DELAY_US(1000);
       }
       I2cMsgOut1.MsgBuffer[0]=0x83;
       Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
       DELAY_US(10000);
       for(a=0;a<5;a++)
       {
           I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
           Error=I2CA_WriteData(&I2cMsgOut3);
           DELAY_US(1000);
       }
       I2cMsgOut1.MsgBuffer[0]=0xC3;
       Error=I2CA_WriteData(&I2cMsgOut1);//where to print r2c3
       DELAY_US(10000);
       for(a=0;a<5;a++)
       {
           I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
           Error=I2CA_WriteData(&I2cMsgOut3);
           DELAY_US(1000);
       }

       GpioDataRegs.GPBTOGGLE.bit.GPIO51 = 1 ;//LED blinking
  }
}
 // main function end


void I2CA_Init(void)
{
   // Initialize I2C
   I2caRegs.I2CSAR = 0x003E;        // Slave address - EEPROM control code

   #if (CPU_FRQ_150MHZ)             // Default - For 150MHz SYSCLKOUT
        I2caRegs.I2CPSC.all = 14;   // Prescaler - need 7-12 Mhz on module clk (150/15 = 10MHz)
   #endif
   #if (CPU_FRQ_100MHZ)             // For 100 MHz SYSCLKOUT
     I2caRegs.I2CPSC.all = 9;       // Prescaler - need 7-12 Mhz on module clk (100/10 = 10MHz)
   #endif

   I2caRegs.I2CCLKL = 35;           // NOTE: must be non zero
   I2caRegs.I2CCLKH = 35;            // NOTE: must be non zero
//   I2caRegs.I2CIER.all = 0x24;      // Enable SCD & ARDY interrupts

   I2caRegs.I2CMDR.all = 0x0020;    // Take I2C out of reset
                                    // Stop I2C when suspended

   I2caRegs.I2CFFTX.all = 0x6000;   // Enable FIFO mode and TXFIFO
   I2caRegs.I2CFFRX.all = 0x2040;   // Enable RXFIFO, clear RXFFINT,
//   flag1=99;
   return;


}


Uint16 I2CA_WriteData(struct I2CMSG *msg)
{
//   Uint16 i;

   // Wait until the STP bit is cleared from any previous master communication.
   // Clearing of this bit by the module is delayed until after the SCD bit is
   // set. If this bit is not checked prior to initiating a new message, the
   // I2C could get confused.
   if (I2caRegs.I2CMDR.bit.STP == 1)
   {
      return I2C_STP_NOT_READY_ERROR;
   }

   // Setup slave address
   I2caRegs.I2CSAR = msg->SlaveAddress;

   // Check if bus busy
   if (I2caRegs.I2CSTR.bit.BB == 1)
   {
      return I2C_BUS_BUSY_ERROR;
   }

   // Setup number of bytes to send
   // MsgBuffer + Address
   I2caRegs.I2CCNT = msg->NumOfBytes;

   // Setup data to send
   I2caRegs.I2CDXR = msg->MemoryLowAddr;
   I2caRegs.I2CDXR = *(msg->MsgBuffer);

   // Send start as master transmitter
   I2caRegs.I2CMDR.all = 0x6E20;
   I2C_Count++;
   return I2C_SUCCESS;


}

void init_LCD()//70.5ms total
{
    //init 3 times, function set
    int i;
    for(i=0;i<3;i++)
    {
        I2cMsgOut1.MsgBuffer[0]=0x28;
        Error=I2CA_WriteData(&I2cMsgOut1);
        DELAY_US(15000);
    }
    //display control
    I2cMsgOut1.MsgBuffer[0]=0x0C;
    Error=I2CA_WriteData(&I2cMsgOut1);
    DELAY_US(10000);
    //clear display
    I2cMsgOut1.MsgBuffer[0]=0x01;
    Error=I2CA_WriteData(&I2cMsgOut1);
    DELAY_US(12000);
    //entry mode set
    I2cMsgOut1.MsgBuffer[0]=0x06;
        Error=I2CA_WriteData(&I2cMsgOut1);
    DELAY_US(500);
    //set RGB reg mode 1, output, mode2
    I2cMsgOut2.MemoryLowAddr=0x00;
    I2cMsgOut2.MsgBuffer[0]=0x00;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    I2cMsgOut2.MemoryLowAddr=0x08;
    I2cMsgOut2.MsgBuffer[0]=0xFF;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    I2cMsgOut2.MemoryLowAddr=0x01;
    I2cMsgOut2.MsgBuffer[0]=0x20;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    //set RGB white
    I2cMsgOut2.MemoryLowAddr=0x04;
    I2cMsgOut2.MsgBuffer[0]=0x80;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    I2cMsgOut2.MemoryLowAddr=0x03;
    I2cMsgOut2.MsgBuffer[0]=0x80;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
    I2cMsgOut2.MemoryLowAddr=0x02;
    I2cMsgOut2.MsgBuffer[0]=0x80;
        Error=I2CA_WriteData(&I2cMsgOut2);
    DELAY_US(500);
//    flag2=99;

}

void print_Format()
{
    int a;
    I2cMsgOut1.MsgBuffer[0]=0x81;
    Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c0
    DELAY_US(500);
    for(a=0;a<11;a++)
    {
        I2cMsgOut3.MsgBuffer[0]=I2C_Format1[a];
        Error=I2CA_WriteData(&I2cMsgOut3);
        //Error=I2CA_WriteData(I2C_LCD,0x40,I2C_Format1[a]);//
        DELAY_US(500);
    }
}

void print_N()
{
    int a;
    for(a=0;a<4;a++)
    {
        I2cMsgOut3.MsgBuffer[0]=I2C_N[a];
        Error=I2CA_WriteData(&I2cMsgOut3);
        //Error=I2CA_WriteData(I2C_LCD,0x40,I2C_N[a]);//
        DELAY_US(500);
    }
}


void print_S()
{
    int a;
    I2cMsgOut1.MsgBuffer[0]=0x01;
    Error=I2CA_WriteData(&I2cMsgOut1);//clear display
    DELAY_US(10000);
    I2cMsgOut1.MsgBuffer[0]=0x83;
        Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
    DELAY_US(500);
    for(a=0;a<5;a++)
    {
        I2cMsgOut3.MsgBuffer[0]=I2C_Spark[a];
            Error=I2CA_WriteData(&I2cMsgOut3);
        DELAY_US(500);
    }
}


void print_FVP()
{
    if(num_call==0)
    {
        I2cMsgOut1.MsgBuffer[0]=0xC0;
        Error=I2CA_WriteData(&I2cMsgOut1);//where to print r1c3
    }
    else
    {
        I2cMsgOut3.MsgBuffer[0]=I2C_FVP[num_call-1];
            Error=I2CA_WriteData(&I2cMsgOut3);
    }

    num_call++;
    if(num_call==13)
        num_call=0;
}

//===========================================================================
// No more.
//===========================================================================