// TI File $Revision: /main/2 $
// Checkin $Date: July 30, 2009   18:45:25 $
//###########################################################################
//
// FILE:    Example_2833xSci_FFDLB.c
//
// TITLE:   DSP2833x Device SCI FIFO Digital Loop Back Test.
//
// ASSUMPTIONS:
//
//    This program requires the DSP2833x header files.
//
//    This program uses the internal loop back test mode of the peripheral.
//    Other then boot mode pin configuration, no other hardware configuration
//    is required.
//
//    As supplied, this project is configured for "boot to SARAM"
//    operation.  The 2833x Boot Mode table is shown below.
//    For information on configuring the boot mode of an eZdsp,
//    please refer to the documentation included with the eZdsp,
//
//       $Boot_Table:
//
//         GPIO87   GPIO86     GPIO85   GPIO84
//          XA15     XA14       XA13     XA12
//           PU       PU         PU       PU
//        ==========================================
//            1        1          1        1    Jump to Flash
//            1        1          1        0    SCI-A boot
//            1        1          0        1    SPI-A boot
//            1        1          0        0    I2C-A boot
//            1        0          1        1    eCAN-A boot
//            1        0          1        0    McBSP-A boot
//            1        0          0        1    Jump to XINTF x16
//            1        0          0        0    Jump to XINTF x32
//            0        1          1        1    Jump to OTP
//            0        1          1        0    Parallel GPIO I/O boot
//            0        1          0        1    Parallel XINTF boot
//            0        1          0        0    Jump to SARAM	    <- "boot to SARAM"
//            0        0          1        1    Branch to check boot mode
//            0        0          1        0    Boot to flash, bypass ADC cal
//            0        0          0        1    Boot to SARAM, bypass ADC cal
//            0        0          0        0    Boot to SCI-A, bypass ADC cal
//                                              Boot_Table_End$
//
// DESCRIPTION:
//
//    This test uses the loopback test mode of the SCI module to send
//    characters starting with 0x00 through 0xFF.  The test will send
//    a character and then check the receive buffer for a correct match.
//
//          Watch Variables:
//                LoopCount      Number of characters sent
//                ErrorCount     Number of errors detected
//                SendChar       Character sent
//                ReceivedChar   Character recieved
//
//
//###########################################################################
//
// Original Author: S.S.
//
// $TI Release: DSP2833x/DSP2823x C/C++ Header Files V1.31 $
// $Release Date: August 4, 2009 $
//###########################################################################

#include "DSP2833x_Device.h"
#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File
#include "define.h"
#include <math.h>
#include <string.h>

#define SCIB 1
#define boolen 1;

// Prototype statements for functions found within this file.
/*****************************************************************************
                    Ö¸ÁÊýÉùÃ÷
******************************************************************************/

//------------------------------------------------------UART1,-----------------------------------------------

void scib_loopback_init(void);
void scib_fifo_init(void);
void scib_xmit(unsigned char a);
void error();
interrupt void scib_rx_isr(void);

//delay time
void Delay_ms(long delay_time);

// Global counts used in this example
Uint16 LoopCount;
Uint16 ErrorCount;
unsigned int g_ReceiveFlag; 
int iLen;
Uint16 ReceiverData[15];
// These are defined by the linker (see F28335.cmd)
//extern Uint16 RamfuncsLoadStart;
//extern Uint16 RamfuncsLoadEnd;
//extern Uint16 RamfuncsRunStart;

void main(void)
{
    Uint16 SendChar;
    char *msg;
    Uint16 iStart;
   	Uint16 iCount; 
   	Uint16 iIndex;
   	//------------LCD SCREEN--------------------------------------------------------------
 
	g_ReceiveFlag=0x00;
	iLen=0;
	
	iStart=0x00;
//  Step 1. Initialize System Control registers, PLL, WatchDog, Clocks to default state:
//  This function is found in the DSP2833x_SysCtrl.c file.
	InitSysCtrl();
	//step 2
    InitSciGpio();
    
//  Disable and clear all CPU interrupts:// Step 3. Initialize PIE vector table:
	DINT;
	InitPieCtrl(); 
	IER = 0x0000;
	IFR = 0x0000;
	
	InitPieVectTable();
	EALLOW;
	
	PieVectTable.SCIRXINTA=&scib_rx_isr;
	EDIS;
	
    scib_fifo_init();	   // Initialize the SCI FIFO
    scib_loopback_init();  // Initalize SCI  	
  

// Step 4. Initialize all the Device Peripherals to a known state:
// This function is found in DSP2833x_InitPeripherals.c
   //InitPeripherals(); //skip this for SCI tests

// Step 5. User specific functions, Reassign vectors (optional), Enable Interrupts:
    

  
  //  PieCtrlRegs.PIECTRL.bit.ENPIE=1;
    PieCtrlRegs.PIEIER9.bit.INTx3=1;
    IER|=0x0100;//enable INT9
    EnableInterrupts();
    EINT;    //enable interruption
   // ERTM;  //ENABLE REAL INTERRUPTION
    SendChar = 0x00; 
 

   
    
	
//------------------------------------------------
 
   for(;;)
   {
   
  //---------------------------------------------interrupt receive 
 
  	while(g_ReceiveFlag==0x00)
   	{
   		Delay_ms(1);
   		
   	}
   
   	if(g_ReceiveFlag==1)
   	{
   		
   		for(iCount=0;iCount<iLen;iCount++)
   		{
   			SendChar=ReceiverData[iCount];
   			scib_xmit((unsigned char)SendChar);
   		//	ServoDog();
   			
   		}
   		if(iCount>0)
   		{
   			g_ReceiveFlag=0;
   			iLen=0;
   		}
   	}
      
       } 
   //---------------------------------------------------------------------------------
 
	
       

}


// Step 7. Insert all local Interrupt Service Routines (ISRs) and functions here:

void error()
{

      ErrorCount++;
//    asm("     ESTOP0");  // Uncomment to stop the test here
//    for (;;);

}

// Test 1,SCIA  DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parity
// Test 1,SCIB  DLB, 8-bit word, baud rate 9.6K, default, 1 STOP bit, no parity
void scib_loopback_init()
{
    // Note: Clocks were turned on to the SCIB peripheral
    // in the InitSysCtrl() function

 	ScibRegs.SCICCR.all =0x0007;   // 1 stop bit,  No loopback
                                   // No parity,8 char bits,
                                   // async mode, idle-line protocol
	ScibRegs.SCICTL1.all =0x0003;  // enable TX, RX, internal SCICLK,
                                   // Disable RX ERR, SLEEP, TXWAKE
	ScibRegs.SCICTL2.all =0x0003;
	ScibRegs.SCICTL2.bit.TXINTENA =1;
	ScibRegs.SCICTL2.bit.RXBKINTENA =1;
    ScibRegs.SCIHBAUD    =0x0000;
    ScibRegs.SCILBAUD    =0x0027;//baud rate 115200
	ScibRegs.SCICCR.bit.LOOPBKENA =1; // Disable loop back
	ScibRegs.SCICTL1.all =0x0023;     // Relinquish SCI from Reset
}


// Transmit a character from the SCI'
void scib_xmit(unsigned char a)
{
    ScibRegs.SCITXBUF=a;
}

// Initalize the SCI FIFO
void scib_fifo_init()
{
    ScibRegs.SCIFFTX.bit.TXFIFOXRESET=0;
    ScibRegs.SCIFFRX.bit.RXFIFORESET=0;

    ScibRegs.SCIFFTX.all=0xE040;
    ScibRegs.SCIFFRX.all=0x204f;
    ScibRegs.SCIFFCT.all=0x0;
  
}


//
void Delay_ms(long delay_time)
{
	long lCount=0;
	long delay1=1000;
	//delay_time=delay_time*1000;
	for(lCount=0;lCount<delay_time;lCount++)
	{
		ServiceDog();
	    DELAY_US(delay1);
	}
}






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

interrupt void scib_rx_isr()
{
     unsigned char rxData;
    
     rxData=ScibRegs.SCIRXBUF.all;
     iLen++; 
     
   
     ReceiverData[iLen-1]=rxData;
    
	if(iLen>0)
	{
		
		g_ReceiveFlag=1; 
	}
  
     PieCtrlRegs.PIEACK.all = 0x100;
     EINT ;
      
   }