CCS/TMS320F28335: problem in not receiving float values.

Part Number: TMS320F28335

Tool/software: Code Composer Studio

hi all, this is  my code of receiving float data in mailbox 1 .data which is receiving  has a float value. i am not getting whats wrong in this program that it is not receiving float value.at transmitting side i convert float value in char type and send it to mailbox5

#include "DSP2833x_Device.h"

// external function prototypes
extern void InitSysCtrl(void);
extern void InitPieCtrl(void);
extern void InitPieVectTable(void);
extern void InitCpuTimers(void);
extern void ConfigCpuTimer(struct CPUTIMER_VARS *, float, float);
extern void InitECan(void);


// Prototype statements for functions found within this file.
void Gpio_select(void);
interrupt void cpu_timer0_isr(void);

//###########################################################################
//						main code									
//###########################################################################

char temp[6];
void main(void)
{
	struct	ECAN_REGS ECanaShadow;		// local copy of CAN registers
	//Uint16 temp;

	InitSysCtrl();	// Basic Core Init from DSP2833x_SysCtrl.c

	EALLOW;
   	SysCtrlRegs.WDCR= 0x00AF;	// Re-enable the watchdog 
   	EDIS;			// 0x00AF  to NOT disable the Watchdog, Prescaler = 64

	Gpio_select();	// GPIO9, GPIO11, GPIO34 and GPIO49 as output
					// to 4 LEDs at Peripheral Explorer	

	/* Initialize the CAN module */
	// NOTE: first modify TI-file: InitECan() to 100kbps by setting BTR = 49
	InitECan();

	/* Write to Mailbox 1 message ID field		*/
   	ECanaMboxes.MBOX1.MSGID.all  = 0x10000000;  // extended identifier 
   	ECanaMboxes.MBOX1.MSGID.bit.IDE = 1;		 
    
	/* Configure Mailbox 1 as Receiver mailbox */
	ECanaShadow.CANMD.all = ECanaRegs.CANMD.all;	
	ECanaShadow.CANMD.bit.MD1 = 1;
	ECanaRegs.CANMD.all = ECanaShadow.CANMD.all; 

	/* Enable Mailbox 1  						*/
	ECanaShadow.CANME.all = ECanaRegs.CANME.all;	
	ECanaShadow.CANME.bit.ME1 = 1;
	ECanaRegs.CANME.all = ECanaShadow.CANME.all; 

	InitPieCtrl();		// basic setup of PIE table; from DSP2833x_PieCtrl.c
	
	InitPieVectTable();	// default ISR's in PIE

	EALLOW;
	PieVectTable.TINT0 = &cpu_timer0_isr;
	EDIS;

	InitCpuTimers();	// basic setup CPU Timer0, 1 and 2

	ConfigCpuTimer(&CpuTimer0,150,100000);

	PieCtrlRegs.PIEIER1.bit.INTx7 = 1;

	IER |=1;

	EINT;
	ERTM;

	CpuTimer0Regs.TCR.bit.TSS = 0;	// start timer0

	while(1)
	{    
	  		while(CpuTimer0.InterruptCount == 0);
			CpuTimer0.InterruptCount = 0;
			
			EALLOW;
			SysCtrlRegs.WDKEY = 0x55;	// service WD #1
			EDIS;

		    if(ECanaRegs.CANRMP.bit.RMP1 == 1 ) 	// valid new data in MBX1?
			{
			 	*temp = ECanaMboxes.MBOX1.MDL.byte.BYTE0;	// read message
				ECanaRegs.CANRMP.bit.RMP1 = 1;			// clear the status flag RMP1
														// and prepare MBX1 for next receive
				/*if(temp & 1) 								// update LED LD1
					GpioDataRegs.GPASET.bit.GPIO9 = 1;
				else
					GpioDataRegs.GPACLEAR.bit.GPIO9 = 1;
				if(temp & 2)								// update LED LD2
					GpioDataRegs.GPASET.bit.GPIO11 = 1;
				else
					GpioDataRegs.GPACLEAR.bit.GPIO11 = 1;
				if(temp & 4) 								// update LED LD3
					GpioDataRegs.GPBSET.bit.GPIO34 = 1;
				else
					GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1;
				if(temp & 8)								// update LED LD4
					GpioDataRegs.GPBSET.bit.GPIO49 = 1;
				else
					GpioDataRegs.GPBCLEAR.bit.GPIO49 = 1;*/
			}
	}
} 

void Gpio_select(void)
{
	EALLOW;
	GpioCtrlRegs.GPAMUX1.all = 0;		// GPIO15 ... GPIO0 = General Puropse I/O
	GpioCtrlRegs.GPAMUX2.all = 0;		// GPIO31 ... GPIO16 = General Purpose I/O
	GpioCtrlRegs.GPAMUX2.bit.GPIO30 = 1;	// CANA_RX
	GpioCtrlRegs.GPAMUX2.bit.GPIO31 = 1;	// CANA_TX

	GpioCtrlRegs.GPBMUX1.all = 0;		// GPIO47 ... GPIO32 = General Purpose I/O
	GpioCtrlRegs.GPBMUX2.all = 0;		// GPIO63 ... GPIO48 = General Purpose I/O
	GpioCtrlRegs.GPCMUX1.all = 0;		// GPIO79 ... GPIO64 = General Purpose I/O
	GpioCtrlRegs.GPCMUX2.all = 0;		// GPIO87 ... GPIO80 = General Purpose I/O
	 
	GpioCtrlRegs.GPADIR.all = 0;
	GpioCtrlRegs.GPADIR.bit.GPIO9 = 1;	// peripheral explorer: LED LD1 at GPIO9
	GpioCtrlRegs.GPADIR.bit.GPIO11 = 1;	// peripheral explorer: LED LD2 at GPIO11

	GpioCtrlRegs.GPBDIR.all = 0;		// GPIO63-32 as inputs

	GpioCtrlRegs.GPBDIR.bit.GPIO34 = 1;	// peripheral explorer: LED LD3 at GPIO34
	GpioCtrlRegs.GPBDIR.bit.GPIO49 = 1; // peripheral explorer: LED LD4 at GPIO49

	GpioCtrlRegs.GPCDIR.all = 0;		// GPIO87-64 as inputs
	EDIS;
}   

interrupt void cpu_timer0_isr(void)
{
	CpuTimer0.InterruptCount++;
	EALLOW;
	SysCtrlRegs.WDKEY = 0xAA;	// service WD #2
	EDIS;
	PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}


plz, tell me what wrong in this?