[SOLVED] problem with I2C on dsPIC33FJ

// FBS
#pragma config BWRP = WRPROTECT_OFF     //  (Boot Segment may be written)
#pragma config BSS = NO_FLASH           // Boot Segment Program Flash Code Protection (No Boot program Flash segment)
#pragma config RBS = NO_RAM             // Boot Segment RAM Protection (No Boot RAM)

// FSS
#pragma config SWRP = WRPROTECT_OFF    // Secure Segment Program Write Protect (Secure segment may be written)
#pragma config SSS = NO_FLASH           // Secure Segment Program Flash Code Protection (No Secure Segment)
#pragma config RSS = NO_RAM             // Secure Segment Data RAM Protection (No Secure RAM)

// FGS
#pragma config GWRP = OFF               // General Code Segment Write Protect (User program memory is not write-protected)
#pragma config GSS = OFF                // General Segment Code Protection (User program memory is not code-protected)

// FOSCSEL
#pragma config FNOSC = PRI              // Oscillator Mode (Primary Oscillator (XT, HS, EC))
#pragma config IESO = OFF               // Internal External Switch Over Mode (Start-up device with user-selected oscillator source)

// FOSC
#pragma config POSCMD = HS              // Primary Oscillator Source (HS Oscillator Mode)
#pragma config OSCIOFNC = OFF           // OSC2 Pin Function (OSC2 pin has clock out function)
#pragma config IOL1WAY = ON             // Peripheral Pin Select Configuration (Allow Only One Re-configuration)
#pragma config FCKSM = CSECME           // Clock Switching and Monitor (Both Clock Switching and Fail-Safe Clock Monitor are enabled)

// FWDT
#pragma config WDTPOST = PS32768        // Watchdog Timer Postscaler (1:32,768)
#pragma config WDTPRE = PR128           // WDT Prescaler (1:128)
#pragma config WINDIS = OFF             // Watchdog Timer Window (Watchdog Timer in Non-Window mode)
#pragma config FWDTEN = OFF             // Watchdog Timer Enable (Watchdog timer enabled/disabled by user software)

// FPOR
#pragma config FPWRT = PWR128           // POR Timer Value (128ms)
#pragma config ALTI2C = ON              // Alternate I2C  pins (I2C mapped to ASDA1/ASCL1 pins)
#pragma config LPOL = OFF               // Motor Control PWM Low Side Polarity bit (PWM module low side output pins have active-low output polarity)
#pragma config HPOL = OFF               // Motor Control PWM High Side Polarity bit (PWM module high side output pins have active-low output polarity)
#pragma config PWMPIN = OFF             // Motor Control PWM Module Pin Mode bit (PWM module pins controlled by PWM module at device Reset)

// FICD
#pragma config ICS = PGD2               // Comm Channel Select (Communicate on PGC1/EMUC1 and PGD1/EMUD1)
#pragma config JTAGEN = OFF             // JTAG Port Enable (JTAG is Disabled)

int main() {
         //This function will initialize the I2C(1) peripheral.
	//First set the I2C(1) BRG Baud Rate.

	//Consult the dSPIC Data Sheet for information on how to calculate the
	//Baud Rate.

	I2C1BRG = 0x0007;//set to be 400khz

	//Now we will initialise the I2C peripheral for Master Mode, No Slew Rate
	//Control, and leave the peripheral switched off.

	I2C1CON = 0x1200;

	I2C1RCV = 0x0000;
	I2C1TRN = 0x0000;
	//Now we can enable the peripheral

	I2C1CON = 0x9200;

        I2C1CONbits.SEN = 1;		//Generate Start COndition
	while (I2C1CONbits.SEN);	//Wait for Start COndition
	
    while(1){
        while (I2C1STATbits.TRSTAT);	//Wait for bus to be idle
	I2C1TRN = 0x7f;				//Load byte to I2C1 Transmit buffer
	while (I2C1STATbits.TBF);		//wait for data transmission
       
        }
}