EFM32 I2C startet nicht

include <stdio.h>

#include <stdlib.h>

#include "em_device.h"

#include "em_chip.h"

#include "em_cmu.h"

#include "em_emu.h"

#include "em_gpio.h"

#include "em_cmu.c"

#include "em_gpio.c"

#include "em_i2c.h"

static uint8_t BufA[2];

static uint8_t BufB[7];

volatile I2C_TransferReturn_TypeDef status;

static I2C_TransferSeq_TypeDef seq ={

    .addr = 0x80,

    .buf[0].data = BufA,

    .buf[1].data = BufB

};

static I2C_Init_TypeDef I2INIT={

    .clhr = i2cClockHLRStandard,

    .enable= true,

    .freq= I2C_FREQ_STANDARD_MAX,

    .master=true,

    .refFreq=false

};

void testwrite(){

    seq.buf[0].len=2; //send 2 bytes

    seq.buf[1].len=1; //receive 1 byte

    seq.buf[0].data[0]=0x84;

    seq.buf[0].data[1]=0xB8;

    seq.flags=I2C_FLAG_WRITE_READ;

    I2C_TransferInit(I2C0, &seq);

};

int main(void)

{

  /* Chip errata */

  CHIP_Init();

  CMU_OscillatorEnable(cmuOsc_HFRCO,1,0);

  CMU_ClockEnable(cmuClock_HFPER, true);

  CMU_ClockEnable(cmuClock_GPIO,1);

  CMU_ClockEnable(cmuClock_I2C0,1);

  //I2C Augänge  konfigurieren

  GPIO_PinModeSet(gpioPortD, 7, gpioModeWiredAndPullUpFilter, 1);

  GPIO_PinModeSet(gpioPortD, 6, gpioModeWiredAndPullUpFilter, 1);  

  I2C0->ROUTE = I2C_ROUTE_SDAPEN | I2C_ROUTE_SCLPEN | (1 << _I2C_ROUTE_LOCATION_SHIFT);

  //Sensor einschalten=

    GPIO_PinModeSet(gpioPortC, 8, gpioModePushPull , 1);

    GPIO_PinOutSet(gpioPortC,8);

  I2C_Init(I2C0,&I2INIT);

  while (1)

  {

    testwrite();

  GPIO_PinModeSet(5,5,gpioModePushPull,1);//test led

  GPIO_PinOutSet(5,5);

}

}