3D_Hallsensor erfassen,I2C3 STM32F405

[Ma B. (drumstick)]

Guten Tag

Ich mache erste Schritte mit dem I2C-Bus des STM32F405 (Master) und 
setze die Standartlibary ein. Ich möchte die Werte der X-, Y- und 
Z-Achse des 3D_Hallsensors TLV493D-A1B6 (Slave) von Infineon erfassen. 
Dies funktioniert schon ordentlich.
Nur hängt sich der STM32F405-Prozessor von Zeit zur Zeit auf.
Ich habe einen Thread aufgesetzt der all 50ms auf den Bus bzw. den Slave 
anschreibt

void send_3D_Hall(void)
{
  I2C_start(I2C3, SLAVE_ADDRESS_3D_HALL_WRITE<<1, I2C_Direction_Transmitter);
  I2C_write(I2C3, CONFIG_3D_HALL_WRITE_RES1);
  I2C_write(I2C3, CONFIG_3D_HALL_WRITE_MOD1);
  I2C_write(I2C3, CONFIG_3D_HALL_WRITE_RES2);
  I2C_write(I2C3, CONFIG_3D_HALL_WRITE_MOD2);
  I2C_stop(I2C3);
}

Mittels Interrupt-Routine des I2C3_EV_IRQn - Handlers, starte ich den 
Lesezyklus:

void I2C3_EV_IRQHandler(void)
{
  NVIC_DisableIRQ(I2C3_EV_IRQn);
  receive_3D_Hall();
  NVIC_EnableIRQ(I2C3_EV_IRQn);
}

void receive_3D_Hall(void)
{
    I2C_start(I2C3, SLAVE_ADDRESS_3D_HALL_READ<<1, I2C_Direction_Receiver); 
    received_data[0]   = I2C_read_ack(I2C3); 
    received_data[1]   = I2C_read_ack(I2C3); 
    received_data[2]  = I2C_read_ack(I2C3); 
    received_data[3]   = I2C_read_ack(I2C3); 
    received_data[4]   = I2C_read_ack(I2C3); 
    received_data[5]  = I2C_read_ack(I2C3); 
    received_data[6]   = I2C_read_ack(I2C3); 
    received_data[7]   = I2C_read_ack(I2C3); 
    received_data[8]  = I2C_read_ack(I2C3); 
    received_data[9]   = I2C_read_nack(I2C3);
    trans_Data_3D_Hall();
}

Hier noch die Werte für die Mod1 und Mod2 Register des Sensors

#define CONFIG_3D_HALL_WRITE_RES1        0x00
#define CONFIG_3D_HALL_WRITE_MOD1        0x07
#define CONFIG_3D_HALL_WRITE_RES2        0x00
#define CONFIG_3D_HALL_WRITE_MOD2        0x40

Und hier die Init des I2C3:

void D3_Hall_i2c_Init(void)
{
  I2C_InitTypeDef I2C_InitStructure;
  
  NVIC_InitTypeDef   NVIC_InitStructure;

  NVIC_InitStructure.NVIC_IRQChannel                     = I2C3_EV_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority   = 0x05;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority         = 0x01;
  NVIC_InitStructure.NVIC_IRQChannelCmd                 = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  NVIC_EnableIRQ(I2C3_EV_IRQn);   
  
  D3_Hall_i2c_Init_LowLewel();
  
  I2C_InitStructure.I2C_ClockSpeed           = 1000000;
  I2C_InitStructure.I2C_Mode                 = I2C_Mode_I2C;
  I2C_InitStructure.I2C_DutyCycle            = I2C_DutyCycle_2;
  I2C_InitStructure.I2C_OwnAddress1          = 0x00;
  I2C_InitStructure.I2C_Ack                  = ENABLE;
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_Init(I2C3, &I2C_InitStructure);
  I2C_ITConfig(I2C3, I2C_IT_EVT, ENABLE);
  I2C_Cmd(I2C3, ENABLE);
}

Ich habe keine anderen Interrupts am laufen. Hat jemand eine Idee?
Vielen Dank schon mal!

[Ma B. (drumstick)]

Mittels debuggen sehe ich, dass die Abstände, in denen sich der 
Prozessor aufhängt sehr unterschiedlich sind. Er bleibt an verschiedenen 
Stellen hängen.