c - XMC4400 and MAX44009 sensor light (I2C) -

i'm having trouble trying connect light sensor (max44009) i2c. explain i've done , hope can me.

i connecting connection card on hmi port of xmc4400 80 ports.

i've connected sensor according table. sca - pin37 scl - pin38 gnd - pin 80 3.3 - pin 3.3v of xmc4400

then i've tried adapt i2c master example (available on dave tutorials) light sensor. i've created i2c master app following settings:

my main.c this:

code:

#include <dave.h>            #define io_expander_address  (0x4a)   uint8_t tx_buffer[4] = {0x00,0x01,0x02,0x03};   volatile uint8_t tx_completion_0 = 0;  volatile uint8_t rx_completion_0 = 0;   /* transmit callback handling */  void tx_callback_0(void)  {    tx_completion_0 = 1;  }  /* receive callback handling */  void rx_callback_0(void)  {    rx_completion_0 = 1;  }  /* delay */  void delay(uint32_t counter)  {     volatile uint32_t cnt = counter;     while(--cnt);  }   /*   * demo  hmi satellite board xmc45 cpu board required.   * communicates io expander (u360: pca9502) found in mentioned satellite board.   * demo implements binary counter using leds attached io expander.   *   */  int main(void)  {    dave_init();    uint8_t received_data;   uint8_t counter = 0;    /* write data reset leds through io expander: dir , 0xff */   i2c_master_transmit(&i2c_master_0,true,io_expander_address,&tx_buffer[1],2,false);   while(tx_completion_0 == 0);   tx_completion_0 = 0;      while(counter < 255)   {      tx_buffer[3] = ~counter;     counter++;      /* write data set state of io expander */     i2c_master_transmit(&i2c_master_0,true,io_expander_address,&tx_buffer[3],2,false);     while(tx_completion_0 == 0){        tx_callback_0();      }     tx_completion_0 = 0;      /* receive data io expander */     i2c_master_receive(&i2c_master_0,true,io_expander_address,&received_data,2,true,true);     printf("%d", received_data);     while(rx_completion_0 == 0){         rx_callback_0();     }     rx_completion_0 = 0;     /* check if received  data correct*/     if(tx_buffer[3] != received_data)     {      // while(1);     }     /* delay make visible change */     delay(0xfffff);   }   while(1);   return 0;  } 

i think callback functions not working, since stops every time execute 1 i2c function. on case on line 108. plus, gives me error/warning:

no source available on 0x00.

import smbus import time  # i2c bus bus = smbus.smbus(1)  # max44009 address, 0x4a(74) # select configuration register, 0x02(02) #       0x40(64)    continuous mode, integration time = 800 ms bus.write_byte_data(0x4a, 0x02, 0x40)  time.sleep(0.5)  # max44009 address, 0x4a(74) # read data 0x03(03), 2 bytes # luminance msb, luminance lsb data = bus.read_i2c_block_data(0x4a, 0x03, 2)  # convert data lux exponent = (data[0] & 0xf0) >> 4 mantissa = ((data[0] & 0x0f) << 4) | (data[1] & 0x0f) luminance = ((2 ** exponent) * mantissa) * 0.045  # output data screen print "ambient light luminance : %.2f lux" %luminance 

i have python code works fine on sensor light when i'm using raspberry pi, i've tried same thing on xmc without success. hope can me.