why below code give me .o error 1 ?

[Qt embedded developer]

#include "st25dv-i2c_linux.h"
#include <fcntl.h>
#include <stdio.h>
#include <time.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>

#include <linux/i2c-dev.h>
#include <sys/ioctl.h>
#include <linux/i2c.h>

#include "st25dv-i2c_linux.h"
#include "unistd.h"
#include "stdlib.h"

#include "hwconfig.h"
#include "st25dv.h"
st25dvi2c_linux::st25dvi2c_linux()
{

}

/** @addtogroup ST25DV_I2C_BSP

• @{
• @brief <b>This file contains the BSP IO layer for the ST25DV-I2C</b>
  */

#define REVERSE16(x) ((X >> 8) | ((X & 0xFF) << 8))
static int filehandle;

/** @defgroup ST25DV_I2C_BSP_IO_Private_Functions

• @{
  /
  /#define ST25DVI2C_DBG_ENABLE 1*/

/**

• @}
  */

/** @defgroup ST25DV_I2C_BSP_IO_Public_Functions

• @{
  */

/******************************** LINK NFC *******************************/
uint32_t ts2milisec(struct timespec ts)
{
return ((ts->tv_sec * (uint32_t)1000) + (ts->tv_nsec/1000000));
}

/**

• @brief Tick function used in NFC device low level driver.
• @retval Current Tick
  */
  int32_t NFC_IO_Tick(void)
  {
  struct timespec cur_ts;
  clock_gettime(CLOCK_MONOTONIC, &cur_ts);
  return ts2milisec(&cur_ts);
  }

/**

• @brief DeInitializes Sensors low level.
• @retval Status Success (0), Error (1)
  */
  int32_t NFC_IO_DeInit(void)
  {
  if(close(filehandle) < 0)
  {
  // printf(" Error Can't close /dev/i2c-x%\n");
  exit(1);
  }
  return 0;
  }

/**

• @brief Initializes Sensors low level.
• @retval Status Success (0), Error (1)
  */
  int32_t NFC_IO_Init(void)
  {

static char filename[20];
static int adapter_nr = 2;

snprintf(filename, 19, "/dev/i2c-%d", adapter_nr);
filehandle = open(filename,O_RDWR);
if (filehandle < 0) {
printf("Error : Can't open /dev/i2c-%d\n",adapter_nr);
/* ERROR HANDLING; you can check errno to see what went wrong */
exit(1);
}

return 0;
}

/**

• @brief Checks if target device is ready for communication.
• @param Addr NFC device I2C address
• @param Trials Number of trials
• @retval Status Success (0), Timeout (1)
  /
  int32_t NFC_IO_IsDeviceReady(uint16_t DevAddr, uint32_t Trials)
  {
  uint32_t tickstart = 0;
  uint32_t currenttick = 0;
  int8_t ret = -8;
  uint8_t regAddr[2] = {0,0};
  uint8_t pData[1];
  #ifdef ST25DVI2C_DBG_ENABLE
  printf("NFC_IO_IsDeviceReady(%x,%d)\r\n",DevAddr,Trials);
  #endif
  usleep(1000);
  #ifdef ST25DVI2C_DBG_ENABLE
  / Get tick */
  tickstart = NFC_IO_Tick();
  printf("time = %d\r\n",tickstart);
  #endif
  struct i2c_msg messages[2] = {
  {
  .addr = DevAddr >>1,
  .buf = regAddr,
  .len = 2,
  .flags = 0,
  },
  {
  .addr = DevAddr >>1,
  .buf = pData,
  .len = 1,
  .flags = I2C_M_RD | I2C_M_NOSTART,
  }
  };

struct i2c_rdwr_ioctl_data payload = {
.msgs = messages,
.nmsgs = 2,
};
ret = ioctl(filehandle, I2C_RDWR, &payload);

#ifdef ST25DVI2C_DBG_ENABLE
printf("time = %d ret=%d\r\n",NFC_IO_Tick(),ret);
#endif
if (ret < 0)
{
return NFC_I2C_ERROR_TIMEOUT;
}

return NFC_I2C_STATUS_SUCCESS;
}

/**

• @brief Write a value in a register of the device through BUS.

• @param DevAddr Device address on Bus.

• @param Reg The target register address to write

• @param pData Pointer to data buffer to write

• @param Length Data Length (max is 256)

• @retval Status Success (0), Linux errno
  */

int32_t NFC_IO_WriteReg16(uint16_t DevAddr, uint16_t Reg, uint8_t *pData, uint16_t Length)
{
int8_t ret = -8;
uint8_t buffer[258];

if(Length > 256)
{
printf("ERROR NFC_IO_WriteReg16 Length is too big %d\r\n",Length);
return -1;
}

#ifdef ST25DVI2C_DBG_ENABLE
printf("NFC_IO_WriteReg16(%x,%x,%x,%d)\r\n",DevAddr,Reg,pData,Length);
for (int i = 0 ; i < Length ; i++)
printf("%x ",pData[i]);
printf("\n");
printf("time = %d\r\n",NFC_IO_Tick());
#endif

/* Prepare tx buffer */
buffer[0] = Reg>>8;
buffer[1] = Reg & 0xFF;
memcpy(&buffer[2],pData,Length);

struct i2c_msg messages[1] = {
{
.addr = DevAddr >>1,
.buf = buffer,
.len = Length + 2,
.flags = 0,
}
};

struct i2c_rdwr_ioctl_data payload = {
.msgs = messages,
.nmsgs = 1,
};

ret = ioctl(filehandle, I2C_RDWR, &payload);
if (ret < 0) {
    /* Workaround as Linux doesnt return any specific error code for NACK */
    /* ST25DV-I2C NACK when writing ENDAx registers*/
    if((DevAddr == ST25DV_ADDR_SYST_I2C) &&
        ((Reg == ST25DV_ENDA2_REG) || (Reg == ST25DV_ENDA3_REG)) &&
        (errno == ENXIO))
    {
        /* this value is the expected error code for a NACK */
        ret = -102;
    } else {
        ret = -errno;
        printf("\r\nError %d while writing @%X (devAddr=%X)\r\n", ret,Reg,DevAddr);
    }
    return ret;
}

/* todo check return status for nack detection /
/ return NFC_I2C_ERROR_NACK; */

return NFC_I2C_STATUS_SUCCESS;
}

/**

• @brief Read registers through a bus (16 bits)
• @param DevAddr: Device address on BUS
• @param Reg: The target register address to read
• @param Length Data Length
• @retval Status Success (0), Error (1)
  */
  int32_t NFC_IO_ReadReg16(uint16_t DevAddr, uint16_t Reg, uint8_t *pData, uint16_t Length)
  {
  int8_t ret = -8;
  uint8_t regAddr[2];
  regAddr[0] = Reg>>8;
  regAddr[1] = Reg & 0xFF;

#ifdef ST25DVI2C_DBG_ENABLE
printf("NFC_IO_ReadReg16(%x,%x,%x,%d)\r\n",DevAddr,Reg,pData,Length);
#endif
struct i2c_msg messages[2] = {
{
.addr = DevAddr >>1,
.buf = regAddr,
.len = 2,
.flags = 0,
},
{
.addr = DevAddr >>1,
.buf = pData,
.len = Length,
.flags = I2C_M_RD | I2C_M_NOSTART,
}
};

struct i2c_rdwr_ioctl_data payload = {
.msgs = messages,
.nmsgs = 2,
};

ret = ioctl(filehandle, I2C_RDWR, &payload);
if (ret < 0) {
    ret = -errno;
    printf("\r\nError %d while reading @%X (devAddr=%X)\r\n", ret,Reg,DevAddr);
    return ret;
}

/* todo check return status for nack detection /
/ return NFC_I2C_ERROR_NACK; */
#ifdef ST25DVI2C_DBG_ENABLE
printf("NFC_IO_ReadReg16 OK\r\n");
for (int i = 0 ; i < Length ; i++)
printf("%x ",pData[i]);
printf("\n");
#endif
return NFC_I2C_STATUS_SUCCESS;

}

[jsulm]

@Qt-embedded-developer Please post exact error message...
Also, how is this code related to Qt?

[JonB]

@Qt-embedded-developer
In addition to @jsulm, did you make any effort to reduce the size of your code to find a minimal which reproduces the error, or did you not bother?

[Qt embedded developer]

Because proper file are not added so i created new project and linked all file properly that resolve my error