CC2640R2F: Integration of DS18B20 temperature probe with CC2640r2f microcontroller

Hello,

I'm trying to integrate the 1-wire protocol on the cc2640r2f micro-controller for the temperature sensor ds18b20.

I have gone through many of the forum posts and checked that the protocol needs to built using pin or gpio driver .

So with the Maxim integrated application note I have written the below code but i'm not able to get the required output.

uint8_t owire_reset(void)
{
    uint8_t result;
    vOutputMode();
    //DELAY_US(0);
    usleep(0);
    PIN_setPortOutputValue(hDqPin,board_low);
    //DELAY_US(480);
    usleep(480);
    PIN_setPortOutputValue(hDqPin,board_high);
    //delay_us(70);
    usleep(70);
    vInputMode();
    result=PIN_getInputValue(Board_I2C0_SDA1_ext);//^0x01;
    //delay_us(410);
    usleep(410);
    return result;
}

void ow_write_bit(char bit_1)
{
        vOutputMode();
        PIN_setPortOutputValue(hDqPin,board_low);
        //delay_us(60);
        if(bit_1==1)
            PIN_setPortOutputValue(hDqPin,board_high);
        usleep(104);
        PIN_setPortOutputValue(hDqPin,board_high);
}

uint8_t ow_read_bit(void)
{
    uint8_t result;

    vOutputMode();
    PIN_setPortOutputValue(hDqPin,board_low);
    //delay_us(6);
    //usleep(6);
    PIN_setPortOutputValue(hDqPin,board_high);
    //delay_us(9);
    usleep(15);
    vInputMode();
    result=PIN_getInputValue(Board_I2C0_SDA1_ext);// & 0x01;
    //delay_us(55);
    //usleep(55);
    return result;
}

void ow_write_byte(char data2)
{
    uint8_t loop,temp;

    for(loop=0;loop<8;loop++)
    {
        temp = data2>>loop;
        temp &= 0x01;
        ow_write_bit(temp);
    }
    usleep(104);
}

uint8_t ow_read_byte(void)
{
    uint8_t loop,result=0;

    for (loop = 0; loop < 8; loop++)
    {
        if (ow_read_bit())
            result |= 0x01<<loop;

        usleep(120);
    }
    return result;
}

void read_ext_temp(void)
{
    char get[10];
    uint8_t k;
    owire_reset();
    ow_write_byte(0xCC);
    ow_write_byte(0x44);
    usleep(104);
    owire_reset();
    ow_write_byte(0xCC);
    ow_write_byte(0xBE);
    for(k=0;k<9;k++)
        get[k]=ow_read_byte();
    temp_msb=get[1];
    temp_lsb=get[0];
    if(temp_msb<=0x80)
        temp_lsb=temp_lsb/2;
    temp_msb=temp_msb & 0x80;
    if(temp_msb>=0x80)
        temp_lsb=(~temp_lsb)+1;
    if(temp_msb>=0x80)
        temp_lsb=temp_lsb/2;
    if(temp_msb>=0x80)
        temp_lsb=((-1)*temp_lsb);
    temp_c=temp_lsb;
    //temp_f=(((int)temp_c)*9)/5+32;
}

void read_romcode(void)
{
    uint8_t n;
    owire_reset();
    ow_write_byte(0x33);
    for(n=0;n<8;n++)
        dat[n]=ow_read_byte();
}

void vOutputMode(void)
{
    PIN_close(hDqPin);
    hDqPin = PIN_open(&pinState, GPIO_OutLine);
//    GPIO_setConfig(Board_I2C0_SDA1_ext, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_OD_PU);
}

void vInputMode(void)
{
   PIN_close(hGpioPin);
    hDqPin = PIN_open(&pinState, GPIO_InLine);
//    GPIO_setConfig(Board_I2C0_SDA1_ext, GPIO_CFG_INPUT | GPIO_CFG_IN_PD);
}     

PIN_Config GPIO_OutLine[] =
{
 Board_I2C0_SDA1_ext  | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_INPUT_DIS | PIN_OPENDRAIN, /* DQ line initially off */
    PIN_TERMINATE                                                                      /* Terminate list */
};

PIN_Config GPIO_InLine[] =
{
 Board_I2C0_SDA1_ext  | PIN_INPUT_EN | PIN_PULLUP | PIN_GPIO_OUTPUT_DIS | PIN_HYSTERESIS,
    PIN_TERMINATE                                                                      /* Terminate list */
};

Can anybody help me with this issue.

Is it due to the micro-second delay or somewhere I'm going wrong.

Thanks.