LPSTK-CC1352R: HDC2080 returns zero only with i2ctmp example

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 * Copyright (c) 2018-2022, Texas Instruments Incorporated
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 */

/*
 *  ======== i2ctmp.c ========
 */
#include <stdint.h>
#include <stddef.h>
#include <unistd.h>

/* Driver Header files */
#include <ti/drivers/GPIO.h>
#include <ti/drivers/I2C.h>
#include <ti/display/Display.h>

/* Driver configuration */
#include "ti_drivers_config.h"

//#include <ti/sail/hdc2010/hdc2010.h>

#define TASKSTACKSIZE 640

/* Temperature result registers */
#define TMP11X_RESULT_REG 0x0000

/* I2C slave addresses */
#define TMP11X_BASSENSORS_ADDR 0x40
#define TMP116_LAUNCHPAD_ADDR  0x41

/* Number of supported sensor iterations */
#define TMP_COUNT 2

/*
 * Data structure containing currently supported I2C TMP sensors.
 * Sensors are ordered by descending preference.
 */
static const struct
{
    uint8_t address;
    uint8_t resultReg;
    char *id;
} sensors[TMP_COUNT] = {{TMP11X_BASSENSORS_ADDR, TMP11X_RESULT_REG, "11X"},
                        {TMP116_LAUNCHPAD_ADDR, TMP11X_RESULT_REG, "116"}};

static uint8_t slaveAddress;
static Display_Handle display;

static void i2cErrorHandler(I2C_Transaction *transaction, Display_Handle display);

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    uint16_t sample;
    int16_t temperature;
    uint8_t txBuffer[1];
    uint8_t rxBuffer[2];
    int8_t i;
    I2C_Handle i2c;
    I2C_Params i2cParams;
    I2C_Transaction i2cTransaction;

    /* Call driver init functions */
    Display_init();
    GPIO_init();
    I2C_init();

    /* Configure the LED and if applicable, the TMP_EN pin */
    GPIO_setConfig(CONFIG_GPIO_LED_0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);
#ifdef CONFIG_GPIO_TMP_EN
    GPIO_setConfig(CONFIG_GPIO_TMP_EN, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_HIGH);
    /* Allow the sensor to power on */
    sleep(1);
#endif

    /* Open the UART display for output */
    display = Display_open(Display_Type_UART, NULL);
    if (display == NULL)
    {
        while (1) {}
    }

    /* Turn on user LED */
    GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_ON);
    Display_printf(display, 0, 0, "Starting the i2ctmp example\n");

    /* Create I2C for usage */
    I2C_Params_init(&i2cParams);
    i2cParams.bitRate = I2C_100kHz;
    i2c               = I2C_open(CONFIG_I2C_TMP, &i2cParams);
    if (i2c == NULL)
    {
        Display_printf(display, 0, 0, "Error Initializing I2C\n");
        while (1) {}
    }
    else
    {
        Display_printf(display, 0, 0, "I2C Initialized!\n");
    }

    /* Common I2C transaction setup */
    i2cTransaction.writeBuf   = txBuffer;
    i2cTransaction.writeCount = 1;
    i2cTransaction.readBuf    = rxBuffer;
    i2cTransaction.readCount  = 0;

    /*
     * Determine which I2C sensors are present by querying known I2C
     * slave addresses.
     */
    for (i = TMP_COUNT - 1; i >= 0; i--)
    {
        i2cTransaction.slaveAddress = sensors[i].address;
        txBuffer[0]                 = sensors[i].resultReg;

        if (I2C_transfer(i2c, &i2cTransaction))
        {
            slaveAddress = sensors[i].address;
            Display_printf(display,
                           0,
                           0,
                           "Detected TMP%s sensor with slave"
                           " address 0x%x",
                           sensors[i].id,
                           sensors[i].address);
        }
        else
        {
            i2cErrorHandler(&i2cTransaction, display);
        }
    }

    /* If we never assigned a slave address */
    if (slaveAddress == 0)
    {
        Display_printf(display, 0, 0, "Failed to detect a sensor!");
        I2C_close(i2c);
        while (1) {}
    }

    Display_printf(display, 0, 0, "\nUsing last known sensor for samples.");
    i2cTransaction.slaveAddress = slaveAddress;

    /* Take 20 samples and print them out onto the console */
    i2cTransaction.readCount = 4;
    for (sample = 0; sample < 20; sample++)
    {
        if (I2C_transfer(i2c, &i2cTransaction))
        {
            /*
             * Extract degrees C from the received data;
             * see TMP sensor datasheet
             */
            temperature = rxBuffer[0] ;
            Display_printf(display, 0, 0, "Sample %d ",temperature);
            temperature = (temperature << 8) | (rxBuffer[1]);


            //temperature *= 0.0078125;
            float f =temperature;
            f = ((f * 165.0f) / 65536.0f) - 40.0f;

            int16_t humidity = rxBuffer[2];
            humidity = (humidity << 8) | rxBuffer[3];
            float H = humidity;
            H = (H/65536.0) * 100.0;

            Display_printf(display, 0, 0, "Sample %u: %0.2f (C), %0.2f ", sample, f,H);
        }
        else
        {
            i2cErrorHandler(&i2cTransaction, display);
        }

        /* Sleep for 1 second */
        sleep(1);
    }

    I2C_close(i2c);
    Display_printf(display, 0, 0, "I2C closed!");

    return (NULL);
}

/*
 *  ======== i2cErrorHandler ========
 */
static void i2cErrorHandler(I2C_Transaction *transaction, Display_Handle display)
{
    switch (transaction->status)
    {
        case I2C_STATUS_TIMEOUT:
            Display_printf(display, 0, 0, "I2C transaction timed out!");
            break;
        case I2C_STATUS_CLOCK_TIMEOUT:
            Display_printf(display, 0, 0, "I2C serial clock line timed out!");
            break;
        case I2C_STATUS_ADDR_NACK:
            Display_printf(display,
                           0,
                           0,
                           "I2C slave address 0x%x not"
                           " acknowledged!",
                           transaction->slaveAddress);
            break;
        case I2C_STATUS_DATA_NACK:
            Display_printf(display, 0, 0, "I2C data byte not acknowledged!");
            break;
        case I2C_STATUS_ARB_LOST:
            Display_printf(display, 0, 0, "I2C arbitration to another master!");
            break;
        case I2C_STATUS_INCOMPLETE:
            Display_printf(display, 0, 0, "I2C transaction returned before completion!");
            break;
        case I2C_STATUS_BUS_BUSY:
            Display_printf(display, 0, 0, "I2C bus is already in use!");
            break;
        case I2C_STATUS_CANCEL:
            Display_printf(display, 0, 0, "I2C transaction cancelled!");
            break;
        case I2C_STATUS_INVALID_TRANS:
            Display_printf(display, 0, 0, "I2C transaction invalid!");
            break;
        case I2C_STATUS_ERROR:
            Display_printf(display, 0, 0, "I2C generic error!");
            break;
        default:
            Display_printf(display, 0, 0, "I2C undefined error case!");
            break;
    }
}