SIMPLELINK-CC2640R2-SDK: v4.10: i2ctmp driver example program reading TMP006 NRND?

Thanks.

No problem.

I am just suggesting the TMP007 because I assume most people would have the BOOSTXL-SENSORS. If the user don't have the BOOSTXL-BASSENSORS which has the tmp116, then this i2ctmp example program is useless for them.

I have no time to verify the multiplier for tmp006, but for tmp007 should be like this.

temperaturef = ((float)(temperature >> 2)) * 0.03125;

Anyway, I modified the i2ctmp to work for my BOOSTXL-SENSORS just for your reference here is the code.

#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>

/* Example/Board Header files */
#include "Board.h"

#define TASKSTACKSIZE       640

/*
 *  ======== TMP Registers ========
 */
#define TMP007_OBJ_TEMP     0x0003  /* OBJ Temp Result Register for TMP007 */
#define TMP007_ADDR         0x40;


static Display_Handle display;

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    uint16_t        sample;
    uint16_t        temperature;
    float           temperaturef;
    uint8_t         txBuffer[1];
    uint8_t         rxBuffer[2];
    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 TMP116_EN pin */
    GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);
#ifdef Board_GPIO_TMP116_EN
    GPIO_setConfig(Board_GPIO_TMP116_EN, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_HIGH);
    /* 1.5 ms reset time for the TMP116 */
    sleep(1);
#endif

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

    /* Turn on user LED */
    GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_ON);
    Display_printf(display, 0, 0, "Starting the i2ctmp example.");

    /* Create I2C for usage */
    I2C_Params_init(&i2cParams);
    i2cParams.bitRate = I2C_400kHz;
    i2c = I2C_open(Board_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  = 2;

    /* try TMP007*/
    txBuffer[0] = TMP007_OBJ_TEMP;
    i2cTransaction.slaveAddress = TMP007_ADDR;
    if (!I2C_transfer(i2c, &i2cTransaction)) {
        /* Could not resolve a sensor, error */
        Display_printf(display, 0, 0, "Error. No TMP sensor found!");
        while(1);
    }

    Display_printf(display, 0, 0, "Detected TMP007 sensor.");


    /* Take 20 samples and print them out onto the console */
    for (sample = 0; sample < 20; sample++) {
        if (I2C_transfer(i2c, &i2cTransaction)) {
            /*
             * Extract degrees C from the received data;
             * see TMP007 datasheet
             */
            temperature = (rxBuffer[0] << 8) | (rxBuffer[1]);
            temperaturef = ((float)(temperature >> 2)) * 0.03125;

            Display_printf(display, 0, 0, "Sample %u: %f (C)",
                sample, temperaturef);

        }
        else {
            Display_printf(display, 0, 0, "I2C Bus fault.");
        }

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

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

    return (NULL);
}

The recommended booster-pack is actually http://www.ti.com/tool/BP-BASSENSORSMKII right now (which has the TMP117 sensor featured). No matter what, you are quite right on the example being rather useless unless you have the actual sensors. I would consider it more of a CC32XX example and that it is there for other devices to showcase how the I2C driver works.

As for the conversion, (temp >> 2) * 0.03125 could also be written as temp / 4 * 0.03125 or temp * 0.0078125 :)