CC3220SF-LAUNCHXL: CC3200SF I2C

Dear Sir.

Thank you very much about i2ctmp006 example you point to me. It worked as expected without any problem.

I have questions about that code
1. Why I can't change slaveAddress : Board_TMP_ADDR; if I change something else other than Board_TMP_ADDR then status return false when do I2C_transfer();
2. When I removed two jumper which J2 and J3 about SDA and SCL then dead lock in I2C_transfer();
3. How to setup the I2C_open(Board_I2C0, &i2cParams); specially Board-I2C0

Below is test code.

Thanks in advance

Jason Liu

void *mainThread(void *arg0)
{
I2C_Handle i2c;
I2C_Params i2cParams;
I2C_Transaction i2cTransaction;
bool status;

unsigned char writeBuffer[3];
writeBuffer[0] = 0x55;
writeBuffer[1] = 0x55;
writeBuffer[2] = 0x55;

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

/* Configure the LED pin */
GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

/* 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 i2ctmp006 example\n");

/* Create I2C for usage */
I2C_Params_init(&i2cParams);
i2cParams.bitRate = I2C_400kHz;
i2c = I2C_open(Board_I2C0, &i2cParams);
if (i2c == NULL) {
Display_printf(display, 0, 0, "Error Initializing I2C\n");
while (1);
}
else {
Display_printf(display, 0, 0, "I2C Initialized!\n");
}

/* Point to the T ambient register and read its 2 bytes */

i2cTransaction.slaveAddress = Board_TMP_ADDR;
i2cTransaction.writeBuf = writeBuffer;
i2cTransaction.writeCount = 3;
i2cTransaction.readBuf = NULL;
i2cTransaction.readCount = 0;

status = I2C_transfer(i2c, &i2cTransaction);
if (!status)
{
Display_printf(display, 0, 0, "I2C_transfe error!\n");
}
else
{
Display_printf(display, 0, 0, "status true\n");
}

sleep(1);

/* Deinitialized I2C */
I2C_close(i2c);
Display_printf(display, 0, 0, "I2C closed!\n");

return (0);
}