Compiler/LAUNCHCC3220MODASF: I2C initialization failed

Hey SAGAR,

I reviewed your code and here is the reason your I2C transfer params its in blocking and not Callback mode so your I2C transfer calls were all being blocked so switch the transfer modes, however that will not full fix the problem you also need to added a callback function to your I2C to call your transfer function otherwise your value will be zero. I attached the fix down below; also there is a simpler way to replicate this without callbacks just add a sleep call (if not already added) and an infinite while loop (where the for loop is) to the tempature example.

Code :
#include <stdint.h>
#include <stddef.h>
#include <unistd.h>
#include <stdio.h>

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

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

#define TMP006_DIE_TEMP 0x0001 /* Die Temp Result Register*/

unsigned int i = NULL;
uint16_t temperature;
uint8_t txBuffer[1];
uint8_t rxBuffer[2];
I2C_Handle i2c;
I2C_Params i2cParams;
I2C_Transaction i2cTransaction;
Timer_Handle timer0;
Timer_Params params;


void timerCallback();

void *mainThread(void *arg0){

GPIO_init();
Timer_init();
I2C_init();

GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_OFF);

txBuffer[0] = TMP006_DIE_TEMP;
i2cTransaction.slaveAddress = Board_TMP_ADDR;
i2cTransaction.writeBuf = txBuffer;
i2cTransaction.writeCount = 1;
i2cTransaction.readBuf = rxBuffer;
i2cTransaction.readCount = 2;



Timer_Params_init(&params);
params.period = 1500000;
params.periodUnits = Timer_PERIOD_US;
params.timerMode = Timer_CONTINUOUS_CALLBACK;
params.timerCallback = timerCallback;

timer0 = Timer_open(Board_TIMER0, &params);

if (timer0 == NULL)
{

while (1)
;
}

if (Timer_start(timer0) == Timer_STATUS_ERROR)
{

while (1)
;
}

return(0);
}
void transferCallbackFxn(I2C_Handle handle, I2C_Transaction *transaction, bool transferStatus){ // for I2C Callback



if (transferStatus) {

temperature = (rxBuffer[0] << 6) | (rxBuffer[1] >> 2);

if (rxBuffer[0] & 0x80)
{
temperature |= 0xF000;
}

temperature /= 32;

printf("Sample %d (C)\n", temperature);
}

else
{
printf("I2C Bus fault\n");
}

I2C_close(i2c);
printf("I2C closed!\n");
}
void timerCallback()
{

I2C_Params_init(&i2cParams);
i2cParams.bitRate = I2C_400kHz;
i2cParams.transferMode = I2C_MODE_CALLBACK; //Switched
i2cParams.transferCallbackFxn = transferCallbackFxn; // Add this
i2c = I2C_open(Board_I2C_TMP, &i2cParams);

if (i2c == NULL)
{
printf("Error Initializing I2C\n");
while (1)
;
}
else
{
printf("I2C Initialized!\n");
}

I2C_transfer(i2c, &i2cTransaction);
}

 
 
Have a wonderful day.

Sincerely,
Tyisheam J.