How to use I2C with CC2640

Well... those topics do not solve my problems.

Lets start with simple questions. And built my project until communication is established between CC2640 and AS3701B (I want to connect those 2 HW modules via I2C).

About initialization.

Shall I modify existing BoardGpioInitTable? Or shall I create my own InitTable? Is it allowed to have 2 initializations?

I want to write to register located at address 0x09, value 0x74.  This is part of my code:

void myInitPmu(void)

{

 bool retVal;

 uint8_t buffer[2];

 buffer[0]=0x09;  // register address

 buffer[1]=0x74;  // value which needs to be written in specified register

 retVal = bspI2cWrite(buffer,2);

}

But, during compilation, I got an error:

unresolved symbol I2C_transfer, first referenced in <whole-program> 

I see that function "bspI2cWrite" is calling "I2C_transfer". 

You have to add I2C.c, I2c.h, I2CCC26XX.c, and I2CCC26XX.h into SimpleBLEPeripherial.

I added those includes in the same file where I send command to write into register. But the same error occured.

#include "bsp_i2c.h"

#include <ti/drivers/i2c/I2CCC26XX.h>

#include <ti/drivers/I2C.h>

...

void myInitPmu(void)

{

 bool retVal;

 uint8_t buffer[2];

 buffer[0]=0x09;  // register address

 buffer[1]=0x74;  // value which needs to be written in specified register

 retVal = bspI2cWrite(buffer,2);

}

unresolved symbol I2C_transfer, first referenced in <whole-program>

I attach my example with I2C for your reference.

8715.SimpleBLEPeripheral.zip

Thank you for example code. I compare it with my code, and do following:

1) add into "init" function

bool retVal;
uint8_t buffer[2];

buffer[0]=0x09; // register address
buffer[1]=0x74; // value which needs to be written in specified register
retVal = bspI2cWrite(buffer,2);

2) added into Board.c

* ============================= I2C Begin=====================================
*/
/* Place into subsections to allow the TI linker to remove items properly */
#if defined(__TI_COMPILER_VERSION__)
#pragma DATA_SECTION(I2C_config, ".const:I2C_config")
#pragma DATA_SECTION(i2cCC26xxHWAttrs, ".const:i2cCC26xxHWAttrs")
#endif

/* Include drivers */
#include <ti/drivers/i2c/I2CCC26XX.h>

/* I2C objects */
I2CCC26XX_Object i2cCC26xxObjects[CC2650_I2CCOUNT];

/* I2C configuration structure, describing which pins are to be used */
const I2CCC26XX_HWAttrs i2cCC26xxHWAttrs[CC2650_I2CCOUNT] = {
{
.baseAddr = I2C0_BASE,
.intNum = INT_I2C,
.powerMngrId = PERIPH_I2C0,
.sdaPin = MyBoard_I2C0_SDA0,
.sclPin = MyBoard_I2C0_SCL0,
}
};

const I2C_Config I2C_config[] = {
{&I2CCC26XX_fxnTable, &i2cCC26xxObjects[0], &i2cCC26xxHWAttrs[0]},
{NULL, NULL, NULL}
};
/*
* ========================== I2C end =========================================
*/

3) added into Board.h

#define MyBoard_I2C0_SDA0 IOID_0
#define MyBoard_I2C0_SCL0 IOID_1

And the error is the same.

unresolved symbol I2C_transfer, first referenced in <whole-program> 

Since I don't use CCS, Let's go back to your latest problem using your own modification on CCS.

unresolved symbol I2C_transfer, first referenced in <whole-program>

This error should be caused by I2C.c not added correct into your CCS project. Please check this again.

I add I2C into SimplePeripheral CCS project for your reference.

1325.SimpleBLEPeripheral.zip

Finally, I managed to find a solution.

I need to create directory "I2C" in my CCS project structure.

Than I added link to following files in that same directory ("I2C"):

C:\TI\tirtos_simplelink_2_11_01_09\packages\ti\drivers\I2C.c

C:\TI\tirtos_simplelink_2_11_01_09\packages\ti\drivers\I2C.h

C:\TI\tirtos_simplelink_2_11_01_09\packages\ti\drivers\i2c\I2CCC26XX.c

C:\TI\tirtos_simplelink_2_11_01_09\packages\ti\drivers\i2c\I2CCC26XX.h

Yes, you have to do these steps. You can find them in my latest attachment.

had the same problem. u need to add:

#define TI_DRIVERS_I2C_INCLUDED