LAUNCHXL-CC1352R1: I2C Configuration

Hi Musa,

Please have a look at the i2ctmp example of our SDK, as well as the documentation: https://dev.ti.com/tirex/explore/content/simplelink_cc13xx_cc26xx_sdk_7_10_02_23/docs/drivers/doxygen/html/_i2_c_8h.html

It shows how to work with the driver, and SysConfig.

Regards,

Arthur

Thanks a lot, I looked there. However, I need some help on the below code:

// Global variables
I2C_Handle i2cHandle;
I2C_Params i2cParams;
I2C_Transaction i2cTransaction = {0};
void i2cStart(){
// One-time init of I2C driver
I2C_init();
// initialize optional I2C bus parameters
I2C_Params_init(&i2cParams);
i2cParams.bitRate = I2C_400kHz;
// Open I2C bus for usage
i2cHandle = I2C_open(CC1352_I2C_INSTANCE, &i2cParams);
if (i2cHandle == NULL) {
// Error opening I2C
while (1) {}
}
}

In this function, 

i2cHandle = I2C_open(CC1352_I2C_INSTANCE, &i2cParams);

this line stops the function, for CC1352_I2C_INSTANCE = 0, this line is not working and there is no error message, CC1352_I2C_INSTANCE = 0x19, it goes to while loop and stocks. I observe this by step by step progress. How can I find the true value of CC1352_I2C_INSTANCE ? 

Also, are there any printf vs function to print the output on the CCS ? System_printf() is not working.

Hi Musa,

The instance has to be defined in the SysConfig tool. For instance, if you want to keep the same name as you have right now, it would look like this:

As of the prints, you have several options, but you can for instance use the Display.h module, with Display_printf, as I have done in that E2E thread:

https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz-group/sub-1-ghz/f/sub-1-ghz-forum/1333776/cc1312r-queue-unable-to-delete-element

Regards,

Arthur

Thanks for the reply, as shown in the images, I got this error. How can I solve this?

Thanks in advance.

Hi Musa,

You can look at the generated SysConfig files, for instance, ti_drivers_config.h:

Can you double check what constant is generated by SysConfig, and use that one in your program? 

Make sure to save the SysConfig file prior to building.

Regards,

Arthur

This is ti_drivers_config.h, I couldn't solve the problem. I have 2 ti_drivers_config.c files, is this normal?

// Global variables
I2C_Handle i2cHandle;
I2C_Params i2cParams;
I2C_Transaction i2cTransaction = {0};
void i2cStart(){
   // One-time init of I2C driver
   I2C_init();
   // initialize optional I2C bus parameters
   I2C_Params_init(&i2cParams);
   i2cParams.bitRate = I2C_400kHz;
   // Open I2C bus for usage
   i2cHandle = I2C_open(CC1352_IC2_INSTANCE_CONST, &i2cParams);
   if (i2cHandle == NULL) {
       // Error opening I2C
        while (1) {}
    }
}

With step-by-step observation, the code stuck on the line :  i2cHandle = I2C_open(CC1352_IC2_INSTANCE_CONST, &i2cParams);

How can ı solve this problem, even it didn't return NULL?  Is this because of the function, or should it be a global variable ? 

I really appreciate any help you can provide.

Part Number: LAUNCHXL-CC1352R1

Hello, I want to connect a camera (OV7670) to my device with the I2C protocol. In my source file, I wrote a function like this : 

void deviceInit(void) {

   I2C_init();
    // initialize optional I2C bus parameters
   I2C_Params_init(&i2cParams);
   i2cParams.bitRate = I2C_400kHz;
   // Open I2C bus for usage
   i2cHandle = I2C_open(CC1352_IC2_INSTANCE_CONST, &i2cParams);
   if (i2cHandle == NULL) {
   // Error opening I2C
       while (1) {}
   }

}

When I step through the code, it stops progressing at this line :  i2cHandle = I2C_open(CC1352_IC2_INSTANCE_CONST, &i2cParams);

It even didn't return NULL. 

// Global variables
I2C_Handle i2cHandle;
I2C_Params i2cParams;
I2C_Transaction i2cTransaction = {0};

I created these variables also on the source file.

How can I solve this problem and make the connection working, any suggestion will be appreciated.

Hi Musa, 

I joined these two threads, it seems to be referring to the same problem. 

May I ask, what was your starting point for your project? 

Arthur was referring to the i2ctmp example because it sets up everything you need to make the i2c driver to work.

If you are using some other project as starting point, have you enabled i2c on sysconfig? 

Regards,

Sid

Hi, sorry for the late reply, If I understood you correctly, my starting point is the i2ctmp example. I have to set up the I2C connection between the device and the OV7670 camera module.  Since there is no example project I found, my only reference is the i2ctmp example. 

I enabled i2c on sysconfig.

As you can understand from my last question, Arthur's replies solved some problems with configuration, however, I still got stuck on the code part.

Any suggestion or feedback will be appreciated.