CC2650 as I2C Slave

Hi Christin,

Added Power_setDependency(PowerCC26XX_PERIPH_I2C0); and still the same.

As for exception handle I'm not sure if this is what you're asking for.

Thank you!

Hi,

The exception handle indicates that the power domain for I2C is not on yet.

Can you add the following code before doing any initialization? Also you need to pick 2 IOs for your SDA and SCL line.

    PRCMPowerDomainOn(PRCM_DOMAIN_PERIPH);

    Power_setDependency(PowerCC26XX_PERIPH_I2C0);

    /* Set constraints for Standby, powerdown and idle mode */
    Power_setConstraint(PowerCC26XX_SB_DISALLOW);
    Power_setConstraint(PowerCC26XX_IDLE_PD_DISALLOW);

    PRCMLoadSet();
    PRCMPeripheralRunEnable(PRCM_PERIPH_I2C0); // Enable I2C module
    PRCMLoadSet();

Hello,

Is there a similar implementation available for TI-RTOS 2.21 ?

I'm trying to adapt this code for TI-RTOS 2.21 but facing issues.

[Else is it possible to select both TI-RTOS 2.14 & TI-RTOS 2.21 in a ccs project? so that the drivers can be picked up from TI-RTOS 2.14 wherever required]

Regards

Anurag

Hello Christin,

I was able to write a code for TI-RTOS 2.21 by reffering I2CSlave.h

The last error I'm not able to solve is :

".......................................

.....................................

undefined       first referenced                                                                                                                                

 symbol             in file                                                                                                                                    

---------       ----------------                                                                                                                                

I2CSlave_config C:/ti/tirtos_cc13xx_cc26xx_2_21_00_06/products/tidrivers_cc13xx_cc26xx_2_21_00_04/packages/ti/drivers/lib/drivers_cc26xxware.aem3<I2CSlave.oem3>

error #10234-D: unresolved symbols remain

error #10010: errors encountered during linking; "i2cslave_trialv2.out" not built

>> Compilation failure

makefile:144: recipe for target 'i2cslave_trialv2.out' failed

gmake[1]: *** [i2cslave_trialv2.out] Error 1

makefile:140: recipe for target 'all' failed

gmake: *** [all] Error 2

**** Build Finished ****  "

Can you suggest what am I missing. I figured that it's now an issue with I2CSlave_config.

My code is as follows:

Void taskFxn(UArg arg0, UArg arg1)
{

    uint8_t ret;

    I2CSlave_Handle      i2c;
    I2CSlave_Params i2cParams;

    /* Create I2C for usage */
   
    I2CSlave_Params_init(&i2cParams);
    i2cParams.slaveAddress = 0x74;
    I2CSlave_init();

    i2c = I2CSlave_open(0, &i2cParams);
    if (!i2c)
    {
        System_printf("I2CSlave did not open");
     }

   
   I2CSlave_read(i2c, &ret, 10);
    if (!ret)
    {
        System_printf("Unsuccessful I2CSlave read");
    }

    System_printf("Debug %d t\n", ret);


    /* Deinitialized I2C */
    I2CSlave_close(i2c);
    //I2C_close(i2c);
    System_printf("I2C closed!\n");

    System_flush();
}





/*
 *  ======== main ========
 */
int main(void)
{
 //   Task_Params taskParams;

    /* Call board init functions */
    Board_initGeneral();
    Board_initI2C();


    /* Open LED pins */
    ledPinHandle = PIN_open(&ledPinState, ledPinTable);
    if(!ledPinHandle) {
        System_abort("Error initializing board LED pins\n");
    }
    PIN_setOutputValue(ledPinHandle, Board_LED1, 1);

    /* Start BIOS */
    BIOS_start();

    return (0);
}

Hi Christin Lee,

Can you also help me i am also facing similar issue. I want to use cc2640 as slave on i2c.
Is this the driver API
http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/tirtos/2_14_01_20/exports/tirtos_full_2_14_01_20/products/cc26xxware_2_21_03_15980/doc/driverlib/group__i2c__api.html  

you mentioned above? Can i utilize this API to use cc2640 as slave on I2C?

Waiting for your kind help.

Hello Christin Lee,

I have tried on cc2640 as you suggested above but application does not work properly.

The code is following:

Task_Struct taskStruct;
Char task0Stack[SBP_TASK_STACK_SIZE];

#define I2C0_SCL0          IOID_2
#define I2C0_SDA0          IOID_3

void i2C_createTask(void)
{
  Task_Params task_i2cParams;
  Task_Params_init(&task_i2cParams);
  task_i2cParams.stack = task0Stack;
  task_i2cParams.arg0 = 1000000 / Clock_tickPeriod;
  task_i2cParams.stackSize = SBP_TASK_STACK_SIZE;
  task_i2cParams.priority = 4;

  Task_construct(&taskStruct, i2c_taskFxn, &task_i2cParams, NULL);
}

uint8_t status=1;
uint32_t i2cDataArray[10]={0};
static void i2c_taskFxn(UArg a0, UArg a1) {

    PRCMPowerDomainOn(PRCM_DOMAIN_PERIPH);

    Power_setDependency(PowerCC26XX_PERIPH_I2C0);
    // Set Power dependecies & constraints
    Power_setDependency(PowerCC26XX_PERIPH_GPIO);

    /* Set constraints for Standby, powerdown and idle mode */
    Power_setConstraint(PowerCC26XX_SB_DISALLOW);
    Power_setConstraint(PowerCC26XX_IDLE_PD_DISALLOW);

    PRCMLoadSet();
    PRCMPeripheralRunEnable(PRCM_PERIPH_I2C0); // Enable I2C module
    PRCMPeripheralRunEnable(PRCM_PERIPH_GPIO);
    PRCMLoadSet();
    PIN_State i2cPinState;
    PIN_Handle i2cPinHandle = PIN_open(&i2cPinState, i2cPinTable);
    status=PINCC26XX_setMux(i2cPinHandle, I2C0_SCL0, IOC_PORT_MCU_I2C_MSSCL);
     if(status==0)
    {
      status=1;
    }
    status=PINCC26XX_setMux(i2cPinHandle, I2C0_SDA0, IOC_PORT_MCU_I2C_MSSDA);
    if(status==0)
    {
      status=1;
    }
    I2CSlaveInit(I2C0_BASE, 0x53);
    uint8_t i=0;

    while(1) {
      // i2C read transaction
        while(I2CSlaveStatus(I2C0_BASE) != I2C_SLAVE_ACT_RREQ_FBR);
        i2cDataArray[0] = I2CSlaveDataGet(I2C0_BASE);
        {
            for (i = 1; i < 3; i++)
            {
              while(I2CSlaveStatus(I2C0_BASE) != I2C_SLAVE_ACT_RREQ);
              i2cDataArray[i] = I2CSlaveDataGet(I2C0_BASE);
            }
        }
        // i2C write transaction
        while(I2CSlaveStatus(I2C0_BASE) != I2C_SLAVE_ACT_TREQ);
         I2CSlaveDataPut(I2C0_BASE, 0x10);
    }
  }

int main()
{
  /* Register Application callback to trap asserts raised in the Stack */
  //RegisterAssertCback(AssertHandler);

 PIN_init(BoardGpioInitTable);
// Board_initGeneral();

#if defined( USE_FPGA )
  // set RFC mode to support BLE
  // Note: This must be done before the RF Core is released from reset!
  SET_RFC_BLE_MODE(RFC_MODE_BLE);
#endif // USE_FPGA
  
  // Enable iCache prefetching
  VIMSConfigure(VIMS_BASE, TRUE, TRUE);

  // Enable cache
 VIMSModeSet(VIMS_BASE, VIMS_MODE_ENABLED);

#if !defined( POWER_SAVING ) || defined( USE_FPGA )
  /* Set constraints for Standby, powerdown and idle mode */
  // PowerCC26XX_SB_DISALLOW may be redundant
  Power_setConstraint(PowerCC26XX_SB_DISALLOW);
  Power_setConstraint(PowerCC26XX_IDLE_PD_DISALLOW);
#endif // POWER_SAVING | USE_FPGA

  /* Initialize ICall module */
  ICall_init();

  /* Start tasks of external images - Priority 5 */
  ICall_createRemoteTasks();

  /* Kick off profile - Priority 3 */
  GAPRole_createTask();

  SimpleBLEPeripheral_createTask();
  i2C_createTask();

  /* enable interrupts and start SYS/BIOS */
  BIOS_start();

  return 0;
}

Can you please help me? what can be the reason?

Hello ,

Any help please?

Hello Christin & mabbas,

Christin Lee

I am using Ti-Rtos 2.21 and am facing the following issues:

>> Compilation failure
subdir_rules.mk:51: recipe for target 'main.obj' failed
"../main.c", line 61: error #20: identifier "i2cPinTable" is undefined
"../main.c", line 132: warning #225-D: function "ICall_init" declared implicitly
"../main.c", line 135: warning #225-D: function "ICall_createRemoteTasks" declared implicitly
"../main.c", line 138: warning #225-D: function "GAPRole_createTask" declared implicitly
"../main.c", line 140: warning #225-D: function "SimpleBLEPeripheral_createTask" declared implicitly
1 error detected in the compilation of "../main.c".
gmake: *** [main.obj] Error 1
gmake: Target 'all' not remade because of errors.

**** Build Finished ****

I'm not able to initialize i2cPinTable in Ti-Rtos 2.21. Can you tell me how to go about solving it or which files should I explore?

Mujahid Abbas

 I am trying to implement  I2C as a slave on CC2650, 

Can you let me know your findings?

Are you using Ti-Rtos 2.14 or 2.21?

I do have a master module ready for testing but working on resolving the above issues.

Hello Anurag Meena,

Did you got the solution of your problem??

Hello Christin,

I am using it with BLE stack. What priority i should set? Should it higher then other tasks? I can test i2c slave while debugging or it does not work when the debugger is attached to cc2640?? I am trying to test it with debugger but i have not observed any thing.

waiting for your kind reply.

Regards

MAbbas

Hello Christin Lee,

I want to put the cc2640 to standby . When i configure I2C as slave only one time before the 

i2c_Configuration();

// Application main loop
for (;;)
{

}

I have clock_event that puts cc2640 to standby.

in event i release the power constraints and put the device to standby by using:

Power_releaseDependency(PowerCC26XX_PERIPH_I2C0);
Power_releaseDependency(PowerCC26XX_PERIPH_GPIO);
Power_releaseConstraint(PowerCC26XX_SB_DISALLOW);
Power_releaseConstraint(PowerCC26XX_IDLE_PD_DISALLOW);
Task_sleep(NULL);
Power_sleep(PowerCC26XX_STANDBY);

1. But when i wakeup cc2640 using wake up line the I2C does not work again.

2. If i configure the I2C every time when wakup occurs then the cc2640 does not goes to standby mode. As the current consumption is 2-3 mA.

3. Can you tell me how i can use I2C properly? Should i initialize I2C each time when i want to use it ? or only once initialization would be enough?.

4. About the constraints how i can handle them once the cc2640 is wakeup using wakeup line.

Please help me its urgent.

Regards

MAbbas