Compiler/CC2541: I2c clock settings

Tool/software: TI C/C++ Compiler

Hi,
Taking help from swrc257 >> software examples we are able to understand the flow of i2c interfacing with cc2541,and made some changes in keyfobdemo example code with i2c interface as follows

//>> In KeyFobApp_Init Function
    // Enable I2C on CC2541.
    I2CWC &= ~0x80;
    
     // Enable the I2C module with 33 kHz clock rate.            
    // The STArt bit signals a master.
    I2CCFG = (I2CCFG & ~I2CCFG_CR) | I2CCFG_CR_DIV_960 | I2CCFG_ENS1 | I2CCFG_STA;

    //Enable Global Interrupt
    EA = 1;

//>> In performPeriodicTask Function
    // Clear I2C (P2) CPU interrupt flag.   //Added Idris
    P2IF = 0;
   // Enable interrupt from I2C by setting [IEN2.P2IE = 1].
    IEN2 |= IEN2_P2IE;

//>> In I2C_ISR Function
    // Clear I2C CPU interrupt flag.
    P2IF = 0;
    
          //To transmit If a Start or Restart condition has been transmitted ...
    if ((I2CSTAT == 0x08 || I2CSTAT == 0x10))
    {
        // Send Slave address and R/W access.
        I2CDATA = (SLAVE_ADDRESS << 1) | WRITE_TO_SLAVE;
        // End Start condition.
        I2CCFG &= ~I2CCFG_STA;
    }
    // Send I2C byte    
    I2CDATA = value;      //assigned value=0x01
  // If Slave address or Data byte has been transmitted and acknowledged ...    
    if (I2CSTAT == 0x18 || I2CSTAT == 0x28)
    {
    // Generate Stop condition.
        I2CCFG |= I2CCFG_STO;
    // Disable interrupt from I2C by setting [IEN2.I2CIE = 0].
      IEN2 &= ~IEN2_P2IE;    
    }
    // I2CCFG.SI flag must be cleared by software at the end of the ISR.
    I2CCFG &= ~I2CCFG_SI;

But we are unable to see the clock cycle on oscilloscope.
Are we missing something??