OMAP L138 I2C issue ICXRDY not setting '1', always 0 after transmission

I would recommend the examples found in StarterWare as a place to go for reference code. If you still have issues you can reply here.

Jeff

Hi

Thanks for the suggestions.. in my code whether i miss below..

Enable I2C clock from the Power and Sleep Controller if it is driven by Power and Sleep Controller
(see your device-specific System Reference Guide).

if means kindly help me how to enable this feature

Regards

Vijayabharathi C

That does not apply to this device. The StarterWare example will show you step by step how to enable everything necessary.

Jeff

I have tried with the below code also.. No fruitful results.. Kindly suggest me how to solve this issue..

http://processors.wiki.ti.com/index.php/QuickStartOMAPL1x_rCSL

Iam currently using the hawk board for this.. Is hawk board have any issue for this I2C0.. we have even removed the components sharing I2C0 and tested the bit banging for I2C by using as GPIO for I2C emulation. bit banging for I2C0 is working perfectly. But for our current experiement we need hardware I2C to work because of  speed limitation for another applicationrunning parallel. Kindly suggest me how to solve this issue..

/*-----------------------------------------------------------------------------
 *
 *                 BEGIN EXAMPLE: I2C_io_expander_armL138
 *
 *---------------------------------------------------------------------------*/
void main (void)
{
    // Initialize OMAPL138 EVM (Configure Pins with I2C; I2C with ARM)
    init_OMAPL138();
   
    // Configure the I2C Peripheral
    setup_I2C0();
   
    // Configure the IO Expander
    setup_OMAPL138_io_expander();
   
    // Run Example
//    I2C_io_expander_ARMexample();
}/* End of main */


/*-----------------------------------------------------------------------------
 *
 *                         Internal Functions Defined
 *
 *---------------------------------------------------------------------------*/
static void init_OMAPL138 (void)
{
    // Intrinsic Function; Gain 'supervisor' privileges
    _call_swi(ARM_PRIV_MODE_KEY);
   
    // Open Permissions to SYSCFG Registers
    CSL_FINS(sysRegs->KICK0R, SYSCFG_KICK0R_KICK0, KICK0_KEY);
    CSL_FINS(sysRegs->KICK1R, SYSCFG_KICK1R_KICK1, KICK1_KEY);
   
    // Configure I2C0 Data & Clock Signals
    CSL_FINST(sysRegs->PINMUX4, SYSCFG_PINMUX4_PINMUX4_15_12, I2C0_SDA);
    CSL_FINST(sysRegs->PINMUX4, SYSCFG_PINMUX4_PINMUX4_11_8, I2C0_SCL);
   
    // Configure I2C0 with the ARM CPU
    CSL_FINST(sysRegs->SUSPSRC, SYSCFG_SUSPSRC_I2C0SRC, ARM);
   
    // Close Permissions to SYSCFG Registers
    CSL_FINS(sysRegs->KICK0R, SYSCFG_KICK0R_KICK0, KICK_LOCK);
}/* init_OMAPL138 */

/*---------------------------------------------------------------------------*/

static void setup_I2C0 (void)
{
    // Place I2C in Reset
    CSL_FINST(i2c0Regs->ICMDR, I2C_ICMDR_IRS, DISABLE);
   
    // Configure I2C Mode (Select 7-Bit Addressing & Transfer 8 Bits)
    CSL_FINST(i2c0Regs->ICMDR, I2C_ICMDR_XA, 7BIT);
    CSL_FINST(i2c0Regs->ICMDR, I2C_ICMDR_BC, 8BIT);
   
    // Disable Other I2C Modes (Repeat, Loopback, Free Data, Start Byte)
    CSL_FINST(i2c0Regs->ICMDR, I2C_ICMDR_RM, DISABLE);
    CSL_FINST(i2c0Regs->ICMDR, I2C_ICMDR_DLB, DISABLE);
    CSL_FINST(i2c0Regs->ICMDR, I2C_ICMDR_FDF, DISABLE);
    CSL_FINST(i2c0Regs->ICMDR, I2C_ICMDR_STB, DISABLE);
   
    // Configure I2C Clock Operation Freq (MUST BE BETWEEN 6.7 AND 13.3 MHz)
    CSL_FINS(i2c0Regs->ICPSC, I2C_ICPSC_IPSC, DIVto12MHZ);
   
    // Configure Clock Low/High Time (20 kHz)
    CSL_FINS(i2c0Regs->ICCLKL, I2C_ICCLKL_ICCL, 294);
    CSL_FINS(i2c0Regs->ICCLKH, I2C_ICCLKH_ICCH, 294);
   
    // Disable and Clear Pending I2C Interrupts
    i2c0Regs->ICIMR = CSL_I2C_ICIMR_RESETVAL;
    i2c0Regs->ICSTR = i2c0Regs->ICSTR;
   
    // Remove I2C from Reset
    CSL_FINST(i2c0Regs->ICMDR, I2C_ICMDR_IRS, ENABLE);
}/* setup_I2C0 */

/*---------------------------------------------------------------------------*/

static void setup_OMAPL138_io_expander (void)
{
    int k;
    // Write to the Port 0 Output Register
    writeIoExpCmd[COMMAND_BYTE] = 0x02;
   
    // Configure LED1 as Output
    writeIoExpCmd[DATA_BYTE] = 0x01;
   
    // Send Address/Data to IO Expander
    while(I2C_write(0x90, writeIoExpCmd, sizeof(writeIoExpCmd)));
/*    for(k=0;k<100;k++)
    {
        I2C_write(0x90, writeIoExpCmd, sizeof(writeIoExpCmd));
    }*/
   
    // Read from the Port 1 Input Register
    readIoExpCmd[COMMAND_BYTE] = INPUT_PORT1;
   
    // Send Address to IO Expander
    while(I2C_write(I2C_IO_EXPANDER_ADDR, readIoExpCmd, sizeof(readIoExpCmd)));
   
    // Read from IO Expander
    while(I2C_read(I2C_IO_EXPANDER_ADDR, inputRegP1, sizeof(inputRegP1)));
   
    // Save DIP Switch Configuration for Later Use
    prevInputP1 = inputRegP1[0] & userSW1;
}/* setup_OMAPL138_io_expander */

Code hangs in this statement and continues in infinite state for long

while(I2C_write(0x90, writeIoExpCmd, sizeof(writeIoExpCmd)));

When i probed the I2C lines, i found some continuous activity going on there.. But if i execute same thing in single step, no activity in I2C lines

while(I2C_write(0x90, writeIoExpCmd, sizeof(writeIoExpCmd)));

Where 0x90 is the device address and 0x02,0x01 are reg address and data to be written