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RTOS/SENSOR-CONTROLLER-STUDIO: Execution code : Too many concurrent register variables.

Himanshu Gupta25
Intellectual 435 points
Part Number: SENSOR-CONTROLLER-STUDIO
Other Parts Discussed in Thread: CC1310

Tool/software: TI-RTOS

Hi,

I am try to right the code for magnetometer using sensor studio. as you know there are 3 axis, ie X, Y, and Z..

code snippet:

i2cStart();

i2cTx(MAG_ADDR | I2C_OP_WRITE);

i2cTx(MAG_DR_STATUS);

if (state.i2cStatus == 0x0000) {

i2cRepeatedStart();

i2cTx(MAG_ADDR | I2C_OP_READ);

i2cRxAck(mag_status);

i2cRxAck(mag_x_msb);

i2cRxNack(mag_x_lsb);

i2cTx(MAG_ADDR | I2C_OP_READ);

i2cRxAck(mag_y_msb);

i2cRxNack(mag_y_lsb);

i2cTx(MAG_ADDR | I2C_OP_READ);

i2cRxAck(mag_z_msb);

i2cRxNack(mag_z_lsb);

}

i2cStop();

output.MagXyzStatus = mag_status;

output.magOut[0] = (mag_x_msb <<8) | mag_x_lsb;

output.magOut[1] = (mag_y_msb <<8) | mag_y_lsb;

//output.magOut[2] = (mag_z_msb <<8) | mag_z_lsb;    <<<------- if UN-commented this line then i get above given error " Too many concurrent register variables.conflict involves: mag_y_lsb,mag_z_lsb,mag_z_msb, mag_x_lsb, mag_y_msb,mag_x_msb, mag_status"

 

// Schedule the next execution

fwScheduleTask(1);

please help to resolve this issue.

  • 0
    TI__Mastermind 23730 points
    Hi Himanshu,

    Which device are you using?
  • 0 in reply to Severin Suveren
    Intellectual 435 points
    Launchapd cc1310 and MAG3110 as magnetometer
  • 0 in reply to Himanshu Gupta25
    TI__Mastermind 23730 points
    And what type of variables are mag_status, mag_*_msb, and such?
  • 0 in reply to Severin Suveren
    TI__Mastermind 23730 points

    Either way, I'm able to reproduce the error. You are essentially using to many variables at the same time. Simply reusing variables fixes the issue, something along the lines of this:

    U16 status = 0;
U16 msb = 0;
U16 lsb = 0;

i2cStart();

i2cTx(MAG_ADDR | I2C_OP_WRITE);
i2cTx(MAG_DR_STATUS);
    
if (state.i2cStatus == 0x0000) {
    i2cRepeatedStart();
    
    i2cTx(MAG_ADDR | I2C_OP_READ);
    i2cRxAck(status);
    i2cRxAck(msb);
    i2cRxNack(lsb);
    
    output.MagXyzStatus = status;
    output.magOut[0] = (msb << 8) | lsb;
    
    i2cTx(MAG_ADDR | I2C_OP_READ);
    i2cRxAck(msb);
    i2cRxNack(lsb);
    
    output.magOut[1] = (msb << 8) | lsb;
    
    i2cTx(MAG_ADDR | I2C_OP_READ);
    i2cRxAck(msb);
    i2cRxNack(lsb);
    
    output.magOut[2] = (msb << 8) | lsb;
}

i2cStop();

fwScheduleTask(1);

  • 0 in reply to Severin Suveren
    Intellectual 435 points
    U16 mag_status;
    U16 mag_x_msb;
    U16 mag_y_msb;
    U16 mag_z_msb;
    U16 mag_x_lsb;
    U16 mag_y_lsb;
    U16 mag_z_lsb;

    mag_x_msb = 0x00;
    mag_y_msb = 0x00;
    mag_z_msb = 0x00;
    mag_x_lsb = 0x00;
    mag_y_lsb = 0x00;
    mag_z_lsb = 0x00;
    mag_status = 0x00;
  • 0 in reply to Severin Suveren
    Intellectual 435 points

    with above code snippet issue is fixed, but output of magnetometer is  get wronged.  i am getting only x axis value and status field also changed.

    please refer video for issue.

  • 0 in reply to Himanshu Gupta25
    TI__Mastermind 23730 points
    Himanshu,

    Please refer to the MAG3110 data sheet or appropriate NXP support forums for how to interface with the MAG3110 sensor.

    But, just with a quick glance, it looks like you are just reading from the same register.
  • 0 in reply to Severin Suveren
    Intellectual 435 points

    Can you please tell me how to add more variable, or how can i access 32bit address using one variable in SCS. and what is max limit of variable that can be used in SCS.

    As i know i2c can  access 16bit at a time is there any way to access 32bit through i2c.

  • 0 in reply to Himanshu Gupta25
    TI__Mastermind 23730 points

    The maximum word size on the Sensor Controller is 16 bits. You can emulate 32 bit variables by storing the high and low word of the 32 bit value, which the main application can create a 32 bit value out of. E.g.

    // Data structure members, x, y and z are U16 arrays of length 2
output
    x[2]  // [0] is lsb, [1] is msb
    y[2]
    z[2]

// In you task code
// Fetch lsb and msb
i2cRxAck(msb);
i2cRxNack(lsb);
output.x[0] = lsb;
output.x[1] = msb;
// Etc. for all other axis

    There isn't a limit of maximum number of variables you can create and use in Sensor Controller. There is, however, a limit of maximum number of variables you can use concurrently.

  • 0 in reply to Severin Suveren
    Intellectual 435 points
    Thanks for help this fixed the issue..