LAUNCHXL-F280049C: DCL REFERENCE GENERATOR

Can you please paste the snippet of code you're using to generate the ref signal?

Hi Sira,

I've attached my code below:

//#############################################################################
//
// FILE:   empty_driverlib_main.c
//
//! \addtogroup driver_example_list
//! <h1>Empty Project Example</h1> 
//!
//! This example is an empty project setup for Driverlib development.
//!
//
//#############################################################################
//
//
// $Copyright:
// Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/
//
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions 
// are met:
// 
//   Redistributions of source code must retain the above copyright 
//   notice, this list of conditions and the following disclaimer.
// 
//   Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the 
//   documentation and/or other materials provided with the   
//   distribution.
// 
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//   its contributors may be used to endorse or promote products derived
//   from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// $
//#############################################################################

//
// Included Files
//
#include "driverlib.h"
#include "device.h"
#include "board.h"
#include "c2000ware_libraries.h"
#include <DCL_refgen.h>

// variable declarations
DCL_REFGEN rgen = DCL_REFGEN_DEFAULTS;
DCL_CSS rgen_css = DCL_CSS_DEFAULTS;

int i;
float32_t x;

interrupt void ISRTimer0(void);
void initTimer(void);

//
// Main
//
void main(void)
{

    //
    // Initialize device clock and peripherals
    //
    Device_init();

    //
    // Disable pin locks and enable internal pull-ups.
    //
    Device_initGPIO();

    //
    // Initialize PIE and clear PIE registers. Disables CPU interrupts.
    //
    Interrupt_initModule();

    //
    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    //
    Interrupt_initVectorTable();

    //
    // PinMux and Peripheral Initialization
    //
    Board_init();

    //
    // C2000Ware Library initialization
    //
    C2000Ware_libraries_init();

    //
    // Enable Global Interrupt (INTM) and real time interrupt (DBGM)
    //
    EINT;
    ERTM;
    rgen.css = &rgen_css;
    DCL_SET_CONTROLLER_PERIOD(&rgen, 0.0001);
    DCL_resetRefgen(&rgen);
    DCL_setRefgenMode(&rgen, REFGEN_SINE);
    DCL_setRefgenFreq(&rgen, 50.0f, 0.0f);
    DCL_setRefgenAmpl(&rgen, 0.25f, 0.0f);
    //DCL_setRefgenRamp(&rgen, 0.15f, 0.01f);

    initTimer();
    while(1)
    {

    }
}

//
// End of File
//

void initTimer(void)
{
    Interrupt_register(INT_TIMER0, &ISRTimer0);
    SysCtl_enablePeripheral(SYSCTL_PERIPH_CLK_TIMER0);
    asm(" RPT #5 || NOP");

    CPUTimer_setPeriod (CPUTIMER0_BASE, 100000);
    CPUTimer_setPreScaler (CPUTIMER0_BASE, 0);

    CPUTimer_stopTimer(CPUTIMER0_BASE);
    CPUTimer_reloadTimerCounter(CPUTIMER0_BASE);
    CPUTimer_setEmulationMode(CPUTIMER0_BASE, CPUTIMER_EMULATIONMODE_STOPAFTERNEXTDECREMENT);
    CPUTimer_clearOverflowFlag(CPUTIMER0_BASE);

    /**< enable interrupt of the timer */
    CPUTimer_enableInterrupt(CPUTIMER0_BASE);

    /**< enable cpu interrupt number 13 for the timer 1 interrupt */
    Interrupt_enable(INT_TIMER0);

    /**< start timer */
    CPUTimer_startTimer(CPUTIMER0_BASE);
}

interrupt void ISRTimer0(void)
{
    DCL_runRefgen(&rgen);
    i++;
    x = DCL_getRefgenPhaseA(&rgen);
    Interrupt_clearACKGroup(INTERRUPT_ACK_GROUP1);
}

I also did this in the linker file: dclfuncs : > RAMGS1,    PAGE = 0

Thanks,

Aloba.

Please give me a day or so to review this and get back to you. Unfortunately we currently don't have an example for this in DCL, I will also try to work on a plan to create one.

Hello Sira,

I'd like to gently remind you that I'm eagerly awaiting your feedback.

Aloba,

I noticed you have

DCL_SET_CONTROLLER_PERIOD(&rgen, 0.0001);

which corresponds to 0.1ms i.e. 100us, whereas your ISR is at 10us.

I believe you need

DCL_SET_CONTROLLER_PERIOD(&rgen, 0.00001);

If this doesn't help, try putting a breakpoint inside DCL_runRefgen() in DCL_refgen.h and checking the values of p->mode, p->theta, p->ya.

Thanks,

Sira

Hello Sira,

I've adjusted the parameter of DCL_SET_CONTROLLER_PERIOD() as recommended, but I haven't noticed any changes so far. I've captured snapshots of the values of 'p' within DCL_runRefgen() from DCL_refgen.h at 5 different intervals, and I've attached them.

It's possible that there's something I'm missing or not understanding correctly.

Thank you,

Aloba.

So the mode looks correct (2 = REFGEN_SINE), and the theta values seem to be updating as expected. But the ya is 1 in each case, so that's wrong.

Do you have the TMU enabled in your project? Can you place a breakpoint there, look at the generated code in the disassembly view and see whether SINPUF32 is generated?

Thanks,

Sira

Hello Sira,

TMU0 is enabled, and here is the disassembly output.

Best regards,
Aloba

Aloba,

Please step through the instructions from 00e26a to 00e274 and look at the corresponding values in ACC, R0H etc. to understand what is happening. That may give a clue about why theta is non-zero but ya is 1.

Thanks,

Sira 

I've followed the instructions and checked if there were any changes in the ACC or R0H parameters, but I didn't find any.

Also, I must admit that while the instructions are in assembly language, I don't fully understand the language and much of what I see in the disassembler.

Aloba,

What I mean is check them as you step through the code from 00e26a to 00e274. Please send a screenshot of the register view window in CCS with these (ACC, R0H) and also p->theta, p-> ya.