MSP430F5529: How can I use PWM and TIMER on TI-RTOS?

Zheng Wei Huang

Intellectual 460 points

Other Parts Discussed in Thread: MSP430F5529

Dear all,

As, title. How should I do?

I use CCSv7, TI-RTOS_2.20.0.06 and TI v16.9.6.LTS.

I know if use non-RTOS, the TIMER can run on #pragma vector=TIMER1_A0_VECTOR.

But I also declaration on TI-RTOS, the compiler will show error(symbol "__TI_int49" redefined).

How can I resolve this error?

Thanks.

over 4 years ago

0 Eason Zhou over 4 years ago

TI__Mastermind 39775 points

It seems that this interrupt has been defined in other place. Maybe you can use the timer interrupt by calling some function directly. Or you can search the whole project to find this interrupt.

0 Keith Barkley over 4 years ago

Guru 42135 points

There is a PWM driver to use (From the MSP430 T-RTOS manual:)

TI-RTOS includes drivers for the following peripherals. These drivers are in the <install_dir>/products/tidrivers_<version>/packages/ti/drivers directory. TI-RTOS examples show how to use these drivers. Note that all of these drivers are built on top of MSPWare.The TI-RTOS installation installed drivers for multiple device families. The following list indicates which drivers can be use with MSP43x targets:

•GPIO. API set intended to be used directly by the application or middleware to manage the GPIO interrupts, pins, and ports.

•I2C. API set intended to be used directly by the application or middleware.

•Power. Power management framework. See the TI-RTOS Power Management User’s Guide(SPRUI18)

•PWM. API set intended to be used directly by the application or middleware to generate Pulse Width Modulated signals.

0 Zheng Wei Huang over 4 years ago in reply to Eason Zhou

Intellectual 460 points

Hi Eason,

I search the project but not found. Where can I find? or have any other method can I use?

Thanks.

0 Zheng Wei Huang over 4 years ago in reply to Keith Barkley

Intellectual 460 points

Hi Keith,

TI/RTOS driver to may configure a PWM_config structure. but there is no definition of PWM_config structure in the MSP430F5529.c.
How can I do?
Thanks.

0 Keith Barkley over 4 years ago in reply to Zheng Wei Huang

Guru 42135 points

Are you including the driver .h?

This is for a different MCU, but it should be similar

https://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/tirtos/2_20_00_06/exports/tirtos_full_2_20_00_06/products/tidrivers_cc13xx_cc26xx_2_20_00_08/docs/doxygen/html/_p_w_m_8h.html

0 Keith Barkley over 4 years ago in reply to Keith Barkley

Guru 42135 points

Found the link for the MSP430:

http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/tirtos/2_20_00_06/exports/tirtos_full_2_20_00_06/products/tidrivers_msp43x_2_20_00_08/docs/doxygen/html/index.html

0 Zheng Wei Huang over 4 years ago in reply to Keith Barkley

Intellectual 460 points

Hi Keith,

In MSP430F5529 only have PWM.h. Not have PWMTimerMSP430.h.
I can include PWM.h. But, when I call PWM_open(unsigned int index, PWM_Params * params ), it will fail.

Because I can not set index.

For TI example, PWM_open(Board_PWM0, &params); How can I set index, just like Board_PWM0?

I can not find any PWM_config structure. Please help me.

Thanks.

0 Keith Barkley over 4 years ago in reply to Zheng Wei Huang

Guru 42135 points

PWM_Handle handle;
PWM_Params params;
PWM_init();
PWM_Params_init(&params);
params.idleLevel = PWM_IDLE_LOW; // Output low when PWM is not running
params.period.unit = PWM_PERIOD_HZ; // Period is in Hz
params.period.value = 1e6; // 1MHz
params.duty.unit = PWM_DUTY_FRACTION; // Duty is fraction of period
params.duty.value = 0; // 0% duty cycle
handle = PWM_open(Board_PWM0, &params);
if (handle == NULL) {
System_printf("PWM did not open");
Task_exit();
}
PWM_start(handle);

0 Zheng Wei Huang over 4 years ago in reply to Keith Barkley

Intellectual 460 points

Hi Keith,

I known this example. But how to init Board_PWM0?

Can you give me an example?

In MSP430 RTOS example not show any about init Board_PWM0 examples or detail.

Thanks.

0 Keith Barkley over 4 years ago in reply to Zheng Wei Huang

Guru 42135 points

I am not sure what you mean, this is how you set the system up for PWM, you "init" the driver, and "open" the various instances.

If you are having some errors, describe them in detail.

0 Keith Barkley over 4 years ago in reply to Zheng Wei Huang

Guru 42135 points

I could not find one for the 5529, but here is an example for the MSP432P401R:

https://dev.ti.com/tirex/explore/node?devtools=MSP-EXP432P401R&node=ADO9wJSE-yLWoIEr6a2igQ__z-lQYNj__LATEST

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MSP430F5529: How can I use PWM and TIMER on TI-RTOS?