J721S2XSOMXEVM: A question about the MCAL sample code Pwm_App_Gpt

Hello,

I am not sure the patch which you shared is for enabling One shot mode.

bingxian lu said:

when I changed TIMER_AUTORLD_NOCMP_ENABLE in mcusw/mcal_drv/mcal/Pwm/src/Pwm_Gptimer.c to TIMER_ONESHOT_NOCMP_ENABLE, When TIMER_AUTORLD_CMP_ENABLE was changed to TIMER_ONESHOT_CMP_ENABLE, it was found that GPTimer failed to generate interrupts

PWM is written for continuous mode only but not for one shot mode.I don't think it is valid to have ONE SHOT in PWM , unless if you disable after one cycle.It is nowhere mentioned in AUTOSAR spec about one shot mode in PWM MCAL drivers.

Regards

Tarun Mukesh

Hi Tarun Mukesh,

  As to the applicaiton of ultrasonic radar "AK1" need drive by one shot mode,   Could you plase help to confirm the gptimer IP support one shot  mode or not?  If support , customer can deploy it by FreeRTOS environment.  Thanks a lot.

Best regards,

Linjun

Hello,

GPTimer supports one shot mode.You can see it in our design document and user guide

https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/07_03_00_07/exports/docs/mcusw/mcal_drv/docs/drv_docs/design_gpt_top.html 

 https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/07_03_00_07/exports/docs/mcusw/mcal_drv/docs/drv_docs/ug_gpt_top.html

But PWM GPT driver is different from GPT driver.

Regards

Tarun Mukesh