DRV8301BoostXL and C2000F28027f launchpad

Loh Yu Lum

Other Parts Discussed in Thread: CONTROLSUITE

I have encountered a problem which is GPIO_Number_12 is still unknown even after i initialized. I'm using GPIO_Number_12 as an input to read pulses from my hall sensor. From there, I want to count the total number of high and low to know the number of cycles the motor has run.

over 8 years ago

0 Loh Yu Lum over 8 years ago

Prodigy 120 points

// No Connection // Make GPIO12 an input
GPIO_setMode(obj->gpioHandle,GPIO_Number_12,GPIO_12_Mode_GeneralPurpose);
GPIO_setDirection(obj->gpioHandle,GPIO_Number_12,GPIO_Direction_Input);
GPIO_setLow(obj->gpioHandle,GPIO_Number_12);

0 Gautam Iyer over 8 years ago in reply to Loh Yu Lum

Guru 192875 points

The way you're checking is incorrect. Btw what is GPIO_Number_12 variable?

0 Loh Yu Lum over 8 years ago in reply to Gautam Iyer

Prodigy 120 points

May i know what is the correct way ? variable as in ?

0 Loh Yu Lum over 8 years ago in reply to Gautam Iyer

Prodigy 120 points

GPIO_setMode(obj->gpioHandle,GPIO_Number_12,GPIO_12_Mode_GeneralPurpose);
GPIO_setPullUp(obj->gpioHandle, GPIO_Number_12, GPIO_PullUp_Disable);
GPIO_setDirection(obj->gpioHandle, GPIO_Number_12, GPIO_Direction_Input);
i changed my setting for GPIO_Number_12

0 Gautam Iyer over 8 years ago in reply to Loh Yu Lum

Guru 192875 points

In Watch Window :
Right Click -> Add Global Variables -> myGpio

Here you'll be able to observe all GPIO related register info.

Regards,
Gautam

0 Loh Yu Lum over 8 years ago in reply to Gautam Iyer

Prodigy 120 points

Hi Gautam,
i have added the global variable but i don't see GPIO_Number_12. How can i check the GPIO_Number_12 is working? However, there is value from GPAMUX1. My gcount1 & 2 still remains as 0

0 Gautam Iyer over 8 years ago in reply to Loh Yu Lum

Guru 192875 points

Loh Yu Lum said:
i have added the global variable but i don't see GPIO_Number_12. How can i check the GPIO_Number_12 is working?

You can monitor GPADAT register. As soon as GPIO12 goes high you would be able to monitor the variation in the register. (Don't forget to debug in continuous refresh mode)

Try settings from Example_2802xGpioSetup.c example that can be found here:

C:\ti\controlSUITE\device_support\f2802x\v230\f2802x_examples_drivers\gpio_setup

  // Make GPIO12 an input
    GPIO_setPullUp(myGpio, GPIO_Number_12, GPIO_PullUp_Enable);
    GPIO_setMode(myGpio, GPIO_Number_12, GPIO_34_Mode_GeneralPurpose);
    GPIO_setDirection(myGpio, GPIO_Number_12, GPIO_Direction_Input);

Let me know if this works.

Regards,

Gautam

0 Loh Yu Lum over 8 years ago in reply to Gautam Iyer

Prodigy 120 points

Hi Gautam,
Thank you so much for your help. I am able to count my pulses. Now i wanna set delays after every specific count. how can i do that?

0 Gautam Iyer over 8 years ago in reply to Loh Yu Lum

Guru 192875 points

Excellent!

Loh Yu Lum said:
Now i wanna set delays after every specific count. how can i do that?

You can use the in-built delay function: DELAY_US(time);

Regards,

Gautam

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DRV8301BoostXL and C2000F28027f launchpad