topic Re: Getting the pin status using PINS_DRV_ReadPins in S32K

Getting the pin status using PINS_DRV_ReadPins

abhinandan — Wed, 06 Apr 2022 07:15:21 GMT

Hi Community,

I am working on S32K118 eval board, I need to get the status of each pin, can you please help me to know whether I can get this using PINS_DRV_Readpins command and how to obtain the output.

Thank You

Re: Getting the pin status using PINS_DRV_ReadPins

Robin_Shen — Thu, 07 Apr 2022 07:54:43 GMT

Hi abhinandan,

Although the description of PINS_DRV_ReadPins shows: This function returns the current input values from a port. Only pins configured as input will have meaningful values.

But I think you can still read the pin state via the GPIO port data input register (GPIO_PDIR).

Best Regards,
Robin
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Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Tue, 12 Apr 2022 16:51:45 GMT

Hi Robin,

PINS_DRV_ReadPins function always return 1 for corresponding GPIO pin which is configured as input or else always return 0 if configured as output. Is this correct? For input configuration it didn't change the pin value to zero for short circuiting the configured pin with Ground.

Re: Getting the pin status using PINS_DRV_ReadPins

Robin_Shen — Wed, 13 Apr 2022 04:35:35 GMT

How about direct read the value of GPIO_PDIR?
When pin is configured as input with internal pull down enabled, then test PINS_DRV_ReadPins.
When pin is configured as output and output high or low, then test PINS_DRV_ReadPins.

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 05:52:57 GMT

yes PIN_DRV_ReadPins function return the GPIO_PDIR value,

this is how i have read the PTC8 pin status

//Reading the input value of PTC8:

uint32_t pinstatus = PINS_DRV_ReadPins(GPIOC_PORT) >> (PTC8_INPUT) & 0x01;

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 05:48:34 GMT

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 06:10:13 GMT

Hi Robin,

This is what i want to works like push button configuration,

1.Initially PTC8 pin is in zero state value
2.When interrupt came(e.g.,PTC8 pin connecting with VCC) the value become 1.
3.When PTC8 pin connecting with GND then the value become 0.

Re: Getting the pin status using PINS_DRV_ReadPins

Robin_Shen — Wed, 13 Apr 2022 07:13:52 GMT

Configure PTC8 as output, and able to see the PDIR change with toggle.

Why you configure PTC8 as input but call PINS_DRV_SetPins and PINS_DRV_ClearPins.

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 08:50:57 GMT

No, i am calling PINS_DRV_SetPins and PINS_DRV_ClearPins for LED pin not for PTC8 pin

Re: Getting the pin status using PINS_DRV_ReadPins

Robin_Shen — Wed, 13 Apr 2022 09:25:26 GMT

So you just want the external voltage connect to PTC8, and trigger PORT interrupt, then output value to other pins?

In short, you want to implement the PTC8 pin interrupt and control the output level of other pins in the pin interrupt?

Please refer the button interrupt in can_pal_s32k118 example:

Re: Getting the pin status using PINS_DRV_ReadPins

abhinandan — Wed, 13 Apr 2022 09:36:17 GMT

Hi Robin,

Thank You for your reply, will check this.

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 11:38:24 GMT

Hi Robin,

Yeah this button interrupt (can_pal) code does what i need, but when i configured PTC8 pin instead of both button pin PTD3 and PTD5,interrupt is not triggered what will be the problem? Do you have any idea?

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 11:45:43 GMT

"buttonISR" callback function only called when interrupt occured for the button pins PTD3,PTD5 not for PTC8 pin

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 12:01:32 GMT

Even i configured PTD2 pin for interrupt it works fine like button pins, but PTC8 pin not get triggered.why its not get triggered?

Re: Getting the pin status using PINS_DRV_ReadPins

Robin_Shen — Wed, 13 Apr 2022 12:03:40 GMT

Did you configure the PTC8 as input\internal pullup\enable interrupt at raising edge?

You need to check the flag and clear the flag of PTC8 in buttonISR.

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 12:58:38 GMT

Yes i have configured as like what you sent, but still interrupt didn't occured for PTC8.

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Wed, 13 Apr 2022 13:46:10 GMT

But when i configured "interrupt on raising edge" initially when code starts to run it hit the buttonISR callback function after that i didnt hit even connecting the pin to vcc for generating the interrupt.Can you please check on your side for the PTC8 pin interrupt?

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Thu, 14 Apr 2022 06:33:48 GMT

I think some problem regarding the pin PTC8,as same as if i configured for button pin PTD3 it works perfectly what i expected, i don't know why its not working for PTC8.

Re: Getting the pin status using PINS_DRV_ReadPins

Robin_Shen — Thu, 14 Apr 2022 07:45:19 GMT

S32K118EVB Q064 or S32K118EVB2Q048 are you using?
The R683 is DNP, so the signal did not route to PORTC 8 by default.

I am able to trigger PORTC 8 interrupt, test on S32K118EVB.

Re: Getting the pin status using PINS_DRV_ReadPins

AVND — Thu, 14 Apr 2022 08:07:59 GMT

I am using S32K118EVB2Q048,

so because of R683 is DNP, i cannot able to get the interrupt for the pin?