MPC5xxxのトピックRe: How to Use User Switch on DEVKIT-MPC5748G?

How to Use User Switch on DEVKIT-MPC5748G?

Elsa_24 — Mon, 15 Mar 2021 08:59:29 GMT

Hi, I am trying to familiarize myself with the DEVKIT-MPC5748G. So far I have been able to turn on a user LED. Now I want to control the LED (on and off) with a user switch. I have activated for example the PORT PA3 connected to the User Switch4 as input already. But how do I set the condition "If User Switch4 is pressed then the LED lights up and otherwise the LED stays off"?) Thanks

Re: How to Use User Switch on DEVKIT-MPC5748G?

PetrS — Mon, 15 Mar 2021 09:50:20 GMT

Hi,

if(SIUL2.GPDI[3].R) // PA3 high / SW4 pressed
{
//LED ON
}
else /PA3 low / SW4 released
{

//LED OFF
}

BR, Petr

Re: How to Use User Switch on DEVKIT-MPC5748G?

Elsa_24 — Mon, 15 Mar 2021 10:42:44 GMT

Hi PetrS,

Thanks for your answer.

I tried to do as you suggested but I got an error in the if condition:

<<request for member 'GPDI' in something not a structure or union>>

how to solve the problem?

Here is the corresponding part of my code. The erector signals at the level of the condition in the if

if(SIUL2.GPDI[3].R)
{
PINS_DRV_WritePin(PTA, 10, 1);
}
else
{
PINS_DRV_WritePin(PTA, 10, 0);

}

PS: I have activated PORT PA3 in SIUL2 as an input already. it corresponds to GPIO 3

Re: How to Use User Switch on DEVKIT-MPC5748G?

PetrS — Mon, 15 Mar 2021 11:08:11 GMT

Hi,

check how registers are defined in the device header file.
Under SDK you can use PINS_DRV_ReadPins function.

The usage should be
pin_value = ((uint16_t)(1<<(pin))&PINS_DRV_ReadPins(port))>>(pin);

In your code you can can have e.g.

if((uint16_t)(1<<(3))&PINS_DRV_ReadPins(PTA))
{
PINS_DRV_WritePin(PTA, 10, 1);
}
else
{
PINS_DRV_WritePin(PTA, 10, 0);
}

BR, Petr

Re: How to Use User Switch on DEVKIT-MPC5748G?

Krishnaja — Wed, 24 Mar 2021 04:36:10 GMT

Hi @PetrS ,

I am also getting same error in if loop. "Request for member 'GPDI' in something not a structure or union", I have enclosed the project.

Please tell me how to resolve the error.

Thanks

Krishnaja.

Re: How to Use User Switch on DEVKIT-MPC5748G?

PetrS — Thu, 25 Mar 2021 21:23:18 GMT

Hi,

did you read my latest post?
Either use driver function
if((uint16_t)(1<<(3))&PINS_DRV_ReadPins(PTA))
or according header file use
if(SIUL2->GPDI[3])

BR, Petr

Re: How to Use User Switch on DEVKIT-MPC5748G?

polisetty — Fri, 09 Apr 2021 10:48:52 GMT

Hi I am trying to write a program to control the LED (on and off) with a user switch. If I press the switch the LED must ON and otherwise it remains OFF.(by using MPC5748G controller)

can any one tell me how to write program for that ?

Re: How to Use User Switch on DEVKIT-MPC5748G?

PetrS — Mon, 12 Apr 2021 11:06:08 GMT

Hi,

I guessed this was discussed in this thread.
For example add below code to the simple "hello_Z4_1" example

SIUL2.MSCR[PA10].B.OBE = 1; /* Pad PA10 (10): OBE=1. On EVB active low DS4 LED */
SIUL2.MSCR[PA3].B.IBE = 1; /* Pad PA3 (3): IBE=1. On EVB switch SW4 */

while(1)
{
if(SIUL2.GPDI[PA3].R) // PA3 high / SW4 pressed
{
SIUL2.GPDO[PA10].R = 0;//LED ON
}
else //PA3 low / SW4 released
{
SIUL2.GPDO[PA10].R = 1;//LED OFF
}
}

BR, Petr