GPASET GPACLEAR is Not work well

leizhiguang lzg

Firstly, the following configuration:

EALLOW;
   /************扫描口***************************/
    GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 0;//功能普通gpio
    GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 0;
    GpioCtrlRegs.GPAMUX2.bit.GPIO20 = 0;
    GpioCtrlRegs.GPAMUX2.bit.GPIO21 = 0;

    GpioCtrlRegs.GPADIR.bit.GPIO18=1;//输出
    GpioCtrlRegs.GPADIR.bit.GPIO19=1;
    GpioCtrlRegs.GPADIR.bit.GPIO20=1;
    GpioCtrlRegs.GPADIR.bit.GPIO21=1;

EDIS;

But when Run this code:

for(;;)
{

  GpioDataRegs.GPASET.bit.GPIO18=1;
  GpioDataRegs.GPASET.bit.GPIO19=1;
  GpioDataRegs.GPACLEAR.bit.GPIO20=1;
  GpioDataRegs.GPASET.bit.GPIO21=1;
  GpioDataRegs.GPASET.bit.GPIO18=1;
  GpioDataRegs.GPACLEAR.bit.GPIO19=1;
  GpioDataRegs.GPASET.bit.GPIO20=1;
  GpioDataRegs.GPASET.bit.GPIO21=1;
}

GpioDataRegs.GPASET.bit.GPIO18=1 is not work,when run GpioDataRegs.GPASET.bit.GPIO19=1 ,the result is Gpio18 and gpio19 toggle together

why is this？

over 9 years ago

0 Aditya BG over 9 years ago

Expert 1825 points

Hi,
Inside for loop, GPIO18 is SET for both the times. So GPIO 18 will not toggle. If you CLEAR GPIO18 at one place then only GPIO18 will toggle.

-Aditya

0 Vivek Singh over 9 years ago

TI__Guru** 115271 points

Hi,

Which C2000 device you are using?

Regards,

Vivek Singh

0 Aditya BG over 9 years ago in reply to Aditya BG

Expert 1825 points

Sorry i misunderstand you statement. You mean that even though you are not toggling GPIO18, still you are observing GPIO18 toggle?

-Aditya

0 leizhiguang lzg over 9 years ago in reply to Vivek Singh

Intellectual 540 points

When I step by step run, GpioDataRegs.GPASET.bit.GPIO18=1 is NOT SET THE GPIO18 TO 1,LIKE ABOVE.IT IS 28335

When run to GpioDataRegs.GPASET.bit.GPIO19=1; the gpio18 and gpio19 change all.

0 leizhiguang lzg over 9 years ago in reply to leizhiguang lzg

Intellectual 540 points

GPIO20 and GPIO21 is the same,others GPIO has no such work

0 Vivek Singh over 9 years ago in reply to leizhiguang lzg

TI__Guru** 115271 points

Hi,

Please check on board if GPIO18 and GPIO19 are connected (either intentionally or due to error on board). GPIO data register reflects the value on the PIN and if PIN is not getting driven '1' then it'll still show value '0'. So please scope this PIN on the board.

Regards,

Vivek Singh