KEA-128 GPIO at 3.3volts

[vignesh_vb_7]

can we operate the GPIO of KEA-128 with 3.3 volts?what should i do for that?

[Paul_Tian]

Hi,

Yes, you can operation GPIO of KEA128 with 3.3V. You need to provide 3.3V to VDD.

If you have to provide 5V to VDD, you have to add a transceiver to change the signal voltage.

Hope my reply can help you.

Best Regards

Paul

[vignesh_vb_7]

Should we connect all the 3 VDD pins(pin8 , pin49 and pin 70) to 3.3 volts if I want to operate the GPIO at 3.3 volts?

Should I connect all the 3 Vss to ground as well for getting 3.3 volts at GPIO's?

[vignesh_vb_7]

Hi,

I gave VDD(PTF0) as 3.3v and flashed a code to make a GPIO as 3.3 volts but it still remained as 5 volts?

The code is

#include "GPIO.h"

int main(void)

{

  int counter = 0;

  CONFIG_PIN_AS_GPIO(d,PTD5,OUTPUT);

  OUTPUT_SET(d,PTD5);

  for(;;) {  

    counter++;

  }

  return 0;

}

/******************************************************************************* GPIO.h file **********************************************************************************/

enum GPIOA {

  PTA0,PTA1,PTA2,PTA3,PTA4,PTA5,PTA6,PTA7,

  PTB0,PTB1,PTB2,PTB3,PTB4,PTB5,PTB6,PTB7,

  PTC0,PTC1,PTC2,PTC3,PTC4,PTC5,PTC6,PTC7,

  PTD0,PTD1,PTD2,PTD3,PTD4,PTD5,PTD6,PTD7

};

enum GPIOB {

  PTE0,PTE1,PTE2,PTE3,PTE4,PTE5,PTE6,PTE7,

  PTF0,PTF1,PTF2,PTF3,PTF4,PTF5,PTF6,PTF7,

  PTG0,PTG1,PTG2,PTG3,PTG4,PTG5,PTG6,PTG7,

  PTH0,PTH1,PTH2,PTH3,PTH4,PTH5,PTH6,PTH7

};

enum GPIOC {

  PTI0,PTI1,PTI2,PTI3,PTI4,PTI5,PTI6,PTI7

};

/************************************************************************************************************************************************/

#define a  A

#define b  A

#define c  A

#define d  A

#define e  B

#define f  B

#define g  B

#define h  B

#define i C

#define OUTPUT  1

#define INPUT 0

#define CONFIG_PIN_AS_GPIO(port,port_pin,mode)    XCONFIG_PIN_AS_GPIO(port,port_pin,mode)

#define XCONFIG_PIN_AS_GPIO(port,port_pin,mode)   (mode == 0) ? (GPIO##port##_PDDR |= 0 << port_pin) : (GPIO##port##_PDDR |= 1 << port_pin)

#define ENABLE_INPUT(port,port_pin) XENABLE_INPUT(port,port_pin)

#define XENABLE_INPUT(port,port_pin) GPIO##port##_PIDR ^= 1<<port_pin

#define ENABLE_PULLUP(port,port_pin) XENABLE_PULLUP(port,port_pin)

#define XENABLE_PULLUP(port,port_pin) PORT_PUE0 |= PORT_PUE0_PT##port##PE##port_pin##_MASK

#define OUTPUT_SET(port,register_num) XOUTPUT_SET(port,register_num)

#define XOUTPUT_SET(port,register_num) GPIO##port##_PSOR |=1<<register_num

#define OUTPUT_CLEAR(port,register_num) XOUTPUT_CLEAR(port,register_num)

#define XOUTPUT_CLEAR(port,register_num) GPIO##port##_PCOR |=1<<register_num

#define OUTPUT_TOGGLE(port,register_num) XOUTPUT_TOGGLE(port,register_num)

#define XOUTPUT_TOGGLE(port,register_num) GPIO##port##_PTOR |=1<<register_num

#define CONFIG_PIN_AS_FGPIO(port,port_pin,mode)    XCONFIG_PIN_AS_FGPIO(port,port_pin,mode)

#define XCONFIG_PIN_AS_FGPIO(port,port_pin,mod