KEA8 Pull-up Disable

Robinwithu — Fri, 24 Apr 2015 15:42:57 GMT

Hello All,

I am having issue with TRK-KEA8 BOARD Pull-up Disable

#define PORT_PTA0 0

#define PORT_PTA1 1

#define PORT_PTA2 2

#define PORT_PTA3 3

#define PORT_PTA4 4

#define PORT_PTA5 5

#define PORT_PTA6 6

#define PORT_PTA7 7

#define PORT_PTB0 8

#define PORT_PTB1 9

#define PORT_PTB2 10

#define PORT_PTB3 11

#define PORT_PTB4 12

#define PORT_PTB5 13

#define PORT_PTB6 14

#define PORT_PTB7 15

void main(void)

{

asm("CPSID i"); // Disable Interrupt

ICS_C1|=ICS_C1_IRCLKEN_MASK; /* Enable the internal reference clock*/

ICS_C3= 0x90; /* Reference clock frequency = 39.0625 KHz*/

while(!(ICS_S & ICS_S_LOCK_MASK)); /* Wait for PLL lock, now running at 40 MHz (1024 * 39.0625Khz) */

ICS_C2|=ICS_C2_BDIV(1) ; /*BDIV=2, Bus clock = 20 MHz*/

ICS_S |= ICS_S_LOCK_MASK ; /* Clear Loss of lock sticky bit */

WDOG_CNT = 0x20C5; // write the 1st unlock word

WDOG_CNT = 0x28D9; // write the 2nd unlock word

WDOG_TOVALL = 10; // Write New Word in WDT : 10 x (1 / 1000) = 10 msec but cause of tolerance it's 16msec (Appx. +25 /-35 %)

WDOG_TOVALH = 0;

WDOG_CS2 = 0x01; // Select clock 1Khz ; to select 32 Khz clock we need to Enable in ICS_C1 register internal reference clock enable bit ICS_C1[IRCLKEN]

WDOG_CS1 = 0x80; // Enable WDT : Feed the Dog : Activate the Dog

SIM_SOPT = 0xC; // PTB4 Default to NMI function: PTB4 to Normal GPIO

GPIOA_PDDR = 0xF7F2; // Define PortA (A1-A3) all Pin As Output ; one is Output and Zero is Input

// After POR : Power on Reset The Port Pins are in High Impedance State

GPIOA_PIDR &= ~1 ; // configure PORTA0 pin as GPIO input, must clear PIDR bit

GPIOA_PIDR &= ~2048 ; // configure PORTB3 pin as GPIO input, must clear PIDR bit

// 0 and 11 are Register Bit to clear A0 and B3 refer GPIO Register Bit Assignment Datasheet Table 33-21

GPIOA_PDDR |= 0 << PORT_PTA0 ; // direction is INPUT , PORTA0

GPIOA_PDDR |= 0 << PORT_PTB3;

GPIOA_PDOR = 0x0000; // Initialise the PORTA, PORTB

PORT_PUEL &= 0 << PORT_PTA0 ;

PORT_PUEL |= 1 << PORT_PTA2 ; // Pull Enable on A0(Default Pull-up ENable Cause of programming Pin), A2 and A3 0X0000D

PORT_PUEL |= 1 << PORT_PTA3 ;

PORT_PUEL & = 0 << PORT_PTA2 ; // Disable pull-up

PORT_PUEL &= 0 << PORT_PTA3 ;

}

Problem:

It's a part of my code , i am trying to disable the Individual Pull-Up , as i my case first enabled Pull up on PORTA2 and PORTA3 and then Disabled (just for debugging but in real code Pull-up disable is after 20msec) , it disable both the Pull-Up PORT bits PORTA2 and PORTA3 both at the same time i.e. by first instruction of pull-up disable PORT_PUEL & = 0 << PORT_PTA2 . it's not disabling the individual Bits , instant of that whole Port Pull-up? why?

Info : Both pins are Open Drain pins and having SDA/SCL Structure (Please refer page number 142 OF KEA8 Sub Family Reference manual)

Note: I test it on LED and also seen on Debugging register getting same result as i mentioned above.

Re: KEA8 Pull-up Disable

mjbcswitzerland — Fri, 24 Apr 2015 16:05:44 GMT

Robin

PORT_PUEL &= 0 << PORT_PTA3 ;

is the same as

PORT_PUEL &= 0;

is the same as

PORT_PUEL = 0;

therefore it disables all pull-ups

I think you wanted to write

PORT_PUEL &= ~(1 << PORT_PTA3) ;

Regards

Mark

Kinetis: µTasker Kinetis support

KE: µTasker FRDM-KE02Z support / µTasker FRDM-KE02Z40M support / µTasker FRDM-KE06Z support

For the complete "out-of-the-box" Kinetis experience and faster time to market

Re: KEA8 Pull-up Disable

Robinwithu — Mon, 27 Apr 2015 07:36:14 GMT

Thanks Mark,

Mfg

Robin

Re: KEA8 Pull-up Disable

Robinwithu — Wed, 06 May 2015 12:00:28 GMT

Hello Mark,

I need Assembly Instructions set to know the bus cycles for each Assembly instructions for KEA8 controller , please can you tell me where i will find ? It's not given in datasheet :smileysad:

Thanks in Advance.

MFG

Robin

Re: KEA8 Pull-up Disable

mjbcswitzerland — Wed, 06 May 2015 12:26:08 GMT

Robin

For information about the core you need to use ARM documentation.

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0432c/CHDCICDF.html

Regards

Mark

Kinetis: µTasker Kinetis support

KE: µTasker FRDM-KE02Z support / µTasker FRDM-KE02Z40M support / µTasker FRDM-KE06Z support

For the complete "out-of-the-box" Kinetis experience and faster time to market

Re: KEA8 Pull-up Disable

Robinwithu — Wed, 06 May 2015 12:32:56 GMT

Thank you Mark :smileyhappy:

Have a nice Day !!!

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