Freedom Board KL25Z basic port pin operation

rkyrlach — Sun, 10 Feb 2013 04:44:42 GMT

Hello,

I am trying to get my feet on the ground with the little $12 Freedom board with basic bit IO.

Debug shows the bits are changing but nothing happens... no LED... nothing on the meter.

Obviously I am missing something...

please help.

thanks

Richard

CODE:

typedef union { unsigned long all;

struct {

unsigned long PIN0:1;

unsigned long PIN1:1;

unsigned long PIN2:1;

unsigned long PIN3:1;

unsigned long PIN4:1;

unsigned long PIN5:1;

unsigned long PIN6:1;

unsigned long PIN7:1;

unsigned long PIN8:1;

unsigned long PIN9:1;

unsigned long PIN10:1;

unsigned long PIN11:1;

unsigned long PIN12:1;

unsigned long PIN13:1;

unsigned long PIN14:1;

unsigned long PIN15:1;

unsigned long PIN16:1;

unsigned long PIN17:1;

unsigned long PIN18:1;

unsigned long PIN19:1;

unsigned long PIN20:1;

unsigned long PIN21:1;

unsigned long PIN22:1;

unsigned long PIN23:1;

unsigned long PIN24:1;

unsigned long PIN25:1;

unsigned long PIN26:1;

unsigned long PIN27:1;

unsigned long PIN28:1;

unsigned long PIN29:1;

unsigned long PIN30:1;

unsigned long PIN31:1;

}bit;

}port_t;

#define P_A ((port_t *) 0x400ff000)

#define P_A_S ((port_t *) 0x400ff004)

#define P_A_C ((port_t *) 0x400ff008)

#define P_A_T ((port_t *) 0x400ff00C)

#define P_A_I ((port_t *) 0x400ff010)

#define P_A_D ((port_t *) 0x400ff014)

#define P_B ((port_t *) 0x400ff040)

#define P_B_S ((port_t *) 0x400ff044)

#define P_B_C ((port_t *) 0x400ff048)

#define P_B_T ((port_t *) 0x400ff04C)

#define P_B_I ((port_t *) 0x400ff050)

#define P_B_D ((port_t *) 0x400ff054)

#define P_C ((port_t *) 0x400ff080)

#define P_C_S ((port_t *) 0x400ff084)

#define P_C_C ((port_t *) 0x400ff088)

#define P_C_T ((port_t *) 0x400ff08C)

#define P_C_I ((port_t *) 0x400ff090)

#define P_C_D ((port_t *) 0x400ff094)

#define P_D ((port_t *) 0x400ff0C0)

#define P_D_S ((port_t *) 0x400ff0C4)

#define P_D_C ((port_t *) 0x400ff0C8)

#define P_D_T ((port_t *) 0x400ff0CC)

#define P_D_I ((port_t *) 0x400ff0D0)

#define P_D_D ((port_t *) 0x400ff0D4)

#define P_E ((port_t *) 0x400ff100)

#define P_E_S ((port_t *) 0x400ff104)

#define P_E_C ((port_t *) 0x400ff108)

#define P_E_T ((port_t *) 0x400ff10C)

#define P_E_I ((port_t *) 0x400ff110)

#define P_E_D ((port_t *) 0x400ff114)

int main(void)

{

unsigned long b1;

unsigned long cnt=0;

b1=P_D_D->bit.PIN1=1;

b1=P_B_D->bit.PIN0=1;

b1=P_E_D->bit.PIN20=1;

while(1)

{

for(cnt = 0; cnt < 126000; cnt++)

{

b1=P_D->bit.PIN1=0;

b1=P_B->bit.PIN0=0;

b1=P_E->bit.PIN20=0;

}

for(cnt = 0; cnt < 126000; cnt++)

{

b1=P_D->bit.PIN1=1;

b1=P_B->bit.PIN0=1;

b1=P_E->bit.PIN20=1;

}

Re: Freedom Board KL25Z basic port pin operation

rkyrlach — Tue, 12 Feb 2013 23:18:20 GMT

found the answer... I needed some initializations:

/* disable COP */

SIM_COPC = 0;

/* enable clocks for PORTB, PORTD and PORTE */

SIM_SCGC5 |= SIM_SCGC5_PORTB_MASK;

SIM_SCGC5 |= SIM_SCGC5_PORTD_MASK;

SIM_SCGC5 |= SIM_SCGC5_PORTE_MASK;

/* set B18, B19, D1 to GPIO */

PORTB_PCR18 = PORT_PCR_MUX(1);

PORTB_PCR19 = PORT_PCR_MUX(1);

PORTD_PCR1 = PORT_PCR_MUX(1);

PORTB_PCR0 = PORT_PCR_MUX(1);

PORTE_PCR20 = PORT_PCR_MUX(1);

works now

Re: Freedom Board KL25Z basic port pin operation

adriansc — Wed, 13 Feb 2013 16:18:30 GMT

Hi,

Good luck with your project!! That is right, all the modules need its clock gate enable and SIM_SCGCx contains the field to do that for each module.

Also each pin has different functions that is why you need to configure the Pin Assignments.

Regards.

Re: Freedom Board KL25Z basic port pin operation

rkyrlach — Wed, 13 Feb 2013 17:36:19 GMT

thanks

On Wed, Feb 13, 2013 at 11:19 AM, Adrian Sanchez Cano <

topic Freedom Board KL25Z basic port pin operation in Kinetis Microcontrollers

Freedom Board KL25Z basic port pin operation

Re: Freedom Board KL25Z basic port pin operation

Re: Freedom Board KL25Z basic port pin operation

Re: Freedom Board KL25Z basic port pin operation