[汽车MCU – KEA] 关于S32K 按键中断问题

#include "S32K144.h" /* include peripheral declarations S32K144 */



#define PTB4     4                              /* Port PTB4, bit 4 :FRDM EVB output to red LED*/

#define PTD15    15                                /* Port PTD15, bit 15 :FRDM EVB input from BTN0 [SW2]*/



int idle_counter = 0;

int PTD15_flag_counter = 0;



void init_IRQs (void) {

        FSL_NVIC->ICPR[1] = 1 << (78 % 32);  /* IRQ78-PTD ch0: clr any pending IRQ*/

        FSL_NVIC->ISER[1] = 1 << (78 % 32);  /* IRQ78-PTD ch0: enable IRQ */

         FSL_NVIC->IP[78] = 0xA;              /* IRQ78-PTD ch0: priority 10 of 0-15*/

}



void Init_ports(void)

{

                                                        /* Enable clocks to peripherals (PORT modules) */

        PCC-> PCCn[PCC_PORTB_INDEX] = PCC_PCCn_CGC_MASK; /* Enable clock to PORT B */

        PTB->PDDR |= 1<<PTB4;       /* Port B4: Data Direction= output */

        PORTB->PCR[4] = 0x00000100; /* Port B4: MUX = GPIO */

}



void init_Key(void)

{

        /* Configure port D15 as INT input (BTN 0 [SW2] on EVB) */

        PCC-> PCCn[PCC_PORTD_INDEX] = PCC_PCCn_CGC_MASK; /* Enable clock to PORT D */

        PTD->PDDR &= ~(1<<PTD15);   /* Port D15: Data Direction= input (default) */

        PORTD->PCR[15] = 0x000A0102;

        /*Port D15: ISF flag and Interrupt on falling-edge, MUX = GPIO, Pull Enabled */

}



void disable_WDOG (void){

        WDOG->CNT=0xD928C520;         /*Unlock watchdog*/

        WDOG->TOVAL=0x0000FFFF;        /*Maximum timeout value*/

        WDOG->CS = 0x00002100;  /*Disable watchdog*/

}



int main(void)

{

          disable_WDOG();

          Init_ports();                                /*Configure ports*/

          init_IRQs();                                /*Enable GPIO interrupts and priorities*/

          init_Key();                                /*Initialize PTD15 as GPIO interrupts*/

          for(;;)

          {

                  idle_counter++;

          }

}



void PORTD_IRQHandler(void)

{

        PTD15_flag_counter++;

        PTB->PTOR |= 1<<4;                /* Toggle output on port B4 (blue LED) */

        PORTD->ISFR &= ~(1<<PTD15);

        PORTD->PCR[15] |= 0x01000000;

}

/*

 * hello_interrupts.c              Copyright NXP 2016

 * Description: Minimal interrupt example using LPIT0 chan 0 (vector 64)

 * 2016 Mar 04 S Mihalik - Initial Version

 *

 */



#include "derivative.h" /* include peripheral declarations S32K144 */

#include "clocks_and_modes.h" /* include peripheral declarations S32K144 */



int idle_counter = 0;           /* main loop idle counter */

int lpit0_ch0_flag_counter = 0; /* LPIT0 chan 0 timeout counter */



void init_IRQs (void) {

        FSL_NVIC->ICPR[1] = 1 << (48 % 32);  /* IRQ48-LPIT0 ch0: clr any pending IRQ*/

        FSL_NVIC->ISER[1] = 1 << (48 % 32);  /* IRQ48-LPIT0 ch0: enable IRQ */

         FSL_NVIC->IP[48] = 0xA;              /* IRQ48-LPIT0 ch0: priority 10 of 0-15*/

}



void init_ports (void) {

  PCC-> PCCn[PCC_PORTB_INDEX] = PCC_PCCn_CGC_MASK; /* Enable clock for PORT B */

  PTB->PDDR |= 1<<4;            /* Port B4:  Data Direction= output */

  PORTB->PCR[4] =  0x00000100;  /* Port B4:  MUX = ALT1, GPIO (to blue LED on EVB) */

}



void init_LPIT0 (void) {

  PCC->PCCn[PCC_LPIT0_INDEX] = PCC_PCCn_PCS(6);    /* Clock Src = 6 (SPLL2_DIV2_CLK)*/

  PCC->PCCn[PCC_LPIT0_INDEX] |= PCC_PCCn_CGC_MASK; /* Enable clk to LPIT0 regs */

  LPIT0->MCR = 0x00000001;    /* DBG_EN-0: Timer chans stop in Debug mode */

                              /* DOZE_EN=0: Timer chans are stopped in DOZE mode */

                              /* SW_RST=0: SW reset does not reset timer chans, regs */

                              /* M_CEN=1: enable module clk (allows writing other LPIT0 regs) */

  LPIT0->MIER = 0x00000001;   /* TIE0=1: Timer Interrupt Enabled fot Chan 0 */

  LPIT0->TVAL0 = 80000000;    /* Chan 0 Timeout period: 80M clocks */

  LPIT0->TCTRL0 = 0x00000001; /* T_EN=1: Timer channel is enabled */

                              /* CHAIN=0: channel chaining is disabled */

                              /* MODE=0: 32 periodic counter mode */

                              /* TSOT=0: Timer decrements immediately based on restart */

                              /* TSOI=0: Timer does not stop after timeout */

                              /* TROT=0 Timer will not reload on trigger */

                              /* TRG_SRC=0: External trigger soruce */

                              /* TRG_SEL=0: Timer chan 0 trigger source is selected*/

}

void disable_WDOG (void){

        WDOG->CNT=0xD928C520;         /*Unlock watchdog*/

        WDOG->TOVAL=0x0000FFFF;        /*Maximum timeout value*/

        WDOG->CS = 0x00002100;  /*Disable watchdog*/

}

int main(void) {

  disable_WDOG();

  init_ports();            /* Configure ports */

  init_SOSC_8MHz();        /* Initialize system oscilator for 8 MHz xtal */

  init_SPLL_80MHz();       /* Initialize SPLL to 80 MHz with 8 MHz SOSC */

  NormalRUNmode_80MHz();   /* Init clocks: 80 MHz SPLL & core, 40 MHz bus, 20 MHz flash */

  init_IRQs();             /* Enable desired interrupts and priorities */

  init_LPIT0();            /* Initialize PIT0 for 1 second timeout  */



  for (;;) {

    idle_counter++;

  }

}



void LPIT0_Ch0_IRQHandler (void) {

  lpit0_ch0_flag_counter++;         /* Increment LPIT0 timeout counter */

  PTB->PTOR |= 1<<4;                /* Toggle output on port D0 (blue LED) */

  LPIT0->MSR |= LPIT_MSR_TIF0_MASK; /* Clear LPIT0 timer flag 0 */

}