ledapp.c

LED APPLICATION MCF51JM

/*!
 * \file    ledapp.c
 * \brief   FTF Badge Example Project
 * \version $Revision: 1.2 $
 * \author  Anthony Huereca
 */

#include "ledapp.h"


/*******************************************************************/
/*!
 * Main loop
 */
void LedApp(void) 
{

  /* Highly recommend to include this function to correctly set I/O pins, 
     and put accelerometer and touch sensors in low power modes */
  sys_init();  

  /* Turn on RTC module */
  SCGC2_RTC=1; 

  /* Set RTC to timeout once a second based on 1khz internal clock (LPO) */   
  /* See Table 17-6 in MCF51JM128RM */
  RTCMOD = 0x00;
  RTCSC  = 0x1F; 
   
  EnableInterrupts; 

  /* Let Green LED blink on and off, and display touches on Matrix LED's */
  /* See functions rtc_interrupt in this file, and IRQ_ISR in mpr083.c */
  while(1) 
  {
    asm("stop #0x2000");
  }
}
 
 
 
/*******************************************************************/
/*!
 * Initialize system GPIO pins, clock, touch sensor, accelerometer, and USB
 */
void sys_init (void) 
{
    /* Disables COP; Enable STOP instruction */
    SOPT1 = 0x20;
    
    /* Disable low-voltage detects */
    SPMSC1 = 0x00;
    
    /* Use Stop3 Mode */
    SPMSC2 = 0x00;   
   
    /* Enable pullups */
    PTAPE = 0xFF; 
    PTBPE = 0xFF; 
  //PTCPE = 0xFF;  //Don't pull up PortC
    PTDPE = 0xFF; 
    PTEPE = 0xFF; 
    PTFPE = 0xFB;  //Don't pull up PTF2
    PTGPE = 0xFF; 


    /* Initialize port data so LED Matrix is OFF by default */
    PTED  = 0xFF; /* set PORTE output data to all 1's */
    PTDD  = 0xFF; /* set PORTD output data to all 1's */
    PTAD  = 0x00; /* set PORTA output data to all 0's */
    PTEDD = 0xFF; /* set PortE to output */
    PTDDD = 0xFF; /* set PortD to output */ 
    PTADD = 0xFF; /* set PortA to output */


    /* PORTB */
    PTBD_PTBD0 = 0;  /* No Connect */
    PTBD_PTBD1 = 0;  /* No Connect */
    PTBD_PTBD2 = 0;  /* No Connect */
    PTBD_PTBD3 = 0;  /* No Connect */ 
    PTBDD=0x0F;    
    
    /* PORTC */
    PTCD_PTCD0 = 0;     /* I2C pin */
    PTCD_PTCD1 = 0;     /* I2C pin */
    IR = 1;             /* IR off */
    MMA7260_SLEEP = 0;  /* Put the accelerometer to sleep for now */
    MMA7260_GSEL1 = 0;  /* Set for 1.5G */
    MMA7260_GSEL2 = 0;  /* 00 = 1.5G, 01 = 2.0G, 10 = 4.0G, 11 = 6.0G */
    MPR083_ATTN = 1;    /* Don't request attention from MPR083 */
    PTCDD=0xFF;
    
    /* PORTF */
    LED_RED = OFF; /* Turn off Red LED */
    LED_GRN = OFF; /* Turn off Green LED */
    SOUNDER = 0;   /* Turn off Sounder */
    PTFD_PTFD3=0;  /* No Connect */ 
    PTFD_PTFD4=0;  /* No Connect */
    PTFD_PTFD5=0;  /* No Connect */
    PTFD_PTFD6=0;  /* No Connect */
    PTFD_PTFD7=0;  /* No Connect */ 
    PTFDD=0xFF;    

    /* PORTG */
    MC3467X_EN = 1; /* Disable battery charging */
    PTGD_PTGD3 = 0; /* No Connect */
    
    PTGDD_PTGDD0=0; /* CHG Signal on Charger*/
    PTGDD_PTGDD1=0; /* PPR Signal on Charger*/
    PTGDD_PTGDD2=1; /* EN Signal on Charger*/
    PTGDD_PTGDD3=1; /* No Connect */
    PTGDD_PTGDD4=0; /* Xtal */
    PTGDD_PTGDD5=0; /* extal */
    
    
    clock_init_battery(); /* Use external Crystal at 12MHz (BLPE mode) */   
     
    /* Initialize the touch sensor */
    MPR083_init();
 
    /* If running off battery, turn off all clocks except IRQ and KBI */ 
    if (MC3467X_PPR)   
    {
      SCGC1=0x00;       
      SCGC2=0x30; 
      SCGC3=0x00;     
    } 
}


interrupt VectorNumber_Vrtc void rtc_interrupt(void)
{
  PTFD_PTFD1=~PTFD_PTFD1;
  
  /* Clear the interrupt flag */
  RTCSC |= 0x80;  
}


/*******************************************************************/
/*!
 * Initialize clock when running off battery power for low-power
 */
void clock_init_battery(void) 
{
    MCGC2 = 0x66;   /* BUS dive by 2, Range is high, oscillator */      
    while (MCGSC_OSCINIT == 0)
      ;

    MCGC1 = 0x98;   /* CLKS = 10 -> external reference clock. */    /* RDIV = 3 -> 12MHz/8=1.5 MHz */
    MCGC2_ERCLKEN=0;
    /* wait for mode change to be done */
    while (MCGSC_IREFST != 0)
      ;
    while (MCGSC_CLKST != 2)
      ;

    MCGC2_HGO=0; 
  
    MCGC3_PLLS=1;
    
    MCGC2_LP=1;  /* Turn off FLL and PLL */
    
    MCGC2_BDIV=3; /* Divide clock by 8: 12Mhz/8=1.5MHz */
}