dz60_init.c

codewarrior demo9s08dz60 演示主程序

/*******************************************************************************/
/*
Copyright (c) 2007 Freescale Semiconductor
Freescale Confidential Proprietary
\file       DZ60_init.c
\brief      S08DZ60 initialization
\author     Freescale Semiconductor
\author     B05114
\version    0.1
\date       January/2008
*/
/*******************************************************************************/

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

/* Definitions and function prototypes */
#include "DZ60_init.h"

/*******************************************************************************/
/*
* \brief    Multipurpose Clock Generator initialization.
* \author   B05114
* \param    void
* \return   void
*/
void MCG_Init(void) 
{
  /* Common initialization of the write once registers */
  /* SOPT1: COPT=0,STOPE=0,SCI2PS=0,IICPS=0,??=0,??=0,??=0 */
  (SOPT1=0x00);                 
  /* SOPT2: COPCLKS=0,COPW=0,??=0,ADHTS=0,??=0,MCSEL=0 */
  (SOPT2=0x00);                 
  /* SPMSC1: LVWF=0,LVWACK=0,LVWIE=0,LVDRE=1,LVDSE=1,LVDE=1,??=0,BGBE=0 */
  (SPMSC1=0x1C);                
  /* SPMSC2: ??=0,??=0,LVDV=0,LVWV=0,PPDF=0,PPDACK=0,??=0,PPDC=0 */
  (SPMSC2=0x00);                
  /*  System clock initialization */
  MCGTRM = *(unsigned char*)0xFFAF;    /* Initialize MCGTRM register from a non volatile memory */
  MCGSC = *(unsigned char*)0xFFAE;     /* Initialize MCGSC register from a non volatile memory */
  /* MCGC2: BDIV=0,RANGE=1,HGO=0,LP=0,EREFS=1,ERCLKEN=1,EREFSTEN=0 */
  (MCGC2=0x26);                /* Set MCGC2 register */ 
  /* MCGC1: CLKS=2,RDIV=7,IREFS=0,IRCLKEN=1,IREFSTEN=0 */
  (MCGC1=0xBA);                /* Set MCGC1 register */ 
  while(!MCGSC_OSCINIT) {              /* Wait until external reference is stable */
  }
  while(MCGSC_IREFST) {                /* Wait until external reference is selected */
  }
  while((MCGSC & 0x0C) != 0x08) {      /* Wait until external clock is selected as a bus clock reference */
  }
  /* MCGC2: BDIV=0,RANGE=1,HGO=0,LP=1,EREFS=1,ERCLKEN=1,EREFSTEN=0 */
  (MCGC2=0x2E);                /* Set MCGC2 register */ 
  /* MCGC1: CLKS=2,RDIV=1,IREFS=0,IRCLKEN=1,IREFSTEN=0 */
  (MCGC1=0x8A);                /* Set MCGC1 register */ 
  /* MCGC3: LOLIE=0,PLLS=1,CME=0,??=0,VDIV=5 */
  (MCGC3=0x45);                /* Set MCGC3 register */ 
  /* MCGC2: LP=0 */
  (MCGC2&=0xf7);             
  while(!MCGSC_PLLST) {                /* Wait until PLL is selected */
  }
  while(!MCGSC_LOCK) {                 /* Wait until PLL is locked */
  }
  /* MCGC1: CLKS=0,RDIV=1,IREFS=0,IRCLKEN=1,IREFSTEN=0 */
  (MCGC1=0x0A);                /* Set MCGC1 register */ 
  while((MCGSC & 0x0C) != 0x0C) {      /* Wait until PLL clock is selected as a bus clock reference */
  }                          
}


/*******************************************************************************/
/*
* \brief    DZ60 demo board GPIO settings
* \author   B05114
* \param    void
* \return   void
*/
void GPIO_Init(void)
{     
    PTBDD_PTBDD3 = 1;  /* PTB3 is output to LED2 */
    PTBDD_PTBDD6 = 0;  /* PTB6 is input from push-button PB1 */
    PTBDD_PTBDD7 = 0;  /* PTB7 is input from push-button PB2 */
                                                                                
    PTCDD_PTCDD5 = 1;   /* PTC5 is output to LED1 */  
}

/*******************************************************************************/
/*
* \brief    Timer TPM1 configuration
* \author   B05114
* \param    void
* \return   void
*/
void TPM1_Init(void)
{   
    TPM1SC_PS = PS_DIV;     /* Prescaler selection */
    TPM1SC_CLKSx = BUS_CLK; /* Clock source selection */                    
    TPM1SC_TOIE = 1;        /* Timer overflow interrupt enabled */       
}  

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

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