cpu.c

GCC 做的MOTOROLA 的单片机 振荡程序

/** ###################################################################
**     THIS BEAN MODULE IS GENERATED BY THE TOOL. DO NOT MODIFY IT.
**     Filename  : Cpu.C
**     Project   : LowFreqSG
**     Processor : MC68HC908LV8CFA
**     Beantype  : MC68HC908LV8_52
**     Version   : Bean 01.078, Driver 01.36, CPU db: 2.89.060
**     Datasheet : MC68HC908LV8 Rev. 2 12/2005
**     Compiler  : CodeWarrior HC08 C Compiler
**     Date/Time : 2006-9-6, 11:29
**     Abstract  :
**         This bean "MC68HC908LV8_52" implements properties, methods,
**         and events of the CPU.
**     Settings  :
**         Clock setting
**             External clock      : 0.032768 MHz
**             CPU mode selection  : 1
**             Initialization interrupt priority : 0
**             Stop instruction enabled : no
**             LVI module          : no
**
**         Speed modes
**             High speed clock    : Main clock frequency / 1
**             Internal bus clock  : 7.995392 MHz
**             Low speed mode      : Disabled
**             Slow speed mode     : Disabled
**     Contents  :
**         EnableInt  - void Cpu_EnableInt(void);
**         DisableInt - void Cpu_DisableInt(void);
**
**     (c) Copyright UNIS, spol. s r.o. 1997-2006
**     UNIS, spol. s r.o.
**     Jundrovska 33
**     624 00 Brno
**     Czech Republic
**     http      : www.processorexpert.com
**     mail      : [e-mail]
** ###################################################################*/

/* MODULE Cpu. */

#include "LCD1.h"
#include "TO1.h"
#include "PE_Types.h"
#include "PE_Error.h"
#include "PE_Const.h"
#include "IO_Map.h"
#include "Cpu.h"

#define CGM_DELAY  0xFFUL
/* Global variables */
volatile byte CCR_reg;                 /* Current CCR register */
byte CpuMode = HIGH_SPEED;             /* Current speed mode */

/*
** ===================================================================
**     Method      :  Cpu_Interrupt (bean MC68HC908LV8_52)
**
**     Description :
**         This ISR services unhandled interrupt vectors.
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
ISR(Cpu_Interrupt)
{
/* The following code is generated from the 'Unhandled interrupt code' */
/* property on the 'Build option tab' of the CPU bean                  */
/* (can be modified by the user)                                       */
  asm {
    swi
  }
}

/*
** ===================================================================
**     Method      :  Cpu_DisableInt (bean MC68HC908LV8_52)
**
**     Description :
**         Disables maskable interrupts
**     Parameters  : None
**     Returns     : Nothing
** ===================================================================
*/
/*
void Cpu_DisableInt(void)

**      This method is implemented as macro in the header module. **
*/

/*
** ===================================================================
**     Method      :  Cpu_EnableInt (bean MC68HC908LV8_52)
**
**     Description :
**         Enables maskable interrupts
**     Parameters  : None
**     Returns     : Nothing
** ===================================================================
*/
/*
void Cpu_EnableInt(void)

**      This method is implemented as macro in the header module. **
*/

/*
** ===================================================================
**     Method      :  _EntryPoint (bean MC68HC908LV8_52)
**
**     Description :
**         Initializes the whole system like timing and so on. At the end 
**         of this function, the C startup is invoked to initialize stack,
**         memory areas and so on.
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
extern void _Startup(void);            /* Forward declaration of external compiler startup function */
#pragma NO_FRAME
#pragma NO_EXIT
void _EntryPoint(void)
{
  /*### MC68HC908LV8_52 - system initialization */

  /* Common initialization of the write once registers */
  /* CONFIG1: COPRS=0,LVISTOP=0,LVIRSTD=0,LVIPWRD=1,??=0,SSREC=0,STOP=0,COPD=1 */
  setReg8(CONFIG1, 0x11);               
  /* CONFIG2: STOP_XCLKEN=0,??=0,PEE=1,PDE=1,PCEH=0,PCEL=1,LVISEL1=0,LVISEL0=1 */
  setReg8(CONFIG2, 0x35);               
  /* PCTL: BCS=0 */
  clrReg8Bits(PCTL, 0x10);             /* Select clock source from XTAL */ 
  /* PCTL: PLLON=0 */
  clrReg8Bits(PCTL, 0x20);             /* Disable the PLL */ 
  /* PCTL: PLLIE=0,PLLF=0,PLLON=0,BCS=0,PRE1=0,PRE0=0,VPR1=1,VPR0=0 */
  setReg8(PCTL, 0x02);                 /* Set VCO output Power-of-Two devider P=0 the VCO Power-of-Two multiplier E=2 */ 
  /* PMS: ??=0,??=0,??=0,??=0,MUL11=0,MUL10=0,MUL9=1,MUL8=1,MUL7=1,MUL6=1,MUL5=0,MUL4=1,MUL3=0,MUL2=0,MUL1=0,MUL0=0 */
  setReg16(PMS, 0x03D0);               /* Set the Feedback divider N=976 */ 
  /* PMRS: VRS7=1,VRS6=1,VRS5=0,VRS4=1,VRS3=0,VRS2=0,VRS1=0,VRS0=0 */
  setReg8(PMRS, 0xD0);                 /* Set the VCO Linear multiplier L=208 */ 
  /* PMDS: ??=0,??=0,??=0,??=0,RDS3=0,RDS2=0,RDS1=0,RDS0=1 */
  setReg8(PMDS, 0x01);                 /* Set the Reference clock devider R=1 */ 
  /* PBWC: AUTO=1,LOCK=0,ACQ=0,??=0,??=0,??=0,??=0,??=0 */
  setReg8(PBWC, 0x80);                 /* Select the operating modes */ 
  /* PCTL: PLLON=1 */
  setReg8Bits(PCTL, 0x20);             /* Enable the PLL */ 
  while(!PBWC_LOCK) {                  /* Wait */
  }
  /* PCTL: BCS=1 */
  setReg8Bits(PCTL, 0x10);             /* Select clock source from PLL */ 
  __asm("nop");
  __asm("nop");
  /*** End of PE initialization code after reset ***/

  __asm   jmp _Startup ;               /* Jump to C startup code */
}

/*
** ===================================================================
**     Method      :  PE_low_level_init (bean MC68HC908LV8_52)
**
**     Description :
**         Initializes beans and provides common register initialization. 
**         The method is called automatically as a part of the 
**         application initialization code.
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
void PE_low_level_init(void)
{
  /* Common initialization of the CPU registers */
  /* DDRB: DDRB4=0 */
  clrReg8Bits(DDRB, 0x10);              
  /* HDB: HDB4=1 */
  setReg8Bits(HDB, 0x10);               
  /* LVISR: LVIIE=0 */
  clrReg8Bits(LVISR, 0x40);             
  /* ### MC68HC908LV8_52 "Cpu" init code ... */
  /* ### LCD "LCD1" init code ... */
  LCD1_Init();
  /* ### TimerOut "TO1" init code ... */
  TO1_Init();
  __DI();                              /* Disable interrupts */
}
/* Initialization of the CPU registers in FLASH */

/* END Cpu. */

/*
** ###################################################################
**
**     This file was created by UNIS Processor Expert 2.98 [03.80]
**     for the Freescale HC08 series of microcontrollers.
**
** ###################################################################
*/