cpu.c

用C语言写的CCD摄像头数据采集源代码

/** ###################################################################
**     THIS BEAN MODULE IS GENERATED BY THE TOOL. DO NOT MODIFY IT.
**     Filename  : Cpu.C
**     Project   : CCDBIT
**     Processor : MC9S12DG128BCPV
**     Beantype  : MC9S12DG128_112
**     Version   : Bean 01.167, Driver 01.20, CPU db: 2.87.280
**     Datasheet : 9S12DT128BDGV1/D V01.05
**     Compiler  : Metrowerks HC12 C Compiler
**     Date/Time : 2008-3-23, AM 09:59
**     Abstract  :
**         This bean "MC9S12DG128_112" implements properties, methods,
**         and events of the CPU.
**     Settings  :
**
**     Contents  :
**         EnableInt   - void Cpu_EnableInt(void);
**         DisableInt  - void Cpu_DisableInt(void);
**         SetWaitMode - void Cpu_SetWaitMode(void);
**         SetStopMode - void Cpu_SetStopMode(void);
**         Delay100US  - void Cpu_Delay100US(word us100);
**
**     (c) Copyright UNIS, spol. s r.o. 1997-2005
**     UNIS, spol. s r.o.
**     Jundrovska 33
**     624 00 Brno
**     Czech Republic
**     http      : www.processorexpert.com
**     mail      : [e-mail]
** ###################################################################*/

/* MODULE Cpu. */

#include "PWM8.h"
#include "Cpu.h"

#define CGM_DELAY  3327UL

#pragma DATA_SEG DEFAULT

/* Global variables */
volatile byte CCR_reg;                 /* Current CCR reegister */
byte CpuMode = HIGH_SPEED;             /* Current speed mode */


/*
** ===================================================================
**     Method      :  Cpu_Interrupt (bean MC9S12DG128_112)
**
**     Description :
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
#pragma CODE_SEG __NEAR_SEG NON_BANKED

ISR(Cpu_Interrupt)
{
}

#pragma CODE_SEG DEFAULT

/*
** ===================================================================
**     Method      :  Cpu_Delay100US (bean MC9S12DG128_112)
**
**     Description :
**         This method realizes software delay. The length of delay
**         is at least 100 microsecond multiply input parameter
**         [us100]. As the delay implementation is not based on real
**         clock, the delay time may be increased by interrupt
**         service routines processed during the delay. The method
**         is independent on selected speed mode.
**     Parameters  :
**         NAME            - DESCRIPTION
**         us100           - Number of 100 us delay repetitions.
**                         - The value of zero results in maximal 
**                           delay of approx. 6.5 seconds.
**     Returns     : Nothing
** ===================================================================
*/
#pragma CODE_SEG __NEAR_SEG NON_BANKED
#pragma NO_ENTRY
#pragma NO_EXIT
#pragma MESSAGE DISABLE C5703
void Cpu_Delay100US(word us100)
{
  /* Total irremovable overhead: 13 cycles */
  /* ldd:  2 cycles overhead (load parameter into register) */
  /* jsr:  4 cycles overhead (call this function) */
  /* rts:  7 cycles overhead (return from this function) */

  asm {
    loop:
    /* 100 us delay block begin */
    /*
     * Delay
     *   - requested                  : 100 us @ 25MHz,
     *   - possible                   : 2500 c, 100000 ns
     *   - without removable overhead : 2497 c, 99880 ns
     */
    pshd                               /* (2 c: 80 ns) backup D */
    ldd #830                           /* (2 c: 80 ns) number of iterations */
    label0:
    dbne d, label0                     /* (3 c: 120 ns) repeat 830x */
    puld                               /* (3 c: 120 ns) restore D */
    /* 100 us delay block end */
    dbne d, loop                       /* us100 parameter is passed via D register */
    rts                                /* return from subroutine */
  }
}
#pragma CODE_SEG DEFAULT

/*
** ===================================================================
**     Method      :  Cpu_DisableInt (bean MC9S12DG128_112)
**
**     Description :
**         Disable maskable interrupts
**     Parameters  : None
**     Returns     : Nothing
** ===================================================================
*/
/*
void Cpu_DisableInt(void)

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

/*
** ===================================================================
**     Method      :  Cpu_EnableInt (bean MC9S12DG128_112)
**
**     Description :
**         Enable maskable interrupts
**     Parameters  : None
**     Returns     : Nothing
** ===================================================================
*/
/*
void Cpu_EnableInt(void)

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

/*
** ===================================================================
**     Method      :  Cpu_SetStopMode (bean MC9S12DG128_112)
**
**     Description :
**         Set low power mode - Stop mode.
**         For more information about the stop mode see
**         documentation of this CPU.
**     Parameters  : None
**     Returns     : Nothing
** ===================================================================
*/
/*
void Cpu_SetStopMode(void)

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

/*
** ===================================================================
**     Method      :  Cpu_SetWaitMode (bean MC9S12DG128_112)
**
**     Description :
**         Set low power mode - Wait mode.
**         For more information about the wait mode see
**         documentation of this CPU.
**         Release from Wait mode: Reset or interrupt
**     Parameters  : None
**     Returns     : Nothing
** ===================================================================
*/
/*
void Cpu_SetWaitMode(void)

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

/*
** ===================================================================
**     Method      :  _EntryPoint (bean MC9S12DG128_112)
**
**     Description :
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
extern void _Startup(void);            /* Forward declaration of external startup function declared in file Start12.c */
#pragma CODE_SEG __NEAR_SEG NON_BANKED

#define INITRG_ADR  0x0011             /* Register map position register */

#pragma NO_FRAME
#pragma NO_EXIT
void _EntryPoint(void)
{
  /*** ### MC9S12DG128BCPV "Cpu" init code ... ***/
  /*** PE initialization code after reset ***/
  /* Initialization of the registers INITRG, INITRM, INITEE is done to protect them to be written accidentally later by the application */
  *(byte*)INITRG_ADR = 0;              /* Set the register map position */
  asm("nop");                          /* nop instruction */
  /* INITRM: RAM15=0,RAM14=0,RAM13=1,RAM12=0,RAM11=0,??=0,??=0,RAMHAL=0 */
  setReg8(INITRM, 32);                 /* Set the RAM map position */ 
  /* INITEE: EE15=0,EE14=0,EE13=0,EE12=1,??=1,??=0,??=0,EEON=1 */
  setReg8(INITEE, 25);                 /* Set the EEPROM map position */ 
  /* MISC: ??=0,??=0,??=0,??=0,EXSTR1=1,EXSTR0=1,ROMHM=0,ROMON=1 */
  setReg8(MISC, 13);                    
  /* EBICTL: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,ESTR=0 */
  setReg8(EBICTL, 0);                   
  /* PEAR: NOACCE=0,??=0,PIPOE=0,NECLK=0,LSTRE=0,RDWE=0,??=0,??=0 */
  setReg8(PEAR, 0);                     
  /* CLKSEL: PLLSEL=0,PSTP=0,SYSWAI=0,ROAWAI=0,PLLWAI=0,CWAI=0,RTIWAI=0,COPWAI=0 */
  setReg8(CLKSEL, 0);                  /* Select clock source from XTAL and set bits in CLKSEL reg. */ 
  /* PLLCTL: PLLON=0 */
  clrReg8Bits(PLLCTL, 64);             /* Disable the PLL */ 
  /* SYNR: ??=0,??=0,SYN5=0,SYN4=1,SYN3=1,SYN2=0,SYN1=0,SYN0=0 */
  setReg8(SYNR, 24);                   /* Set the multiplier register */ 
  /* REFDV: ??=0,??=0,??=0,??=0,REFDV3=1,REFDV2=1,REFDV1=1,REFDV0=1 */
  setReg8(REFDV, 15);                  /* Set the divider register */ 
  /* PLLCTL: CME=0,PLLON=1,AUTO=1,ACQ=1,??=0,PRE=0,PCE=0,SCME=0 */
  setReg8(PLLCTL, 112);                 
  while(!CRGFLG_LOCK) {};              /* Wait */
  /* CLKSEL: PLLSEL=1 */
  setReg8Bits(CLKSEL, 128);            /* Select clock source from PLL */ 
  /*** End of PE initialization code after reset ***/
  __asm("jmp _Startup");               /* Jump to C startup code */
}

#pragma CODE_SEG DEFAULT

/*
** ===================================================================
**     Method      :  PE_low_level_init (bean MC9S12DG128_112)
**
**     Description :
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
void PE_low_level_init(void)
{
  /* Common initialization of the CPU registers */
  /* PWME: PWME7=0,PWME6=0,PWME5=0,PWME4=0,PWME3=0,PWME2=0,PWME1=0,PWME0=0 */
  setReg8(PWME, 0);                     
  /* PWMCTL: CON01=1,PSWAI=0,PFRZ=0 */
  clrSetReg8Bits(PWMCTL, 12, 16);       
  /* PWMCAE: CAE1=0 */
  clrReg8Bits(PWMCAE, 2);               
  /* PWMPOL: PPOL1=0 */
  clrReg8Bits(PWMPOL, 2);               
  /* PTP: PTP1=0 */
  clrReg8Bits(PTP, 2);                  
  /* DDRP: DDRP1=1 */
  setReg8Bits(DDRP, 2);                 
  /* PWMSDN: PWMIF=0,PWMIE=0,PWMRSTRT=0,PWMLVL=0,??=0,PWM7IN=0,PWM7INL=0,PWM7ENA=0 */
  setReg8(PWMSDN, 0);                   
  /* TSCR1: TSWAI=0,TSFRZ=0 */
  clrReg8Bits(TSCR1, 96);               
  /* ICSYS: SH37=0,SH26=0,SH15=0,SH04=0,TFMOD=0,PACMX=0,BUFEN=0,LATQ=0 */
  setReg8(ICSYS, 0);                    
  /* MCCTL: MODMC=1 */
  setReg8Bits(MCCTL, 64);               
  /* ### MC9S12DG128_112 "Cpu" init code ... */

  /* ### Programable pulse generation "PWM8" init code ... */
  PWM8_Init();
  /* INTCR: IRQEN=0 */
  clrReg8Bits(INTCR, 64);              /* Disable the IRQ interrupt. IRQ interrupt is enabled after CPU reset by default. */ 
  __EI();                              /* Enable interrupts */
}

/* END Cpu. */

/*
** ###################################################################
**
**     This file was created by UNIS Processor Expert 2.96 [03.76]
**     for the Freescale HCS12 series of microcontrollers.
**
** ###################################################################
*/