lle_cpu.c

BCM 控制demo源代码

/*******************************************************************************/
/**
Copyright (c) 2007 Freescale Semiconductor
\file       lle_Cpu.c
\brief      S12XE CPU initialization
\author     Freescale Semiconductor
\author     B05114
\version    0.3
\date       February/ 2008
*/
/*******************************************************************************/

/** S12X derivative information */ 
#include <MC9S12XEP100.h> 

/** Common defines and macros */
#include <hidef.h>   

/** Variable types and common definitions */
#include "typedefs.h"  

/** Function prototypes */
#include "lle_Cpu.h"

/** XGATE definitions */
#include "lle_XGATE.h" 


/*******************************************************************************/
/**
* \brief    CPU core initial settings
* \author   B05114
* \param    void
* \return   void
*/
void lle_CPU_Init(void)
{
    /* COP module configuration */
    COPCTL = 0x00;              /* COP disable */
    
    MMCCTL1 = 1;    /* Enables Flash in the memory map */                  
    DIRECT = 0;     /* Default location for direct page */              
    IVBR = 0xFF;    /* Default vector base address */  
    
    /* Initialize the XGATE vector block and the XGVBR register */    
    XGVBR= (unsigned int)(void*__far)(XGATE_VectorTable - XGATE_VECTOR_OFFSET);    
    XGMCTL= 0xFBC1;     /* Enable XGATE mode and interrupts */             
            
    ENABLE_STOP();  /* Enable stop mode by executing stop instruction */       
}

/*******************************************************************************/
/**
* \brief    GPIO settings
* \author   B05114
* \param    void
* \return   void
*/
void lle_SetupPINS(void)
{      
    /* Port A */                        
    DDRA = 0x00;    /* Whole port is configured as input */    
    PUCR_PUPAE = 1; /* with pull-up enabled */                    
                                       
    /* Port B */       
    PORTB = 0x31;   
    PUCR_PUPBE = 0; /* Pull-up disabled */      
    DDRB = 0xDF;    /* only PB5 is input from SBC watchdog */
                                 
    /* Port C */
    PORTC = 0x0E;    
    PUCR_PUPCE = 0; /* Pull-up disabled */   
    DDRC = 0x3F;    /* PC1 to PC3 are CS outputs for e-switches */   
                    /* PC6 and PC7 are inputs for push-buttons S1 and S2 */    
    /* Port D */    
    PORTD = 0x30;
    PUCR_PUPDE = 0; /* Pull-up disabled */       
    DDRD = 0xFF;    /* Whole port is configured as output */
    
    /* Port E */
    PUCR_PUPEE = 1; /* Whole port as input with pull-ups enabled */
    DDRE = 0;       /* PE0 and PE1 are interrupt inputs, remaining pins are NC */       
    
    /* Port K */     
    PORTK = 0x00;    
    PUCR_PUPKE = 0; /* Pull-up disabled */   
    DDRK= 0xFF;     /* Whole port is configured as output */  
      
    RDRIV = 0xFF;   /* Reduced drive on ports A, B, C, D, E, K. */      
    
    /* Port T */        
    PTT = 0x00;     /* Initial state for e-switches control inputs */
    PERT = 0x00;    /* Pull-up disabled */           
    RDRT = 0xFF;    /* Reduced drive */         
    DDRT = 0xFF;    /* All outputs with reduced drive */    
    
    /* Port S */ 
    PTS = 0x8A;    
    PERS = 0x00;    /* Pull-up disabled */       
    RDRS = 0xFF;    /* Reduced drive */ 
    DDRS = 0xEA;    
           
    /* Port M */        
    PTM = 0xAA;             
    RDRM = 0xFF;    /* Reduced drive */
    PERM = 0x00;    /* Pull-up disabled */         
    DDRM = 0xAA; 
               
    /* Port P */         
    PTP = 0;                  
    PERP = 0x00;    /* Pull-up disabled */          
    RDRP = 0xFF;    /* Reduced drive */    
    DDRP = 0xF6;    /* PP4 and PP5 are outputs for H-Bridge control */
                    /* PP6 and PP7 are PWM outputs for COSS control */ 
    /* Port H */    
    PTH = 0x0A;
    RDRH = 0xFF;    /* Reduced drive for all outputs */
    PERH = 0x00;    /* Pull-up disabled */
    DDRH = 0x0A;    /* PH1 and PH3 are outputs (LIN_Tx) */
    
    /* Port J */
    PTJ = 0xA2;
    RDRJ = 0xFF;    /* Reduced drive for all outputs */
    PERJ = 0x00;    /* Pull-up disabled */
    DDRJ = 0xA2;    /* PJ1, PJ5 and PJ7 are outputs */ 
      
    /* Port AD0: PAD08 to PAD15 */    
    PT0AD0 = 0x00; 
    RDR0AD0 = 0xFF; /* Reduced drive */
    PER0AD0 = 0x00; /* Pull-up disabled */
    DDR0AD0 = 0xE0;  
    
    /* Port AD0: PAD00 to PAD07 */    
    PT1AD0 = 0x00;
    RDR1AD0 = 0xFF; /* Reduced drive */  
    PER1AD0 = 0x00; /* Pull-up disabled */
    DDR1AD0 = 0xC0;         
    
    /* Port AD1: PAD23 to PAD16 */    
    PT1AD1 = 0x00;
    RDR1AD1 = 0xFF;   /* Reduced drive */  
    PER1AD1 = 0x00;   /* Pull-up disabled */
    DDR1AD1 = 0xFF; 
    
    
    /* I/O ports not connected to external pins on 144-LQFP device */
    
    /* Port AD1: PAD24 to PAD31 */     
    PER0AD1 = 0xFF; /* Pull-up enabled */
    DDR0AD1 = 0x00; /* Port configured as input */   
    
    /* Port R */
    DDRR = 0x00;    /* All inputs with pull-up enabled */  
    PERR = 0xFF;
    
    /* Port L */
    DDRL = 0x00;    /* All inputs with pull-up enabled */  
    PERL = 0xFF;
    
    /* Port F */
    DDRF = 0x00;    /* All inputs with pull-up enabled */  
    PERF = 0xFF;                
}

/*******************************************************************************/
/**
* \brief    Interrupts configuration
* \author   B05114
* \param    void
* \return   void
*/
void lle_Interrupts_Init(void)
{    
    IRQCR_IRQEN = 0;    /* Disable IRQ detection */
    XIRQ_ENABLE();      /* Enable XIRQ */ 
    
    ENABLE_INTERRUPTS();                     
}

/*******************************************************************************/
/**
* \brief    SCI 2 configured @9600 bauds for FreeMASTER communication
* \author   B05114
* \param    void
* \return   void
*/
void lle_Init_SCI(void)
{
    /* SBR = SCI Bus Clock / (16 * Baud Rate)
       SBR = 40M/(16 * 9600) = 260.416 = 0x104  */    
    SCI2BD = 0x104;  
    
    SCI2CR1_SCISWAI = 1;    /* SCI2 disabled in wait mode */         
}

/*******************************************************************************/
/**
* \brief    Set S12XEP in wait mode
* \author   B05114
* \param    void
* \return   void
*/
void lle_MCU_Wait_Mode(void)
{         
    WAIT();    /* Execute wait macro */
}   

/*******************************************************************************/
/**
* \brief    Set S12XEP in pseudo-stop mode
* \author   B05114
* \param    void
* \return   void
*/

void lle_MCU_PseudoStop_Mode(void)
{ 
    SCI2CR2_RIE = 0;    /* Disable the SCI2 Rx interrupt */
    
    CLKSEL_PSTP = 1;    /* Oscillator continues running in stop mode */
	STOP();             /* execute stop macro */ 
}   


/*******************************************************************************/
/**
* \brief    Set S12XEP in full-stop mode
* \author   B05114
* \param    void
* \return   void
*/
void lle_MCU_FullStop_Mode(void)
{ 
    CLKSEL_PLLSEL = 0;      // System Clock = OSCCLK
	PLLCTL_PLLON  = 0;      // PLL is turned OFF
	PLLCTL_CME    = 0;      // Clock monitor is disabled
    
    SCI2CR2_RIE = 0;    /* Disable the SCI2 Rx interrupt */        
    
    CLKSEL_PSTP = 0;    /* Oscillator disabled in stop mode */           
    STOP();             /* execute stop macro */  
}   


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