lle_time.h

BCM 控制demo源代码

/*******************************************************************************/
/**
Copyright (c) 2007 Freescale Semiconductor
Freescale Confidential Proprietary
\file       lle_TIME.h
\brief      Definitions and function prototypes for timers
\author     Freescale Semiconductor
\author     B05114
\version    1.1
\date       December/2007
*/
/*******************************************************************************/

#ifndef _LLE_TIME_H
#define _LLE_TIME_H

/* Constants for PLL and bus clock configuration                */
/* If POSTDIV = 0: fbus = [OSCCLK*(SYNDIV+1)]/[(REFDIV+1)]      */
/* Else: fbus = [OSCCLK*(SYNDIV+1)]/[2*(REFDIV+1)*(POSTDIV)]    */
#define  PLL_POSTDIV  0x00
#define  PLL_SYNDIV   0x04
#define  PLL_REFDIV   0x00
/* fbus = [8MHz*(5)]/[(1)] = 40MHz */ 
    
/* fVCO = 2*OSCCLK*(SYNDIV+1)/(REFDIV+1) = 16MHz* 5/1 = 80MHz   */                                               
#define  PLL_VCOFRQ   0x01  /*  -> VCOFRQ = 01b */ 

/* fREF = OSCCLK/(REFDIV+1) = 8MHz/1 = 8MHz */
#define  PLL_REFFRQ   0x02  /* -> REFRQ = 10b */


/* Constants for RTI configuration, decimal divider and OSCCLK = 8 MHz */
#define  RTI_50ms     0x57  /* RTI period=400k/8MHz = 50ms */      
#define  RTI_150ms    0x6B  /* RTI period=1.2M/8MHz = 150ms */  


/* Constant for API configuration: period = 2*(APIR+1)*0.1ms */
#define  API_50ms     249  /* APIR = 249, period = 50ms) */
#define  API_100ms    499  /* APIR = 499, period = 100ms) */


/* Constants for delays */
#define  DELAY_100uS   308     /* ~100us, fBUS = 40MHz */ 
#define  DELAY_4mS     12320   /* ~4ms, fBUS = 40MHz */ 
#define  DELAY_10mS    30800   /* ~10ms, fBUS = 40MHz */ 
#define  SPI_DELAY     10      /* ~3us, fBUS = 40MHz */

/** Macros */
#define  lle_Delay100us()  lle_SW_Delay(DELAY_100uS)
#define  lle_Delay4ms()    lle_SW_Delay(DELAY_4mS)
#define  lle_Delay10ms()   lle_SW_Delay(DELAY_10mS)


/** Function Prototypes */

/** System clock and PLL initialization */
void lle_Init_XOSC(void);

/** Real time interupt initialization at 50 ms */
void lle_Init_RTI(UINT8 u8RTI_period);

/** Autonomous periodical interrupt initialization */
void lle_Init_API(UINT16 u16API_period);

/** Software loop for time delay */		
void lle_SW_Delay(UINT16 u16Delay);


#endif /* _LLE_TIME_H */

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