target.c

基于ARM7下的2100系列得uc-osII的工程模板！

/****************************************Copyright (c)****************************************************
**                         Guangzhou ZHIYUAN electronics Co.,LTD.                               
**                                     
**                               http://www.embedtools.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name:           target.c
** Last modified Date:  2004-09-17
** Last Version:        1.0
** Descriptions:        header file of the specific codes for LPC2200 target boards
**                      Every project should include a copy of this file, user may modify it as needed
**--------------------------------------------------------------------------------------------------------
** Created by:          Chenmingji
** Created date:        2004-02-02
** Version:             1.0
** Descriptions:        The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:         Chenmingji
** Modified date:       2004-09-17
** Version:             1.01
** Descriptions:        Renewed the template, added more compiler supports
**
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Descriptions:
**
*********************************************************************************************************/

#define IN_TARGET
#include "config.h"

/*********************************************************************************************************
** Function name:           Timer0_Exception
**
** Descriptions:            Timer0 interrupt service function
**
** input parameters:        None
** output parameters:       None
** Returned value:          None
**
** Created by:              Chenmingji
** Created Date:            2004/02/02
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void Timer0_Exception (void)
{
    T0IR = 0x01;
    VICVectAddr = 0;                                                    /*  通知中断控制器中断结束      */
    OSTimeTick();
}

/*********************************************************************************************************
** Function name:           Timer0Init
**
** Descriptions:            Initialize the Time0
**
** input parameters:        None
** output parameters:       None
** Returned value:          None
**
** Created by:              Chenmingji
** Created Date:            2004/02/02
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void Timer0Init (void)
{
    T0IR  = 0xffffffff;
    T0TCR = 0x03;
    T0TC  = 0;
    T0MCR = 0x03;
    T0MR0 = (Fpclk / OS_TICKS_PER_SEC);
    T0TCR = 0x01;
    vicIrqFuncSet(4, 0, (INT32U)Timer0_Exception);
 }
 
/*********************************************************************************************************
** Function name:           TargetInit
**
** Descriptions:            Initialize the target board; it is called in a necessary place, change it as
**                          needed
**
** input parameters:        None
** output parameters:       None
** Returned value:          None
**
** Created by:              Chenmingji
** Created Date:            2004/02/02
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void TargetInit (void)
{
    OS_ENTER_CRITICAL();
    srand((INT32U) TargetInit);
    Timer0Init();
    OS_EXIT_CRITICAL();
}

/*********************************************************************************************************
** Function name:           TargetResetInit
** Descriptions:            Initialize the target
** input parameters:        None
** output parameters:       None
** Returned value:          None
** Created by:              Chenmingji
** Created Date:            2004/02/02
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void TargetResetInit (void)
{

#ifdef __IN_CHIP    
    MEMMAP = 0x1;                   
#endif
#ifdef __IN_RAM    
    MEMMAP = 0x2;                   
#endif

 PLLCON = 1;
#if (Fpclk / (Fcclk / 4)) == 1
    VPBDIV = 0;
#endif
#if (Fpclk / (Fcclk / 4)) == 2
    VPBDIV = 2;
#endif
#if (Fpclk / (Fcclk / 4)) == 4
    VPBDIV = 1;
#endif

#if (Fcco / Fcclk) == 2
    PLLCFG = ((Fcclk / Fosc) - 1) | (0 << 5);
#endif
#if (Fcco / Fcclk) == 4
    PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5);
#endif
#if (Fcco / Fcclk) == 8
    PLLCFG = ((Fcclk / Fosc) - 1) | (2 << 5);
#endif
#if (Fcco / Fcclk) == 16
    PLLCFG = ((Fcclk / Fosc) - 1) | (3 << 5);
#endif
    PLLFEED = 0xaa;
    PLLFEED = 0x55;
    while((PLLSTAT & (1 << 10)) == 0);
    PLLCON  = 3;
    PLLFEED = 0xaa;
    PLLFEED = 0x55;

    MAMCR  = 0;                                                         /*  设置存储器加速模块          */
#if Fcclk  < 20000000
    MAMTIM = 1;
#else
#if Fcclk  < 40000000
    MAMTIM = 2;
#else
    MAMTIM = 3;
#endif
#endif
    MAMCR = 2;
}

/*********************************************************************************************************
  以下为一些与系统相关的库函数的实现
  具体作用请ads的参考编译器与库函数手册
  用户可以根据自己的要求修改
*********************************************************************************************************/
/*********************************************************************************************************
  The implementations for some library functions
  For more details, please refer to the ADS compiler handbook and The library
  function manual
  User could change it as needed
*********************************************************************************************************/
#pragma import(__use_no_semihosting_swi)
#pragma import(__use_two_region_memory)

void _ttywrch (int ch)
{
    ch = ch;
}

/*********************************************************************************************************
  End File
*********************************************************************************************************/