target.c

本文件为新一代基于ARM7构造的微处理器资料

/****************************************Copyright (c)****************************************************
**                               Guangzhou ZHIYUAN electronics Co.,LTD.
**                                     
**                                 http://www.embedtools.com
**
**--------------File Info---------------------------------------------------------------------------------
** File Name:               Target.c
** Last modified Date:      2007.12.12
** Last Version:            v1.0
** Description:             Initialization of the target board 目标板初始化
** 
**--------------------------------------------------------------------------------------------------------
** Created By:              Steven Zhou 周绍刚
** Created date:            2007.12.12
** Version:                 v1.0
** Descriptions:            The original version 初始版本
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             Renhaibo 
** Modified date:           2008.7.16  
** Version:                 v1.1
** Description:             The second version 第二版       
**                        
*********************************************************************************************************/

#include <includes.h>

/*********************************************************************************************************
** Function name:       tickInit
** Descriptions:	Initialize uC/OS-II's tick source(system timer)，
                        初始化uC/OS-II的时钟源（系统定时器）
** Input parameters:	None 无
** Output parameters:	None 无
** Returned value:	None 无        
** Created by:		Steven Zhou 周绍刚
** Created Date:	2007.12.12
**--------------------------------------------------------------------------------------------------------
** Modified by:             
** Modified date:           
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
static  void  tickInit (void)
{
    SysTickPeriodSet((INT32U)(SysCtlClockGet() / OS_TICKS_PER_SEC) -1 );
    SysTickEnable();
    SysTickIntEnable();
}


/*********************************************************************************************************
** Function name:       tickISRHandler
** Descriptions:	Timeout interrupt handler of system timer 系统定时器超时中断
** Input parameters:	None 无
** Output parameters:	None 无
** Returned value:	None 无        
** Created by:		Steven Zhou 周绍刚
** Created Date:	2007.12.12
**--------------------------------------------------------------------------------------------------------
** Modified by:            
** Modified date:          
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void  tickISRHandler (void)
{
    #if OS_CRITICAL_METHOD == 3
        OS_CPU_SR cpu_sr;
    #endif 

    OS_ENTER_CRITICAL();                         
    OSIntNesting++;
    OS_EXIT_CRITICAL();

    OSTimeTick();                                                       /*  Call uC/OS-II's OSTimeTick()*/

    OSIntExit();                                 
}


/*********************************************************************************************************
** Function name:       targetInit
** Descriptions:        Initialize the target board 初始化目标板
** Input parameters:    None 无
** Output parameters:   None 无
** Returned value:      None 无        
** Created by:	       任海波
** Created Date:       2008.7.16
**--------------------------------------------------------------------------------------------------------
** Modified by:             
** Modified date:           
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void  targetInit (void)
{
    #if PLL_EN == 0                                                     /*  Not use PLL  不使用PLL      */ 
        SysCtlClockSet(CCLK_DIV | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | EXT_CLK); 
                                                                        /*  System clock=               */
                                                                        /*  EXT_CLK/CCLK_DIV            */
                                                                        /*  系统时钟=EXT_CLK/CCLK_DIV   */ 

    #else                                                               /*  Use PLL  使用PLL            */  
        SysCtlClockSet(CCLK_DIV | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | EXT_CLK); 
                                                                        /*  System clock=200MHz/CCLK_DIV*/
                                                                        /*  系统时钟=200MHz/CCLK_DIV    */ 
    #endif
  
    tickInit();                                                         /*  Initialize the uC/OS-II tick*/ 
                                                                        /*  interrupt,using the Kernal's*/
                                                                        /*  timer                       */    
    /*
     *  Add you initialization code here.
     *  在这里加入你的初始化代码。
     */
    LED_Init(LED1 | LED2);                                      //  初始化LED1和LED2
    LED_On(LED1);                                               //  点亮LED1
    LED_Off(LED2);                                              //  熄灭LED2
}


/*********************************************************************************************************
  END FILE 
*********************************************************************************************************/