target.c

SmartARM2400系列开发板全套资料

/****************************************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:       sysDelayNS
* Descriptions:        长软件延时
* input parameters:    idly	延时参数，值越大，延时越久
* output parameters:   none
* Returned value:      none
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void  sysDelayNS(INT32U  uiDly)
{  
    INT32U  i;
    for(; uiDly > 0; uiDly--){
        for(i = 0; i < 5000; i++);
    }
}

/*********************************************************************************************************
** 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:			UART0Init
**
** Descriptions:			Initialize the UART0
**
** input parameters:		bps
** Returned value:			None
**         
** Used global variables:	None
** Calling modules:			None
**
** Created by:				Chenmingji
** Created Date:			2004/02/02
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void UART0Init (uint32 bps)
{
    uint16 Fdiv;
    
    PCONP |= 1<<3;                                     /*  在PCONP中启动UART*/
    PINSEL0 = (PINSEL0 & 0xffffff0f)|(1<<4)|(1<<6);    /* 选择管脚P0.2、P0.3为UART0 */

    U0LCR = 0x80;                               /* 允许访问分频因子寄存器 */
    Fdiv = (Fpclk / 16) / bps;                  /* 设置波特率 */
    U0DLM = Fdiv / 256;							
	U0DLL = Fdiv % 256;						
    U0LCR = 0x03;                               /* 禁止访问分频因子寄存器 */
                                                /* 同时设置UART工作模式为8位字符长度,1个停止位,无奇偶校验位 */
	U0IER = 0x00;                               /* 禁止中断 */
    U0FCR = 0x81;                               /* 使能FIFO，接收缓冲区的触发点为8个字节 */
} 

/*********************************************************************************************************
** Function name:			UART0_SendByte
**
** Descriptions:			Send the data
**
** input parameters:		data
** Returned value:			None
**         
** Used global variables:	None
** Calling modules:			None
**
** Created by:				Chenmingji
** Created Date:			2004/02/02
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void UART0_SendByte (uint8 data)
{
    U0THR = data;                                /*  发送数据*/
    while ((U0LSR & 0X40) == 0);                 /*  等待数据发送完毕*/
}

/*********************************************************************************************************
** Function name:			UART0_SendByte
**
** Descriptions:			Send the data
**
** input parameters:		data
** Returned value:			None
**         
** Used global variables:	None
** Calling modules:			None
**
** Created by:				Chenmingji
** Created Date:			2004/02/02
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void UART0_SendStr (char *str)
{
    while (1) {
        if (*str == '\0') {/*  遇到结束符,退出*/
            break;
        }
        UART0_SendByte(*str++);
    }
}

/*********************************************************************************************************
** 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();
    UART0Init(9600);                                                    /* UART0初始化                  */
    OS_EXIT_CRITICAL();
}

/*********************************************************************************************************
** Function name:     SDRAMInit
** Descriptions:      初始化SDRAM
** input parameters:  none
** output parameters: none
**
** Created by:		  zhangzheng
** Created Date:	  2007.12.10
**-------------------------------------------------------------------------------------------------------
** Modified by:		  zhanghuping		
** Modified date:	  2008.04.25		
**-------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void  SDRAMInit( void )
{  
    uint32 i, dummy ;
    /* 
    * 使能SDRAM总线连接 
    */
    PINSEL4    = 0x50000000;
    PINSEL5    = 0x05050555;
    PINSEL6   |= 0x55555555;
    PINSEL8   |= 0x55555555;
    PINSEL9   |= 0x50555555;
    EMCControl = 0x00000001;		                                    /* Disable Address mirror       */
 
    /* 
     * 设置SDRAM访问时序. 
     */
    EMCDynamictRP   = 1;        
    EMCDynamictRAS  = 3;		
    EMCDynamictSREX = 1;