target.c

一个完整的串口转以太网服务器的源代码.硬件平台是LPC2214 ARM7处理器+8019AS以太网控制器.软件平台是UCOSII+一个第三方的TCP/IP协议栈.

#define IN_TARGET
#include "config.h"

   void IRQ_Exception(void)
{
    while(1);                  
}

      void FIQ_Exception(void)
{
    while(1);                 
}

  void Timer0_Exception(void)
{
    T0IR = 0x01;
    VICVectAddr = 0;            // 通知中断控制器中断结束
    OSTimeTick();
}

   void Timer0Init(void)
{
    T0IR = 0xffffffff;
    T0TC = 0;
    T0TCR = 0x01;
    T0MCR = 0x03;
    T0MR0 = (Fpclk / OS_TICKS_PER_SEC);
 }

      void VICInit(void)
{
    extern void IRQ_Handler(void);
    extern void Timer0_Handler(void);
    extern void UART0_Handler(void); //add by liuxj

    VICIntEnClr = 0xffffffff;
    VICDefVectAddr = (uint32)IRQ_Handler;

 //UART0向量中断初始化
    VICVectAddr14=(uint32)UART0_Handler;
    VICVectCntl14=(0x20)|0x06;
    VICIntEnable=1<<6;
    
    
    VICVectAddr0 = (uint32)Timer0_Handler;
    VICVectCntl0 = (0x20 | 0x04);
    VICIntEnable = 1 << 4;
 }

       void TargetInit(void)
{
    OS_ENTER_CRITICAL();
    srand((uint32) TargetInit);
    VICInit();
    Timer0Init();
    
     
    UART0Init(57600);
    
    OS_EXIT_CRITICAL();
}


        void InitialiseUART0(uint32 bps)
{  	
    uint16 Fdiv;
    
    PINSEL0 = (PINSEL0 & 0xfffffff0) | 0x05;    /* 选择管脚为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 */
                                                /* 且设置为8,1,n */
	U0IER = 0x00;                               /* 禁止中断 */
    U0FCR = 0x00;                               /* 初始化FIFO */
} 

        void TargetResetInit(void)
{
#ifdef __DEBUG    
    MEMMAP = 0x3;                   //remap
#endif

#ifdef __OUT_CHIP    
    MEMMAP = 0x3;                   //remap
#endif

#ifdef __IN_CHIP    
    MEMMAP = 0x1;                   //remap
#endif

    PINSEL0 = (PINSEL0 & 0xFFFF0000) | 0x05 | 0x50;

/* 设置系统各部分时钟 */
    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;

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

/* 设置串行口 */
    InitialiseUART0(57600);

/* 设置实时时钟 */
    CCR = 1;
    PREINT = Fpclk / 32768 - 1;
    PREFRAC = Fpclk - (Fpclk / 32768) * 32768;
    YEAR = 2006;
    MONTH = 3;
    DOM = 2;
    

    VICIntEnClr = 0xffffffff;
    VICVectAddr = 0;
    VICIntSelect = 0;
    T0IR = 0xffffffff;
    T0TCR = 0X02;
}
/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/