target.c

电力抄表系统的一个DEMO,最近接触这个系统,需要通过GPRS模块进行数据传送,用到SIM300c

#define IN_TARGET
#include "config.h"



void IRQ_Exception(void)
{
    while(1);                   // 这一句替换为自己的代码
}


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);

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

    VICVectAddr14 = (uint32)UART0_Handler;
    VICVectCntl14 = (0x20 | 0x06);
    VICIntEnable = 1 << 6;

    VICVectAddr15 = (uint32)Timer0_Handler;
    VICVectCntl15 = (0x20 | 0x04);
    VICIntEnable = 1 << 4;
 }


void TargetInit(void)
{
    OS_ENTER_CRITICAL();
    VICInit();
    Timer0Init();
    UART0Init(115200);
    OS_EXIT_CRITICAL();
}


void TargetResetInit(void)
{
    MEMMAP = 0x1;                   //remap

/* 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 = 2;
#if Fcclk < 20000000
    MAMTIM = 1;
#else
#if Fcclk < 40000000
    MAMTIM = 2;
#else
    MAMTIM = 3;
#endif
#endif

/* 设置实时时钟 */
    CCR = 1;
    PREINT = Fpclk / 32768 - 1;
    PREFRAC = Fpclk - (Fpclk / 32768) * 32768;
    YEAR = 2003;
    MONTH = 6;
    DOM = 2;
    

    VICIntEnClr = 0xffffffff;
    VICVectAddr = 0;
    VICIntSelect = 0;
    T0IR = 0xffffffff;
    T0TCR = 0X02;
}