请问大侠我这个程序哪里出了问题呢？怎么产生不了上面的那个波形呢！下载到板上都没反应！该如何修改呢？跪求解答！万分感谢！arm2440！
#define GLOBAL_CLK 1
#define _ISR_STARTADDRESS 0x33ffff00
#define U32 unsigned int
#define pISR_TIMER4 (*(unsigned *)(_ISR_STARTADDRESS+0x58))
#define rSRCPND (*(volatile unsigned *)0x4a000000)
#define rINTMSK (*(volatile unsigned *)0x4a000008)
#define rINTPND (*(volatile unsigned *)0x4a000010)
#define rGPBCON (*(volatile unsigned *)0x56000010) //Port B control
#define rGPBDAT (*(volatile unsigned *)0x56000014) //Port B data
#define rGPBUP (*(volatile unsigned *)0x56000018) //Pull-up control B
#define rTCFG0 (*(volatile unsigned *)0x51000000) //Timer 0 configuration
#define rTCFG1 (*(volatile unsigned *)0x51000004) //Timer 1 configuration
#define rTCON (*(volatile unsigned *)0x51000008) //Timer control
#define rTCNTB4 (*(volatile unsigned *)0x5100003c) //Timer count buffer 4
#include "def.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"
void __irq Timer4_ISR(void)
{
static int count;
count ++;
rSRCPND = rSRCPND | (0x1<<14);
rINTPND = rINTPND | (0x1<<14);
switch(count)
{
case 1: rGPBDAT= 0x020;break;
case 10: rGPBDAT= 0x060;break;
case 25: rGPBDAT= 0x020;break;
case 71: rGPBDAT= 0x060;break;
case 138: rGPBDAT= 0x020;break;//GPB5，GPB6为信号输出
case 183: rGPBDAT= 0x000;count=0;break;
default:break;
}
}
int Main(void)
{
rCLKDIVN=0x00; //1:1:1 其中FCKL=400MHZ
rGPBCON = 0x155555; //B0输出，给蜂鸣器；B5~B8输出，给LED 用于可感实验,不用管它,不会影响程序
rGPBUP = 0x7ff;
rGPBDAT = 0x1e0; //蜂鸣器不响，LED灭 用于可感实验,不用管它,不会影响程序
rSRCPND = rSRCPND | (0x1<<14);
rINTPND = rINTPND | (0x1<<14);
rINTMSK = ~(0x1<<14); //打开定时器4中断
rTCFG0 &= 0xFF00FF;
rTCFG0 |= 0x300; // prescaler等于3
rTCFG1 &= ~0xF0000;
rTCFG1 |= 0x00; //divider等于2，则设置定时器4的时钟频率为//50MHz
rTCNTB4 =1; //让定时器4每隔0.02us中断一次
rTCON &= ~0xF00000;
rTCON |= 0x700000;
rTCON &= ~0x200000 ; //定时器4开始工作
pISR_TIMER4 = (U32)Timer4_ISR;//中断后把程序送到定时器4的中断端口执行
while(1);//等待中断
return 0;
}
