ku_ice5202008-06-01 19:24

兄台你好，我是嵌入式的爱好者，毕业设计选择了arm控制微型打印机的实验，现在硬件已经没有问题，只是在微型打印机的驱动程序上出现了若干问题，想得到兄台的帮助。在我把zImage,rootfs.cramfs烧写到2410后，按reset重新启动后，cd /usr/sbin,然后执行：./print 就出现了一系列问题 unable handle kernel paging request at virtual address 0xd2800600 下面是我的驱动程序的代码： #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "math.h" //微型打印机程序需要 #define INPUT (*(volatile unsigned char *)(0xd2800004)) #define OUTPUT (*(volatile unsigned char *)(0xd2800004)) #define CS244 (*(volatile unsigned char *)(0xd2800800)) #define CS273 (*(volatile unsigned char *)(0xd2800600)) #define MYGSM_MAJOR 254 static int gsm_Ioctl(struct inode *inode,struct file *file, unsigned int cmd, unsigned long arg); static int gsm_Close(struct inode * inode, struct file * file); static int gsm_Open(struct inode * inode, struct file * file); static int gsm_Read(struct file *fp, char *buf, size_t count); static int gsm_Write(struct file *fp, char *buf, size_t count); struct file_operations gsm_fops = { write: gsm_Write, open: gsm_Open, //打开设备文件 ioctl: gsm_Ioctl, //设备文件其他操作 release: gsm_Close, //关闭设备文件 read: gsm_Read, //读取设备文件 }; static void Timer3(short dat1,short dat2) { static char time3 = 0; if(!dat2) dat2 = dat1/2; if(dat1) //启动定时器3 { if(time3) return; INTMSK |= (0x1<<13); GPBCON = (GPBCON & ~(0x0c0)) | 0x80; //Dead zone=0,Prescaler1=15(0x0f), Prescaler0=15(0x0f) GPBUP &= 0x0; //disable poll-up function TCFG0 = (TCFG0 & ~(0xffffff)) | 0x00080f; TCFG1 = (TCFG1 & ~(0x00f000)) | 0x003000; TCNTB3 = dat1; TCMPB3 = dat2; //pwm TCON = (TCON & ~(0x0f0000)) | 0x0a0000; TCON = (TCON & ~(0x0f0000)) | 0x090000; INTMSK &= ~(0x1<<13); time3 = 1; } else //关闭定时器3 { if(!time3) return; INTMSK |= (0x1<<13); TCON &= ~0x10000; GPBDAT |=0x10; time3 = 0; } printk("\r\nGPBUP = %x\r\n",GPBUP); } static int gsm_Close(struct inode * inode, struct file * file) { printk("GSM Device Closed\n"); return 0; } static int gsm_Open(struct inode * inode, struct file * file) { printk("GSM Device opened\n"); return 0; } /*下面是微型打印机的程序,不要轻易改动,否则会烧毁微打头*/ void dellay(unsigned int t) { for(;t>0;t--); } void PrnPowerOff(void) //关闭微打的电源 { CS273 = 0xfe; } void PrnPowerOn(void) //打开微打的电源 { CS273 = 0xdf; } void PrnWait(void) //检测定时信号的变化，收到后开始下一针头的打印 { if((CS244&0x2)==0) while((CS244&0x2)==0); else while((CS244&0x2)!=0); } void PrnReset(void) //检测复位信号，收到后开始一行的打印 { while((CS244&0x01) != 0x00); while((CS244&0x01) == 0x00); } void PrnDot(unsigned char PrnNo,unsigned char data) { if(data!=0) CS273 = 0xdf&(~(0x1<<(PrnNo+1))); PrnWait(); CS273 = 0xdf; } void PrnTranLine(unsigned char *prndata) { unsigned char i,j; for(i=0;i<24;i++) //每个打印头一行打印24个点 { for(j=0;j<4;j++) //4个打印头轮流打点 { PrnDot(j,prndata[24*j+i]); } } } void PrnTran(unsigned char line,unsigned int *pdata) { //横向打印波形 unsigned char i,j; unsigned char predata[100]; //保存在本行中各个数据点的状态 unsigned char nosdata[100]={0}; unsigned char prndata[100]; PrnPowerOn(); dellay(50000); for(i=0;i((0xfff/line)*(line- (i+1))))) { predata[j] = 0x1; if(predata[j-1]==0x0) nosdata[j]=~nosdata[j]&0x1; else nosdata[j]=0; } else { predata[j] = 0; if(predata[j-1]==0x1) nosdata[j]=~nosdata[j]&0x1; } prndata[j]= predata[j]|nosdata[j]; } PrnReset(); //等待一行打印的开始信号 PrnTranLine(prndata); //打印一行 } dellay(50000); PrnPowerOff(); //关闭打印机电源 } void StartPrint(void) { unsigned int adbuff[128],i; PrnPowerOff(); for(i=0;i<128;i++) //产生方波 { if((i%32)<16) adbuff[i] =4080; else adbuff[i] =10; //adbuff[i] =(unsigned int)(2040*(sin(6.28*(i+8)/32)+1)); } PrnTran(40,adbuff); //PrnTran(4,Zero); //PrnTran(40,pz); //PrnTran(4,Zero); } /*微型打印机程序结束*/ static int gsm_Ioctl(struct inode *inode,struct file *file, unsigned int cmd, unsigned long arg) { if(cmd==0) Call_Out((char *)arg); //拨打电话 if(cmd==1) WriteCmdToGSM((char*)arg); //Write Command to GSM if(cmd==2) Message((char *)arg); //发送短信内容 if(cmd==3) Timer3((short)arg,0); //启动定时器3 if(cmd==4) Timer3(0,0); //关闭定时器3 if(cmd==5) Set1(); if(cmd==6) Set0(); if(cmd==7) return getad(); if(cmd==8) return RunDS1820(); if(cmd==9) return wirelesssend((char)(arg&0xf)); if(cmd==10) return (int)wirelessrece(); if(cmd==11) return GetHall(); if(cmd==12) return RunSonic(); if(cmd==13) RunModem(); if(cmd==14) ModemRec(readback); if(cmd==15) return gps(); if(cmd==16) ICCARDW((unsigned char) (arg>>16)&0xff,(unsigned char)arg&0xff); if(cmd==17) return (int)ICCARDR((unsigned char)(0xff&arg)); if(cmd==18) cmd7279(arg); if(cmd==19) return (int)read7279(); if(cmd==20) return icl7135(); if(cmd==21) return speed(); if(cmd==22) rs232((unsigned char)(0xff&arg)); if(cmd==23) pwm(); //Start Timer3 if(cmd==24) stepmotor(( int)(arg)); if(cmd==25) SetUart1(); if(cmd==26) SendUart1(arg); if(cmd==27) pwm_set((arg>>16) & 0xffff, arg&0xffff); //Generate PWM control signal if(cmd==28) Adc_Init(0); //Initial ADC on 2410chip if(cmd==29) return Adc_Sample(0); //Sample temperature in pid_temp if(cmd==30) iocontrol(); // if(cmd==31) Gsm_Cmd((char *)arg); //接听或挂断 if(cmd==32) WriteToRtl16c450((char *)arg); //直接向450写入数据,不等回应 if(cmd==33) ReadFromRrl16c450((char *)arg); //直接从450读出数据 if(cmd==34) StartPrint(); //驱动微型打印机开始打印 if(cmd==35) return WirelessRev(); //无线收发实验接收数据 return 0; } int __init gsm_Init(void) { int result; int i; printk("Registering GSM Device\n"); result = register_chrdev(MYGSM_MAJOR, "myGSM", &gsm_fops);//注册设备 BWSCON = (BWSCON & ~(BWSCON_ST4 | BWSCON_WS4 | BWSCON_DW4)) | (BWSCON_ST4 | BWSCON_WS4 | BWSCON_DW(4, BWSCON_DW_8)); BANKCON4= BANKCON_Tacs4 | BANKCON_Tcos4 | BANKCON_Tacc4 | BANKCON_Toch4 | BANKCON_Tcah4 | BANKCON_Tacp6 | BANKCON_PMC4; if (result<0) { printk(KERN_INFO"[FALLED: Cannot register gsm_driver!]\n"); return result; } set_gpio_ctrl(GPIO_F0|GPIO_MODE_EINT); //set EINT MODE set_external_irq(IRQ_EINT0,2,0); //set falling edge triger for(i=0;i<100;i++); if (request_irq(IRQ_EINT0,Exint0_ISR,0,"myGSM","external INT")) { printk(KERN_INFO"[FALLED: Cannot register myGSM_Interrupt!]\n"); return -EBUSY; } if (request_irq(13,timer3_ISR,0,"myGSM","timer3")) { printk(KERN_INFO"[FALLED: Cannot register myGSM timer3!]\n"); } printk("GSM Driver Installed.\n"); pt=0; return 0; } void __exit gsm_Exit(void) { unregister_chrdev(MYGSM_MAJOR, "myGSM"); printk("You have uninstall The myGSM Driver succesfully,\n if you want to install again,please use the insmod command \n"); } module_init(gsm_Init); module_exit(gsm_Exit); MODULE_LICENSE("GPL");