基于ARM嵌入式系统接口技术课程设计报告.doc

基于arm嵌入式系统接口技术课程设计报告 课程设计题目：实时时钟设计 学院：计算机科学与技术学院 班级：计算机09-1班 学号： 姓名： 指导老师：微型计算机系统与接口技术课程设计设计时间：2011年12月19日 至 2011年12月23日设计环境1硬件环境：计算机，ev44b0ii实验台2软件环境：jediview 集成开发环境一、基本功能：利用s3c44box的rtc和实验箱上的lcd液晶、4*4小键盘设计一个实时时钟。1在lcd上显示当前日期及时间。可按如下格式显示：日期：xxxx年xx月xx日时间：xx：xx：xx 班级，姓名 里程： x x x x km2利用4*4小键盘校时 校时时lcd的相应位置要有光标提示。二、定时报警功能 通过小键盘设定报警时刻，报警时刻到，则在lcd上显示（各自不同的）报警图像。三、步骤： 1.掌握预备知识：a.液晶显示b.键盘译码c掌握s3c44bo芯片 rtc的使用方法 2.设计：a.实现rtc实时时钟功能b.显示实时时钟界面c.实现校时功能d.上机调试，运行，验收e.实现定时报警功能四、硬件接口逻辑图电路连接图五、程序代码（1）44binits/* * * name : 44binit.s* * version : 10.jan.2003* * description:* *c start up codes* *configure memory, initialize isr ,stacks* *initialize c-variables* *fill zeros into zero-initialized c-variables* */ /#include arm.h.globl _start_start: b resethandler /for debug b handlerundef /handlerundef b handlerswi /swi interrupt handler b handlerpabort /handlerpabort b handlerdabort /handlerdabort b . /handlerreserved b isrirq b handlerfiq/*important note*/if the h/w vectored interrutp mode is enabled, the above two instructions should/be changed like below, to work-around with h/w bug of s3c44b0x interrupt controller. ldr pc,=handlereint0 /mga h/w interrupt vector table ldr pc,=handlereint1 / ldr pc,=handlereint2 / ldr pc,=handlereint3 / ldr pc,=handlereint4567 / ldr pc,=handlertick /mga b . b . ldr pc,=handlerzdma0 /mgb ldr pc,=handlerzdma1 / ldr pc,=handlerbdma0 / ldr pc,=handlerbdma1 / ldr pc,=handlerwdt / ldr pc,=handleruerr01 /mgb b . b . ldr pc,=handlertimer0 /mgc ldr pc,=handlertimer1 / ldr pc,=handlertimer2 / ldr pc,=handlertimer3 / ldr pc,=handlertimer4 / ldr pc,=handlertimer5 /mgc b . b . ldr pc,=handlerurxd0 /mgd ldr pc,=handlerurxd1 / ldr pc,=handleriic / ldr pc,=handlersio / ldr pc,=handlerutxd0 / ldr pc,=handlerutxd1 /mgd b . b . ldr pc,=handlerrtc /mgka b . / b . / b . / b . / b . /mgka b . b . ldr pc,=handleradc /mgkb b . / b . / b . / b . / b . /mgkb b . b ./*0xe0=enterpwdn*/ ldr pc,=enterpwdnhandlerfiq:.word handlefiqhandlerirq:.word handleirqhandlerundef:.word handleundefhandlerswi:.word handleswihandlerdabort:.word handledaborthandlerpabort:.word handlepaborthandleradc:.word handleadchandlerrtc:.word handlertchandlerutxd1:.word handleutxd1handlerutxd0:.word handleutxd0handlersio:.word handlesiohandleriic:.word handleiichandlerurxd1:.word handleurxd1handlerurxd0:.word handleurxd0handlertimer5:.word handletimer5handlertimer4:.word handletimer4handlertimer3:.word handletimer3handlertimer2:.word handletimer2handlertimer1:.word handletimer1handlertimer0:.word handletimer0handleruerr01:.word handleuerr01handlerwdt:.word handlewdthandlerbdma1:.word handlebdma1handlerbdma0:.word handlebdma0handlerzdma1:.word handlezdma1handlerzdma0:.word handlezdma0handlertick:.word handletickhandlereint4567:.word handleeint4567handlereint3:.word handleeint3handlereint2:.word handleeint2handlereint1:.word handleeint1handlereint0:.word handleeint0/*one of the following two routines can be used for non-vectored interrupt.*/isrirq:/using i_ispr register.stmdb r13!,r0-r8,r12,r14bl irqldmia r13!,r0-r8,r12,r14subs pc,r14,#0x4irq: sub sp,sp,#4 /reserved for pc stmfd sp!,r8-r9 ldr r9,i_ispr ldr r9,r9 mov r8,#0x0f0: movs r9,r9,lsr #1 bcs f1 add r8,r8,#4 b f0f1: ldr r9,handleadc add r9,r9,r8 ldr r9,r9 str r9,sp,#8 ldmfd sp!,r8-r9,pc/* *start * */resethandler: ldr r0,wtcon /watch dog disable ldr r1,=0x0 str r1,r0 ldr r0,intmsk ldr r1,maskall /all interrupt disable str r1,r0/* * *set clock control registers* */ ldrr0,locktime ldrr1,=800 / count = t_lock * fin (t_lock=200us, fin=4mhz) = 800 strr1,r0ldrr0,pllcon/temporary setting of pllldrr1,pllcon_dat /fin=10mhz,fout=40mhzstrr1,r0 ldr r0,clkcon ldr r1,=0x7ff8 /all unit block clk enable str r1,r0/* * *set memory control registers* */ adr r0,smrdata ldmia r0,r1-r13 ldr r0,=0x01c80000 /bwscon address stmia r0,r1-r13/* * *initialize stacks* */ ldr sp, svcstack/why? bl initstacks/* * *setup irq handler* */ ldr r0,handleirq/this routine is needed ldr r1,isrirq/if there isnt subs pc,lr,#4 at 0x18, 0x1c str r1,r0 blmain /dont use main() because . b./*the function for initializing stack */*/initstacks:/dont use dram,such as stmfd,ldmfd./svcstack is initialized before/under toolkit ver 2.50, msr cpsr,r1 can be used instead of msr cpsr_cxsf,r1 mrs r0,cpsr bic r0,r0,#0x1f orr r1,r0,#0xdb/undefmode|noint msr cpsr,r1/undefmode ldr sp,undefstack orr r1,r0,#0xd7/abortmode|noint msr cpsr,r1 /abortmode ldr sp,abortstack orr r1,r0,#0xd2/irqmode|noint msr cpsr,r1 /irqmode ldr sp,irqstack orr r1,r0,#0xd1/fiqmode|noint msr cpsr,r1 /fiqmode ldr sp,fiqstack bic r0,r0,#0xdf/modemask|noint orr r1,r0,#0x13 msr cpsr,r1 /svcmode ldr sp,svcstack/user mode is not initialized. mov pc,lr /the lr register may be not valid for the mode changes./* *the function for entering power down mode * */*void enterpwdn(int clkcon)*/enterpwdn: mov r2,r0 /r0=clkcon ldr r0,refresh ldr r3,r0 mov r1, r3 orr r1, r1, #0x400000 /self-refresh enable str r1, r0 nop /wait until self-refresh is issued. may not be needed. nop /if the other bus master holds the bus, . nop / mov r0, r0 nop nop nop nop/*enter powerdn mode*/ ldr r0,clkcon str r2,r0/*wait until enter sl_idle,stop mode and until wake-up*/ mov r0,#0xff b0: subs r0,r0,#1 bneb0/*exit from dram/sdram self refresh mode.*/ ldr r0,refresh str r3,r0 mov pc,lrsmrdata:/* * memory configuration has to be optimized for best performance * * the following parameter is not optimized. * */* memory access cycle parameter strategy */ 1) even fp-dram, edo setting has more late fetch point by half-clock/ 2) the memory settings,here, are made the safe parameters even at 66mhz./ 3) fp-dram parameters:trcd=3 for trac, tcas=2 for pad delay, tcp=2 for bus load./ 4) dram refresh rate is for 40mhz. */ .long 0x11110090/bank0=om1:0, bank1bank7=16bit, bank2=8bit/ .long 0x600/gcs0.long 0x7bc0/gcs1 .long 0x7fc0/gcs2.long 0x7ffc/gcs3.long 0x7ffc/gcs4.long 0x7ffc/gcs5.long 0x18000/gcs6.long 0x18000/gcs7.long 0x820591/refresh rfen=1, trefmd=0, trp=3clk, trc=5clk, tchr=3clk,count=1019.long 0x16/sclk power mode, banksize 32m/32m.long 0x20/mrsr6 cl=2clk.long 0x20/mrsr7userstack:.word0xc7ffa00svcstack:.word0xc7ffb00undefstack:.word0xc7ffc00abortstack:.word0xc7ffd00irqstack:.word0xc7ffe00fiqstack:.word0xc7fff00handlereset:.word0xc7fff00handleundef:.word0xc7fff04handleswi:.word0xc7fff08handlepabort:.word0xc7fff0chandledabort:.word0xc7fff10handlereserved:.word0xc7fff14handleirq:.word0xc7fff18handlefiq:.word0xc7fff1c/dont use the label intvectortable,/because armasm.exe cannt recognize this label correctly./the value is different with an address you think it may be./intvectortablehandleadc:.word0xc7fff20handlertc:.word0xc7fff24handleutxd1:.word0xc7fff28handleutxd0:.word0xc7fff2chandlesio:.word0xc7fff30handleiic:.word0xc7fff34handleurxd1:.word0xc7fff38handleurxd0:.word0xc7fff3chandletimer5:.word0xc7fff40handletimer4:.word0xc7fff44handletimer3:.word0xc7fff48handletimer2:.word0xc7fff4chandletimer1:.word0xc7fff50handletimer0:.word0xc7fff54handleuerr01:.word0xc7fff58handlewdt:.word0xc7fff5chandlebdma1:.word0xc7fff60handlebdma0:.word0xc7fff64handlezdma1:.word0xc7fff68handlezdma0:.word0xc7fff6chandletick:.word0xc7fff70handleeint4567:.word0xc7fff74handleeint3:.word0xc7fff78handleeint2:.word0xc7fff7chandleeint1:.word0xc7fff80handleeint0:.word0xc7fff84/* some parameters for the board */*interrupt control*/intpnd:.long 0x01e00004intmod:.long 0x01e00008intmsk:.long 0x01e0000ci_ispr:.long 0x01e00020i_cmst:.long 0x01e0001c/*;watchdog timer*/wtcon:.long 0x01d30000/*;clock controller*/pllcon:.long 0x01d80000clkcon:.long 0x01d80004locktime:.long 0x01d8000c/*;memory controller*/refresh:.long 0x01c80024/*;pre-defined constants*/usermode:.long 0x10fiqmode:.long 0x11irqmode:.long 0x12svcmode:.long 0x13abortmode:.long 0x17undefmode:.long 0x1bmodemask:.long 0x1fnoint:.long 0xc0_isr_startaddress:.long 0xc7fff00 /gcs6:64m dram/sdrampllclk:.long40000000pllcon_dat: .long (2 0) + (3 4) +( 0x48 12)maskall:.long 0x07ffffff（2）44blcd.c#include #include #include .incoption.h#include .incdef.h#include .inc44b.h#include .inc44blib.h/#include .inclcd.h#include .inclcdlib.h#include .inc44blcd.h#include .incclock.h#include .incplm.hvoid clrscreen(void);void lcd_monoinit(void);extern int hour,min,sec,year,month,day,ye;#define framebuffer1 0xc400000void lcdinit(void) lcd_monoinit(); clrscreen(); /displaylcd(); display(10,4,3); display(10,4,6); void lcd_monoinit(void) /160x240 1bit/1pixel lcd #define mval_used 0rlcdcon1=(0)|(15)|(mval_used7)|(0x38)|(0x310)|(clkval_mono12); / disable,4b_sngl_scan,wdly=8clk,wlh=8clk,rlcdcon2=(lineval)|(hozval10)|(1021); /lineblank=10 (without any calculation) rlcdsaddr1= (0x022)1); / monochrome, lcdbank, lcdbaseurlcdsaddr2= m5d( (u32)framebuffer1+(scr_xsize*lcd_ysize/8)1) ) | (mval21)|(129);rlcdsaddr3= (lcd_xsize/16) | ( (scr_xsize-lcd_xsize)/16)9 );rlcdcon1=(1)|(15)|(mval_used7)|(0x38)|(0x310)|(clkval_mono12); / enable,4b_sngl_scan,wdly=8clk,wlh=8clk,void clrscreen(void) int i,j;unsigned int *pbuffer;pbuffer =(u32*) framebuffer1; for (i=0;i4,3,1); display(ye&0xf,3,2); display(year4,3,3); display(year&0xf,3,4); display(month4,3,6); display(month&0xf,3,7); display(day4,3,9); display(day&0xf,3,10); display(hour4,4,1); display(hour&0xf,4,2); display(min4,4,4); display(min&0xf,4,5); display(sec4,4,7); display(sec&0xf,4,8); void display(unsigned int code,unsigned char line,unsigned char xdot) unsigned short *pbuffer; unsigned char i; pbuffer =(u16*) framebuffer1; for (i=0;i16;i+) pbuffer20*i+320*line+xdot=(rtclockcode.datai*2)+(rtclockcode.datai*2+18);void displaylcd(void) unsigned int *pbuffer,temp_data; int i; unsigned char *buf; buf= (unsigned char *)plm; pbuffer =(u32*) framebuffer1; for(i = 0; i (4800/4) ;i+) temp_data = (bufi*4+3 24) + (bufi*4+2 16) + (bufi*4+1 8) +(bufi*4); pbufferi = temp_data;delay(10); / +void disstrhzk(char * hzku, int x1, int y1 ,unsigned char color,int charcount) int i;int j;unsigned char hz; int xx,yy;char * hzk;unsigned char flag = 128;for(hzk=hzku,xx=x1,yy=y1;(hzk-hzku)charcount;hzk+=32)for(i=0;i16;i+)hz=hzk2*i;for(j=0;jj) putpixelcolor(xx+j,yy+i,color);hz=hzk2*i+1;for(j=0;jj) putpixelcolor(xx+8+j,yy+i,color);xx+=16;if(xx=(scr_xsize-16)xx=x1;yy+=16;（3）44blib.c/* * name : 44blib.c* */#include .inc44b.h#include .inc44blib.h#include .incdef.h#include .incoption.h#include #include #include #include #include /* system */static int delayloopcount=400;void delay(int time)/ time=0: adjust the delay function by watchdog timer./ time0: the number of loop time/ 100us resolution. int i,adjust=0; if(time=0) time=200;adjust=1;delayloopcount=400;rwtcon=(mclk/1000000-1)8)|(23); / 1m/64,watch-dog,nreset,interrupt disablerwtdat=0xffff;rwtcnt=0xffff; rwtcon=(mclk/1000000-1)8)|(23)|(10;time-)for(i=0;idelayloopcount;i+); if(adjust=1) rwtcon=(mclk/1000000-1)8)|(23);i=0xffff-rwtcnt; / 1count/16us?delayloopcount=8000000/(i*64);/400*100/(i*64/200) /* ports */void port_init(void) /caution:follow the configuration order for setting the ports. / 1) setting value / 2) setting control register / 3) configure pull-up resistor. /port a group /gpa9 addr23 addr22 addr21 addr20 addr19 addr18 addr17 addr16 addr0 / 0, 1, 1, 1, 1, 1, 1, 1, 1, 1 rpcona=0x1ff; rpdata=0x0; /port b group /gpb10 gpb9 ngcs3 ngcs2 ngcs1 gpb5 gpb4 nsras nscas sclk scke / 0, 0, 1,1, 1, 0, 0,1, 1, 1, 1 rpconb=0x1cf; /port c group /iislrck iisd0 iisdi iisclk vd7 vd6 vd5 vd4 nxdack1 nxdreq1 gpc10 gpc11 txd1 rxd1 gpc14 gpc15 /all input / 11 11 11 11 11 11 11 11 11 11 0101 11 11 01 01 rpdatc=0x8400; rpconc=0x5f5fffff; rpupc=0x33ff;/should be enabled /port d group /vframe vm vline vclk vd3 vd2 vd1 vd0 / 10,10, 10,10, 10,10, 10,10 rpcond=0xaaaa; rpupd=0xff; /port e group /pe0:fout, pe1:txd0, pe2:rxd0, gpe3, gpe4, gpe5,gpe6,gpe7, codeclk / 10 10, 10, 01 , 01, 01, 01, 01, 10 rpcone=0x2552b; rpupe=0x0; rpdate=0x60; /port f group /iicscl iicsda nwait nxback0 nxdreq0 gpf5 gpf6 gpf7 gpf8 / 10 10 10 10 10 0 0 0 0 rpconf=0x2a; rpupf=0x0; /port g group /eint0 eint1 eint2 eint3 gpg4 gpg5 gpg6 gpg7 / 0x0 / 11 11 11 11 01 01 01 01 rpdatg=0x0; rpcong=0x55ff; rpupg=0x0; rspucr=0x7; /pull-up disable rextint=0x22222022; /all eint7:0 will be fal