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RTC(Real Time Clock)單元能在系統(tǒng)斷電時(shí)通過系統(tǒng)備用電池供電，RTC能通過ARM的STRB/LDRB指令傳輸8位BCD數(shù)據(jù)到CPU，該數(shù)據(jù)包括時(shí)，分，秒，小時(shí)，天，月和年，RTC使用一個(gè)外部32.768KHZ的晶體也能執(zhí)行報(bào)警功能。 報(bào)警功能。在掉電模式或正常工作模式下，RTC能夠在指定的時(shí)間產(chǎn)生報(bào)警信號(hào)。在正常工作模式下，報(bào)警中斷（ALMINT）被激活。在掉電模式下，電源管理蘇醒信號(hào)PMWKUP也與ALMINT一樣處于激活狀態(tài)。RTC的報(bào)警寄存器（RTCALM）可以決定報(bào)警的使能或禁止和報(bào)警時(shí)間的設(shè)置條件。 節(jié)拍中斷。RTC節(jié)拍時(shí)間用于中斷請(qǐng)求。TICNT寄存器具有一個(gè)中斷使能位，同時(shí)其中的計(jì)數(shù)值用于中斷。當(dāng)計(jì)數(shù)值到達(dá)0時(shí)，節(jié)拍時(shí)間中斷就會(huì)觸發(fā)。中斷的時(shí)間間隔計(jì)算如下： 中斷的間隔時(shí)間 = (n+1)/128 單位是秒 其中n的值在1"127 下面的程序?qū)崿F(xiàn)了，按一個(gè)鍵，可以更新當(dāng)前時(shí)間，可以通過串口發(fā)送數(shù)據(jù)修改當(dāng)前時(shí)間，設(shè)定報(bào)警寄存器，報(bào)警被觸發(fā)后，會(huì)觸發(fā)時(shí)間節(jié)拍中斷，中斷時(shí)間間隔位1s，持續(xù)時(shí)間是20s，也就是間隔1s蜂鳴器響一下。按另一個(gè)鍵，停止節(jié)拍時(shí)間中斷，停止蜂鳴器。 #include "Font_Libs.h" #include "2440addr.h" #define _ISR_STARTADDRESS 0x33ffff00 #define pISR_EINT0 (*(unsigned *)(_ISR_STARTADDRESS+0x20)) #define pISR_TICK (*(unsigned *)(_ISR_STARTADDRESS+0x40)) #define pISR_RTC (*(unsigned *)(_ISR_STARTADDRESS+0x98)) #define pISR_EINT2 (*(unsigned *)(_ISR_STARTADDRESS+0x28)) #define pISR_UART0 (*(unsigned *)(_ISR_STARTADDRESS+0x90)) //垂直同步信號(hào)的脈寬、后肩和前肩 #define VSPW 15 #define VBPD 3 #define VFPD 5 //水平同步信號(hào)的脈寬、后肩和前肩 #define HSPW 8 #define HBPD 58 #define HFPD 15 #define CLKVAL 10 #define HOZVAL 319 #define LINEVAL 239 #define PWREN 1 #define MMODE 0 #define PNRMODE 3 #define BPPMODE 13 #define INVVCLK 0 #define INVVD 0 #define INVVDEN 0 #define U32 unsigned int #define M5D(n) ((n) & 0x1fffff) #define PAGEWIDTH 320 #define OFFSIZE 0 #define LCD_XSIZE 320 #define LCD_YSIZE 240 #define SCR_XSIZE 320 #define SCR_YSIZE 240 #define INVVLINE 1 #define INVVFRAME 1 #define BPP24BL 0 #define BSWP 0 #define HWSWP 0 volatile U32 LCD_BUFFER[240][320]; unsigned char data_buffer[7] = {5*16+1,1*16+7,1*16+9,2*16+6,7,1*16+2,1*16+0}; unsigned char alarm_buffer[6] ={0,1*16+8,0,0,0,0}; unsigned char *temp; unsigned char str0[] = "當(dāng)前時(shí)間為"; unsigned char str1[] = "年"; unsigned char str2[] = "月"; unsigned char str3[] = "日"; unsigned char str[][7] = {"星期日","星期一","星期二","星期三","星期四","星期五","星期六"}; U32 flag, count, t, i; void Init_LCD(){ rLCDCON1=(CLKVAL＜＜8)|(MMODE＜＜7)|(PNRMODE＜＜5)|(BPPMODE＜＜1)|0; //設(shè)置CLKVAL，VCLK=HCLK/[(CLKVAL+1)*2],決定VM的觸發(fā)方式，選擇顯示模式和BPP模式，暫時(shí)不要開啟LCD，因?yàn)檫�沒有設(shè)置好 rLCDCON2=(VBPD＜＜24)|(LINEVAL＜＜14)|(VFPD＜＜6)|(VSPW); //rLCDCON2，rLCDCON3和rLCDCON4主要設(shè)置時(shí)序 rLCDCON3=(HBPD＜＜19)|(HOZVAL＜＜8)|(HFPD); rLCDCON4=(HSPW); rLCDCON5 = (BPP24BL＜＜12) | (INVVCLK＜＜10) | (INVVLINE＜＜9) | (INVVFRAME＜＜8) | (0＜＜7) | (INVVDEN＜＜6) | (PWREN＜＜3) |(BSWP＜＜1) | (HWSWP); //INVVLINE和INVVFRAME需要進(jìn)行翻轉(zhuǎn)，因?yàn)镃PU發(fā)出的是正脈沖，LCD使用的是負(fù)脈沖，所以要改變極性，PWREN使能電源信號(hào) rLCDSADDR1=(((U32)LCD_BUFFER＞＞22)＜＜21)|M5D((U32)LCD_BUFFER＞＞1); rLCDSADDR2=M5D(((U32)LCD_BUFFER+(SCR_XSIZE*SCR_YSIZE*4))＞＞1 ); rLCDSADDR3=PAGEWIDTH*32/16; rLCDINTMSK|=(3); rTCONSEL = 0; rGPCUP = 0x0; rGPDCON = 0xaaaaaaaa; rGPCCON = 0xaaaa02a9; rGPDUP = 0x0; rGPGUP=rGPGUP&("(1＜＜4))|(1＜＜4); rGPGCON=rGPGCON&("(3＜＜8))|(3＜＜8); rLCDCON1 |= 1; //使能數(shù)據(jù)輸出和LCD控制信號(hào) } void Paint_background(U32 c, U32 startx, U32 starty, U32 endx, U32 endy){ U32 i,j; for(j = starty; j ＜ endy; j++) for(i = startx; i ＜ endx; i++) LCD_BUFFER[j][ i] = c; } void SetTime(){ rRTCCON |= 0x1; rBCDSEC = data_buffer[0]; rBCDMIN = data_buffer[1]; rBCDHOUR = data_buffer[2]; rBCDDATE = data_buffer[3]; rBCDDAY = data_buffer[4]; rBCDMON = data_buffer[5]; rBCDYEAR = data_buffer[6]; rRTCCON &= 0xfe; } void GetTime(){ rRTCCON |= 0x1; data_buffer[0] = rBCDSEC; data_buffer[1] = rBCDMIN; data_buffer[2] = rBCDHOUR; data_buffer[3] = rBCDDATE; data_buffer[4] = rBCDDAY; data_buffer[5] = rBCDMON; data_buffer[6] = rBCDYEAR; if(data_buffer[0] == 0){ data_buffer[0] = rBCDSEC; data_buffer[1] = rBCDMIN; data_buffer[2] = rBCDHOUR; data_buffer[3] = rBCDDATE; data_buffer[4] = rBCDDAY; data_buffer[5] = rBCDMON; data_buffer[6] = rBCDYEAR; } rRTCCON &= 0xfe; } void Paint_text(U32 x, U32 y, U32 color, unsigned char ch[]){ int i, j, test,t = 0; for(i = 0; i ＜ 16; i++){ test = 0x80; for(j = 0; j ＜ 16; j++){ if(j == 8){ test = 0x80; t++; } if(ch[t] & test) LCD_BUFFER[x+i][y+j] = color; test ＞＞= 1; } t++; } } void Paint_Ascii(U32 x, U32 y, U32 color, unsigned char ch[]){ int i, j, test; for(i = 0; i ＜ 16; i++){ test = 0x80; for(j = 0; j ＜ 8; j++){ if(test & ch[ i]) LCD_BUFFER[x+i][y+j] = color; test ＞＞= 1; } } } void __irq Uart_ISR(void){ char buf; rSUBSRCPND |= 0x3; rSRCPND |= 0x1＜＜28; rINTPND |= 0x1＜＜28; if(rUTRSTAT0&0x1){ buf = rURXH0; if((buf == 0xaa) && (t == 0)){ t = 1; i = 0; rUTXH0 = 0xaa; } else{ if(t){ data_buffer[ i] = buf; i++; rUTXH0 = 0xdd; if(i == 7){ rUTXH0 = 0xbb; SetTime(); i = 0; t = 0; flag = 1; } } else{ rUTXH0 = 0xcc; } } } } //2010年12月26日星期日19:17:51 void ShowTime(){ U32 qh, wh; unsigned char s0,s1; int i, t, k; char h, l; GetTime(); //當(dāng)前時(shí)間為 for(i = 0,t = 0, k = 0; i ＜ 5; i++){ s0 = str0[t]; s1 = str0[t+1]; qh = s0-0xa0; wh = s1-0xa0; temp = & __HZK[((qh-1)*94+wh-1)*32]; Paint_text(100,k,0x0,temp); t = t + 2; k += 16; } //: temp = &__ASCII[':'*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //20 temp = &__ASCII['2'*16]; Paint_Ascii(100,k,0x0,temp); k+=8; temp = &__ASCII['0'*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //10 h = (data_buffer[6]＞＞4)+48; temp = &__ASCII[h*16]; Paint_Ascii(100,k,0x0,temp); k+=8; l = (data_buffer[6]&0x0f)+48; temp = &__ASCII[l*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //年 qh = str1[0]-0xa0; wh = str1[1]-0xa0; temp = & __HZK[((qh-1)*94+wh-1)*32]; Paint_text(100,k,0x0,temp); k+=16; //12 h = (data_buffer[5]＞＞4)+48; temp = &__ASCII[h*16]; Paint_Ascii(100,k,0x0,temp); k+=8; l = (data_buffer[5]&0xf)+48; temp = &__ASCII[l*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //月 qh = str2[0]-0xa0; wh = str2[1]-0xa0; temp = & __HZK[((qh-1)*94+wh-1)*32]; Paint_text(100,k,0x0,temp); k+=16; //26 h = (data_buffer[3]＞＞4)+48; temp = &__ASCII[h*16]; Paint_Ascii(100,k,0x0,temp); k+=8; l = (data_buffer[3]&0xf)+48; temp = &__ASCII[l*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //日 qh = str3[0]-0xa0; wh = str3[1]-0xa0; temp = & __HZK[((qh-1)*94+wh-1)*32]; Paint_text(100,k,0x0,temp); k+=16; //星期日 for(i = 0,t = 0; i ＜ 3; i++){ s0 = str[0][t]; s1 = str[0][t+1]; qh = s0-0xa0; wh = s1-0xa0; temp = & __HZK[((qh-1)*94+wh-1)*32]; Paint_text(100,k,0x0,temp); t = t + 2; k += 16; } //19:17:51 //19 h = (data_buffer[2]＞＞4)+48; temp = &__ASCII[h*16]; Paint_Ascii(100,k,0x0,temp); k+=8; l = (data_buffer[2]&0xf)+48; temp = &__ASCII[l*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //: temp = &__ASCII[':'*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //17 h = (data_buffer[1]＞＞4)+48; temp = &__ASCII[h*16]; Paint_Ascii(100,k,0x0,temp); k+=8; l = (data_buffer[1]&0xf)+48; temp = &__ASCII[l*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //: temp = &__ASCII[':'*16]; Paint_Ascii(100,k,0x0,temp); k+=8; //51 h = (data_buffer[0]＞＞4)+48; temp = &__ASCII[h*16]; Paint_Ascii(100,k,0x0,temp); k+=8; l = (data_buffer[0]&0xf)+48; temp = &__ASCII[l*16]; Paint_Ascii(100,k,0x0,temp); k+=8; } void SetAlarm(){ rALMSEC = alarm_buffer[0]; rALMMIN = alarm_buffer[1]; rALMHOUR = alarm_buffer[2]; rALMDATE = alarm_buffer[3]; rALMMON = alarm_buffer[4]; rALMYEAR = alarm_buffer[5]; } void __irq EINT0_ISR(void){ rSRCPND |= 1; //SRCPND 通過寫入數(shù)據(jù)清零，如果不清零，會(huì)反復(fù)進(jìn)行請(qǐng)求 rINTPND |= 1; //INDPND 通過置1清零 flag = 1; } void __irq EINT2_ISR(void){ //使用__irq這個(gè)關(guān)鍵字定義終端服務(wù)例程，這樣系統(tǒng)會(huì)自動(dòng)為我們保留一些變量，并能在中斷處理完后正確的返回 rSRCPND |= 1＜＜2; rINTPND |= 1＜＜2; rTICNT &= "(1＜＜7); rGPBDAT = 0xfe; //如果按鍵被按下，關(guān)閉節(jié)拍時(shí)間中斷 } void __irq Alarm_ISR(void){ rSRCPND |= 1＜＜30; //SRCPND 通過寫入數(shù)據(jù)清零，如果不清零，會(huì)反復(fù)進(jìn)行請(qǐng)求 rINTPND |= 1＜＜30; //INDPND 通過置1清零 rTICNT = (1＜＜7)|(127＜＜0); //開啟節(jié)拍時(shí)間中斷，設(shè)置每1s中斷一次 } void __irq Tick_ISR(void){ rSRCPND |= 1＜＜8; //SRCPND 通過寫入數(shù)據(jù)清零，如果不清零，會(huì)反復(fù)進(jìn)行請(qǐng)求 rINTPND |= 1＜＜8; //INDPND 通過置1清零 if(count%2 == 0) rGPBDAT = 0x1; else rGPBDAT = 0xfe; count++; if(count == 20){ count = 0; rGPBDAT = 0; rTICNT &= "(1＜＜7); //中斷20次，然后停止節(jié)拍時(shí)間中斷 } } int Main(){ flag = 0; count = 0; t = 0; rGPFCON &= 0xffcc; //0 rGPFCON |= (1＜＜1)|(1＜＜5); rGPFUP = 0xfe; rGPBCON &= 0xfffc; rGPBCON |= 0x1; rGPBUP = 0xfe; rULCON0 = 0xfff00; rULCON0 |= 0x3; rUCON0 = 0x0800; rUCON0 |= 0x05; rUBRDIV0 = 26; rRTCALM = (1＜＜1)|(1＜＜6); //主要全局報(bào)警使能，然后是分鐘報(bào)警使能 rSUBSRCPND |= 0x3; rSRCPND |= (1＜＜0)|(1＜＜2)|(1＜＜8)|(1＜＜28)|(1＜＜30); //先清一下 rINTPND |= (1＜＜0)|(1＜＜2)|(1＜＜8)|(1＜＜28)|(1＜＜30); //先清一下 rINTMSK &= ("(0x1＜＜0))&("(0x1＜＜2))&("(0x1＜＜8))&("(0x1＜＜28))&("(0x1＜＜30)); //開中斷 rINTSUBMSK &= ("(0x1＜＜0)) & ("(0x1＜＜1)); pISR_EINT0 = (U32)EINT0_ISR; pISR_EINT2 = (U32)EINT2_ISR; pISR_TICK = (U32)Tick_ISR; pISR_RTC = (U32)Alarm_ISR; pISR_UART0 = (U32)Uart_ISR; Init_LCD(); Paint_background(0xffffff,0,0,320,240); SetAlarm(); SetTime(); ShowTime(); while(1){ if(flag){ Paint_background(0xffffff,0,0,320,240); ShowTime(); flag = 0; } } } 李萬鵬 |
