集美大学 单片机考试复习资料 (基于飞思卡尔AW60)

集美大学机电专业单片机考试复习资料飞思卡尔A W60单片机复习1. 串口程序#include <hidef.h> /* for EnableInterrupts macro */#include "derivative.h" /* include peripheral declarations */void MCUInit(void){SOPT = 0b01100000; //$70 System Options Register(write once)ICGC2 = 0b00110000; //$30 internal clock generation 2ICGC1 = 0b01111000; //$78 internal clock generationwhile(!ICGS1_LOCK); //等待FLL稳定PTBDD=0xff ;PTBD=0xff ;}void SCIInit(){unsigned int ubgs,baud=9600;unsigned char sysclk=20;//1.计算波特率并设置:ubgs = fsys/(波特率*16)(其中fsys=sysclk*1000000)ubgs = sysclk*(10000/(baud/100))/16; //理解参考上一行，此处便于CPU运算SCI1BDH= (unsigned char)((ubgs & 0xFF00) >> 8);SCI1BDL= (unsigned char)(ubgs & 0x00FF);SCI1C1= 0; //无校验,正常模式(开始信号+ 8位数据(先发最低位) + 停止信号)SCI1C2= (0| SCI1C2_TE_MASK | SCI1C2_RE_MASK );//允许发送,允许接收,查询方式收发}void SCISend1(unsigned char ch){while(!(SCI1S1 & SCI1S1_TDRE_MASK));//判断发送缓冲区是否为空SCI1D = ch;}void SCISendN(unsigned char n, unsigned char ch[]){unsigned i;for (i = 0; i < n; i++)SCISend1(ch[i]);}unsigned char SCIRe1(unsigned char *p){unsigned int k;unsigned char i;for (k = 0; k < 0x0b; k++)//有时间限制if((SCI1S1 & SCI1S1_RDRF_MASK) != 0)//判断接收缓冲区是否满{i = SCI1D;*p = 0x00;break;}if (k >= 0x0b) //接收失败{i = 0xff;*p = 0x01;}return i;}unsigned char SCIReN(unsigned n,unsigned char ch[]){unsigned char m;unsigned char fp; //接收标志m = 0;while (m < n){ch[m] = SCIRe1(&fp);if (fp == 1){return 1; //接收失败}m++;}return 0; //接收成功}void main(void){unsigned char SerialBuff[]="Hello! World!"; //初始化存放接收数据的数组DisableInterrupts; //禁止总中断MCUInit();SCIInit();EnableInterrupts; //开放总中断SCISendN(13,SerialBuff); //串口发送"Hello World!"for(;;){if((SCI1S1&SCI1S1_RDRF_MASK)!=0){PTBD=SCI1D ;if((SCI1S1&SCI1S1_TDRE_MASK)!=0)SCI1D=PTBD;}elsePTBD=0x00;}}2.按键程序#include <hidef.h> /* for EnableInterrupts macro */#include "derivative.h" /* include peripheral declarations */ #define uchar unsigned char#define uint unsigned intunsigned char table[]="I love mcu!";unsigned char table1[]=" very much!";#define rsout PTCDD |= (1<<4)#define rsset PTCD |= (1<<4)#define rsclr PTCD &=~(1<<4)#define rwout PTCDD |= (1<<6)#define rwset PTCD |= (1<<6)#define rwclr PTCD &=~(1<<6)#define enout PTFDD |= (1<<6)#define enset PTFD |= (1<<6)#define enclr PTFD &=~(1<<6)void mcu_init(void){PTADD = 0XFF;rsout;rwout;enout;}void MCUInit(void){SOPT = 0b01110000;ICGC2 = 0b00110000;ICGC1 = 0b01111000;while(!ICGS1_LOCK);}void Delayms(uint MS){uint i,j;for( i=0;i<MS;i++)for(j=0;j<1141;j++);}void Delay(uint count){uint i,j;for(j=0; j<count; j++){for(i=0;i<1000; i++);}}void write_com(uchar com){rsclr;rwclr;enclr;PTAD=com;Delayms(5);enset;Delayms(5);enclr;}void write_data(uchar date){rsset;rwclr;PTAD=date;Delayms(5);enset;Delayms(5);enclr;}void initlcd(void){write_com(0x38);Delayms(5);write_com(0x01);Delayms(5);write_com(0x06);Delayms(5);write_com(0x0c);Delayms(5);}void writedate(uint adress,uint date) {write_com(adress);write_data(date);}void KBInit(void){PTDD &= 0b01110011; //键盘口复位PTGD &= 0b11100000;PTDDD &= 0b01110011; //定义列线(7-4位)为输入PTGDD &= 0b11101111;PTDPE |= 0b10001100; //输入引脚(列线)有内部上拉电阻PTGPE |= 0b00010000;PTGDD |= 0b00001111; //行线(3-0位)为输出KBI1SC &=~(1<<1); //屏蔽键盘中断(KBIE = 0)KBI1PE = (0|KBI1PE_KBIPE7_MASK|KBI1PE_KBIPE6_MASK|KBI1PE_KBIPE5_MASK|KBI1PE_KBIPE4_MASK); //允许输入引脚(列线)的中断可进入KBI1SC = (0|KBI1SC_KBACK_MASK); //清除键盘中断请求(KBACK = 1)}const uint KBtable[] ={0xEE,'9',0xDE,'A',0xBE,'B',0x7E,'C',0xED,'6',0xDD,'7',0xBD,'8',0x7D,'D',0xEB,'3',0xDB,'4',0xBB,'5',0x7B,'E',0xE7,'0',0xD7,'1',0xB7,'2',0x77,'F',0x00};uint KBDef(uint valve){uint KeyPress;uint i;i = 0;KeyPress = 0xff;while (KBtable[i] != 0x00) //在键盘定义表中搜索欲转换的键值,直至表尾{if(KBtable[i] == valve) //在表中找到相应的键值{KeyPress = KBtable[i+1];//取出对应的键定义值break;}i += 2; //指向下一个键值,继续判断}return KeyPress;}uint KBScan1(void){uint line,i,tmp,tmp1,tmp2;line=0b11111110; //使第一根行线为0(低电平)for (i = 1; i <= 4; i++) //最多将扫描4根行线{PTGD = line; //输出开始扫描asm("NOP");asm("NOP");tmp1 = PTDD;tmp2 = PTGD;//整合扫描结果，即键盘输入引脚的4位tmp = (tmp1 & 0x80); //输入扫描结果取7位数tmp1 &= 0x0C;//去2\3两位的数tmp1 = (tmp1<<3);//移到高位tmp |= tmp1;tmp |= (tmp2 & 0x1f);//整合所有数值//通过观察4根列线中是否出现低电平来判断当前行有无按键if ((tmp & 0xF0) != 0xF0) //当前行有键按下{break; //退出循环不再扫描}else //当前行无按键,准备扫描下一行line = (line << 1) | 0x01;}if (i == 5) //无按键,以后将返回0xFFtmp = 0xFF;return (tmp);}uint KBScanN(uint KB_count){uint i,KB_value_last,KB_value_now;if (0 == KB_count || 1 == KB_count) //先扫描一次得到的键值,便于下面比较return KBScan1();KB_value_now = KB_value_last = KBScan1();for (i=0; i<KB_count-1; i++) //以下多次扫描消除误差{Delay(15);KB_value_now = KBScan1();if (KB_value_now == KB_value_last)return KB_value_now; //返回扫描的键值elseKB_value_last = KB_value_now;}return 0xFF; //返回出错标志}void main(void){uint num=0;DisableInterrupts;MCUInit();mcu_init();Delayms(30);initlcd();write_com(0x80+0x40);for(num=0;num<11;num++){write_data(table[num]);Delayms(20);}KBInit(); // 键盘初始化KBI1SC |=(1<<1); // 开键盘中断EnableInterrupts; // 开总中断for(;;) ;}interrupt 22 void isrKeyBoard(void){uint value;uint i;static int j=0;for(i=0; i<50000; i++);DisableInterrupts; //关总中断KBI1SC &=~(1<<1); //屏蔽键盘中断KBI1SC|= KBISC_KBACK_MASK; //清中断标志位value = KBScanN(10); //扫描键值,存于value中if(value!=0xff){writedate(0x80+j,KBDef(value));//键值转化为定义值并发送j++;}PTDD&=0b01110011;PTGD&=0b11100000; //键盘初始化键盘中断KBI1SC |=(1<<1); //开放键盘中断EnableInterrupts ; //开总中断}3. 数码管程序#include <hidef.h> /* for EnableInterrupts macro */#include "derivative.h" /* include peripheral declarations */typedef unsigned char uint8;typedef unsigned short int uint16;const uint8 Dtable[10] =// 0 1 2 3 4 5 6 7 8 9 {0x3F,0x06,0x5B,0x4F,0x66, 0x6D,0x7D,0x07,0x7F,0x6F}; const uint8 CStable[4] =// 0 1 2 3{0xDF,0xEF,0xFD,0xFE};void Delay(uint16 count){uint8 i;uint16 j;for(j=0; j<count; j++)for(i=0; i<200; i++);}void MCUInit(void){SOPT = 0b01110000;ICGC2 = 0b00110000;ICGC1 = 0b01111000;while(!ICGS1_LOCK);}void LEDinit(void){PTBDD = 0xFF; //数据口为输出PTDDD |= 0x33; //位选口为输出}void LEDshow1(uint8 i, uint8 c){PTDD = CStable[i];PTBD = Dtable[c];}void LEDshow(uint8 *Buf){uint8 i,c;for (i = 0;i <= 3;i++){c = Buf[i]-'0';LEDshow1(i,c);Delay(100);}}void main(void){uint8 LEDBUF[4];LEDBUF[0]='2';LEDBUF[1]='0';LEDBUF[2]='1';LEDBUF[3]='2';DisableInterrupts;MCUInit();LEDinit();EnableInterrupts;for(;;){LEDshow(LEDBUF);}}4. 电子钟程序#include <hidef.h> /* for EnableInterrupts macro */#include "derivative.h" /* include peripheral declarations */ #define uchar unsigned char#define uint unsigned intunsigned char table[]=" 2012-5-3";unsigned char table1[]=" 00:00:00";#define rsout PTCDD |= (1<<4)#define rsset PTCD |= (1<<4)#define rsclr PTCD &=~(1<<4)#define rwout PTCDD |= (1<<6)#define rwset PTCD |= (1<<6)#define rwclr PTCD &=~(1<<6)#define enout PTFDD |= (1<<6)#define enset PTFD |= (1<<6)#define enclr PTFD &=~(1<<6)uchar shi=0,fen=0,miao=0;uint Count_200ms=0;void mcu_init(void);void MCUInit(void){SOPT = 0b01110000;ICGC2 = 0b00110000;ICGC1 = 0b01111000;while(!ICGS1_LOCK);}void Delayms(uint MS){uint i,j;for( i=0;i<MS;i++)for(j=0;j<1141;j++);}void TPM1Init(void){TPM1SC=(0|TPM1SC_TOIE_MASK|TPM1SC_CLKSA_MASK|TPM1SC_PS2_MASK|TPM1SC_PS1_MASK); //TPM1时钟源选择系统时钟(20MHZ), 分频因子64 TPM1MODH=0xF4;TPM1MODL=0x24; //根据时钟源及分频因子,将TPM1的定时时间设定为200msTPM1CNTH=0x00;TPM1CNTL=0x00;}void write_com(uchar com){rsclr;rwclr;enclr;PTAD=com;Delayms(5);enset;Delayms(5);enclr;}void write_data(uchar date){rsset;rwclr;PTAD=date;Delayms(5);enset;Delayms(5);enclr;}void initlcd(void){write_com(0x38);Delayms(5);write_com(0x01);Delayms(5);write_com(0x06);Delayms(5);write_com(0x0c);Delayms(5);}void write_sfm(uchar add,uchar date) {uchar si,ge;si=date/10;ge=date%10;write_com(0x80+0x40+add);write_data(0x30+si);write_data(0x30+ge);}void main(void){uint num=0;DisableInterrupts;MCUInit();mcu_init();Delayms(30);initlcd();TPM1Init();PTBDD=0XFF;PTBD=0XFF;EnableInterrupts;write_com(0x80);for(num=0;num<12;num++){write_data(table[num]);Delayms(20);}write_com(0x80+0x40);for(num=0;num<12;num++){write_data(table1[num]);Delayms(20);}for(;;){}}void mcu_init(void){PTADD = 0XFF;rsout;rwout;enout;}interrupt 11 void TPM1_200msover(void){uint temp;DisableInterrupts;Count_200ms++;while(Count_200ms==5){PTBD=~PTBD;miao++;if(miao==60){miao=0;fen++;if(fen==60){fen=0;shi++;if(shi==24){shi=0;}write_sfm(4,shi);}write_sfm(7,fen);}write_sfm(10,miao);Count_200ms=0;}temp=TPM1SC;TPM1SC&=~TPM1SC_TOF_MASK;EnableInterrupts;}5. AD转换程序#include <hidef.h> /* for EnableInterrupts macro */#include "derivative.h" /* include peripheral declarations */ typedef unsigned char uint8; // 8 位无符号数typedef unsigned short int uint16; // 16 位无符号数typedef unsigned long int uint32; // 32 位无符号数typedef char int8; // 8 位有符号数typedef short int int16; // 16 位有符号数typedef int int32; // 32 位有符号数uint8 LEDBUF[4];const uint8 Dtable[10] =// 0 1 2 3 4 5 6 7 8 9{0x3F,0x06,0x5B,0x4F,0x66, 0x6D,0x7D,0x07,0x7F,0x6F};//片选表(电平为低片选)const uint8 CStable[4] =// 0 1 2 3{0xDF,0xEF,0xFD,0xFE};void Delay(uint16 count){uint8 i;uint16 j;for(j=0; j<count; j++)for(i=0; i<200; i++);}void MCUInit(void){SOPT = 0b01110000;ICGC2 = 0b00110000;ICGC1 = 0b01111000;while(!ICGS1_LOCK);}void ADCInit(void){ADC1CFG = 0b11010001; //低功耗，4分频,长采样,8位模式,总线时钟2分频ADC1SC1 = 0b00000000;ADC1SC2 = 0b00000000; //软件触发,禁止比较功能}uint8 ADCV alue(uint8 channel){uint8 SC1_3;uint8 resultH;uint8 result; //1 选取通道号AD0-AD27 = 00000-11011channel &= 0b00011111; //取通道号变量的低五位(实际通道号)SC1_3 =ADC1SC1&(ADC1SC1_COCO_MASK|ADC1SC1_AIEN_MASK|ADC1SC1_AIEN_MASK);// 取ADC1SC1的高三位(取上电复位默认值000)// 单次转换, 禁止中断, 转换未完成ADC1SC1 = SC1_3 | channel; //合并上述8位//2 取A/D转换结果while ((ADC1SC1 & ADC1SC1_COCO_MASK) == 0); //未完成则执行空操作resultH = ADC1RH;result =ADC1RL;return result;}uint8 ADCMid(uint8 channel) //中值滤波{uint8 i,j,k,tmp;//1 取三次A/D转换结果i = ADCV alue(channel);j = ADCV alue(channel);k = ADCV alue(channel);//2 从三次A/D转换结果中取中值tmp = (i > j) ? j : i;tmp = (tmp > k) ? tmp : k;return tmp;}uint8 ADCAve(uint8 channel, uint8 n) //均值滤波{uint16 i;uint32 j;j = 0;for (i = 0; i < n; i++)j += ADCMid(channel);j = j/n;return (uint8)j;}//将AD转换得到的数值量还原为实际的电压值，将电压值的BCD码存储显示缓冲区void ADCV_V ol(uint8 ADC_V,uint8 *p){uint8 V,V1;V=(uint8)(ADC_V/51);V1=ADC_V%51;*p=V;V=(uint8)(V1*10)/51;V1=(V1*10)%51;*(p+1)=V;V=(uint8)(V1*10)/51;V1=(V1*10)%51;*(p+2)=V;V=(uint8)(V1*10)/51;*(p+3)=V;}void LEDinit(void){PTBDD = 0xFF; //数据口为输出PTBPE=0xff; //为B口输出配置上拉电阻PTBDS=0xff;PTDDD |= 0x33; //位选口为输出}void LEDshow1(uint8 i, uint8 c){PTDD = CStable[i];PTBD = Dtable[c];}void LEDshow(uint8 *Buf){uint8 i,c;for (i = 0;i <= 3;i++){c = Buf[i];LEDshow1(3-i,c);Delay(10);}}void main(void){uint8 V1V alue;LEDBUF[0]='0';LEDBUF[1]='0';LEDBUF[2]='0';LEDBUF[3]='0';DisableInterrupts;MCUInit(); //MCU初始化ADCInit(); //AD模块初始化LEDinit(); //LED数码块接口初始化EnableInterrupts;for(;;){V1V alue=ADCAve(15,50); //取得中值滤波法得到的AD转换数值ADCV_V ol(V1V alue,LEDBUF); //将AD转换数值转化为对应的电压值的LEDshow(LEDBUF) ; //LED数码块显示}}6. PWM程序#include <hidef.h> /* for EnableInterrupts macro */#include "derivative.h" /* include peripheral declarations */typedef unsigned char uint8; // 8 位无符号数typedef unsigned short int uint16; // 16 位无符号数typedef unsigned long int uint32; // 32 位无符号数typedef char int8; // 8 位有符号数typedef short int int16; // 16 位有符号数typedef int int32; // 32 位有符号数uint16 T1_Mod=0;void delay(uint16 count){uint8 i;uint16 j;for(j=0; j<count; j++)for(i=0; i<200; i++) ;}void MCUInit(void){SOPT = 0b01110000;ICGC2 = 0b00110000;ICGC1 = 0b01111000;while(!ICGS1_LOCK);}void TPM1Init(uint8 T1_p){uint16 temp;if(T1_p>200) T1_p=200; //(使用20M的总线频率作为时钟源，64分频，//最大定时时间不能超过200ms//设置TPM1禁止溢出中断,时钟源为总线时钟,64分频TPM1SC=0|TPM1SC_CLKSA_MASK|TPM1SC_PS2_MASK|TPM1SC_PS1_MASK;//0b00001110temp=(20000/64)*T1_p;T1_Mod=(uint16)temp;TPM1CNTH=0x00;TPM1CNTL=0x00;TPM1MODL=(uint8)T1_Mod; //设置TPM1的定时周期为50ms(50*1000/3.2=0x3D09)TPM1MODH=(uint8)(T1_Mod>>8);}void TPM1Ch_Init(void){TPM1C0SC=0|TPM1C0SC_MS0B_MASK|TPM1C0SC_MS0A_MASK|TPM1C0SC_ELS0B_MASK; //设置TPM1通道0不允许中断,PWM方式,高电平输出TPM1C0VL=0x00;TPM1C0VH=0x00;}void TPM1CH0_Run(uint8 percent){uint16 duty;uint8 dutyH,dutyL;duty=(T1_Mod/100)*percent;dutyH=duty/256;dutyL=duty%256;TPM1SC&=(~TPM1SC_CLKSA_MASK&~TPM1SC_CLKSB_MASK);TPM1CNTH=0x00;TPM1CNTL=0x00;TPM1MODL=(uint8)T1_Mod;TPM1MODH=(uint8)(T1_Mod>>8);TPM1C0VL=dutyL;TPM1C0VH=dutyH;TPM1SC=0|TPM1SC_CLKSA_MASK|TPM1SC_PS2_MASK|TPM1SC_PS1_MASK; }void main(void){MCUInit(); //MCU初始化DisableInterrupts;TPM1Ch_Init();TPM1Init(20);EnableInterrupts;for(;;){uint8 i;for(i=0;i<200;i++){if(i<=100)TPM1CH0_Run(i); //PWM脉冲输出elseTPM1CH0_Run(200-i);delay(200);}}}。