单片机复习程序.ppt

单片机 考试复习题 从左到右的流水灯 名称 从左到右的流水灯说明 接在P0口的8个LED从左到右循环依次点亮 产生走马灯效果 include include defineucharunsignedchar defineuintunsignedint 延时voidDelayMS uintx uchari while x for i 0 i 120 i 主程序voidmain P0 0 xfe while 1 P0 crol P0 1 P0的值向左循环移动DelayMS 150 电路图 交通灯 名称 LED模拟交通灯说明 东西向绿灯亮若干秒 黄灯闪烁5次后红灯亮 红灯亮后 南北向由红灯变为绿灯 若干秒后南北向黄灯闪烁5此后变红灯 东西向变绿灯 如此重复 include defineucharunsignedchar defineuintunsignedint sbitRED A P0 0 东西向灯sbitYELLOW A P0 1 sbitGREEN A P0 2 sbitRED B P0 3 南北向灯sbitYELLOW B P0 4 sbitGREEN B P0 5 ucharFlash Count 0 Operation Type 1 闪烁次数 操作类型变量 延时voidDelayMS uintx uchari while x for i 0 i 120 i 交通灯切换voidTraffic Light switch Operation Type case1 东西向绿灯与南北向红灯亮RED A 1 YELLOW A 1 GREEN A 0 RED B 0 YELLOW B 1 GREEN B 1 DelayMS 2000 Operation Type 2 break case2 东西向黄灯闪烁 绿灯关闭DelayMS 300 YELLOW A YELLOW A GREEN A 1 if Flash Count 10 return 闪烁5次Flash Count 0 Operation Type 3 break case3 东西向红灯 南北向绿灯亮RED A 0 YELLOW A 1 GREEN A 1 RED B 1 YELLOW B 1 GREEN B 0 DelayMS 2000 Operation Type 4 break case4 南北向黄灯闪烁5次DelayMS 300 YELLOW B YELLOW B GREEN B 1 if Flash Count 10 return Flash Count 0 Operation Type 1 主程序voidmain while 1 Traffic Light 交通灯电路 单只数码管循环显示0 9 名称 单只数码管循环显示0 9说明 主程序中的循环语句反复将0 9的段码送至P0口 使数字0 9循环显示 include include defineucharunsignedchar defineuintunsignedintucharcodeDSY CODE 0 xc0 0 xf9 0 xa4 0 xb0 0 x99 0 x92 0 x82 0 xf8 0 x80 0 x90 0 xff 延时voidDelayMS uintx uchart while x for t 0 t 120 t 主程序voidmain uchari 0 P0 0 x00 while 1 P0 DSY CODE i i i 1 10 DelayMS 300 8只数码管动态显示多个不同字符电路 8只数码管动态显示多个不同字符 名称 8只数码管动态显示多个不同字符说明 数码管动态扫描显示0 7 include include defineucharunsignedchar defineuintunsignedintucharcodeDSY CODE 0 xc0 0 xf9 0 xa4 0 xb0 0 x99 0 x92 0 x82 0 xf8 0 x80 0 x90 延时voidDelayMS uintx uchart while x for t 0 t 120 t 主程序 voidmain uchari wei 0 x80 while 1 for i 0 i 8 i P0 0 xff P0 DSY CODE i 发送段码wei crol wei 1 P2 wei 发送位码DelayMS 2 K1 K4按键状态显示 11上海师范大学信息与机电工程学院 倪继锋 名称 K1 K4按键状态显示说明 K1 K2按下时LED点亮 松开时熄灭 K3 K4按下并释放时LED点亮 再次按下并释放时熄灭 include defineucharunsignedchar defineuintunsignedintsbitLED1 P0 0 sbitLED2 P0 1 sbitLED3 P0 2 sbitLED4 P0 3 sbitK1 P1 0 sbitK2 P1 1 sbitK3 P1 2 sbitK4 P1 3 延时voidDelayMS uintx uchari while x for i 0 i 120 i 延时voidDelayMS uintx uchari while x for i 0 i 120 i 主程序voidmain P0 0 xff P1 0 xff while 1 LED1 K1 LED2 K2 if K3 0 while K3 0 LED3 LED3 if K4 0 while K4 0 LED4 LED4 DelayMS 10 K1 K4按键状态显示电路 INT0中断计数 名称 INT0中断计数说明 每次按下计数键时触发INT0中断 中断程序累加计数 计数值显示在3只数码管上 按下清零键时数码管清零 include defineucharunsignedchar defineuintunsignedint 0 9的段码ucharcodeDSY CODE 0 x3f 0 x06 0 x5b 0 x4f 0 x66 0 x6d 0 x7d 0 x07 0 x7f 0 x6f 0 x00 计数值分解后各个待显示的数位ucharDSY Buffer 0 0 0 ucharCount 0 sbitClear Key P3 6 数码管上显示计数值voidShow Count ON DSY DSY Buffer 2 Count 100 获取3个数DSY Buffer 1 Count 100 10 DSY Buffer 0 Count 10 DSY Buffer 1 Count 100 10 DSY Buffer 0 Count 10 if DSY Buffer 2 0 高位为0时不显示 DSY Buffer 2 0 x0a if DSY Buffer 1 0 高位为0 若第二位为0同样不显示DSY Buffer 1 0 x0a P0 DSY CODE DSY Buffer 0 P1 DSY CODE DSY Buffer 1 P2 DSY CODE DSY Buffer 2 主程序voidmain P0 0 x00 P1 0 x00 P2 0 x00 IE 0 x81 允许INT0中断IT0 1 下降沿触发while 1 if Clear Key 0 Count 0 清0Show Count ON DSY INT0中断函数voidEX INT0 interrupt0 Count 计数值递增 INT0中断计数电路 10s的秒表 名称 10s的秒表说明 首次按键计时开始 再次按键暂停 第三次按键清零 include defineucharunsignedchar defineuintunsignedintsbitK1 P3 7 uchari Second Counts Key Flag Idx bitKey State ucharDSY CODE 0 x3f 0 x06 0 x5b 0 x4f 0 x66 0 x6d 0 x7d 0 x07 0 x7f 0 x6f 延时voidDelayMS uintms uchart while ms for t 0 t 120 t 处理按键事件voidKey Event Handle if Key State 0 Key Flag Idx Key Flag Idx 1 3 switch Key Flag Idx case1 EA 1 ET0 1 TR0 1 break case2 EA 0 ET0 0 TR0 0 break case0 P0 0 x3f P2 0 x3f i 0 Second Counts 0 主程序voidmain P0 0 x3f 显示00P2 0 x3f i 0 Second Counts 0 Key Flag Idx 0 按键次数 取值0 1 2 3 Key State 1 按键状态TMOD 0 x01 定时器0方式1TH0 65536 50000 256 定时器0 15msTL0 65536 50000 256 while 1 if Key State K1 DelayMS 10 Key State K1 Key Event Handle T0中断函数voidDSY Refresh interrupt1 TH0 65536 50000 256 恢复定时器0初值TL0 65536 50000 256 if i 2 50ms 2 0 1s转换状态 i 0 Second Counts P0 DSY CODE Second Counts 10 P2 DSY CODE Second Counts 10 if Second Counts 100 Second Counts 0 满100 10s 后显示00 10s的秒表电路 定时器控制交通指示灯 名称 定时器控制交通指示灯说明 东西向绿灯亮5s后 黄灯闪烁 闪烁5次亮红灯 红灯亮后 南北向由红灯变成绿灯 5s后南北向黄灯闪烁 闪烁5次后亮红灯 东西向绿灯亮 如此往复 include defineucharunsignedchar defineuintunsignedintsbitRED A P0 0 东西向指示灯sbitYELLOW A P0 1 sbitGREEN A P0 2 sbitRED B P0 3 南北向指示灯sbitYELLOW B P0 4 sbitGREEN B P0 5 延时倍数 闪烁次数 操作类型变量ucharTime Count 0 Flash Count 0 Operation Type 1 定时器0中断函数voidT0 INT interrupt1 TL0 50000 256 TH0 50000 256 switch Operation Type case1 东西向绿灯与南北向红灯亮5sRED A 0 YELLOW A 0 GREEN A 1 RED B 1 YELLOW B 0 GREEN B 0 if Time Count 100 return 5s 100 50ms 切换Time Count 0 Operation Type 2 break case2 东西向黄灯开始闪烁 绿灯关闭if Time Count 8 return Time Count 0 YELLOW A YELLOW A GREEN A 0 if Flash Count 10 return 闪烁Flash Count 0 Operation Type 3 break case3 东西向红灯与南北向绿灯亮5sRED A 1 YELLOW A 0 GREEN A 0 RED B 0 YELLOW B 0 GREEN B 1 if Time Count 100 return 5s 100 50ms 切换Time Count 0 Operation Type 4 break case4 南北向黄灯开始闪烁 绿灯关闭if Time Count 8 return Time Count 0 YELLOW B YELLOW B GREEN A 0 if Flash Count 10 return 闪烁Flash Count 0 Operation Type 1 break 主程