单片机控制秒表设计方案

秒表控制系统电气与信息工程学院电气11-1班20110522张婧内容简要作用目的总体结构硬件结构软件设计系统的作用和目的•数字秒表具有显示直观、读取方便、精度高等优点，在计时中广泛应用•该系统通过单片机控制数码管的段选位选，实现秒表从0.01s到99s的精确计数，系统中有两个开关按下T0开始计时，按下T1计时中止总体结构控制开关AT89S52单片机四位数码管位控制硬件介绍P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336XTAL119XATL218RST9PSEN29ALE30EA31P1.01P1.12P0.4/AD435P0.6/AD633P2.0/A821P2.1/A922P0.7/AD732P0.5/AD534P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427P3.5/T115P3.2/INT012P3.7/RD17P2.7/A1528P3.6/WR16P3.0/RXD10P3.1/TXD11P3.3/INT113P3.4/T014P1.23P1.34P1.45P1.67P1.56P1.78*Component_11KR?Res21KR?Res2S?SW-PBS?SW-PBGNDY2AY3BEY0Y1*Component_1GNDQ?QNPNQ?QNPNQ?QNPNQ?QNPN1KR?Res21KR?Res21KR?Res21KR?Res2VCCVCCVCCVCCf9g10e1d2c4DP5b6a71234DS??DpyBlue-CA187259463*Component_2VCC1KR?Res21KR?Res21KR?Res21KR?Res21KR?Res21KR?Res21KR?Res2VCC位选段选开关设定P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336XTAL119XATL218RST9PSEN29ALE30EA31P1.01P1.12P0.4/AD435P0.6/AD633P2.0/A821P2.1/A922P0.7/AD732P0.5/AD534P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427P3.5/T115P3.2/INT012P3.7/RD17P2.7/A1528P3.6/WR16P3.0/RXD10P3.1/TXD11P3.3/INT113P3.4/T014P1.23P1.34P1.45P1.67P1.56P1.78*Component_11KR?Res21KR?Res2S?SW-PBS?SW-PBGNDY2AY3BEY0Y1*Component_1GNDQ?QNPNQ?QNPNQ?QNPNQ?QNPN1KR?Res21KR?Res21KR?Res21KR?Res2VCCVCCVCCVCCf9g10e1d2c4DP5b6a71234DS??DpyBlue-CA187259463*Component_2VCC1KR?Res21KR?Res21KR?Res21KR?Res21KR?Res21KR?Res21KR?Res2VCCP0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336XTAL119XATL218RST9PSEN29ALE30EA31P1.01P1.12P0.4/AD435P0.6/AD633P2.0/A821P2.1/A922P0.7/AD732P0.5/AD534P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427P3.5/T115P3.2/INT012P3.7/RD17P2.7/A1528P3.6/WR16P3.0/RXD10P3.1/TXD11P3.3/INT113P3.4/T014P1.23P1.34P1.45P1.67P1.56P1.78*Component_11KR?Res21KR?Res2S?SW-PBS?SW-PBGNDY2AY3BEY0Y1*Component_1GNDQ?QNPNQ?QNPNQ?QNPNQ?QNPN1KR?Res21KR?Res21KR?Res21KR?Res2VCCVCCVCCVCCf9g10e1d2c4DP5b6a71234DS??DpyBlue-CA187259463*Component_2VCC1KR?Res21KR?Res21KR?Res21KR?Res21KR?Res21KR?Res21KR?Res2VCCP0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336XTAL119XATL218RST9PSEN29ALE30EA31P1.01P1.12P0.4/AD435P0.6/AD633P2.0/A821P2.1/A922P0.7/AD732P0.5/AD534P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427P3.5/T115P3.2/INT012P3.7/RD17P2.7/A1528P3.6/WR16P3.0/RXD10P3.1/TXD11P3.3/INT113P3.4/T014P1.23P1.34P1.45P1.67P1.56P1.78*Component_11KR?Res21KR?Res2S?SW-PBS?SW-PBGNDY2AY3BEY0Y1*Component_1GNDQ?QNPNQ?QNPNQ?QNPNQ?QNPN1KR?Res21KR?Res21KR?Res21KR?Res2VCCVCCVCCVCCf9g10e1d2c4DP5b6a71234DS??DpyBlue-CA187259463*Component_2VCC1KR?Res21KR?Res21KR?Res21KR?Res21KR?Res21KR?Res21KR?Res2VCC软件介绍定时器中断入口重装计数初值中断次数加1中断次数到10吗中断次数清零，0.01秒位加10.01秒位到10吗0.01秒位清零，0.1秒位加10.1秒位到10吗0.1秒位清零，1秒位加11秒位到10吗1秒位清零，10秒位加110秒位到10吗10秒位清零中断返回中断子程序外部中断0入口启动定时器T0TR0=1中断返回外部中断1入口停止计时TR1=0中断返回