【正文】 .0]輸入四位密碼，通過 模塊 ru 將先后輸入的四位密碼分別對應到相應的 p1[3..0], p2[3..0],P3[3..0], p4[3..0]。 基于 VHDL 的密碼鎖設計 10 q: IN STD_LOGIC_VECTOR(9 DOWNTO 0)。 b是 鍵盤數(shù)字的相或 。 elsif q=0000000100 then c=2。 elsif q=0001000000 then c=6。 end if。 p4=0。 當 a 為 1 時，將 c 的值賦給 p2。 t2: process(b,esc) begin if esc=39。 當 b 為高電平時， a 為 a+1。 USE 。 16 位二進制密碼輸入 。039。139。 and l=39。 end if。 若在輸入密碼 8739，則密碼鎖打開， l 為 1. 基于 VHDL 的密碼鎖設計 15 第五章 總結 畢業(yè)設計馬上就要結束了，意味著大學生涯的結束。 致謝 行文至此，我的畢業(yè)設計就要結束了，我的大學生涯也快畫上句號了。s personality characteristics and parameters Store, a speaker parameters database. In recognition, will be voice recognition and speaker parameters database matching, voice recognition and plete control of the keyboard. and activate or release of locks, the final pletion of the lock . System is relying on hardware and software to closely cooperate SCM flexible control achieved. Voice entry due to the interference of external environment, it is possible errors. but through a number of training can make parison and identification of voice greatly improved. LED displays in each LED through 5 20mA current to achieve the normal brightness, In order to meet the reliability of systems design, driven by a transistor circuit. The whole process showed that the use of dynamic, that is, six monitors each cycle, each sustained lms or 10 ms cycle again, can also be appropriate to make changes, but the refresh rate not less than 30 per second. so that temporary stay because of the visual phenomenon, Is six Qiduan see the LED display at the same time show. Enter key part of a total of the number keys, passwords, keys set, the key shown password, to confirm removal of keys and passwords. and other key 16 keys, enter your password and for the realization of function keys. This design uses a wakeup function keys of the 10 low eight IOAO ～ IOA7 t0 4 x 4 as the control input of the keyboard. which can be rational use of hardware resources and programming flexibility. Recognition keyboard keys are pressed whether the method is: Let all out lines are low, check the traffic on whether there is a highlevel if there is a statement that a key is pressed, if not, then no keys are pressed(Actual programming keys should be taken into account the :impact of jitter, usually always use the software delay processing methods Consumers buffeting). Identify specific keys used scanning method: homebyzero level out and check the level of the carriageway of the changes, if a line from the low level into a high, this trip can be sure this column crosspoint Button is pressed. System plete identification and display, the drive to realize the implementation of the electromagic lock function, and to detect its drive current value. To receive alarm signals sent by sensors, such as sending data. System receive the type code, and stored in FLASH in the password, if the correct password, the drive for the implementation of the electromagic lock, if your password is not correct, allowing operators to reenter your password, can enter up to three If the three are not correct, the MCU through intelligent munication lines to 基于 VHDL 的密碼鎖設計 19 monitor the police. System will unlock operation and each tune the electromagic actuator drive current value as a status information sent to the smart monitor. will receive the report from the sensor interface information is also sent to the intelligent monitoring, as smart Analysis of the basis. In the transmitter. electronic locks through the pulse transformer T will modulation good boost after data signals sent out in the receiver. pulse transformer T will receive the data signal demodulator buck evacuation to reduce the carrier signal transmission In the process of wear and tear. In order to reduce munication and mutual interference between the power supply, chokes L, the choice of coupling capacitance C to prehensive considerations, shown in Figure 4, a carrier frequency tD400kHz, in order to ensure that most of the energy transmission signal to the receiver Duan, L for a H, 一 surveillance function is to prevent the destruction of mmuication lines and electromagic actuator, for some reason the flow of electromagic coil currents too large burning Monitor by MAXIM pany39。它類似于含儲能元件的電感或電容的電路，如觸發(fā)器、鎖存器、計數(shù)器、移位寄存器、儲存器等電路都是時序電路的典型器件。電子密碼鎖已經(jīng)幫人們解決了許多問題。不同的聲音，不同的磁場域，不同的聲波，不同的光速光波，不同的圖像（例如指紋，口紋等等）來控制并打開鎖。 LED 顯示是由每個發(fā)光二極管通過 520ma 的電流來達到正常的亮度，為了滿足系統(tǒng)設計的可靠性，使用晶體管來驅(qū)動電路。 系統(tǒng)將每次開鎖操作和此時電磁執(zhí)行器的驅(qū)動電流值作為狀態(tài)信息發(fā)送給智能監(jiān)控器，同時將接收的來自傳感器接口的報警信號也發(fā)送給智能監(jiān)控器，把它作為智能化分