Description: A, task,
Design and make a taxi meter.
Second, the required
1. Basic requirements
(1) different conditions have different charging standards.
L during the day
L in the evening
Waiting (& gt; 10min start charge)
(2) the unit price can be modified manually
(3) reset function with data
(4) simple requirements for IO port assignment
L distance detection using hall switch A44E
A switching switch for daytime/night fee standard
The zero switch of the l data
L unit price adjustment (preferably with + and - button)
(5) data output (using LCM103)
The unit price of l is 2 bits
L is two out of the way
The total amount of l is 3
(6) button
L start the timer switch
L data reset (zero)
Switch between day and night
2. Play part
L can store unit price and other data in case of power loss
L can display current system time
L voice broadcast data
Three, description,
(1) time requirement
L August 7th to 8th, two days.
L complete the actual circuit and summarize the report.
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