[51] how to display . decimal point on to the LCD 16x2

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anilkumarm017@gmail.com

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i'am doing tachometer using microcontroller AT89s52 in this i'am using sensor to detect the pulses of motor and i want display the speed in lcd that is for below 100 rpm i want to display two decimal point and below 1000 rpm i have to display one decimal point and above 1000 rpm their won't be any decimal point please some one give me a code or else suggest me how to do that one.....!
 

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