VTech Alphabert s Magic Readport User Manual download pdf (Page 12)

Lab Manual of Microcontroller & Interfacing Page 12

C. Write C language program to read port P1, Compare content of port P1with data 80h. If

data at port P1 is greater than 80h, make port P0=0x00 and if data at port P1 is less than

or equal to 80h, make port P0=0xFF.

D. Write a program to sense lift door switch connected at port pin P2.0. Switch on the alarm

connected at port pin P2.1 if lift door is open. Write program in assembly and C language.

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VTech Alphabert s Magic Readport User Manual Page 12