once again

hello everybody,,, i would like to ask for help once again regarding the 8051 microcontroller. i need to design a rpm meter using 7segment display that display the count of DC motor rotation per minute. i have to use the infrared as the sensor to count the rotation of the dc motor per minute. BEENTHERE had brief me little bit about it, but i still don't manage to finish the project. i'm a beginner and still reading the MAZIDI book. anyone here could write the assembly language for me? and the design of the circuit? please.
here i attached also the roughly drew schematic of the project that i intend to do. thanks. -need your help-

 

Is this a school assignment?

 

Why asm. can you find a free high level language compiler? Why 8051?

 

this is my miniproject for microcontoller subject. here i attached the real schematic of the project. may you help me on the assembly language?? i have no idea to do the asm, because i'm just a beginner.