Microprocessor lab 3 prelab.doc

Hui ZhangLab39-11-12SECTION: 1539LAB3 Pre-laboratory ReportSection 1:1.1 Program DescriptionPart2: Write an Assembly code program that find the maximum score and minimum score from a list of test scores using two for-loops.Part3: Set up an 8 bit LED display on the F28335 board, which allows us to see the program is doing through the LED lights. It is for debugging purpose. Part4: Add a 4 bit DIP switch onto the F28335 board. This allows us to input information during program execution.1.2 Flowchart1.3 Schematic1.4 Problems EncounteredWhile writing the assembly code, I had a problem where I tried to copy the score_vector_len to the counter. Apparently, it doesnt work if I simply write MOV *AR3, *AR2 (where AR3 = score_vector_len and AR2 = counter). I couldnt compile it with that line of code. Instead, I had to move the score_vector_len to accumulator, and then copy the value in accumulator to the destination AR2, which is counter.Also, I had a lot of problems with writing the test program for LED and switch. The email from EEL4744 group helped me solve this problem.1.5 Future Work/ApplicationsTo go future after finding the minimum and maximum, we can look into finding outliers from a list of grades or even create a list of ranked score.1.6 Program Code2 ; Lab3: Assembly programming & Elementary Wiring3 ; Hui Zhang4 .global_c_int005 ;-6 ;constants7 ;-8 score_addr.set0xA002;set starting address for the score vectors in memory9 score_vector_len.set0xA001;address of the vector_length10 data_sect.set0xa000;constant that is actually the starting addr of .data section11 bss_sect.set0xb000;constant that is actually the starting addr of .bss section12 ;-1314 ;* DATA ALLOCATION SECTION - Variables/Data *15 .data;data section starts at 0xA0001617 counter.word0h; empty it first18 vector_length.word5192021 scores.word33; 0-100, create the scores22 .word5023 .word6524 .word825 .word202627 .bssmax_addr, 128 .bssmin_addr, 129 .globalscore_addr,score_vector_len,counter,vector_length,num4,counter,scores,max_addr,min_addr30 .text31 _c_int00: ;PROGRAM STARTS HERE3233 MOV AR0, #score_addr34 MOV AR1, #max_addr35 MOV AR2, #score_vector_len36 MOV AR3, #counter37 MOV AL, *AR238 MOV *AR3, AL39 DEC *AR340 MOV AL, #041 MOVAL, *AR042 MOV *AR1, AL43 LOOP1INC AR044 MOV AL, *AR045 SUB AL, *AR146 BYES1, LT47 MOV AL, *AR048 MOV *AR1, AL49 YES1DEC *AR3;decrement counter50 BLOOP1, NEQ51 NOP52 NOP5354 ;find min_score55 MOV AR0, #score_addr56 MOV AR1, #min_addr57 MOV AR2, #score_vector_len58 MOV AR3, #counter59 MOV AL, *AR260 MOV *AR3, AL;put the length to counter61 DEC *AR362 MOV AL, #0;empty the AL6364 MOVAL, *AR065 MOV *AR1, AL66 LOOP2