Solved Exam 2 for Computer Based Systems in Engineering | ECEN 3213, Exams of Electrical and Electronics Engineering

Download Solved Exam 2 for Computer Based Systems in Engineering | ECEN 3213 and more Exams Electrical and Electronics Engineering in PDF only on Docsity! @ ECEN 6253 Advanced Digital Computer Design & ECEN 3213 Spring ‘05 Exam 2 WRITE YOUR NAME HERE A AswCir All questions must be auswered on test paper! Opes Book, Opes Notes - All questions are for the 68HC711E9 mhicroprocessor. 1, (40 pts} Write complete assembly code for the following pseudo-code. If reset ocours, the program should start at “start”, byte Avar{10); Start: Avat{0] = 0; Avar[]]} = 1; for G=2;i< 10;i=i+1) Avarfi] = Avarfi-1] + Avar[i-2}: rg ° forbuop [da ~1x Avig 43 10 add, -2,% org fDboo sty 9X Stat [2x Haver [nx ida o inch, ela aX cmph yo Lata. \ bone lowy? sigs 1, % stop igh 2 arg SFFFE Inx db stant aX ECEN 3213 Spring ‘05 Exam 2 April 6, 2005 page 1 of 4 MB ECEN &2F3 Advanced Digital Computer Basign 2. (30 pts) The I/O ports are wired as shown. PRO : PBI 68HC7LIES PEO ee, PCO | f a. Write an assembly code fragment necessary to initialize the pins on port B, C and Eas input and outpot as shown. If'ne code is needed, say 30, Nowe pudd, puts abu ag) opt pot & S glungs Sgt ond pyere ie oniblshped 1 unfet carbowwhin ne stor dtp. . b. Write an assembly fragment to continuously read the switches connected to PEC and PCO, then display the values on the LEDs connected to PBO and PBI Tespectively. leap i PIE OB +feenyp pedi. HR guacovel ete Be TR Ab PRT bre tu? aud, Fy, pave ove ] {sibs sth snp c. Write an assembly code fragment to write bit 5 of the A register into the LED con- nected to PBI without changing the LED) connected to PBO. ‘ Gogh ty iititel Isrm Stb temp Ire oes \sv@ gta Port anha tuo 0710 Id port8 ECEN 3213 Spring ‘0S Bram 2 agell 6, 2005 page Zof¢