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Department of Mathematics, Statistics, and Computer Science

Department of Mathematics, Statistics, and Computer Science. An Experimental Laboratory Environment for Teaching Embedded Hardware Systems. Dennis Brylow. Hardware Systems. What makes a good intro Hardware Systems course? Hands-on experience with hardware

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Department of Mathematics, Statistics, and Computer Science

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  1. Department of Mathematics, Statistics, and Computer Science An Experimental Laboratory Environment for Teaching Embedded Hardware Systems Dennis Brylow

  2. Hardware Systems • What makes a good intro Hardware Systems course? • Hands-on experience with hardware • Hands-on experience with lowest levels of software • Focus on how hardware and software concerns are • interrelated. • Integration with rest of curriculum • There is no magic in the box!

  3. Experimental Labs What goes into a good experimental computer systems laboratory environment? • Purdue XINU Laboratory: • Consoles • Booting • Rebooting

  4. [Image courtesy Digi]

  5. ... • sread: .word 0 ! sectors read of current track • head: .word 0 ! current head • track: .word 0 ! current track • read_it: • mov al,setup_sects • inc al • mov sread,al • mov ax,es • test ax,#0x0fff • die: jne die ! es must be at 64kB boundary • xor bx,bx ! bx is starting address within segment • rp_read: • #ifdef __BIG_KERNEL__ • #define CALL_HIGHLOAD_KLUDGE .word 0x1eff,0x220 ! call far * bootsect_kludge • ! NOTE: as86 can't assemble this • CALL_HIGHLOAD_KLUDGE ! this is within setup.S • #else • mov ax,es • sub ax,#SYSSEG • #endif • cmp ax,syssize ! have we loaded all yet? • ... [Code GPLed under Linux]

  6. The Solution • Need a coherent strategy to drive hands-on laboratory • work in Hardware Systems, Operating Systems, • perhaps extending to Embedded Systems, • Networking and Internetworking, Compilers, etc. • Flexible • Extensible • Hands-on • Modern • Challenging • Interesting • Inexpensive • Duplicable

  7. [Image courtesy Linksys]

  8. Broadcom 5352 [Diagram courtesy Broadcom]

  9. Programming Environment Standard C Language execution environment Obeys MIPS calling convention Buffered I/O getchar(), putchar(), printf() Starter I/O functions getInt(), printInt() Memory allocation malloc() and free() Also sleep() and halt(), process management, and interrupt facilities available.

  10. Course Objectives • Principles • Major hardware components • Solve problems in Assembler • Platform-specific knowledge for later courses in O/S, networking, etc. • Development environment

  11. Course Topics • Digital Logic, combinational and sequential • Data Representation • Processors and Pipelines • Instruction Sets, both RISC and CISC • Assembly and addressing modes • Activation Records • Memory and Storage, virtual memory and caching • I/O and busses • Interrupts

  12. Assignments • Basic Assembler Operations • I/O maniulation • Functions and calling conventions • Recursion and Activation Records • Pointers and Memory • Device I/O • Interrupts

  13. Future Work: • Embedded Systems Course, • Internetworking Course, • IP telephony • Real-time constructs, • Provable guarantees, • World Conquest...

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