1 / 38

UBC104 Embedded Systems

UBC104 Embedded Systems. Microcontroller / 8051 family. Topics for Today. Microcontrollers Memory Registers Ports. Processors. General purpose processors: 80386 Pentium Core Duo Large number of pins External memory External peripherals . * Figure from Intel 386 DX Datasheet.

bart
Download Presentation

UBC104 Embedded Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. UBC104 Embedded Systems Microcontroller / 8051 family

  2. Topics for Today • Microcontrollers • Memory • Registers • Ports UBC 104 Embedded Systems

  3. Processors • General purpose processors: • 80386 • Pentium • Core Duo • Large number of pins • External memory • External peripherals * Figure from Intel 386 DX Datasheet UBC 104 Embedded Systems

  4. Functions of Pins • Designed to be generic • Indented to move data around * Figure from Intel 386 DX Datasheet UBC 104 Embedded Systems

  5. General Purpose Registers • Registers are dedicated for moving data • EAX, EBX, ECX, EDX: general purpose registers • EBP: Base pointer • ESP: Stack pointer • ESI, EDI: Index register UBC 104 Embedded Systems

  6. Pentium • Bigger, better, more * Figure from Intel Pentium Datasheet UBC 104 Embedded Systems

  7. Microcontrollers • Support for peripherals inside uController • Limited number of pins • Dedicated purpose • Controlling devices, taking measurements UBC 104 Embedded Systems

  8. Microcontroller Families • 68H12: Motorola 68H11, 68HC12, … • 8051: Intel 8051, 8052, 80251,… • PIC: Microchip PIC16F628, 18F452, 16F877, … • AVR: Atmel ATmega128, ATtiny28L, AT90S8515,… UBC 104 Embedded Systems

  9. Rita51J • 8051 • 128K of SRAM • 128K FLASH ROM • Serial port • Digital I/O lines * Figure from www.rigelcorp.com UBC 104 Embedded Systems

  10. Motes • Sensor nodes based on Atmel ATMega128 * Figures from CrossbowMPR-MIBUser Manual UBC 104 Embedded Systems

  11. AT91SAM7P64 • 16/32 bit ARM7TDMI • 64K Bytes Program Flash, 16K Bytes RAM, • USB 2.0 • 10 bit ADC 384 ksps 2x UARTs • I2C, SPI • 3x 32bit TIMERS • 4x PWM, WDT * Figure from www.olimex.com UBC 104 Embedded Systems

  12. AT91SAM7P64 * Figure from www.olimex.com UBC 104 Embedded Systems

  13. Microcontroller Families • 68H12: Motorola 68H11, 68HC12, … • 8051: Intel 8051, 8052, 80251,… • PIC: Microchip PIC16F628, 18F452, 16F877, … • AVR: Atmel ATmega128, ATtiny28L, AT90S8515,…  We are going to look at 8051s UBC 104 Embedded Systems

  14. 8051 History • Introduced 1980 • 12 MHz • 128 bytes Internal RAM • 4 kbytes ROM • 1 Serial port support UBC 104 Embedded Systems

  15. Typical features of modern 8051 • 32 input / output lines. • Internal data (RAM) memory - 256 bytes. • Up to 64 kbytes of ROM memory (usually flash) • Three 16-bit timers / counters • 9 interrupts (2 external) with two priority levels. • Low-power Idle- and Power-down modes UBC 104 Embedded Systems

  16. 8051 Manufacturers • AMD: Enhanced 8051 parts (no longer producing 80x51 parts) • Atmel: FLASH and semi-custom parts • Dallas: Battery backed, program download, and fastest variants • Intel: 8051 through 80c51gb / 80c51sl • ISSI: IS80C51/31 runs up to 40MHz • Matra: 80c154, low voltage static variants • OKI: 80c154, mask parts • Philips87c748 thru 89c588 - more variants than anyone else • now NXP • Siemens: 80c501 through 80c517a, and SIECO cores • SMC: COM20051 with ARCNET token bus network engine • SSI: 80x52, 2 x HDLC variant for MODEM use from http://www.faqs.org/faqs/microcontroller-faq/8051/ UBC 104 Embedded Systems

  17. Selection of Atmel 8051Devices * Figure from Atmel Function Spreadsheet UBC 104 Embedded Systems

  18. Datasheets – Your New Friends! * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  19. Packaging • Plastic Dual In-Line package (PDIL) * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  20. Packaging I • Very small Quad Flat Package (VQFP) * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  21. Packaging II • Plastic Leaded Chip Carrier (PLCC) * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  22. Packaging UBC 104 Embedded Systems

  23. Pin-Out of an 8051 UBC 104 Embedded Systems

  24. 8051 Components • Ports • RAM • Interrupt Controller • Timer • SPI Controller * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  25. MCBX51 Board UBC 104 Embedded Systems

  26. MCBx51 Board * Figure from MCBx51 Datasheet UBC 104 Embedded Systems

  27. 8051 Internal RAM * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  28. Special Function Registers (SFRs) * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  29. Special Function Registers (SFR) * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  30. Special Function Registers (SFR) * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  31. * Figure from Atmel AT89C51RD2 Datasheet UBC 104 Embedded Systems

  32. Pin-Out of an 8051 UBC 104 Embedded Systems

  33. Ports • Driving low-power peripherals ie. LEDs, relays UBC 104 Embedded Systems

  34. Port Defintion in Header Files #define Sfr(x, y) sfr x = y #define Sbit(x, y, z) sbit x = y^z #define Sfr16(x,y) sfr16 x = y /* BYTE Register */ Sfr (P0 , 0x80); Sbit (P0_7 , 0x80, 7); Sbit (P0_6 , 0x80, 6); Sbit (P0_5 , 0x80, 5); Sbit (P0_4 , 0x80, 4); Sbit (P0_3 , 0x80, 3); Sbit (P0_2 , 0x80, 2); Sbit (P0_1 , 0x80, 1); Sbit (P0_0 , 0x80, 0); Sfr (P1 , 0x90); Sbit (P1_7 , 0x90, 7); Sbit (P1_6 , 0x90, 6); Sbit (P1_5 , 0x90, 5); UBC 104 Embedded Systems

  35. Philips ARM LPC Example void Initialize() { /* Initialize PLL */ /* Setting Multiplier and divider values */ PLLCFG=0x25; feed(); /* Enabling the PLL */ PLLCON=0x1; feed(); /* Wait for the PLL to lock to set frequency */ while(!(PLLSTAT & PLOCK)){} /* Connect the PLL as the clock source */ PLLCON=0x3; feed(); ... UBC 104 Embedded Systems

  36. Another Example static unsigned short ADC_Read (unsigned char ch) { unsigned int i; ADCR = 0x00200300 | ch; // Init ADC & select channel ADCR |= 0x01000000; // Start A/D Conversion do { i = ADDR; // Read A/D Data Register } while ((i & 0x80000000) == 0); // Wait for end of A/D Conversion return (i >> 6) & 0x03FF; // bit 6:15 is 10 bit AD value } UBC 104 Embedded Systems

  37. Accessing Ports in C void main (void) { unsigned int i; /* Delay var */ unsigned char j; /* LED var */ while (1) { /* Loop forever */ for (j=0x01; j< 0x80; j<<=1) { /* Blink LED 0, 1, 2, 3, 4, 5, 6 */ P1 = j; /* Output to LED Port */ for (i = 0; i < 10000; i++) { /* Delay for 10000 Counts */ wait (); /* call wait function */ } } for (j=0x80; j> 0x01; j>>=1) { /* Blink LED 6, 5, 4, 3, 2, 1 */ P1 = j; /* Output to LED Port */ for (i = 0; i < 10000; i++) { /* Delay for 10000 Counts */ wait (); /* call wait function */ } } } } UBC 104 Embedded Systems

  38. Exercise 4 • Becoming familiar with the development environment: • Simulation & Execution on board • Debugging • Using peripherals Ports • Using low-level C e.g. bit-level operations UBC 104 Embedded Systems

More Related