Morse Code on 8051s - Distributed Systems Group

Transcript Morse Code on 8051s - Distributed Systems Group

UBC104
Embedded Systems
Microcontroller / 8051 family
Topics for Today
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Microcontrollers
Memory
Registers
Ports
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Processors
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General purpose
processors:
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80386
Pentium
Core Duo
Large number of pins
External memory
External peripherals
* Figure from Intel 386 DX Datasheet
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Functions of Pins
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Designed to be generic
Indented to move data around
UBC 104 Embedded Systems
* Figure from Intel 386 DX Datasheet
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General Purpose Registers
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Registers are dedicated for
moving data
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EAX, EBX, ECX, EDX: general
purpose registers
EBP: Base pointer
ESP: Stack pointer
ESI, EDI: Index register
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Pentium
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Bigger,
better,
more
* Figure from Intel Pentium Datasheet
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Microcontrollers
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Support for peripherals inside uController
Limited number of pins
Dedicated purpose
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Controlling devices, taking measurements
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Microcontroller Families
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68H12: Motorola 68H11, 68HC12, …
8051: Intel 8051, 8052, 80251,…
PIC:
Microchip PIC16F628, 18F452, 16F877, …
AVR: Atmel ATmega128, ATtiny28L, AT90S8515,…
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Rita51J
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8051
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128K of SRAM
128K FLASH ROM
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Serial port
Digital I/O lines
* Figure from www.rigelcorp.com
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Motes
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Sensor nodes based on Atmel ATMega128
* Figures from CrossbowMPR-MIBUser Manual
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AT91SAM7P64
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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
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AT91SAM7P64
* Figure from www.olimex.com
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Microcontroller Families
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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
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8051 History
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Introduced 1980
12 MHz
128 bytes Internal RAM
4 kbytes ROM
1 Serial port support
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Typical features of modern 8051
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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
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8051 Manufacturers
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AMD: Enhanced 8051 parts (no longer producing 80x51 parts)
Atmel: FLASH and semi-custom parts
Dallas: Battery backed, program download, and fastest variants
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Intel: 8051 through 80c51gb / 80c51sl
ISSI: IS80C51/31 runs up to 40MHz
Matra: 80c154, low voltage static variants
OKI: 80c154, mask parts
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Philips87c748 thru 89c588 - more variants than anyone else
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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/
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Selection of Atmel 8051Devices
Device
Flash
(Kbytes)
RAM
(Bytes)
F.max
(MHz)
Vcc
(V)
I/O
Pins
UA
RT
16-bit
Timer
s
SPI
10-bit
A/D
channel
s
AT89C5115
16
512
40
3-5.5
20
1
2
--
8
AT89C51AC2
32
1280
40
3-5.5
34
1
3
--
8
AT89C51AC3
64
2304
60
3-5.5
32
1
3
Yes
8
AT89C51ED2
64
2048
60
2.7-5.5
32
1
3
Yes
--
AT89C51IC2
32
1280
60
2.7-5.5
34
1
3
Yes
--
AT89C51ID2
64
2048
60
2.7-5.5
32
1
3
Yes
--
AT89C51RB2
16
1280
60
2.7-5.5
32
1
3
Yes
--
AT89C51RC
32
512
33
4.0-6.0
32
1
3
--
--
AT89C51RC2
32
1280
60
2.7-5.5
32
1
3
Yes
--
AT89C51RD2
64
2048
60
2.7-5.5
32
1
3
Yes
--
AT89C51RE2
128
2048
60
2.7-5.5
34
2
3
Yes
--
* Figure from Atmel Function Spreadsheet
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Datasheets – Your New Friends!
* Figure from Atmel AT89C51RD2 Datasheet
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Packaging
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Plastic Dual In-Line package (PDIL)
* Figure from Atmel AT89C51RD2 Datasheet
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Packaging I
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Very small Quad Flat Package (VQFP)
* Figure from Atmel AT89C51RD2 Datasheet
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Packaging II
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Plastic Leaded Chip Carrier (PLCC)
* Figure from Atmel AT89C51RD2 Datasheet
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Packaging
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Pin-Out of an 8051
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8051 Components
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Ports
RAM
Interrupt Controller
Timer
SPI Controller
* Figure from Atmel AT89C51RD2 Datasheet
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MCBX51 Board
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MCBx51 Board
* Figure from MCBx51 Datasheet
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8051 Internal RAM
* Figure from Atmel AT89C51RD2 Datasheet
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Special Function Registers
(SFRs)
* Figure from Atmel AT89C51RD2 Datasheet
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Special Function Registers (SFR)
* Figure from Atmel AT89C51RD2 Datasheet
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Special Function Registers (SFR)
* Figure from Atmel AT89C51RD2 Datasheet
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* Figure from Atmel AT89C51RD2 Datasheet
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Pin-Out of an 8051
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Ports
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Driving low-power peripherals ie. LEDs, relays
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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);
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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();
...
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Another Example
static unsigned short ADC_Read (unsigned char ch) {
unsigned int i;
ADCR = 0x00200300 | ch;
ADCR |= 0x01000000;
do {
i = ADDR;
} while ((i & 0x80000000) == 0);
// Init ADC & select channel
return (i >> 6) & 0x03FF;
}
// bit 6:15 is 10 bit AD value
// Start A/D Conversion
// Read A/D Data Register
// Wait for end of A/D Conversion
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Accessing Ports in C
void main (void) {
unsigned int i;
unsigned char j;
/* Delay var */
/* LED var */
while (1) {
for (j=0x01; j< 0x80; j<<=1) {
P1 = j;
for (i = 0; i < 10000; i++) {
wait ();
}
}
for (j=0x80; j> 0x01; j>>=1) {
P1 = j;
for (i = 0; i < 10000; i++) {
wait ();
}
}
/* Loop forever */
/* Blink LED 0, 1, 2, 3, 4, 5, 6 */
/* Output to LED Port */
/* Delay for 10000 Counts */
/* call wait function */
/* Blink LED 6, 5, 4, 3, 2, 1 */
/* Output to LED Port */
/* Delay for 10000 Counts */
/* call wait function */
}
}
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Exercise 4
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Becoming familiar with the development
environment:
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Simulation & Execution on board
Debugging
Using peripherals Ports
Using low-level C e.g. bit-level operations
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Morse Code on 8051s - Distributed Systems Group

Transcript Morse Code on 8051s - Distributed Systems Group

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