JTAG Joint Test Action Group Standard Test Access Port - - PowerPoint PPT Presentation

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Oct 22, 2023 428 likes •684 views

P ROGRAMMING AVR ON B READ B OARD Jatinder Singh Chhabra(200601120) Digvijay Singh (200601128) P ROGRAMMING AVR ON B READBOARD Programmer Circuit Circuit which is used to program a micro controller There are various techniques in

SLIDE 1

PROGRAMMING AVR ON BREAD BOARD

Jatinder Singh Chhabra(200601120) Digvijay Singh (200601128)

SLIDE 2

PROGRAMMING AVR ON BREADBOARD

 Programmer Circuit  Circuit which is used to program a micro controller  There are various techniques in practice and all of

them have their own advantages and disadvantages

SLIDE 3

INDEX

 LVP – Low Voltage Programming  HVSP – High Voltage System Programming  JTAG – Joint Test Action Group

SLIDE 4

LOW VOLTAGE PROGRAMMING

 Also called - In System Programming  Program micro-controller on chip along with all

peripheral devices

 Via SPI at working voltage of 2.7-6 V  Needs VCC, GND, RESET and 3pin for SPI

SLIDE 5

LOW VOLTAGE PROGRAMMING

 Advantages:  Less chance of accidental damage  No need for separate power supply  Dis-advantages:  If fuse bits like reset when disabled than LVP cannot be

done

SLIDE 6

LOW VOLTAGE PROGRAMMING

 Note:  Accidentally fuse bits changed and than high

voltage programming is needed

SLIDE 7

JTAG

 Joint Test Action Group  Standard Test Access Port  Boundary-Scan Architecture  method for testing interconnection (wire lines) on printed

circuit boards

 Used as an IC debug or probing port  JTAGEN Fuse needs to be enabled

SLIDE 8

JTAG

 Break and step in functions for extensive on-chip

debugging

SLIDE 9

HIGH VOLTAGE PROGRAMMING

 12V is applied to the RESET pin  All AVR devices can be programmed  The device is taken out of the system

SLIDE 10

HIGH VOLTAGE PROGRAMMING

 Advantages  Work even if fuse bits are set  Some devices can only be programmed using HVSP  Disadvantages  Need two different power supplies  12V can damage if there is current leakage  Need to remove all peripheral devices

SLIDE 11

COMPUTER INTERFACE

 USB  Serial Port(RS232)  Parallel Port

SLIDE 12

SERIAL

 Can be connected to SPI or USART  High Voltage circuit is complex and shown only for

completeness

SLIDE 13

http://electrons.psychogenic.com/modules/arms/art/5/AVRInSystemProgrammer.php

SERIAL LOW VOLTAGE PROGRAMMING CIRCUIT

SLIDE 14

SERIAL LOW VOLTAGE PROGRAMMING CIRCUIT

SLIDE 15

http://www.scienceprog.com/avr-serial-and-parallel-high-voltage-programmer/

SLIDE 16

DAPA

 Programming done through SPI  Parallel port is easily available on most of Systems  Pros and cons  Very simple circuit and cheap implementation  Keep parallel port cable short because clock is also

transmitted(SPI)

 Command to check if circuit is ready  # uisp -dprog=dapa

 Output : - Atmel AVR ATmega32 is found.

 100 Ω resisters are used to protect uC from voltage

spikes

SLIDE 17

DAPA CIRCUIT

http://www.captain.at/electronics/atmel-programmer/

SLIDE 18

USB PROGRAMMER

 Latest Generation of Programming Circuits.  Support for Universal Serial Bus (USB).  Programming done through SPI interface.

SLIDE 19

USB PROGRAMMER

http://www.ladyada.net/make/usbtinyisp/parts.html

SLIDE 20

USART

 Programming possible with Boot loader  Fuse bits cannot be changed  Useful for program upgrades

SLIDE 21

USART PROGRAMMERS

 Some Programmers come bundled with

microcontrollers which have bootloader installed on them.

 Their Programming circuit could be made extremely

simple.

 Example is a microcontroller with USART

bootloader preinstalled can be programmed with 4 wires Vcc, gnd, Tx, Rx.

 Negative point here will be that bundling software

n pc will also have to be constructed as default

programming softwares like avrdude or uisp may not understand the underlying protocol.

SLIDE 22

SOFTWARE

 With all the above circuit one requires a software on

computer.

 Linux  Uisp  avr-gcc  Windows  Avr-studio  ponyprog

SLIDE 23

NOTE

 Accidental changing fuse bits  Need to take care fuse bits get changed by mistake  Voltage Spike protection  High Baud rate need Crystal oscillators  Do not push an IC forcefully into the breadboard

SLIDE 24

PROGRAMMING AVR ON BREAD BOARD

Jatinder Singh Chhabra(200601120) Digvijay Singh (200601128)

PROGRAMMING AVR ON BREADBOARD

 Programmer Circuit  Circuit which is used to program a micro controller  There are various techniques in practice and all of

them have their own advantages and disadvantages

INDEX

 LVP – Low Voltage Programming  HVSP – High Voltage System Programming  JTAG – Joint Test Action Group

LOW VOLTAGE PROGRAMMING

 Also called - In System Programming  Program micro-controller on chip along with all

peripheral devices

 Via SPI at working voltage of 2.7-6 V  Needs VCC, GND, RESET and 3pin for SPI

LOW VOLTAGE PROGRAMMING

 Advantages:  Less chance of accidental damage  No need for separate power supply  Dis-advantages:  If fuse bits like reset when disabled than LVP cannot be

done

LOW VOLTAGE PROGRAMMING

 Note:  Accidentally fuse bits changed and than high

voltage programming is needed

JTAG

 Joint Test Action Group  Standard Test Access Port  Boundary-Scan Architecture  method for testing interconnection (wire lines) on printed

circuit boards

 Used as an IC debug or probing port  JTAGEN Fuse needs to be enabled

JTAG

 Break and step in functions for extensive on-chip

debugging

HIGH VOLTAGE PROGRAMMING

 12V is applied to the RESET pin  All AVR devices can be programmed  The device is taken out of the system

HIGH VOLTAGE PROGRAMMING

 Advantages  Work even if fuse bits are set  Some devices can only be programmed using HVSP  Disadvantages  Need two different power supplies  12V can damage if there is current leakage  Need to remove all peripheral devices

COMPUTER INTERFACE

 USB  Serial Port(RS232)  Parallel Port

SERIAL

 Can be connected to SPI or USART  High Voltage circuit is complex and shown only for

completeness

SERIAL LOW VOLTAGE PROGRAMMING CIRCUIT

SERIAL LOW VOLTAGE PROGRAMMING CIRCUIT

DAPA

 Programming done through SPI  Parallel port is easily available on most of Systems  Pros and cons  Very simple circuit and cheap implementation  Keep parallel port cable short because clock is also

transmitted(SPI)

 Command to check if circuit is ready  # uisp -dprog=dapa

 100 Ω resisters are used to protect uC from voltage

spikes

DAPA CIRCUIT

USB PROGRAMMER

 Latest Generation of Programming Circuits.  Support for Universal Serial Bus (USB).  Programming done through SPI interface.

USB PROGRAMMER

USART

 Programming possible with Boot loader  Fuse bits cannot be changed  Useful for program upgrades

USART PROGRAMMERS

 Some Programmers come bundled with

microcontrollers which have bootloader installed on them.

 Their Programming circuit could be made extremely

simple.

 Example is a microcontroller with USART

bootloader preinstalled can be programmed with 4 wires Vcc, gnd, Tx, Rx.

 Negative point here will be that bundling software

programming softwares like avrdude or uisp may not understand the underlying protocol.

SOFTWARE

 With all the above circuit one requires a software on

computer.

 Linux  Uisp  avr-gcc  Windows  Avr-studio  ponyprog

NOTE

 Accidental changing fuse bits  Need to take care fuse bits get changed by mistake  Voltage Spike protection  High Baud rate need Crystal oscillators  Do not push an IC forcefully into the breadboard

REFERENCES

 http://www.lancos.com/prog.html  http://electrons.psychogenic.com/modules/arms/art/

5/AVRInSystemProgrammer.php

 http://www.scienceprog.com/avr-serial-and-parallel-

high-voltage-programmer/

 http://support.atmel.no/bin/customer?=&action=vie

wKbEntry&id=343

 http://www.captain.at/electronics/atmel-

programmer/