SP Duo Users Manual

SP Duo Users Manual
mbedded
reations
SP Duo
Users Manual
Copyright © Embedded Creations - 2004
2
SP Duo User Manual
Table of Contents
Introduction............................................................................................4
Features ..............................................................................................5
Getting Started .......................................................................................7
Requirements......................................................................................7
Supported Programming Software .....................................................8
Hardware Description ............................................................................9
LED Status .........................................................................................9
Cable Pinouts .....................................................................................9
Power ...............................................................................................10
Signals ..............................................................................................11
Programming........................................................................................13
SPI Programming .............................................................................13
JTAG Programming .........................................................................14
Programming Software ....................................................................15
Troubleshooting ...................................................................................17
Appendix 1: Fuse Programming...........................................................19
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Introduction
The SP Duo is an In-System Programmer for Atmel AVR micro
controllers. The SP Duo is unique with its ability to program though
both the normal SPI programming interface and the newer JTAG
interface supported by the latest AVRs. The SP Duo communicates
with the PC using the STK500 programming protocol created by Atmel,
and is compatible with programming software that supports Atmel's
STK500 board or AVRISP programmer.
SP Duo User Manual
Features
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Two programming interfaces: SPI + JTAG
Fast programming with JTAG
Fast programming with auto-adapting SPI clock
STK500 compatible programmer - compatible with existing PC
software and IDEs that support the STK500 protocol
Supports all AVR devices using SPI or JTAG programming
Supports all In-system-programming functions: programming +
readback of Flash, EEPROM, Fuses, Lockbits, and oscillator
calibration bytes
Programmer is firmware-upgradeable to support future AVR
devices
RS-232 interface
Draws power from target, no external power supply needed
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Introduction
Supported AVR Devices using SPI
ATmega8
ATmega8515
ATmega162
ATmega32
ATmega128
ATmega161
ATmega103
AT90S1200
AT90S2323
AT90S4433
AT90S8515
AT90S4414
AT90S4434
ATtiny12
ATtiny15
ATtiny13
ATtiny2313
ATmega8535
ATmega169
ATmega163
ATmega16
ATmega64
ATmega323
AT90S2343
AT90S8535
AT90S2313
AT90S2333
ATtiny26
ATtiny22
Supported AVR Devices using JTAG
ATmega16
ATmega162
ATmega32
ATmega64
ATmega128
ATmega323
ATmega169
*Note: all low-voltage counterparts are supported, e.g. ATmega8L, or
AT90LS8535, but are omitted from the list for clarity
Future AVR devices will be supported when they are released. If this
requires a firmware upgrade of the programmer, it will be made
available on the SP Duo website.
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SP Duo User Manual
Getting Started
Requirements
Target Requirements
Target voltage 3.0V-5.5V
Minimum target clock speed: 250kHz (only for SPI programming)
Minimum target clock speed for AT90S1200: 1MHz
System Requirements
115,200 baud RS-232 COM Port (USB to RS232 adapters are
supported)
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Getting Started
Supported Programming Software
AVR Studio 3.x
AVR Studio 4.x
STK500.exe (installed
with AVR Studio)
Imagecraft AVR
Compiler
Codevision AVR
Compiler
ChipBlasterAVR
AVRDUDE
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http://www.atmel.com
http://www.imagecraft.com
http://www.hpinfotech.ro/
http://savannah.nongnu.org/projects/avrdude/
http://winavr.sourceforge.net/
SP Duo User Manual
Hardware Description
LED Status
LED Color
Solid Green
Pulsing green and red
Intermittent Blinking Red
Solid Red (while running update
software)
Status
Programmer powered and Idle
Connected to target, target in
programming mode
Bootloader fail, use update
software to reprogram
Currently reprogramming
Cable Pinouts
Only one connector should be connected to your target board at a time.
The SP Duo auto-detects which connector is currently used.
SPI
JTAG
MOSI
VCC
TCK
GND
N/C
GND
TDO
VCC
RESET
GND
TMS
RESET
SCK
GND
N/C
N/C
MISO
GND
TDI
GND
Top view of programming connectors
The square pin is pin 1 (red conductor on the cable)
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Hardware Description
SPI
Signal
VCC
GND
RESET
SCK
MISO
MOSI
Pin #
2
4, 6, 8, 10
5
7
9
1
JTAG
Signal
VCC
GND
RESET
TCK
TDO
TDI
TMS
Pin #
4
2, 10
6
1
3
9
5
Power
The SP Duo requires a voltage supply from the target of 3.0V to 5.5V.
The maximum current draw from the target is under 50mA at 5.5V.
The target board’s power must be turned off when connecting or
disconnecting the SP Duo. ‘Hot-Swapping’ the programmer while the
target board’s power is on may damage the programmer.
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SP Duo User Manual
Signals
Common
Vcc
Gnd
Reset
Power supply to the programmer and the target micro
controller, must be between 3.0-5.5V
Ground reference
Connect directly to target reset pin (optional when
using JTAG). The reset pin on the target must be
pulled up to Vcc by a minimum 4.7k ohm resistor.
>4.7k
VCC
SP DUO
RESET
TARGET
RESET
Reset connection
SPI
SCK
MISO
MOSI
clock signal, from programmer
data signal, from target
data signal, from programmer
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Hardware Description
JTAG
TCK
TMS
TDI
TDO
clock signal, from programmer
control signal, from programmer
data signal, from programmer
data signal, from target
LOAD
SP DUO
TARGET
Series resistors used on shared programming pins
The programming pins on the target micro controller can be connected
to other parts of the system as general I/O lines, as long as the system
does not interfere with the programmer’s signals during programming.
Series resistors can be used to separate the load from the programming
lines. The programmer should be connected to the target micro
controller directly without any series resistors.
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SP Duo User Manual
Programming
SPI Programming
When SPI programming, the target needs to be supplied with a clock
source, either connected to the external XTAL pins, or with an internal
oscillator. The SP Duo supports target clock speeds of 250kHz and
above (1MHz and above for the AT90S1200). If the target clock speed
is lower than the minimum, entering program mode will fail.
The SCK clock signal used for programming is sampled by the target
AVR, and must be at least twice as slow as the target’s clock speed for
programming to work. The SP Duo is able to detect the fastest SCK
speed the target can support to program the target as quickly as possible.
Especially when programming devices with large Flash, the speed
difference between programming a target with a fast clock and a target
with a slower clock can be seen. Targets at 8MHz and above are all
clocked at the same SCK speed.
To program using the SPI interface, the target’s SPIEN fuse needs to be
programmed. New AVRs supporting SPI programming come from the
factory with this fuse programmed. If this fuse is mistakenly cleared, it
will need to be reprogrammed using either Parallel Programming (using
the STK500 programmer from Atmel), or JTAG if the device supports
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Programming
it. When programming the target’s fuses, take care to ensure the fuse
values are correct. (See Appendix 1)
JTAG Programming
The SP Duo does not support JTAG programming in a chain of devices.
The SP Duo must be connected to the target AVR directly, and not to
any other JTAG devices.
There is no minimum target clock frequency for JTAG programming.
Programming will succeed even with the target clock stopped
completely.
To program using the JTAG Interface, the JTAGEN fuse needs to be
programmed. New AVRs supporting JTAG come from the factory with
this fuse programmed. If this fuse is mistakenly cleared, it will need to
be reprogrammed either using SPI programming, or Parallel
Programming (using the STK500 programmer from Atmel). When
programming the target’s fuses, take care to ensure the fuse values are
correct. (See Appendix 1)
The reset line only needs to be connected to the target micro controller
in certain cases. The target AVR can disable the JTAG pins in firmware
by setting the JTD bit in the MCUCSR register. If your target's
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SP Duo User Manual
firmware sets this bit, the SP Duo must be able to reset the target to
enable the JTAG pins during programming.
When programming the EEPROM through JTAG, bits are only cleared,
never set. The chip must be erased to reset the EEPROM bits to all 1's
before programming. If the EESAVE fuse is programmed (EEPROM
memory is preserved through the chip erase cycle), the EEPROM will
not be reset during a chip erase. To reset the EEPROM before
programming, clear the EESAVE fuse, erase the chip, and reprogram
the EESAVE fuse.
Programming Software
This section is intended to list any special notes on using programming
software with the SP Duo. Please refer to the individual programming
software’s documentation for detailed instructions on its use.
AVR Studio 4.x and 3.x
If a firmware version message appears when opening the programming
window, ignore and press cancel.
Under the Board tab, writing an oscillator value to the programmer fails.
This feature is not needed with the SP Duo’s auto-adapting SPI clock.
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Programming
The upgrade feature is not supported, upgrade software will be available
on the SP Duo website when new firmware is released.
The "Serial programming downloading (SPI) Enabled" fuse cannot be
changed, even when programming using JTAG. You must use other
software to change this bit.
STK500.EXE
This command-line program is found in the \stk500 directory where
AVR Studio was installed.
Writing an oscillator value to the programmer fails, this feature is not
needed with the SP Duo’s auto-adapting SPI clock.
Imagecraft AVR Compiler
Choose STK-500 from the list of programmers under programming
options.
Codevision AVR Compiler and ChipBlasterAVR
Choose STK-500 from the list of programmers.
AVRDUDE
Use the “stk500” programmer type.
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SP Duo User Manual
Troubleshooting
The LED is off:
Power not supplied to target
Verify VCC pin is supplied with
3.0V-5.5V from target
Can’t enter programming mode on target:
Incorrect pinout
SPIEN/JTAGEN fuse cleared
Reset pin used as general I/O
Not enough power
Target has no clock (SPI only)
Programming pins are heavily
loaded
Verify pinout
Program fuse using Parallel
Programming
Clear fuse using Parallel
Programming
Verify the target can supply
enough power to the programmer
Verify the target is clocked at
250kHz minimum (1MHz
minimum for AT90S1200)
Use series resistors to separate
load from shared programming
pins
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Troubleshooting
Software can’t communicate with programmer:
COM port is in use
Verify the COM port is not
being used by software
To test communication with the programmer, a terminal program can be
used. Open the COM port the SP Duo is attached to at 115,200 baud, 8N-1. Type Ctrl-V into the terminal window, and the programmer will
reply “SP Duo vX.X” if communication is correct.
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SP Duo User Manual
Appendix 1: Fuse Programming
It is easy to get confused when programming fuses, because a
“programmed” fuse is a logical 0, and a “cleared” fuse is a logical 1.
The easiest way to program fuses is using Atmel’s AVR Studio
software, which has a GUI where individual fuse settings can be
selected with check boxes - a checked box represents the fuse is
programmed. The options can be visually reviewed before
programming. The other programming software represent the fuses with
hexadecimal values, and more care must be taken by the user to ensure
the correct fuse settings are being programmed.
Programming the wrong fuse values can prevent you from programming
again. The most important fuses to avoid setting to the wrong value are:
• Programming enable fuses (SPIEN for SPI, and JTAGEN for
JTAG)
• Clock source – if you change your clock from internal
oscillator to external oscillator and you do not have one, you
will not be able to use SPI
• Reset Disable – if the reset line is set as a general I/O pin, SPI
programming will not work
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