SP Duo Users Manual
Contents
1. reations SP Duo Users Manual Copyright Embedded Creations 2004 SP Duo User Manual Table of Contents Introduction ua epe eg ae aes 4 sue edi UH 5 Getting Started a pu h SEERE rete dns 7 Requirements a anan E aaa nere one 7 Supported Programming Software sese 8 Hardware Description 9 LED St at s S a UH HORE RU ae Yg 9 Cable Pinouts ss u l l A stre ae e payaa 9 POWet gu pu sie Sai a ed ieee S 10 Signals eta eens naa e PE 11 Programming tiere USA HE RI PURSE 13 SPI Programming s ene ennen 13 JTAG Programming n a a uu uY 14 Programming Software sese 15 Troubleshooting ie rE eoe repe rtr eene 17 Appendix 1 Fuse Programming cece seen 19 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 e Two programming interfaces SPI JTAG e Fast programming with JTAG e Fast programming with auto adapting SPI clock STK500 compatible programmer compa2. Port USB to RS232 adapters are supported Getting Started Supported Programming Software AVR Studio 3 x AVR Studio 4 x STK500 exe installed HEC ume eon with AVR Studio Imagecraft AVR 2 http www imagecraft com Compiler Codevision AVR Compiler http www hpinfotech ro ChipBlasterA VR AVRDUDE http savannah nongnu org projects avrdude http winavr sourceforge net SP Duo User Manual Hardware Description LED Status LED Color Status Solid Green Programmer powered and Idle Pulsing green and red Connected to target target in programming mode Intermittent Blinking Red Bootloader fail use update software to reprogram Solid Red while running update software 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 vcc GND GND GND GND TAG TCK GND vcc TMS RESET N C N C TDI GND Top view of programming connectors The square pin is pin 1 red conductor on the cable Hardware Description SPI JTAG Signal Pin Signal Pin VCC VCC GND 6 8 10 GND RESET RESET SCK TCK MISO TDO MOSI No A N TDI Power TMS tS The SP Duo requires a vol
3. 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 14 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
4. 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 15 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 Wtk500 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 16 Troubleshooting The LED is off SP Duo User Manual Power not supplied to target Verify VCC pin is supplied with 3 0V 5 5V from target Can t enter programmi
5. ng mode on target Incorrect pinout Verify pinout SPIEN JTAGEN fuse cleared Program fuse using Parallel Programming Reset pin used as general I O Clear fuse using Parallel Programming Not enough power Verify the target can supply enough power to the programmer Target has no clock SPI only Verify the target is clocked at 250kHz minimum 1MHz minimum for AT90S1200 Programming pins are heavily loaded Use series resistors to separate load from shared programming pins 17 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 8 N 1 Type Ctrl V into the terminal window and the programmer will reply SP Duo vX X if communication is correct 18 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 he
6. rget micro controller directly without any series resistors 12 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 13 Programming it When programming the target s fuses take care to ensure the fuse values are correct See Appendix 1 JTAG Programming The
7. tage 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 10 SP Duo User Manual Signals Common Vcc Power supply to the programmer and the target micro controller must be between 3 0 5 5V Gnd Ground reference Reset 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 vcc TARGET gt 4 7 Reset connection SPI SCK clock signal from programmer MISO data signal from target MOSI data signal from programmer 11 Hardware Description JTAG TCK clock signal from programmer TMS control signal from programmer TDI data signal from programmer TDO data signal from target 2 amp 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 ta
8. tible 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 Introduction Supported AVR Devices using SPI A Tmega8 A Tmegal62 A Tmegal28 ATmegal03 AT90S 1200 AT90S4433 AT90S4414 ATtiny12 ATtiny13 ATmega8515 ATmega32 ATmegal61 9052323 9058515 AT90S4434 ATtiny15 ATtiny2313 ATmega8535 ATmegal69 ATmegal63 AT90S2343 A T9088535 ATtiny26 Supported AVR Devices using JTAG ATmegal6 ATmega64 ATmegal62 ATmegal28 ATmega32 ATmega323 ATmegal6 ATmega64 ATmega323 AT90S82313 AT90S2333 ATtiny22 ATmegal69 Note all low voltage counterparts are supported e g ATmega8L or A T90LS8535 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 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 IMHz System Requirements 115 200 baud RS 232 COM
9. xadecimal 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 e Programming enable fuses SPIEN for SPI and JTAGEN for JTAG e 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 e Reset Disable if the reset line is set as a general I O pin SPI programming will not work 19
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