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PDVS2mini FIRMWARE UPGRADE (ATMEL AVR DRAGON) 

An alternative method of updating the firmware is by using an Atmel AVR Dragon. 

 

Launch Atmel Studio 7 and select TOOLS, DEVICE PROGRAMMING. 

Connect the AVR Dragon to a USB port of your PC. 

On the PDVS2mini bridge J1 (this selects 3.3V for ICSP). It is bridged by default. 

On PDVS2mini (fresh batteries only, do NOT use DC power) fit a jumper to JP1 power bypass, the 
PDVS2mini will power up. 

Connect an ISP cable (6-way both ends type) from the PDVS2mini ICSP header to the AVR Dragon ISP 
header (note orientation and pin1). 

On Atmel Studio Select AVR DRAGON, ATm

ega1284, ISP……then hit APPLY. 

The PDVS2mini will be interrogated, you should see the programming voltage report 3.3Vdc and if you 
select FUSES you should see the sett

ings populate, hit LOCK BITS you should see the same…….don't 

touch anything, this is just proving the PDVS2mini is being interrogated live. 

Go to MEMORIES and under FLASH select the HEX file, press PROGRAM. You should see the Erase, 
Program and then Verify cycles. This should take about 40secs total. 

When finished unplug the PDVS2mini and remove JP1 power bypass. 

 

 

 

Summary of Contents for PDVS2mini

Page 1: ...Model PDVS2mini A multitude of uses as a calibrator reference and fully adjustable precision voltage source Handmade in Great Britain by Ian Johnston Manual Version 1 0 19 10 19 Ian Johnston Engineer...

Page 2: ...FIRMWARE UPGRADE 9 10 WINDOWS PC APPLICATION 11 HARDWARE 12 FREQUENTLY ASKED QUESTIONS 13 PRODUCT DISCLAIMER WARRANTY 14 CE CERTIFICATE DECLARATION 15 CALIBRATION RECORD BLANK 16 The screenshots phot...

Page 3: ...oltage reference Uses an LM399AH 0 5 1 ppm degC temperature coefficient 0 00000 Vdc to 10 00000 Vdc in 10 uV 0 00001 Vdc steps Load 3kohm minimum Example At 10Vdc output with 3kohm load 3 3mA whilst m...

Page 4: ...is the batteries The best performance of the unit is when the batteries are being used to supply power without any external power External DC input cable wiring Red Blk The battery terminals and the e...

Page 5: ...n off charging via the SETTINGS menu Without this you may get OVER on the display Please observe the minimum external DC supply voltage NOTES When running with batteries and also an external DC input...

Page 6: ...l Best Stability For the most accurate and stable output it is highly recommended to run the unit from the batteries with no external DC power input This helps avoids any ground loop noise entering th...

Page 7: ...col BAUD 250k N 8 1 Rate Data from PDVS2mini to PC is sent every 100mS Format to PC VR0 0 12345 Format from PC KeyVoltage 0 1 23456 The following details all the data being sent from the PDVS2mini and...

Page 8: ...imum current should be approx 250mA so the default setting here of 400mA gives some margin Charge Full mA Current mA at which the battery is determined to be near full The charging circuit is self con...

Page 9: ...10 00000 XXXXXXX Counts for 10 00000Vdc output Out Vdc XX X XXXX Output monitor counts Calibration of the output DC voltage monitor Batt DC Vdc XX X XXXX Battery Ext power supply Vdc Span counts Cali...

Page 10: ...le co uk avrdudess a gui for avrdude A HEX file will be supplied for the upgrade The current calibration settings will not be overwritten but it is advisable to have them written down Please refer to...

Page 11: ...oth ends type from the PDVS2mini ICSP header to the AVR Dragon ISP header note orientation and pin1 On Atmel Studio Select AVR DRAGON ATmega1284 ISP then hit APPLY The PDVS2mini will be interrogated y...

Page 12: ...PC then double click on SETUP EXE Follow the on screen prompts to install the app If the app install fails then see below Turn on COMMS on the PDVS2mini by holding down the LEFT RIGHT buttons Start th...

Page 13: ...e Pcb printed circuit board FUSE 1 1A time delay fuse Schurter UMZ 250 series J1 3 3Vdc supply to ICSP header Default shorted ICSP In Circuit Serial Programming header used for uploading new firmware...

Page 14: ...d charge them separately in a standalone charger This will match them again and you can return them to the PDVS2mini If this problem persists then you may have a faulty weak battery Q Can I run the PD...

Page 15: ...product may directly threaten life or injury The user of Ian Johnston Engineering Ltd products in life support aircraft applications or other such critical activities assumes all risks of such use an...

Page 16: ...15...

Page 17: ...00 4 00000 5 00000 6 00000 7 00000 8 00000 9 00000 10 00000 FUNCTION COUNTS Out Vdc Batt Vdc Charge mA Batt Low Shutdown Charge Enable Charge Overload mA Charge Full mA TEST Serial Comms Soak Test Dur...

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