2011/3/31 Werner Almesberger <[email protected]>: > David Reyes Samblas Martinez wrote: >> Werner it should be not better to program bootloader and firmware at >> once, from the atusb-pgm , instead of having to flash and then upload >> firmware? > > You can do that, but it will take about 8 times as long with the > current avrdude, and still twice as long if we change avrdude to > "perfecly" optimize the upload. (1) > > Flashing 4 kB via DFU takes maybe 1-2 seconds, as opposed to ~15 s > with avrdude. You need to connect it to a PC for testing anyway, > so if you flashed everything in one go, you'd just spend something > like an extra hour ((2), best-case) pushing pogo pins, plus > someone else would have to spend a day or so teaching avrdude > better table manners. > > (1) The original avrdude flashes from address 0 to the highest > address used. With my skip-low-addr.patch, it flashes from > the lowest to the highest address used. Application and boot > loader are both around 4 kB and live at opposite extremes of > the 32 kB Flash. > > (2) Calculating 135 units, 90% yield, 70% success ratio for > Flashing (you'll not hit the pads or slip off every so often) > 15 seconds each would be 43 minutes. As you grow bored and/or > annoyed, your failure rate will go up ... I have an idea to enhance your atusb-prg, improving the atusb end with a clamp , to not need to maintain my hand occupied holding the cable. this should be enough , also I want to separate process, flashing from testing, to do one process at time. for the first ~100 units batch, one nanonote would be enough and 15s isn't enormous amount of time and , unplug plug to a pc flash, and change to test will also consume some seconds. but if the flashing and testing are separated, one person can flash meanwhile other is testing already flashed .
Also if all flashing is done in one step , and the demand requires more prodution ratios, I have in mind to do a "flashing machine" with bare NN boards(Wolfgang please quote me 40 of this, please to have an idea of costs) (minimum as many as atusbs in a panel (30-40)with a powered usbhub mess and atusb-prg cables inside :P ,all NN with a diferent IP and a script on a pc sshing comands to those NN to flash in paralles all atusbs of the panel) so 30-40 in 15s is also a good ratio for me :), So please let me insist in showme the way to flash bootloader and program at once even with actual avr-dude (also usefull for me to be able to flash arduino sketches with arduino bootloader ) and make me happy ... please[1] [1]http://3.bp.blogspot.com/_tetAl-ZL_ig/TAwKgihmiRI/AAAAAAAAALQ/7ZlwJ1WG49w/s1600/lgfp1425%2Bpuss-in-boots-sad-eyes-shrek-2-poster.jpg > - Werner > > _______________________________________________ > Qi Hardware Discussion List > Mail to list (members only): [email protected] > Subscribe or Unsubscribe: > http://lists.en.qi-hardware.com/mailman/listinfo/discussion > -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable & embedded solutions Ben NanoNote, Arduino, Openmoko Hey, watch out!!! There's a linux in your pocket!!! _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
