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Old 07-02-2012, 11:40 PM #17
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

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Originally Posted by lasersbee View Post
In my case they are used as a PAUSE....
I sense a fallacy of illicit conversion: "Ellipses are pauses, therefore pauses are ellipses." You pause at your commas, so why not replace all commas with ellipses?

"The ellipsis calls for a slight pause in speech or any other form of text, but it is incorrect to use ellipses solely to indicate a pause in speech."



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Last edited by Cyparagon; 07-03-2012 at 12:17 AM. Reason: correction
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Old 07-03-2012, 01:45 AM #18
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

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In my case they are used as a PAUSE....

Jerry
Uhm.... noted
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Old 07-04-2012, 05:24 PM #19
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

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Also - Trevor, I wouldn't mind tackling some of the mathematics if you don't have the background for it (even though most people good at programming are also brilliant at math).
Well, I feel like it shouldn't be too difficult but help is always welcome!

I haven't had power at my apartment for the last five days because of the storms that rolled through the Appalachians. Once I get power back I'll get a video up.

I also should have more PIC's come in this week...

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Old 07-04-2012, 06:41 PM #20
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

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Well, I feel like it shouldn't be too difficult but help is always welcome!

I haven't had power at my apartment for the last five days because of the storms that rolled through the Appalachians. Once I get power back I'll get a video up.

I also should have more PIC's come in this week...

Trevor
Those storms were crazy! I am lucky enough to be away from home through it all but there are still plenty of people without power where I live.

I was driving through VA after and most gas stations were closed! If you did find an open station you had to wait in huge lines to get to a pump.
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Old 07-05-2012, 12:21 AM #21
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

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Originally Posted by Wolfman29 View Post
Indeed. And every laser would essentially have the exact same type of function, and it should be easily solvable given a few good results at various times. It's a simple second order differential equation, methinks.
In theory its quite simple indeed - as soon as you shine a laser onto the sensor the readings over time will form a series that ends in a asymptote, and this can be predicted long before the sensor reaches that value. Practical implementation is another matter though. Especially green lasers will vary in output, throwing off the prediction mechanism.

I would suggest implementing it though, preferably with some indication on the display if the value is a prediction or an actual sensor reading (blink in the first case or something). I think the original laserbee firmware does predictive analysis as well, though i'm unsure to what degree.

As for the range and the DAC: Just leave it be then. If its limited to a maximum reading of 3800 or so, increasing that to the full 4095 adds so little range its not worthwhile to mess with - and i suppose its also close to the point where larger power levels could damage the sensors coating etc.
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Old 07-05-2012, 12:33 AM #22
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

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I think the original laserbee firmware does predictive analysis as well, though i'm unsure to what degree.
Based on the response time I see with Ellipsis vs. the real firmware, I don't think it does at all.

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Old 07-25-2012, 03:12 PM #23
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

My 1D is coming today, so I should have video soon.

Relevantly, any tutorial information on how to write firmware for the LaserBee is available upon request.

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Old 07-26-2012, 01:55 PM #24
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

Well done Trevor! I'm eager to see how this will work! +1
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Old 11-11-2012, 04:17 PM #25
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

Despite all appearances to the contrary, this isn't dead. I've been a bit busy - by the end of today I will have shot about 13,000 photos at five sporting events over the course of the last four days. And I eat and sleep and do schoolwork sometimes too.

That being said, I'm quite proud of what I've done here. From my redesign, it seems like a lot of things in the original firmware were written downright improperly. I obviously have no way to tell since there's no way to pull the firmware off the chip (and it would be illegal to do so) - but based on performance, it's pretty obvious.

There's one remaining major chunk to get through before I want to post a video comparison of the old and new firmware, but I'm hoping I can get that done soon.

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Old 11-11-2012, 07:20 PM #26
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

Sounds great Trevor, I can't wait
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Old 11-12-2012, 11:51 PM #27
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

Cool,

I'd love to see a shootout between the stock firmware and the one you have cooked up.

I suppose performance enhancement due to custom firmware isn't that crazy though, as it seems to work on numerous android telephones too, but those are a lot more complex and know more trade offs.

Surely i'm curious to see if you came up with a prediction algorithm that shows something near the proper power level much faster than the original does.
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Old 11-13-2012, 06:21 AM #28
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

I've learned some coding in the meantime.

Need any help?
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Old 11-13-2012, 05:00 PM #29
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

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Originally Posted by Benm View Post
Cool,

I'd love to see a shootout between the stock firmware and the one you have cooked up.

I suppose performance enhancement due to custom firmware isn't that crazy though, as it seems to work on numerous android telephones too, but those are a lot more complex and know more trade offs.

Surely i'm curious to see if you came up with a prediction algorithm that shows something near the proper power level much faster than the original does.
Yep - I'll post a comparison between the two.

The wonderful bit about custom firmware on this particular platform is the fact that there was so much unused processing power, even on a relatively low power chip.

A few things I've done:
  • Properly initialized the LCD
  • Better formatting of the LCD
  • User setting for backlight
  • User setting for whether or not to display the splash screen on startup
  • Automatic calibration for first-time meter calibration
  • Manual calibration if a user wishes to use the calibration constant set in their original firmware

I haven't done any sort of predictive work, because I have not made the curve adjustment that is required to account for nonlinearity of the TEC. Once I get that taken care of, I think speeding up the response time is a good next step.

All that's left to do before I'd say I have a workable beta build would be serial output and EEPROM saving of settings. EEPROM will get done today... serial, I'm not sure about. I'll need to write some Arduino code for the purpose of testing the serial output since I currently lack a computer with an RS232 port.

Curiously, Jerry chose not to use the built-in USART module of the chip. So, serial needs to be bit banged. Not a problem at all... just an interesting thing I noticed.

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I've learned some coding in the meantime.

Need any help?
I think I'm good for the moment, but thanks!

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Old 11-13-2012, 05:19 PM #30
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

I like that you've added a setting for removing the splash screen, when I forgot to turn on the meter and have my laser on the sensor already it's annoying to wait 5s for the splash screen to go away before I get a power reading.

The backlight setting will be handy too, when it's on it's to bright for the camera to pick up well, but when it's off it's so dark for the camera to pick up well.

Can't wait to see the final product.
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Old 11-13-2012, 05:26 PM #31
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

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I like that you've added a setting for removing the splash screen, when I forgot to turn on the meter and have my laser on the sensor already it's annoying to wait 5s for the splash screen to go away before I get a power reading.

The backlight setting will be handy too, when it's on it's to bright for the camera to pick up well, but when it's off it's so dark for the camera to pick up well.

Can't wait to see the final product.
...unfortunately the backlight setting is on/off. For some unknown reason, Jerry did not use a pin for the backlight that supports PWM. So that leaves us with the binary option.

Additionally, I tried to set up that functionality using timers, but the necessary interrupt frequency would have crippled the hardware and tended to muck about with the LCD communication.

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Old 11-13-2012, 11:57 PM #32
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Default Re: Ellipsis LaserBee Firmware - Development updates, build notes, media, and more!

I suppose that would a matter to dissolve somehwere at the very end, probably requiring some hardware modification such as adding a resistor between two pins to provide a high/low/off setting, or re-routing/bridging some pins as to connect it to a hardware-pwm capable output.

As for reprogramming: isn't it possible to use a ICSP clamp connector to reprogram the uC using any USB powered programmer?
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