2018Apr26 14:09:50.860 248) IMG_1205.JPG2018Apr26 14:09:52 meter : Tv:1/1250 Av:7.1 Sv:80 1225:12252018Apr26 14:09:52 actual: Tv:1/2000 Av:4.0 Sv:200 Temp:432018Apr26 14:09:52 AvMin:2.0 NDF:NDin foc:infinity2018Apr26 14:09:55.900 249) IMG_1206.JPG2018Apr26 14:09:57 meter : Tv:1/1250 Av:2.6 Sv:80 1216:12162018Apr26 14:09:57 actual: Tv:1/2000 Av:8.0 Sv:100 Temp:432018Apr26 14:09:57 AvMin:2.0 NDF:NDout foc:infinity
Dear waterwings today I had a problem with this great script I am using from a lot of time with success.
Are you able to write an APP or know who can do for SONY Alpha cameras?
From what I understand (unless I'm not setting something up right) the chdk firmware can't natively read the pwm output from the pixhawk because the pulses are too short.
So I'm trying to set up pulsed output from the relay using some of the logic switches on my taranis rx. It will not be fast acting because the logic switches from the rx can only be as short as 1ds, but could greatly expand controllability of the script in the air. So now that you have my backstory, here's what I'm trying to get it to do.
I'll be utilizing two 3 position switches and one momentary switch from the taranis. < snip > In this mode the trigger should also cause it to begin recording.
QuoteIIRC standard servo PWM output pulse widths run over a range of 1 mSec to 2 mSec. Some time ago, I did some experimenting with the CHDK high precision timer feature in Lua and found that you can almost resolve 10 steps between 1 & 2 mSec. But it's right on the hairy edge of what the camera can do and I would not recommend trying it with anything important.Is the script already set up to do this using the included sample code for pixhawk? I was reading the timing as 5,10,15, and 20 ms. Am i misinterpretung those or maybe this is from an earlier version of the code?QuoteI don't know much about taranis rx units. Do I understand that you are going to ignore your Pixhawk flight controller and hook your camera's CHDK controlled USB port directly to a single relay that is in turn attached to an output from your rx unit? Not exactly. The pixhawk can be set to use a servo output as a digital relay, the relay can then in turn be programmed to activate on a high pwm input from a channel. Also I misspoke, the Taranis is a handheld txQuoteAnd you want to vary the on/off pattern coming from the relay to create a protocal that triggers your CHDK script to do different things? And your rx unit can be programmed somehow to do all of this?Exactly. The taranis has some pretty powerful logic circuitry, including timers and such. I was hoping to alter the code to utilize a combination of pulse counting and pulse widths to put as many functions in as short of time as possible. Of course, if im setting up the pixhawk wrong, a pwm input would be much easier to program and alter code on.QuoteI'm not sure I would set things up exactly this way but there may be constraints on what you can do with your taranis rx unit that I am unaware of. One concern that might make it tricky is making sure the 1d sec shutter trigger pulse does not get mistaken for the 2 or 3 1ds pulses used to switch modes. It can be done but the code gets more complicated.By the way, does 1ds mean 100 mIlliseconds?In any case, you'll want to hack out all the code starting around line 420 where it says ====== PWM USB Pulse Controlled Functions ==========and replace it with your own code. If you are stuck, I could probably give you a quick and dirty version to try out - debugging would be up to you though.Help with either getting the script to work with native pwms or the relay output ive been working on would be awesome. Your script is complicated and i know every piece has a purpose, so even if i knew what i was doing (and i dont) i feel like i would spend more time breaking it then getting it to do what i want.
IIRC standard servo PWM output pulse widths run over a range of 1 mSec to 2 mSec. Some time ago, I did some experimenting with the CHDK high precision timer feature in Lua and found that you can almost resolve 10 steps between 1 & 2 mSec. But it's right on the hairy edge of what the camera can do and I would not recommend trying it with anything important.
I don't know much about taranis rx units. Do I understand that you are going to ignore your Pixhawk flight controller and hook your camera's CHDK controlled USB port directly to a single relay that is in turn attached to an output from your rx unit?
And you want to vary the on/off pattern coming from the relay to create a protocal that triggers your CHDK script to do different things? And your rx unit can be programmed somehow to do all of this?
I'm not sure I would set things up exactly this way but there may be constraints on what you can do with your taranis rx unit that I am unaware of. One concern that might make it tricky is making sure the 1d sec shutter trigger pulse does not get mistaken for the 2 or 3 1ds pulses used to switch modes. It can be done but the code gets more complicated.By the way, does 1ds mean 100 mIlliseconds?In any case, you'll want to hack out all the code starting around line 420 where it says ====== PWM USB Pulse Controlled Functions ==========and replace it with your own code. If you are stuck, I could probably give you a quick and dirty version to try out - debugging would be up to you though.
Is the script already set up to do this using the included sample code for pixhawk? I was reading the timing as 5,10,15, and 20 ms. Am i misinterpretung those or maybe this is from an earlier version of the code?
The pixhawk can be set to use a servo output as a digital relay, the relay can then in turn be programmed to activate on a high pwm input from a channel. Also I misspoke, the Taranis is a handheld tx
Help with either getting the script to work with native pwms or the relay output ive been working on would be awesome. Your script is complicated and i know every piece has a purpose, so even if i knew what i was doing (and i dont) i feel like i would spend more time breaking it then getting it to do what i want.
Also yes, ds for decisecond, so 100ms
I'll be utilizing two 3 position switches and one momentary switch from the taranis. The momentary switch needs to trigger the shutter, regardless of anything else. It's set up now to switch high for 1ds, then off for 6ds.The first switch will output single nonrepeating pulses of 6, 7, and 8ds to cause the script to enter one of three modes. The second switch will output either 2 or 3 1ds pulses high, then 6ds pulse low, repeating until the switch is off.The first mode will be a zoom mode. Switch 2 will zoom in or out dependkng on switch position.The second mode will be exposure correction, switch two will raise or lower the target ev.The third mode will be a recording mode, switch two will set the framerate. In this mode the trigger should also cause it to begin recording.
Started by Jim Completed and Working Scripts
Started by nadavofi « 1 2 » Script Writing
Started by Benny_H88 « 1 2 3 » Script Writing
Started by davefolts Creative Uses of CHDK
Started by GlobalSurvey General Help and Assistance on using CHDK stable releases
