Posts: 994 Threads: 2 Likes Received: 695 in 387 posts Likes Given: 381 Joined: May 2017 Reputation: 14  08-Jan-2018, 02:12 AM (08-Jan-2018, 12:46 AM)unseen Wrote: New hips? At your age?!
You're determined to outlive us all! 
I need new hips now and I'm a very young 52 compared to you. Sadly, all the radiation that they had to fire through my hips to cure my cancer has destroyed the blood supply to my hip joints. I'm quite looking forward to upsetting airport security people when they can't understand why I make their metal detector start beeping. Oh, and not having my hips hurt like hell, particularly when it gets cold.
Happy New Year to you! Unseen!!! Welcome back. We have all missed you. (Ooops I nearly said Old Boy but that is of course not true.) Sorry to hear about your hips and the cause thereof. My left hip is also the result of the blood supply failing. I believe it is called an AVN and mine is probably caused by my not choosing my Father wisely. He had three knee replacements very early in his life. And no, before you al ask, he did not have three legs. I have battled knee problems all my life and it is ironic that I end up in hospital with a hip replacement. My knees come next. And 80 is not old you know. 80 is the new 60. Or so I keep telling myself. Nice to see you again Unseen. Regards, KK Posts: 1,504 Threads: 83 Likes Received: 944 in 654 posts Likes Given: 2,142 Joined: Sep 2016 Reputation: 24 (08-Jan-2018, 02:12 AM)Keyboard Kid Wrote: 80 is the new 60. Or so I keep telling myself. I wish someone could have told that to Margaret Thatcher. The 80's would have been a very different time. Shoulder pads with bell bottoms anyone..? Windless fields and smokeless builds Posts: 994 Threads: 2 Likes Received: 695 in 387 posts Likes Given: 381 Joined: May 2017 Reputation: 14 MISTAKE No 1. I finally have been able to get around to programming the SP F3 and Betaflight suggest that on the SP Racing F3 under ports that UART 3 is the more usual. I have been running UART 1 and so like a good little boy I changed to UART 3, saved and rebotted and now I can no longer communicate with Betaflight. Can anyone suggest how I get myself out of this one? The F3 is all sealed up and taped to Wooden It. I do not want to demount is and re-flash firmware if I can help it. Any ideas?  ..........Please  KK ![[-]](https://intofpv.com/images/collapse.png) • Posts: 994 Threads: 2 Likes Received: 695 in 387 posts Likes Given: 381 Joined: May 2017 Reputation: 14 (07-Jan-2018, 08:29 AM)Keyboard Kid Wrote: Howdy Boys,
I have just come across a copy of the Betaflight Configuration guide and I have printed it out.
Flying is suspended until I have read through this page by page and set the SP F3 up along lines suggested.
I wish I had found this months ago. It is the sort of thing I have been complaining about never finding in the quad world.
So I apologise Betaflight. For any newcomer to quads reading this thread here is the link;
https://www.propwashed.com/betaflight-co...ion-guide/
Well done Betaflight!!  Katylynn, I am sorry I have not got around to welcoming you to the kookiest thread on INTOFPV sooner. I am glad to see that you are really enjoying your quad flying. It really is great fun unless you keep on doing stupid things like myself. But I do really enjoy working with the people on this thread and keeping them all entertained. That is my real job. On this thread you will see posts covering all sorts of topics from Lions and Cheetahs, The Sydney Harbour Bridge and Opera House, my olden day adventures with the occasional reference to things FPV thrown in as an aside. Usually me appealing for some sort of help. So I hope you enjoy your stay with us and join in the fun. Regards, KK • Posts: 2,286 Threads: 38 Likes Received: 1,527 in 995 posts Likes Given: 1,881 Joined: Apr 2016 Reputation: 72 10-Jan-2018, 06:58 PM (This post was last modified: 10-Jan-2018, 06:58 PM by unseen.) (10-Jan-2018, 05:06 AM)Keyboard Kid Wrote: MISTAKE No 1.
I finally have been able to get around to programming the SP F3 and Betaflight suggest that on the SP Racing F3 under ports that UART 3 is the more usual. I have been running UART 1 and so like a good little boy I changed to UART 3, saved and rebotted and now I can no longer communicate with Betaflight.
Can anyone suggest how I get myself out of this one?
The F3 is all sealed up and taped to Wooden It. I do not want to demount is and re-flash firmware if I can help it.
Any ideas? ..........Please
KK That sounds backwards to me. The SP Racing F3 has a CP2102 serial to USB bridge chip which is enabled on UART1. That chip is what is used to talk to your computer when the flight controller is connected to the USB port. UART1 is therefore always the port that should have the MSP protocol assigned to it. If you disable MSP on UART1, the flight controller can't talk to your computer any more and the only way out is to short the BOOT pins and re-flash. • Posts: 2,286 Threads: 38 Likes Received: 1,527 in 995 posts Likes Given: 1,881 Joined: Apr 2016 Reputation: 72 10-Jan-2018, 07:01 PM (This post was last modified: 10-Jan-2018, 07:02 PM by unseen.) (08-Jan-2018, 05:14 AM)Tom BD Bad Wrote: I wish someone could have told that to Margaret Thatcher. The 80's would have been a very different time. Shoulder pads with bell bottoms anyone..? While there are many things you can blame Thatcher for, the fashion of the day is hardly one of them! Just you wait. Fashion runs in circles and the fashion of the 80s will undoubtedly return!  • Posts: 1,504 Threads: 83 Likes Received: 944 in 654 posts Likes Given: 2,142 Joined: Sep 2016 Reputation: 24 Oh hooray! I've missed shell suits, and back then I was too young for my mum to allow me to perm my hair! Windless fields and smokeless builds Posts: 2,286 Threads: 38 Likes Received: 1,527 in 995 posts Likes Given: 1,881 Joined: Apr 2016 Reputation: 72 10-Jan-2018, 11:08 PM (This post was last modified: 10-Jan-2018, 11:08 PM by unseen.) I guess the perm won't be a problem for many of us. You actually need hair to perm!  Posts: 994 Threads: 2 Likes Received: 695 in 387 posts Likes Given: 381 Joined: May 2017 Reputation: 14 (10-Jan-2018, 06:58 PM)unseen Wrote: That sounds backwards to me.
The SP Racing F3 has a CP2102 serial to USB bridge chip which is enabled on UART1. That chip is what is used to talk to your computer when the flight controller is connected to the USB port.
UART1 is therefore always the port that should have the MSP protocol assigned to it. If you disable MSP on UART1, the flight controller can't talk to your computer any more and the only way out is to short the BOOT pins and re-flash. Hi Unseen, Below is the text from the Betaflight guide; "The only thing that needs to be done is enabling the Serial Rx switch on UART2 or UART3. On F1 flight controllers like the Naze32 this will always be UART2. On F3 flight controllers like the SPRacing F3, this will generally be UART3. Don’t forget to click “Save and Reboot” Looking at that text again, have I misunderstood it? I am using a PWM RX (one wire per chnnel). Are the referring to the receiver input only? No doubt about it no matter how careful I try to be I somehow manage to get things upside down or back the front. Anyway I am glad you are back Unseen, even if you do tell me things that I do not want to hear. Regards, KK Posts: 1,504 Threads: 83 Likes Received: 944 in 654 posts Likes Given: 2,142 Joined: Sep 2016 Reputation: 24 Yes this sentence is reference to the RX only.
If you are using PWM you don't need to enable 'serial RX'. This function is basically telling your FC what language your RX is going to use to communicate. Serial RX protocols are newer digital protocols which only use a single wire for signals. Windless fields and smokeless builds Posts: 2,286 Threads: 38 Likes Received: 1,527 in 995 posts Likes Given: 1,881 Joined: Apr 2016 Reputation: 72 Tom has already posted what I was going to say in reply.
On the SP Racing F3, the only thing that should be enabled on UART1 is "MSP". Other than that, leave UART1 alone!
In the Betaflight configurator, you should set "Receiver Mode" to "PWM RX" in the Configuration tab to match with your receiver. This does not use a serial port. Posts: 994 Threads: 2 Likes Received: 695 in 387 posts Likes Given: 381 Joined: May 2017 Reputation: 14 (11-Jan-2018, 03:37 PM)unseen Wrote: Tom has already posted what I was going to say in reply.
On the SP Racing F3, the only thing that should be enabled on UART1 is "MSP". Other than that, leave UART1 alone!
In the Betaflight configurator, you should set "Receiver Mode" to "PWM RX" in the Configuration tab to match with your receiver. This does not use a serial port. Howdy lads, I find this Quad world really confusing at times especially in the way old terms are taken and given new meanings. For example I started work on my first digital proportional system in 1965 and commenced production on Digital proportional syystems at Silvertone in 1966. That system the Silvertone Mark III was a digital proportional system using PPM modulation. PPM being defined as a system of modulation wherein the servo position data was carried in the time between two adjacent pulses. Thus a 6 channel system consisted of 7 200us pulses spaced 1 - 2ms apart followed by a reset pause of approx 14 - 20 ms. This entire process was repeated over and over in what was called the frame rate. I produced those PPM systems for 50 years before I entered the murky world of quads. This system in the quad world is now referred to as a PWM system and PPM refers to I have no idea what. Can somebody please enlighten me as to what PPM stands for in the Quad world? I am very confused but one thing is now clear thanks to my friends on Into FPV, I have to de-mount the SP F3, open it up and re-flash the firmwarm. Have I ever told you I do not like this quad world?  KK • Posts: 1,773 Threads: 30 Likes Received: 1,199 in 755 posts Likes Given: 714 Joined: Oct 2016 Reputation: 45 There's a gentleman on the interwebs who's good at explaining this technical shtuff https://oscarliang.com/pwm-ppm-difference-conversion/ Posts: 994 Threads: 2 Likes Received: 695 in 387 posts Likes Given: 381 Joined: May 2017 Reputation: 14 12-Jan-2018, 03:33 AM (This post was last modified: 12-Jan-2018, 03:37 AM by Keyboard Kid. Edit Reason: Spelling correction ) (12-Jan-2018, 01:01 AM)RENOV8R Wrote: There's a gentleman on the interwebs who's good at explaining this technical shtuff
https://oscarliang.com/pwm-ppm-difference-conversion/ Thanks Reno that certainly explains the quad use of the terms PWM and PPM but they really are a misuse of the term modulation or at the best, the use of a special case definition of standard electronic theory which to conventionally trained electronic people is very confusing. To define the change of state of a DC level as modulation is stretching the definition of the term modulation to a very imaginative limit. I agree that from the point of view of the FC input (in otherwords the RX decoder output) the two signals do contain a width variation and a position variation so I do agree PW and PP are both correct. But modulation? All we are really looking at is a change in state of the DC level and that is stretching the term modulation to its absolute limit, especially when it introduces such a high level of confusion for conventionally trained people used to PPM meaning Pulse Position Modulation of an RF carrier signal. Therefore I would argue that a more accurate terminology would be to replace the "M" with something more suggestive of a DC level shift. At the moment I am hard pressed to think of something really solid but perhaps PWC/PPC (Pulse Width Coding and PPC Pulse Position Coding) or PWV/PPV (Pulse Width Variation and Pulse Position Variation). Perhaps some of you Lads or Ladettes out there in the Quadsphere may have even better suggestions. Or perhaps some of you might like to tell me to go to hell and mind my own business  Either way I think the change worth while. KK • Posts: 2,286 Threads: 38 Likes Received: 1,527 in 995 posts Likes Given: 1,881 Joined: Apr 2016 Reputation: 72 The terminology seems perfectly applicable to me.
Pulse Width Modulation uses the width of a pulse which is varied between 1000 microseconds to 2000 microseconds to convey information on a 0 to 1000 scale.
Pulse Position Modulation uses the time between each of a number of fixed width pulses to convey information on a similar scale.
In both cases, an aspect of a fixed pattern is being varied so that it may carry information and that's a perfectly good definition of 'modulation'. • |
