lorenfb
Posts: 1736
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
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Re: Official Tesla Model S thread

Mon Apr 30, 2018 5:18 pm

jlv wrote: Trying to say the introduction of the MCU2 shows some failing of the OTA process just doesn't make sense to me.


Sorry if you misinterpreted my view. Having the Telsa OTA update function is a great benefit to the consumer just as it's
beneficial for other consumer products, e.g. PCs & cell phones. But just like with those products, there're limitations over
time (as systems evolve), e.g. a minimum required processor/memory, faster USB ports, 4G cellular radios, etc, that can't be OTAed. As an example,
my gen 1 Apple tablet no longer receives OTA updates. Again, the point is that the OTA function is limited, generally requiring
a dealer visit to re-flash (if possible) or a new ECU when the update is extensive or critical to vehicle safety.

Edit: Clarified time.
Last edited by lorenfb on Mon Apr 30, 2018 7:36 pm, edited 1 time in total.
Leaf SL MY 9/13: 64K miles, 49 Ahrs, 5.1 miles/kWh (average), L2 charges to 100% > 1000, max battery temp < 95F, min discharge point > 20 Ahrs

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EVDRIVER
Posts: 6284
Joined: Sat Apr 24, 2010 7:51 am

Re: Official Tesla Model S thread

Mon Apr 30, 2018 5:45 pm

lorenfb wrote:
jlv wrote: Trying to say the introduction of the MCU2 shows some failing of the OTA process just doesn't make sense to me.


Sorry if you misinterpreted my view. Having the Telsa OTA update function is a great benefit to the consumer just as it's
beneficial for other consumer products, e.g. PCs & cell phones. But just like with those products, there're limitations over
time, e.g. a minimum required processor/memory, faster USB ports, 4G cellular radios, etc, that can't be OTAed. As an example,
my gen 1 Apple tablet no longer receives OTA updates. Again, the point is that the OTA function is limited, generally requiring
a dealer visit to re-flash (if possible) or a new ECU when the update is extensive or critical to vehicle safety.


Restrictions? No there are not. Please site devices, examples, specifics. Other than slow downloads on weak cellular (moot) or when no wifi is available what EACTLY are you talking about? You have implied and stated this before yet Tesla can update any device and any level of firmware and would like to know of examples where the car needs to go to the dealer for this except in repair cases. What update failures please?
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jlv
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Re: Official Tesla Model S thread

Tue May 01, 2018 12:32 pm

lorenfb wrote:Again, the point is that the OTA function is limited, generally requiring
a dealer visit to re-flash (if possible) or a new ECU when the update is extensive or critical to vehicle safety.

I still don't see how the introduction of the MCU2 shows that the OTA function is limited.


Nearly 17 years ago I worked on a carrier class PDSN/GGSN - the backend 'router' that gives cell phones internet access. We started out with a few separate boards in a massively parallel system that each had different firmware, FGPA, and microcode images, as well as an operating system image with user-space router that needed to boot on top of this. Most of those images were written to different flash parts accessible by different buses. Updating a board required a lot of technician time - and an early problem was finding boards with one or other image out-of-date. Another engineer and myself designed a scheme to encapsulate all the images into a single boot image, and worked on dynamic update logic to reflash appropriate parts of the system at runtime. Our approach enabled complete dynamic updates on the system, the logical equivalent of Tesla's OTA (there was no "over-the-air" in our system).

At the time we were told it our approach would never work for processor and support chip microcode... but we proved such naysayers wrong by building a working system. When we built the 2nd generation boards using Intel parts (the first generation used Broadcom MIPS-based SOCs), we had our single boot image support all the firmware, FPGA, and microcode images for both generations of board. Cisco still lists a "future-proof architecture" as one of its key selling points.
'13 SL+Prem (mfg 12/13, leased 4/14, bought 5/17) 31K miTesla S 75D (3/17) 20K mi
Model 3 reservation (invited to order 1/18)

Reddy
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Re: Official Tesla Model S thread

Tue May 01, 2018 3:18 pm

jlv wrote:Speaking of the negatives of OTAs:

Last week I got 2018.16 in my S. The unannounced new feature of this release is: they broke the heated steering wheel. :x It just doesn't get warm at all. Many owners reporting this after this update (myself included: https://teslamotorsclub.com/tmc/threads ... 16.113936/). I expect a 2018.16.1 or 2018.17 soon to fix it.
At least they did it in April instead of January. :lol:
Reddy
2011 SL; 9 bar, 45.80 AHr; 45,000 mi; rcv'd Aug 18, 2011
Long: http://www.mynissanleaf.com/viewtopic.p ... al#p226115"
Cold: http://www.mynissanleaf.com/viewtopic.p ... 60#p243033"

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