TSDZ2 mid drive with 860C, 850C or SW102 displays only -- Flexible OpenSource firmware (Casainho code only)
- Thread starter casainho
- Start date
bruwie
1 mW
Target Chip eraseperryscope said:
Load bin file
Target program
After flash
perryscope
100 W
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bruwie said:
Yes those are the steps I followed but it looks like my 850C is only 256K bytes? I wonder if that's the difference?
fi7ippo said:Hi Buba I saw the 0.20.0 wiki, wonderful, You have make a epic job
Is it safe to compile and test?
Wow, thank you! Appreciate it!
I advice against testing it for now. Especially when I am so close to have a version that can be tested by all users. Would love your feedback when it is ready!
In my earlier versions I could change motor parameters during trips, directly from the LCD. I did this to test the limits of the system. One of many tests I wanted to do was to stress the blue gear bearings until they were totally destroyed. Did many, many startup tests and different checks. I was very successful in destroying the bearings in the blue gear. I do this so you do not have to. :wink: The version on my fork is far safer and close to finished but I still advice to wait.
I apologize for taking so long.
fi7ippo said:
We create a 16 bit unsigned integer called ui16_temp. It is a temporary variable where we store the 10 bit value of the torque sensor ADC.
Then that variable is passed to a function that filters the value and stores it in another variable called ui16_adc_pedal_torque_offset. The number "9" is the amount of filtering that is supposed to be done in the filter.
The variable, ui16_adc_pedal_torque_offset, is actually the resting torque value we have discussed previously in the thread.
Let me know if you want to know more or are curious of anything!
fi7ippo said:
Basically:
Torque Assist = We look at the torque sensor value and convert that to a motor torque value. The harder we press the pedals the more torque we get from the motor. It is a linear correlation assuming your torque sensor is linear in the range you are riding. This works very similarly to the original firmware.
PAS/Cadence Assist = This is actually the standard riding mode on most electric bikes. Most electric bikes can only senses crank rotation. When the system senses crank rotation it will engage the motor so as to assist the user.
eMTB = This is a dynamic riding mode that works much like torque assist. But it adjusts the assist factor depending on the amount of torque applied and the wheel speed. You need more assistance when going faster and this is not linear. So this is why eMTB is dynamic and changes depending on circumstances.
fi7ippo said:
It is difficult to explain but when using the torque sensor it has a natural time delay. This gives enough of a power ramp up that we only need to configure the possible available power and the rate of change of that possible power. I have tested this so much in many different versions it has resulted in a better current controller/ torque controller. Not PI yet but maybe in the future IF it is necessary. Anyway, the result is a very natural feeling and the system has become very responsive.
fi7ippo said:
I like it too! It is so simple and will be perfect for users that want to calibrate the torque sensor so the system can calculate the human power more accurately. Can also be used to check the accuracy, precision and range of the torque sensor. It is more natural and easier to understand and we instinctively have a feeling if something is not right or non-linear just by looking at the weight value.
Just measure with a scale or use some weights and you are set. Adjust until you are happy! Glad you liked it!
fi7ippo said:
Yes, that seems to be very common. Most of the torque sensors start out with values around 30-40 when new. Nice of you to provide that data and information! This is exactly why this community is so great!
Thank you, fi7ippo!
thineight said:fi7ippo said:Hi Buba I saw the 0.20.0 wiki, wonderful, You have make a epic job
Where is the 0.20 wiki? I'm curious to have a look at it in the meantime... :wink:
Thanks
The super secret 0.20.0 wiki is far from finished but it is linked below :wink:
https://github.com/OpenSource-EBike-firmware/TSDZ2_wiki/wiki/0.20.0
Hi,
Can I buy the display at PSWPOWER, on Aliexpress?
Full colorful LCD P850C display.
At this link:
https://www.aliexpress.com/item/32664961322.html?spm=a2g0o.cart.0.0.7bf33c00QCUMa1
Many thanks,
Azur
Can I buy the display at PSWPOWER, on Aliexpress?
Full colorful LCD P850C display.
At this link:
https://www.aliexpress.com/item/32664961322.html?spm=a2g0o.cart.0.0.7bf33c00QCUMa1
Many thanks,
Azur
casainho
10 GW
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- Feb 14, 2011
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- 6,045
Please take a picture of the microcontroller to make sure it is another version from the ones I have, see here a picture showing:perryscope said:
https://github.com/OpenSource-EBike-firmware/Color_LCD/wiki/Bafang-color-LCD-850C
GD32F103RET6
This is a 32 bits ARM Cortex M3 that should be very similar to STM32F103.
GD32F103RET6 main characteristics:
Maximum Speed Up to 108MHz
Flash Memory: 512K
RAM: 64K
Package: LQFP64
I've downloaded the proper software and files and exposed the programming pads. The pads are quite a bit narrower than the LCD-3 connectors. Are you soldering pins to the pads or just bending programming pins from the st link five wire into a narrower width? I was thinking to cut the corner out and hotglue pins to pads -- so that future flashing can be done without opening the case.
Wonderful work and thanks to all of the programmers.
Wonderful work and thanks to all of the programmers.
perryscope
100 W
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casainho said:
Looks to be a different PCB layout compared to your photo, and unfortunately there is something on the chip obscuring some of the lettering. This is an existing photo I had so i will take it apart later and try to remove the mark, I think its just black marker.
casainho
10 GW
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That board uses the STM32F103RCT6, which has only 256 kbytes of flash memory (half of the GD32F103RET6perryscope said:
, that has 512 kbytes). Also STM32F103RCT6 runs at 72MHZ max frequency while GD32F103RET6 runs at max of 108MHz.
I think your LCD will not work. Can you please take more pictures of the case, reference, name on internet or such so we should avoid users buying that version??
I bought this from PSWPower (http://www.pswpower.com/ven.php?cargo.2016-5e-2eaj), can your please compare with the one you bought? can you share the link for the shop?
perryscope
100 W
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casainho said:
I thought that may be the case. I did get this screen 2nd hand some time ago (dec 2018) as a spare for my BBS-02 setup so the original seller is unknown unfortunately, but I have tried to contact them in case that can share where they purchased it from. My guess is its an earlier version but it was described as a 'Bafang (Luna) 850C (DPC-14) Advanced colour display with USB' and it did indeed have the Luna Bafang firmware on, so I suspect it came from Luna Cycles originally.
Here is a photo of the case that may help other users avoid it.
DP C14.UART
DPC14L0100021
V5.2 1609060400
Anyone know how to upload the original bafang firmware back on it
casainho
10 GW
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Ok, nice to know it is a DPC14, I will put a warning on wiki about that model, saying it does not work.perryscope said:I thought that may be the case. I did get this screen 2nd hand some time ago (dec 2018) as a spare for my BBS-02 setup so the original seller is unknown unfortunately, but I have tried to contact them in case that can share where they purchased it from. My guess is its an earlier version but it was described as a 'Bafang (Luna) 850C (DPC-14) Advanced colour display with USB' and it did indeed have the Luna Bafang firmware on, so I suspect it came from Luna Cycles originally.
Here is a photo of the case that may help other users avoid it.
IMG_20181231_174301.jpg
DP C14.UART
DPC14L0100021
V5.2 1609060400
Anyone know how to upload the original bafang firmware back on it
I would say there is no way to put the original firmware back as at least if it works as 850C, it has encrypted bootloader that you erased and I guess no one has that bootloader unless the manufacturer. The original firmware "is locked" on purpose so no one can do a backup and flash again.
beardydave
10 µW
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- Jul 15, 2019
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- 6
Hi! Sorry if this is the wrong place for this.
I have been very happily running v17 of the software for a while now (36v, PAS only) but recently started having issues where power reduces then goes to 0, whilst the centigrade 'c' in the bottom right hand corner of the display blinks. The display still shows torque inputs, but 0 motor watts. Seems to happen when battery is roughly half spent with about 36.5v left. Disconnecting and reconnecting the battery doesn't help, charging the battery does. Any ideas what might be going on?!
Thanks in advance!
I have been very happily running v17 of the software for a while now (36v, PAS only) but recently started having issues where power reduces then goes to 0, whilst the centigrade 'c' in the bottom right hand corner of the display blinks. The display still shows torque inputs, but 0 motor watts. Seems to happen when battery is roughly half spent with about 36.5v left. Disconnecting and reconnecting the battery doesn't help, charging the battery does. Any ideas what might be going on?!
Thanks in advance!
andrea_104kg
1 kW
- Joined
- Mar 5, 2018
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- 344
I would like to buy a Teflon sheet to put in the torque sensor, what thickness does it take for you? 0.5 mm is too little?
bruwie
1 mW
Hello,
I solved it this way.
The five-pole Bafang plug now goes to the JTAG.
Unfortunately I already sealed the display with silicone, otherwise I would have taken more pictures from the inside. Unfortunately I forget this again and again.
I drilled a hole for the motor cable.
The adapter should work for many firmware updates.
I solved it this way.
The five-pole Bafang plug now goes to the JTAG.
Unfortunately I already sealed the display with silicone, otherwise I would have taken more pictures from the inside. Unfortunately I forget this again and again.
I drilled a hole for the motor cable.
The adapter should work for many firmware updates.
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