Got myself a blue pill
So the best way to figure out whether running on a blue pill is turning on GPIOC12 (Led port of Olimex and other HW revisions) and then read it back. Since the port does not exist on the C8 it reads back as 0.
I also checked the FLASH_SIZE register and its actually 0x80 = 128k flash
Finally I found out that TIM4 actually runs, it is just not connected to any pins. So theoretically it would be possible to restore the over current reference pins using TIM2 and doing the scheduling with TIM4.
Well , the only pcb I have done so far for the blue pill is the little gen 2 prius board which i can just hack up my own version to run in a pinch. So i guess it makes sense to bring that feature back if possible.
yaroslav wrote: ↑Tue Aug 27, 2019 7:41 pm
Good evening, I would like to ask if a single-channel encoder will work on it? What is the exciter pin used for?
Single channel not yet but I think it can be restored.
Exciter pin generates a square wave in resolver mode that is turned into a sine wave by a 3-pole low pass filter and then amplified by an audio amplifier. With that the resolvers primary winding is excited, see wikipedia why this is needed.
Is it actually possible to run a tesla motor with the blue pill?
A have a handfull of those here at home.
Any opinions are my own, unless stated otherwise. I take no responsibility if you follow my way of doing things and it doesn't work. Please double check with someone who knows what they are doing.
yaroslav wrote: ↑Sat Aug 31, 2019 4:35 pm
Good evening, I collected on such a Board inverter for the test, but there was a mistake DESAT what are the conditions for its appearance?
Are you getting the desat error flagged every time you try start your dev board? You need to pull the fault line low, I believe the same line is used for a few different faults.
A number of the Blue Pills for sale on eBay only have the 64k processor, so you won’t be able to save your parameters unless you change the start of the eeprom block.
0x8001fc00 -> 0x800fc00, basically replace the 1 with a zero.
The current firmware is about 38k, so will easily fit inside the smaller memory.
yaroslav wrote: ↑Sat Aug 31, 2019 4:35 pm
Good evening, I collected on such a Board inverter for the test, but there was a mistake DESAT what are the conditions for its appearance?
Are you getting the desat error flagged every time you try start your dev board? You need to pull the fault line low, I believe the same line is used for a few different faults.
I think I found the cause, you need to pin pb12 to apply logical unit, as in previous schemes was 0, as then to implement the current protection?
I'm having a little play with my newly arrived Blue Pill, I've moved the little jumper across and run ./stm32flash -r ~/open-inverter/tumanako-inverter-fw-bootloader/stm32_loader.hex /dev/tty.wchusbserial1410
Is there any way of checking this has flashed the inverter fw bootloader as expected?
VW Beetle 2003
Outlander front generator
Prius Gen 3 inverter (EVBMW logic board)
Outlander charger
3x Golf GTE batteries
Chademo Charging
Outlander water heater
if you don't get any errors reported it's almost certainly worked. You could add the -v argument for stm32flash to get it to verify.
Have you tried flashing a simple blink program that just blinks the LED on the board? that would also prove that flashing works.
I've used one of the cheap st-link clones and st-flash which works well and gives a whole heap of useful output when I've played with the blue pill in the past.
To use the serial bootloader you need to set a jumper on top of the board which pulls a pin up to 3.3V. This isn't pin isn't broken out to the pin headers along the sides, so yes you could use that, but you can't pull the pin up easily from an external source.
I hate to be a party pooper, but is it a good idea to save a few bucks on the ECU?
I definitely prefer a proprietary and fully populated board, with all the necessary pins broken out.
Without some low cost plugin boards.
The cost for making custom boards are not very high now a days.
Thomas A. Edison “I have not failed. I've just found 10,000 ways that won't work"
Well the current kit uses the same technique just with an Olimex board. I mean the Blue pill is just an STM32 with its pins broken out. I think it is more DIY friendly to solder a few through hole components than it is to solder an SMD board. If you just want to have a play things are not that serious either.
When it comes to fully populated boards of course SMD is the better option.
