Bafang M500/M600 thread
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casainho
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It may work as M365 motor controller, see:CiDi said:casainho said:Updated the EasyDIY display schematic.
The CTRL pin is put to GND when pressing the power button on the remote. Then there is a voltage divider with 2 resistors, to change the battery voltage to max of 3.3V (including a 3.3V zener diode as a protection) to avoid that signal to go over 3.3V, that is the limit of the microcontroller pin. The microcontroller will then read the power button state by reading the voltage with an ADC.
I would like to get feedback, does anyone things this is wrong? or suggestions for improving??
From what I could see, the P+ terminal that you call ctrl, is the same that is used to power the display, its voltate never drops below 2,2V.
The VCC terminal, has voltage only after switching on and I think it serves to power the usb socket.
VBat pin will only have battery voltage when the motor controller is enabled, and that way everything can be powered from that wire.
And the CAN logs messages you record for power on and por off, make all sense!!
For power on, we see display start sending the first commnds and only after a while, the motor controller sends the first commands (it may take a while to boot, as it may make some own checks).
Tomblarom
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I measured. Four times now and I'm 100% that the finding are correct and occouring on both versions. See the colors for reference:
Code:
B8-F -- B3-F
3 [ylw] -- [blk] 1
8 [grn] -- [blu] 2
2 [red] -- [red] 3
B8-F -- B5-F
6 [org] -- [org] 1
3 [ylw] -- [wht] 2
7 [brw] -- [brw] 3
8 [grn] -- [grn] 4
5 [blk] -- [blk] 5Tomblarom said:I measured. Four times now and I'm 100% that the finding are correct and occouring on both versions. See the colors for reference:
Code:B8-F -- B3-F 3 [ylw] -- [blk] 1 8 [grn] -- [blu] 2 2 [red] -- [red] 3 B8-F -- B5-F 6 [org] -- [org] 1 3 [ylw] -- [wht] 2 7 [brw] -- [brw] 3 8 [grn] -- [grn] 4 5 [blk] -- [blk] 5
Now it seems correct to me.
Pins of the throttle?
Code:
B8-F -- B3-F
3 [ylw] -- [blk] 1 -- CL
8 [grn] -- [blu] 2 -- CH
2 [red] -- [red] 3 -- 5V
B8-F -- B5-F
6 [org] -- [org] 1 -- VCC
3 [ylw] -- [wht] 2 -- CL
7 [brw] -- [brw] 3 -- P+
8 [grn] -- [grn] 4 -- CH
5 [blk] -- [blk] 5 -- GNDGood work on the [display!] side. I have a second M600 controller on order and supposedly in the mail for delivery next week, so hopefully I can use it to track down some of the SoC pins. If it helps, I will start a master list below and fill in the M600 functions as I find them.
Code:
S32K142_64 LQFP Pin IO's
========================
Pin Name Composite Pin Name DEFAULT M600 Funct. .
=== ==== ================== ======== ===========
1 PTD1 PTD1/FTM0_CH3/LPSPI1_SIN/FTM2_CH1/FXIO_D1/TRGMUX_OUT2 DISABLED
2 PTD0 PTD0/FTM0_CH2/LPSPI1_SCK/FTM2_CH0/FXIO_D0/TRGMUX_OUT1 DISABLED
3 PTE11 PTE11/LPTMR0_ALT1/FTM2_CH5/FXIO_D5/TRGMUX_OUT5 DISABLED
4 PTE10 PTE10/CLKOUT/FTM2_CH4/FXIO_D4/TRGMUX_OUT4 DISABLED
5 PTE5 PTE5/TCLK2/FTM2_QD_PHA/FTM2_CH3/CAN0_TX/FXIO_D7/EWM_IN DISABLED
6 PTE4 PTE4/FTM2_QD_PHB/FTM2_CH2/CAN0_RX/FXIO_D6/EWM_OUT_b DISABLED
7 VDD VDD VDD VDD
8 VDDA VDDA VDDA VDDA
9 VREFH VREFH VREFH VHREF
10 VSS VSS VSS VSS
11 PTB7 PTB7/LPI2C0_SCL/EXTAL EXTAL EXTAL
12 PTB6 PTB6/LPI2C0_SDA/XTAL XTAL XTAL
13 PTE3 PTE3/FTM0_FLT0/FTM2_FLT0/TRGMUX_IN6/CMP0_OUT DISABLED L Drive 1 (6287 Pin 4)
14 PTD16 PTD16/FTM0_CH1/LPSPI0_SIN/CMP0_RRT DISABLED
15 PTD15 PTD15/FTM0_CH0/LPSPI0_SCK DISABLED H Drive 1 (6287 Pin 1)
16 PTE9 PTE9/FTM0_CH7 DISABLED L Drive 3 (6287 Pin 6)
17 PTE8 PTE8/FTM0_CH6/CMP0_IN3 CMP0_IN3 H Drive 3 (6287 Pin 3)
18 PTB5 PTB5/FTM0_CH5/LPSPI0_PCS1/LPSPI0_PCS0/CLKOUT/TRGMUX_IN0 DISABLED L Drive 2 (6287 Pin 5)
19 PTB4 PTB4/FTM0_CH4/LPSPI0_SOUT/TRGMUX_IN1 DISABLED H Drive 2 (6287 Pin 2)
20 PTC3 PTC3/FTM0_CH3/CAN0_TX/LPUART0_TX/ADC0_SE11/CMP0_IN4 ADC0_SE11/CMP0_IN4 CAN Tx (1042 Pin 1)
21 PTC2 PTC2/FTM0_CH2/CAN0_RX/LPUART0_RX/ADC0_SE10/CMP0_IN5 ADC0_SE10/CMP0_IN5 CAN Rx (1042 Pin 4)
22 PTD7 PTD7/FTM2_FLT3/CMP0_IN6 CMP0_IN6
23 PTD6 PTD6/FTM2_FLT2/CMP0_IN7 CMP0_IN7
24 PTD5 PTD5/FTM2_CH3/LPTMR0_ALT2/FTM2_FLT1/TRGMUX_IN7 DISABLED
25 PTC1 PTC1/FTM0_CH1/FTM1_CH7/ADC0_SE9 ADC0_SE9
26 PTC0 PTC0/FTM0_CH0/FTM1_CH6/ADC0_SE8 ADC0_SE8
27 PTC17 PTC17/FTM1_FLT3/ADC0_SE15 ADC0_SE15
28 PTC16 PTC16/FTM1_FLT2/ADC0_SE14 ADC0_SE14
29 PTC15 PTC15/FTM1_CH3/TRGMUX_IN8/ADC0_SE13 ADC0_SE13
30 PTC14 PTC14/FTM1_CH2/TRGMUX_IN9/ADC0_SE12 ADC0_SE12
31 PTB3 PTB3/FTM1_CH1/LPSPI0_SIN/FTM1_QD_PHA/TRGMUX_IN2/ADC0_SE7 ADC0_SE7
32 PTB2 PTB2/FTM1_CH0/LPSPI0_SCK/FTM1_QD_PHB/TRGMUX_IN3/ADC0_SE6 ADC0_SE6 Status LED +V
33 PTB1 PTB1/LPUART0_TX/LPSPI0_SOUT/TCLK0/CAN0_TX/ADC0_SE5/ADC1_SE15 ADC0_SE5/ADC1_SE15 6834 OpAmp Out B (Pin 7)
34 PTB0 PTB0/LPUART0_RX/LPSPI0_PCS0/LPTMR0_ALT3/CAN0_RX/ADC0_SE4/ADC1_SE14 ADC0_SE4/ADC1_SE14 6834 OpAmp Out A (Pin 1)
35 PTC9 PTC9/LPUART1_TX/FTM1_FLT1/LPUART0_RTS DISABLED
36 PTC8 PTC8/LPUART1_RX/FTM1_FLT0/LPUART0_CTS DISABLED
37 PTA7 PTA7/FTM0_FLT2/RTC_CLKIN/LPUART1_RTS/ADC0_SE3 ADC0_SE3
38 PTA6 PTA6/FTM0_FLT1/LPSPI1_PCS1/LPUART1_CTS/ADC0_SE2 ADC0_SE2
39 PTE7 PTE7/FTM0_CH7/FTM3_FLT0 DISABLED
40 VSS VSS VSS VSS
41 VDD VDD VDD VDD
42 PTB13 PTB13/FTM0_CH1/FTM3_FLT1/ADC1_SE8/ADC0_SE8 ADC1_SE8/ADC0_SE8 6834 OpAmp Out C (Pin 8)
43 PTB12 PTB12/FTM0_CH0/FTM3_FLT2/ADC1_SE7 ADC1_SE7
44 PTD4 PTD4/FTM0_FLT3/FTM3_FLT3/ADC1_SE6 ADC1_SE6
45 PTD3 PTD3/FTM3_CH5/LPSPI1_PCS0/FXIO_D5/FXIO_D7/TRGMUX_IN4/NMI_b/ADC1_SE3 ADC1_SE3
46 PTD2 PTD2/FTM3_CH4/LPSPI1_SOUT/FXIO_D4/FXIO_D6/TRGMUX_IN5/ADC1_SE2 ADC1_SE2
47 PTA3 PTA3/FTM3_CH1/LPI2C0_SCL/EWM_IN/FXIO_D5/LPUART0_TX/ADC1_SE1 ADC1_SE1 6834 OpAmp Out D (Pin 14)
48 PTA2 PTA2/FTM3_CH0/LPI2C0_SDA/EWM_OUT_b/FXIO_D4/LPUART0_RX/ADC1_SE0 ADC1_SE0
49 PTA1 PTA1/FTM1_CH1/LPI2C0_SDAS/FXIO_D3/FTM1_QD_PHA/LPUART0_RTS/.../CMP0_IN1 ADC0_SE1/CMP0_IN1 FET NTC Temp Sense
50 PTA0 PTA0/FTM2_CH1/LPI2C0_SCLS/FXIO_D2/FTM2_QD_PHA/LPUART0_CTS/.../CMP0_IN0 ADC0_SE0/CMP0_IN0
51 PTC7 PTC7/LPUART1_TX/CAN1_TX/FTM3_CH3/FTM1_QD_PHA/ADC1_SE5 ADC1_SE5
52 PTC6 PTC6/LPUART1_RX/CAN1_RX/FTM3_CH2/FTM1_QD_PHB/ADC1_SE4 ADC1_SE4
53 PTE6 PTE6/LPSPI0_PCS2/FTM3_CH7/LPUART1_RTS/ADC1_SE11 ADC1_SE11
54 PTE2 PTE2/LPSPI0_SOUT/LPTMR0_ALT3/FTM3_CH6/LPUART1_CTS/ADC1_SE10 ADC1_SE10
55 PTA13 PTA13/FTM1_CH7/CAN1_TX/FTM2_QD_PHA DISABLED
56 PTA12 PTA12/FTM1_CH6/CAN1_RX/FTM2_QD_PHB DISABLED
57 PTA11 PTA11/FTM1_CH5/FXIO_D1/CMP0_RRT DISABLED
58 PTA10 PTA10/FTM1_CH4/FXIO_D0/JTAG_TDO/noetm_TRACE_SWO JTAG_TDO/noetm_ TRACE_SWO
59 PTE1 PTE1/LPSPI0_SIN/LPI2C0_HREQ/LPSPI1_PCS0/FTM1_FLT1 DISABLED
60 PTE0 PTE0/LPSPI0_SCK/TCLK1/LPSPI1_SOUT/FTM1_FLT2 DISABLED
61 PTC5 PTC5/FTM2_CH0/RTC_CLKOUT/FTM2_QD_PHB/JTAG_TDI JTAG_TDI
62 PTC4 PTC4/FTM1_CH0/RTC_CLKOUT/EWM_IN/FTM1_QD_PHB/JTAG_TCLK/SWD_CLK/CMP0_IN2 JTAG_TCLK/SWD_CLK JTAG TCLK
63 PTA5 PTA5/TCLK1/RESET_b RESET_b
64 PTA4 PTA4/CMP0_OUT/EWM_OUT_b/JTAG_TMS/SWD_DIO JTAG_TMS/SWD_DIO JTAG TMScasainho
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That is a really important thing to do!!4πr^2 said:
But we also need to know how to turn on the motor controller, at least to keep it powered up when we try to flash and debug the firmware.
Would be nice if you could try to power it it, very careful, using a lab power supply configured to very low current for the case you do some short circuit.
Also, anyone knows were can we buy the connectors to connect directly to the board??
casainho said:
The nearest I can tell, they are JVT PHB Series connectors (or I think a newer designation might be JVT2041). At least it looks to be as close as I can see without actually getting one to plug in! Somewhat rare to have the indexing slots on the short sides of the shroud, as most JST / molex type connectors seem to have the slots/tabs on the long sides.
These JVT connectors seem to be a good match, even down to the tiny 45° chamfer in the corners of the shroud on the latching side of the connector.
https://www.jvtcn.com/goods/detail/item-goods/id-1654/
Attachments
casainho said:
Yes, unfortunately, all I see at the moment are "Minimum quantity 1,000" or "Minimum quantity 5000" wholesalers such as globalsources, etc. https://www.globalsources.com/Connector-terminal/FFC-connectors-1169213502p.htm
Though, technically, at the listed $0.001 each, buying 1,000 would still only cost US $1.00 ! ...probably $250 in shipping, though!
CiDi said:
Another question, since I see you have the whole system laid out.... What makes that "BESST" programmer so special? Do we specifically need that to write new firmware, assuming we have a working firmware file? Is there not some simple converter which can go in it's place instead of the $100 / out of stock BESST?
casainho
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I am pretty sure the BESST is the only well known option, that is a product and provides a good revenue, so that is the best for the shops.4πr^2 said:
We can do the same with USB CAN adaptor (that costs 20€ on Ebay).
Myself I plan to implement everything on the EasyDIY display, so I will be able to change every configuration during a ride, directly on the display.
So actual firmware can be uploaded with USB/CAN adapter? (not just tweaking speed.wheel size settings?)
Is there a guide / instruction set for that?
I'm interested in trying other firmware, but don't have BESST and not looking to spend $100 for one!
Is there a guide / instruction set for that?
I'm interested in trying other firmware, but don't have BESST and not looking to spend $100 for one!
casainho
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That would be another good project!! If someone could write something quick maybe in Python, something without any GUI would more than enough. This are notes we have about what is needed on the software: https://github.com/OpenSourceEBike/Bafang_M500_M600/tree/main/CANBUSCiDi said:
As you can see for the notes, to write the firmware file on the motor controller is a trivial sequence. Someone with a motor controller, a CAN USB adapter and a bit experienced in Python, would develop the software to do it, in only 2 hours.
casainho
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Why do you think the display uses a different wire to power up if there is the VBat wire, that we know will have battery voltage only while de display is enabled??CiDi said:
That 2.2V or other low voltage, I would say depends on the way the shortcircuit is done. Maybe there is a mosfet and a resistor in series (for protection) on the display, and that will not make the 0 volts (ideal shortcircuit) but it is enough to turn on the motor controller.
The only way to make sure is to test and make the shortcircuit.
Just to be clear, when using BEEST, the Vbattery pin will have the voltage battery, right?
casainho
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Ok, I didn't jad that information!CiDi said:
So, since I will not use the Vbattery pin, now I understand I should focus only on GND and P+ pin.
But that is like magic that very different voltages. Can you please clarify which are the values while pressing the power button (even while the display is already on!) and the value while the display is on?
P+ has battery voltage while the display is off? Or only when the display is not connected??
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