YST-DXT-J20 Mainboard firmware doesn't drive properly

[scagdas]

Your System

• VARIANT: USART
• CONTROL TYPE: FOC
• CONTROL MODE: SPD_MODE

I have new generation cards with bluetooth. Board has YST-DXT-J20 tag on it and GD32F103RCT6 as main controller. I have successfully flashed the firmware and connected to mainboard with UART however motors doesn't turn with a given speed. Even with low speeds Motor at the mainboard side turns very fast and other one doesn't turn at all. After going through the previously posted issues I have seen some people managed to fix the issue by swapping phase cables so I have tried all combinations of three cables but it didn't fix the problem for me.

Any advice how to find and fix the problem?

[Candas1]

This board looks really different, it even has an IMU.
Looks like the board with Artery chip, but with a GD32 instead.
Have you checked this link ?
The firmware won't work out of the box, you need to check how the pin mapping differs.

[developmore]

I have a standard board with STM32F103RCT6. Compiled for i-BUS. Have the same problem. One wheel spins out of control, the other one barely moving.
Anyone knows how to fix it?

[Candas1]

#224

[scagdas]

I have compared the pins of this board with older boards and they are exactly the same at least the ones that drive transistors of the H bridges (PH_HI and LO) and HALL cables but for some reason it doesn't work like previous boards. Is there anything else that might interfere with the motors except these pins so I can compare them with older boards?

[Candas1]

Have you tried voltage mode instead of speed mode?

[Candas1]

Came across this comment:
lucysrausch/hoverboard-firmware-hack#97 (comment)

[villamany]

Hi, try swapping hall pins definition in "defines.h" file, mine works swapping the V / W hall pins on both motors.

Here is mine:

#define LEFT_HALL_U_PIN GPIO_PIN_5//GPIO_PIN_5
#define LEFT_HALL_V_PIN GPIO_PIN_7//GPIO_PIN_6
#define LEFT_HALL_W_PIN GPIO_PIN_6//GPIO_PIN_7

#define LEFT_HALL_U_PORT GPIOB
#define LEFT_HALL_V_PORT GPIOB
#define LEFT_HALL_W_PORT GPIOB

#define RIGHT_HALL_U_PIN GPIO_PIN_10//GPIO_PIN_10
#define RIGHT_HALL_V_PIN GPIO_PIN_12//GPIO_PIN_11
#define RIGHT_HALL_W_PIN GPIO_PIN_11//GPIO_PIN_12

[Candas1]

Assuming this board is the same as the AT32 board, but only with a GD32 instead, those are the differences that are highlighted and mentioned in the discussion I have shared:

• ADC current reading has to be swapped between phase A and B on the left side in bldc.c
• offsets have to be reset after each enable in bldc.c (I don't know what's the reason behind this change)
• current limiting is not working
• FOC is not working, you should probably try with sinusoidal instead