ST B-G431B-ESC

The B-G431B-ESC board is based on the STM32G431CB microcontroller, the L6387 driver and STL180N6F7 power MOSFETs.

UART/USART PINS

USART2 is accessible through J3 pads and ST LINK Virtual Console:

USART2_TX - PB3
USART2_RX - PB4

Configuration Sub-directories

nsh:

Configures the NuttShell (nsh) located at apps/examples/nsh. The Configuration enables the serial interfaces on USART2.

foc_f32 and foc_b16:

FOC examples based on hardware on board.

Pin configuration:

Board Function	Chip Function	Chip Pin Number
Phase U high	TIM1_CH1	PA8
Phase U low	TIM1_CH1N	PC13
Phase V high	TIM1_CH2	PA9
Phase V low	TIM1_CH2N	PA12
Phase W high	TIM1_CH3	PA10
Phase W low	TIM1_CH3N	PB15
Current U +	OPAMP1_VINP	PA1
Current U -	OPAMP1_VINM	PA3
Current V +	OPAMP2_VINP	PA7
Current V -	OPAMP2_VINM	PA5
Current W +	OPAMP3_VINP	PB0
Current W -	OPAMP3_VINM	PB2
Temperature		PB14
VBUS	ADC1_IN1	PA0
POT	ADC1_IN11	PB12
LED	GPIO_PC6	PC6
ENCO_A/HALL_H1	TIM4_CH1	PB6
ENCO_B/HALL_H2	TIM4_CH2	PB7
ENCO_Z/HALL_H3	TIM4_CH3	PB8
BUTTON	GPIO_PC10	PC10
PWM		PA15
CAN_RX	FDCAN1_RX	PA11
CAN_TX	FDCAN1_TX	PB9
CAN_TERM		PC14
GPIO_BEMF		PB5
BEMF1	ADC2_IN17	PA4
BEMF2	ADC2_IN5	PC4
BEMF3	ADC2_IN14	PB11

Current shunt resistance = 0.003 PGA gain = 16 Current sense gain = -9.14 (inverted current) Vbus sense gain = 18k/(18k+169k) = 0.0962 Vbus min = ? Vbus max = 25V Iout max = 40A peak BEMF sense gain = 2.2k/(10k+2.2k) = 0.18

IPHASE_RATIO = 1/(R_shunt*gain) = -36.47 VBUS_RATIO = 1/VBUS_gain = 10.4