Resource.md

Resource

Hardware

• Externsion Board Rev2.0 (STM32F334C6)

Communication

Chip	Function		Board	Name	Remark
			P2.1	+3.3V
			P2.2	GND
PB7	USART1_Rx		P2.3	USART1_Rx
PB6	USART1_Tx		P2.4	USART1_Tx
-	-	-	-	-	-
			P3.1	+3.3V
			P3.2	GND
PB11	USART3_Rx		P3.3	USART3_Rx
PB10	USART3_Tx		P3.4	USART3_Tx

Landing Gear

Chip	Function		Board	Name	Remark
PB4	TIM3_CH1		P8.1	PWM1	Left
			P8.2	7V_OUT
			P8.3	GND
-	-	-	-	-	-
PB5	TIM3_CH2		P9.1	PWM2	Right
			P9.2	7V_OUT
			P9.3	GND
-	-	-	-	-	-
PC13	PC13			STEER_PWR	Relay

Battery Management

Chip	Function		Board	Name	Remark
			P6.1/P7.1	+3.3V
			P6.2/P7.2	GND
PB8	I2C_SCL		P6.3/P7.3	BAT_SCL
PB9	I2C_SDA		P6.4/P7.4	BAT_SDA

Current Monitor

Chip	Function		Board	Name	Remark
PA0	ADC1_IN1		P5.7	ESC_CURNT1
PA1	ADC1_IN2		P5.6	ESC_CURNT2
PA2	ADC1_IN3		P5.5	ESC_CURNT3
PA3	ADC1_IN4		P5.4	ESC_CURNT4
PB0	ADC1_IN11		P5.3	ESC_CURNT5
PB1	ADC1_IN12		P5.2	ESC_CURNT6
			P5.1	GND

LED

Chip	Function		Board	Name	Remark
PB12	PB12			LED1
PB13	PB13			LED2
PB14	PB14			LED3
PB15	PB15			LED4
				LED5	3.3V PWR
				LED6	7V PWR

Unused PWM Pin

Chip	Function		Board	Name	Remark
			P4.1	GND
PA8	TIM1_CH1		P4.2	PWM5
PA9	TIM1_CH2		P4.3	PWM6
PA10	TIM1_CH3		P4.4	PWM7
PA15	TIM2_CH1		P4.5	PWM3
PB3	TIM2_CH2		P4.6	PWM4

Software

System

• TIM2: System Management (1Hz)
• IWDG: Watchdog
• Flash: Save params of system

Communication

• USART1: F3<->FMU for communication (57600bps)
• USART3: F3<->PC for debug (115200bps)

Landing Gear

• TIM3: Landing gear PWM control (50Hz)
• TIM6: Landing gear PWM adjustment (50Hz)

Battery Management

• I2C1: Battery communication
• TIM7: Read & Send Battery message (40Hz)

Current Monitor

• ADC1: Read current of ESC
• TIM15: Send ESC Current Message (20Hz)