Notes on RISC-V

Pinmap

Pin Number	Name	Function	Notes
17	PB2	BOOT2	Pulldown
32		IMU INT 1	N/A
30		IMU INT 2	N/A
	PA4	Handle Temp	ADC Input ?
	PA1	Tip Temp	ADC Input ?
	PB1	B Button	Active High
	PB0	A Button	Active High
	PA11	USB D-	-
	PA12	USB D+	-
	PA6	Tip PWM Out	-
	PA0	Input DC V Sense	ADC Input ?
	PA9	OLED Reset
	PB7	SDA	I2C0_SDA
	PB6	SCL	I2C0_SCL

ADC Configuration

For now running in matching mode for TS100

• X channels DMA in background
• Sample tip using "Intereted" channels using TIMER 0,1,3 TRGO or timer0,1,2 channels
• Using just 12 bit mode for now and move to hardware oversampling later
• use DMA for normal samples and 4x16 bit regs for tip temp
• It has dual ADC's so run them in pair mode

Timers

Timer 2

Timer 2 CH0 is tip drive PWM out. This is fixed at 50% duty cycle and used via the cap to turn on the heater tip. This should toggle relatively quickly.