GPIO setup

The following GPIO setup is done by the original firmware on startup:

Port	Pin	Mode	Pull up/down	Speed	Alternate function	Initial value
A	0-7	analog	-	-	ADC1
	8	push/pull	-	very high	MCO_1
	9	open drain	-	low	-	H
	10	push/pull	-	high	-	H
	11	push/pull	-	very high	OTG_FS_DM
	12	push/pull	-	very high	OTG_FS_DP
	15	push/pull	-	medium	-	-
B	0-1	analog	-	-	ADC1
	2	push/pull	-	low	-	L
	3	push/pull	-	high	SPI1_SCK
	4	push/pull	-	high	SPI1_MISO
	5	push/pull	-	high	SPI1_MOSI
	6	push/pull	-	medium	TIM4_CH1
	7	push/pull	-	medium	TIM4_CH2
	8	push/pull	-	medium	TIM10_CH1
	9	push/pull	-	high	TIM11_CH1
	10	push/pull	-	medium	TIM2_CH3
	12	push/pull	-	low	-	L
	13	push/pull	-	high	SPI2_SCK
	14	push/pull	-	very high	SPI2_MISO
	15	push/pull	-	high	SPI2_MOSI
C	0-5	analog	-	-	ADC1
	6	push/pull	-	low	TIM3_CH1
	7	push/pull	-	low	TIM3_CH2
	8	open drain	-	low	-	L
	9	push/pull	-	high	MCO_2
	10	push/pull	-	very high	-	H
	11	input	-	low	-
	12	input	-	low	-
	13	input	-	low	-
	14	input	-	low	-
	15	input	-	low	-
D	0-15	push/pull	-	high	-	H
E	0	push/pull	-	medium	-	H
	1	push/pull	-	medium	-	H
	2	push/pull	-	high	-	H
	3	push/pull	down	high	-	L
	4	push/pull	-	low	-	L
	5	push/pull	-	low	-	L
	6	push/pull	-	medium	TIM9_CH2
	7	Dynamically set as output or input by main loop				L
	8	push/pull	-	high	TIM1_CH1N
	9	push/pull	-	high	TIM1_CH1
	10	push/pull	-	high	TIM1_CH2N
	11	push/pull	-	high	TIM1_CH2
	12	push/pull	-	high	TIM1_CH3N
	13	push/pull	-	high	TIM1_CH3
	14	push/pull	-	high	TIM1_CH4
	15	push/pull	-	very high	-	L