I made a pin-out in Excel. It is copied off of the Discovery board manual. It does not count GND,and 5V pins.
21 BOOT0 X X
6 NRST RESET NRST
12 PA0 USER
11 PA1 USART2_RTS/USART4_RX/ETH_RMII_REF_CLK/ETH_MII_RX_CLK/TIM5_CH2/TIMM2_CH2/ADC123_IN1
14 PA2 USART2_TX/TIM5_CH3/TIM9_CH1/TIM2_CH3/ETH_MDIO/ADC123_IN2
13 PA3 USART2_RX/TIM5_CH4/TIM9_CH2/TIM2_CH4/OTG_HS_ULPI_D0/ETH_MII_COL/ADC123_IN3
16 PA4 LRCK/AIN1x SPI1_NSS/SPI3_NSS/USART2_CK/DCMI_HSYNC/OTG_HS_SOF/I2S3_WS/ADC12_IN4/DAC1_OUT
15 PA5 SCL/SPC SPI1_SCK/OTG_HS_ULPI_CK/TIM2_CH1_ETR/TIM8_CHIN/ADC12_IN5/DAC2_OUT
18 PA6 SDO SPI1_MISO/TIM8_BKIN/TIM13_CH1/DCMI_PIXCLK/TIM3_CH1/TIM1_BKIN/ADC12_IN6
17 PA7 SDA/SDI/SDO SPI1_MOSI/TIM8_CH1N/TIM14_CH1TIM3_CH2/ETH_MII_RX_DV/TIM1_CH1N/RMII_CRS_DV/ADC12_IN7
43 PA8 MCO1/USART1_CK/TIM1_CH1/I2C3_SCL/OTG_FS_SOF
44 PA9 USB VBUS GREEN USART1_TX/TIM1_CH2/I2C3_SMBA/DCMI_D0/OTG_FS_VBUS
41 PA10 USB ID USART1_RX/TIM1_CH3/OTG_FS_ID/DCMI_D1
2 PA11 USB DM USART1_CTS/CAN1_RX/TIM1_CH4/OTG_FS_DM
3 PA12 USB DP USART1_RTS/CAN1_TX/TIM1_ETR/OTG_FS_DP
42 PA13 SWDIO JTMS-SWDIO
39 PA14 SWCLK JTCK-SWCLK
40 PA15 JTDI/SPI3_NSS/I2S3_WS/TIM2_CH1_ETR/SPI1_NSS
22 PB0 TIM3_CH3/TIM8_CH2N/OTG_HS_ULPI_D1/ETH_MII_RXD2/TIM1_CH2N/ADC12_IN8
21 PB1 TIM3_CH4/TIM8_CH3N/OTG_HS_ULPI_D2/ETH_MII_RXD3/OTG_HS_INTN/TIM1_CH3N/ADC12_IN9
24 PB2
28 PB3 JTDO/TRACESWO/SPI3_SCK/I2S3_CK/TIM2_CH2/SPI1_SCK
25 PB4 NJTRST/SPI3_MISO/TIM3_CH1/SPI1_MISO/I2S3ext_SD
26 PB5 I2C1_SMBA/CAN2_RX/OTG_HS_ULPI_D7/ETH_PPS_OUT/TIM3_CH2/SPI1_MOSI/SPI3_MOSI/DCMI_D10/I2S3_SD
23 PB6 SCL I2C1_SCL/TIM4_CH1/CAN2_TX/OTG_FS_INTN/DCMI_D5/USART1_TX
24 PB7 I2C1_SDA/FSMC_NL/DCMI_VSYNC/USART1_RX/TIM4_CH2
19 PB8 TIM4_CH3/SDIO_D4/TIM10_CH1/DCMI_D6/OTG_FS_SCL/ETH_MII_TXD3/I2C1_SCL/CAN1_RX
20 PB9 SDA SPI2_NSS/I2S2_WS/TIM4_CH4/TIM11_CH1/OTG_FS_SDA/SDIO_D5/DCMI_D7/I2C1_SDA/CAN1_TX
34 PB10 CLK SPI2_SCK/I2S2_CK/I2C2_SCL/USART3_TX/OTG_HS_ULPI_D3/ETH_MII_RX_ER/OTG_HS_SCL/TIM2_CH3
35 PB11 I2C2_SDA/USART3_RX/OTG_HS_ULPI_D4/ETH_RMII_TX_EN/ETH_MII_TX_EN/OTG_HS_SDA/TIM2_CH4
36 PB12 SPI2_NSS/I2S2_WS/I2C2_SMBA/USART3_CK/TIM1_BKIN/CAN2_RX/OTG_HS_ULPI_D5/ETH_RMII_TXD0/ETH_MII_TXD0/OTG_HS_ID
37 PB13 SPI2_SCK/I2S2_CK/USART3_CTS/TIM1_CH1N/CAN2_TX/OTG_HS_ULPI_D6/ETH_RMII_TXD1/ETH_MII_TXD1/OTG_HS_VBUS
38 PB14 SPI2_MISO/TIM1_CH2N/TIM12_CH1/OTG_HS_DMUSART3_RTS/TIM8_CH2N/I2S2ext_SD
39 PB15 SPI2_MOSI/I2S2_SD/TIM1_CH3N/TIM8_CH3N/TIM12_CH2/OTG_HS_DP
8 PC0 PowerOn OTG_HS_ULPI_STP/ADC123_IN10
7 PC1 ETH_MDC/ADC123_IN11
10 PC2 SPI2_MISO/OTG_HS_ULPI_DIR/TH_MII_TXD2/I2S2ext_SD/ADC123_IN12
9 PC3 DOUT/AIN4x SPI2_MOSI/I2S2_SD/OTG_HS_ULPI_NXT/ETH_MII_TX_CLK/ADC123_IN13
20 PC4 ETH_RMII_RX_D0/ETH_MII_RX_D0/ADC12_IN14
19 PC5 ETH_RMII_RX_D1/ETH_MII_RX_D1/ADC12_IN15
47 PC6 I2S2_MCK/TIM8_CH1/SDIO_D6/USART6_TX/DCMI_D0/TIM3_CH1
48 PC7 I2S3_MCK/TIM8_CH2/SDIO_D7/USART6_RX/DCMI_D1/TIM3_CH2
45 PC8 MCLK TIM8_CH3/SDIO_D0/TIM3_CH3/USART6_CK/DCMI_D2
46 PC9 I2S_CKIN/MCO2/TIM8_CH4/SDIO_D1/I2C3_SDA/DCMI_D3/TIM3_CH4
37 PC10 SCLK SPI3_SCK/I2S3_CK/UART4_TX/SDIO_D2/DCMI_D8/USART3_TX
38 PC11 UART4_RX/SPI3_MISO/SDIO_D3/DCMI_D4/USART3_RX/I2S3ext_SD
35 PC12 SDIN UART5_TX/SDIO_CK/DCMI_D9/SPI3_MOSI/I2S3_SD/USART3_CK
12 PC13 RTC_AF1
9 PC14 OSC32_IN OSC32_IN
10 PC15 OSC32_OUT OSC32_OUT
36 PD0 FSMC_D2/CAN1_RX
33 PD1 FSMC_D3/CAN1_TX
34 PD2 TIM3_ETR/UART5_RXSDIO_CMD/DCMI_D11
31 PD3 FSMC_CLK/USART2_CTS
32 PD4 FSMC_NOE/USART2_RTS
29 PD5 RESET FSMC_NWE/USART2_TX
30 PD6 OverCurrent FSMC_NWAIT/USART2_RX
27 PD7 RED USART2_CK/FSMC_NE1/FSMC_NCE2
40 PD8 FSMC_D13/USART3_TX
41 PD9 FSMC_D14/USART3_RX
42 PD10 FSMC_D15/USART3_CK
43 PD11 FSMC_A16/USART3_CTS
44 PD12 GREEN FSMC_A17/TIM4_CH1/USART3_RTS
45 PD13 ORANGE FSMC_A18/TIM4_CH2
46 PD14 RED FSMC_D0/TIM4_CH3
47 PD15 BLUE FSMC_D1/TIM4_CH4
17 PE0 INT1 TIM4_ETR/FSMC_NBL0/DCMI_D2
18 PE1 INT2 FSMC_NBL1/DCMI_D3
15 PE2 CS_I2C/SPI TRACECLK/FSMC_A23/ETH_MII_TXD3
16 PE3 TRACED0/FSMC_A19
13 PE4 TRACED1/FSMC_A20/DCMI_D4
14 PE5 TRACED2/FSMC_A21/TIM9_CH1/DCMI_D6
11 PE6 TRACED3/FSMC_A22/TIM9_CH2/DCMI_D7
25 PE7 FSMC_D4/TIM1_ETR
26 PE8 FSMC_D5/TIM1_CH1N
27 PE9 FSMC_D6/TIM1_CH1
28 PE10 FSMC_D7/TIM1_CH2N
29 PE11 FSMC_D8/TIM1_CH2
30 PE12 FSMC_D9/TIM1_CH3N
31 PE13 FSMC_D10/TIM1_CH3
32 PE14 FSMC_D11/TIM1_CH4
33 PE15 FSMC_D12/TIM1_BKIN
7 PH0 OSC_IN OSC_IN
8 PH1 OSC_OUT OSC_OUT