Ver código fonte para STM32 F4VE

[[File:STM32F407VET6 Front.jpg|200px|thumb|Front]]
[[File:STM32F407VET6 Dimensions.jpg|200px|thumb|Dimensions]]
[[File:STM32F407VET6 Legend.jpg|200px|thumb|Features]]

== Overview ==
The STM32 F4VE is a small development board based on the STM32F407VET6 microcontroller.
It breaks out all CPU pins via two 2×24 pin headers and supports expansion through
multiple peripheral connectors.

Board marked "STM32F4XX STM32_F4VE V2.0  1509" on the back.

{| class="wikitable"
! colspan="2" | Board
|-
| Name || STM32 F4VE
|-
| Part || STM32_F4VE
|-
| Origin || China
|-
| PCB Color || Black
|-
| PCB Size || 62mm × 85mm
|-
| Mounting || 4× M3 holes
|}

=== Warnings ===
* '''Warning:''' The +5V pins are directly connected to the USB +5V pin with no protection. Do not power the board through USB and an external power supply at the same time.
* '''Warning:''' The board has an extra pull-up resistor on D+ (R21, 1.5kΩ) that violates the USB specification when the MCU's internal pull-ups are also active. This may cause USB errors. USB data lines also have 22Ω series resistors (R18, R19) for protection.

== Microcontroller ==

{| class="wikitable"
! colspan="2" | STM32F407VET6
|-
| Manufacturer || ST Microelectronics
|-
| Core || ARM Cortex-M4 32-bit + FPU
|-
| Max. Clock || 168 MHz
|-
| Operating Voltage || 1.8V – 3.6V
|-
| Package || LQFP100
|}

{| class="wikitable"
! colspan="2" | Memory
|-
| Flash || 512 KiB
|-
| SRAM || 192 KiB
|-
| Backup SRAM || 4 KiB
|}

{| class="wikitable"
! colspan="2" | Oscillators
|-
| HSI || 16 MHz
|-
| LSI || 32 kHz
|-
| HSE || 8 MHz (Y2)
|-
| LSE || 32.768 kHz (Y1)
|}

=== Peripherals ===
* 3× SPI
* 3× USART + 2× UART
* 2× I2S
* 3× I2C
* 1× FSMC
* 1× SDIO
* 2× CAN
* 1× USB 2.0 FS/HS (with DMA)
* 1× USB HS ULPI (for external PHY)
* 1× 10/100 Ethernet MAC
* 1× 8–12-bit parallel camera interface
* 3× ADC 12-bit (1 µs)
* 2× DAC 12-bit
* Single-cycle DSP instructions

== Board Hardware ==

=== Power ===
{| class="wikitable"
! colspan="2" | Voltage Regulator — AMS1117-3.3V (U1)
|-
| Input || +4.6V to +15V
|-
| Output || +3.3V @ 1A
|-
| Package || SOT223
|-
| Power Sources || +5V pin, +3.3V pin, USB
|}

=== LEDs ===
{| class="wikitable"
! Ref !! GPIO !! Resistor !! Mode
|-
| D1 (Power) || +3.3V rail || R5 (510Ω) || Always on
|-
| D2 (User) || PA6 || R13 (510Ω) || Sink (active low)
|-
| D3 (User) || PA7 || R14 (510Ω) || Sink (active low)
|}

=== Buttons ===
{| class="wikitable"
! Label !! GPIO !! Mode
|-
| RST || NRST || Active low
|-
| K_UP || PA0 || Active high
|-
| K0 || PE4 || Active low
|-
| K1 || PE3 || Active low
|}

=== Boot Mode Jumpers ===
{| class="wikitable"
! Label !! Connected to !! Notes
|-
| BT0 || BOOT0 || Part of Header 2 (J3, pin 5). GND via R7 by default.
|-
| BT1 || PB2 (BOOT1) || Part of Header 2 (J3, pin 6). GND via R8 by default.
|}
''Note: Both BOOT pins are pulled to GND by default (R7, R8 = 10kΩ), booting from flash. Jumper caps are pre-installed for convenience.''

=== On-board Devices ===
{| class="wikitable"
! colspan="2" | SPI Flash — W25Q16 (U3)
|-
| Capacity || 2 MiB (16 Mbit)
|-
| Interface || SPI1
|-
| Package || SOP-8
|-
| /CS (F_CS) || PB0 (10kΩ pull-up via R20)
|-
| DO (MISO) || PB4 / SPI1_MISO
|-
| DI (MOSI) || PB5 / SPI1_MOSI
|-
| CLK || PB3 / SPI1_SCK
|-
| /WP || +3.3V (always writable)
|-
| /HOLD || +3.3V
|}

{| class="wikitable"
! colspan="2" | RTC Backup Battery
|-
| Type || CR1220
|-
| Protection || BAT54C dual Schottky diode (Q1)
|}

== Connectors & Pinouts ==

=== GPIO Headers ===
Two 2×24 pin headers (2.54mm, male) break out all GPIO.

'''Note:''' PB3, PB5, PB6, PB7 are shared with the nRF24L01 header (SPI1). PB3/PB4 are also used for JTAG (TDO/TRST). PA13/PA14 are JTAG only and do not appear on the GPIO headers.

<div style="display:flex; gap:2em; flex-wrap:wrap;">
{| class="wikitable"
|+ Header 1 — J2
! Pin !! GPIO !!  !! GPIO !! Pin
|-
| 1 || 5V || || 5V || 2
|-
| 3 || 5V || || 5V || 4
|-
| 5 || 3V3 || || 3V3 || 6
|-
| 7 || 3V3 || || 3V3 || 8
|-
| 9 || GND || || GND || 10
|-
| 11 || PE2 || || PE3 || 12
|-
| 13 || PE4 || || PE5 || 14
|-
| 15 || PE6 || || PC13 || 16
|-
| 17 || PC0 || || PC1 || 18
|-
| 19 || PC2 || || PC3 || 20
|-
| 21 || VREF- || || VREF+ || 22
|-
| 23 || PA0 || || PA1 || 24
|-
| 25 || PA2 || || PA3 || 26
|-
| 27 || PA4 || || PA5 || 28
|-
| 29 || PA6 || || PA7 || 30
|-
| 31 || PC4 || || PC5 || 32
|-
| 33 || PB0 || || PB1 || 34
|-
| 35 || PE7 || || PE8 || 36
|-
| 37 || PE9 || || PE10 || 38
|-
| 39 || PE11 || || PE12 || 40
|-
| 41 || PE13 || || PE14 || 42
|-
| 43 || PE15 || || PB10 || 44
|-
| 45 || PB11 || || PB12 || 46
|-
| 47 || PB13 || || PB14 || 48
|}

{| class="wikitable"
|+ Header 2 — J3
! Pin !! GPIO !!  !! GPIO !! Pin
|-
| 1 || 3V3 || || 3V3 || 2
|-
| 3 || 3V3 || || 3V3 || 4
|-
| 5 || BT0 (BOOT0) || || BT1 (PB2) || 6
|-
| 7 || GND || || GND || 8
|-
| 9 || GND || || GND || 10
|-
| 11 || PE1 || || PE0 || 12
|-
| 13 || PB9 || || PB8 || 14
|-
| 15 || PB7 ¹ || || PB6 ¹ || 16
|-
| 17 || PB5 ¹ || || PB3 ¹ || 18
|-
| 19 || PD7 || || PD6 || 20
|-
| 21 || PD5 || || PD4 || 22
|-
| 23 || PD3 || || PD2 || 24
|-
| 25 || PD1 || || PD0 || 26
|-
| 27 || PC12 || || PC11 || 28
|-
| 29 || PC10 || || PA15 || 30
|-
| 31 || PA12 || || PA11 || 32
|-
| 33 || PA10 || || PA9 || 34
|-
| 35 || PA8 || || PC9 || 36
|-
| 37 || PC8 || || PC7 || 38
|-
| 39 || PC6 || || PD15 || 40
|-
| 41 || PD14 || || PD13 || 42
|-
| 43 || PD12 || || PD11 || 44
|-
| 45 || PD10 || || PD9 || 46
|-
| 47 || PD8 || || PB15 || 48
|}
</div>

¹ Shared with nRF24L01 header (SPI1): PB3=SCK, PB5=MOSI, PB6=CE, PB7=CS.

=== JTAG / SWD Header (P1) — 2×10 ===
{| class="wikitable"
! Pin !! Function !!  !! Function !! Pin
|-
| 1 || +3.3V || || +3.3V || 2
|-
| 3 || TRST (PB4) || || GND || 4
|-
| 5 || TDI (PA15) || || GND || 6
|-
| 7 || TMS/SWDIO (PA13) || || GND || 8
|-
| 9 || TCLK/SWCLK (PA14) || || GND || 10
|-
| 11 || RTCK (N.C.) || || GND || 12
|-
| 13 || TDO/SWO (PB3) || || GND || 14
|-
| 15 || RESET (NRST) || || GND || 16
|-
| 17 || N.C. || || GND || 18
|-
| 19 || N.C. || || GND || 20
|}

=== TFT LCD Header (J1) — 2×16 ===
{| class="wikitable"
! Pin !! Function !!  !! Function !! Pin
|-
| 1 || GND || || RST || 2
|-
| 3 || FSMC_D15 (PD10) || || FSMC_D14 (PD9) || 4
|-
| 5 || FSMC_D13 (PD8) || || FSMC_D12 (PE15) || 6
|-
| 7 || FSMC_D11 (PE14) || || FSMC_D10 (PE13) || 8
|-
| 9 || FSMC_D9 (PE12) || || FSMC_D8 (PE11) || 10
|-
| 11 || FSMC_D7 (PE10) || || FSMC_D6 (PE9) || 12
|-
| 13 || FSMC_D5 (PE8) || || FSMC_D4 (PE7) || 14
|-
| 15 || FSMC_D3 (PD1) || || FSMC_D2 (PD0) || 16
|-
| 17 || FSMC_D1 (PD15) || || FSMC_D0 (PD14) || 18
|-
| 19 || FSMC_NOE (PD4) || || FSMC_NWE (PD5) || 20
|-
| 21 || FSMC_A18 (PD13) || || FSMC_NE1 (PD7) || 22
|-
| 23 || Touch_CLK (PB13) || || Touch_CS (PB12) || 24
|-
| 25 || Touch_MOSI (PB15) || || Touch_MISO (PB14) || 26
|-
| 27 || Touch_PEN (PC5) || || LCD_BL (PB1) ² || 28
|-
| 29 || VBAT (N.C.) || || GND || 30
|-
| 31 || +3.3V || || GND || 32
|}

² LCD backlight (PB1) is driven via PNP transistor Q2, not directly.

=== nRF24L01 Header (JP2) — 2×4 ===
{| class="wikitable"
! Pin !! Function !!  !! Function !! Pin
|-
| 1 || GND || || VCC (+3.3V) || 2
|-
| 3 || CE (PB6) || || CSN (PB7) || 4
|-
| 5 || SCK (PB3) || || MOSI (PB5) || 6
|-
| 7 || MISO (PB4) || || IRQ (PB8) || 8
|}

=== Serial Header (J6) — 1×4 ===
{| class="wikitable"
! Pin !! Function !! GPIO
|-
| 1 || VCC || +5V
|-
| 2 || GND || Ground
|-
| 3 || RX || PA10 (USART1_RX)
|-
| 4 || TX || PA9 (USART1_TX)
|}

=== MiniSD Connector (U5) ===
{| class="wikitable"
! Pin !! Function !! GPIO
|-
| 1 || DAT2 || PC10 (SDIO_D2)
|-
| 2 || CD/DAT3 || PC11 (SDIO_D3)
|-
| 3 || CMD || PD2 (SDIO_CMD)
|-
| 4 || VDD || +3.3V
|-
| 5 || CLK || PC12 (SDIO_SCK)
|-
| 6 || VSS || Ground
|-
| 7 || DAT0 || PC8 (SDIO_D0)
|-
| 8 || DAT1 || PC9 (SDIO_D1)
|-
| 9 || CD || N.C.
|}
''Note: SDIO data lines and CMD have 10kΩ pull-up resistors (R24, R26–R29).''

=== USB Mini Connector (J4) ===
{| class="wikitable"
! Pin !! Function !! GPIO
|-
| 1 || VCC || +5V
|-
| 2 || D- || PA11 (USB_DM), 22Ω series (R19)
|-
| 3 || D+ || PA12 (USB_DP), 22Ω series (R18), 1.5kΩ pull-up (R21)
|-
| 4 || ID || N.C.
|-
| 5 || GND || Ground
|}

== Development ==

=== Toolchain ===
Generate the project with '''STM32CubeMX''' in '''Makefile''' format, then compile with the [https://developer.arm.com/open-source/gnu-toolchain/gnu-rm GNU ARM Embedded Toolchain].

=== Flashing ===
Use an '''ST-Link V2''' programmer and the [https://github.com/texane/stlink stlink] software:
<syntaxhighlight lang="shell">
st-flash write build/blinky.bin 0x8000000
</syntaxhighlight>

=== Debugging ===
Run '''st-util''' in a separate terminal, then launch GDB:
<syntaxhighlight lang="shell">
arm-none-eabi-gdb --eval-command="tar extended-remote :4242" build/blinky.elf
</syntaxhighlight>

== Documentation ==
[[File:STM32F407VET6 Pinmap.jpg|200px|thumb|Pinmap]]

* Board schematic (ZET6 variant — mostly applicable): [[Media:STM32F407ZET6_sch-1.pdf]]
** Note: MCU pin numbers differ; I/O connectors have fewer pins; SDRAM not present on this board.
* Alternative schematic with PCB layout and BOM: [[Media:STM32_F4VE_SCHEMATIC.PDF]]
* Original schematic: [https://stm32-base.org/assets/pdf/boards/original-schematic-STM32F407VET6-STM32_F4VE_V2.0.pdf STM32_F4VE_V2.0 Schematic (stm32-base.org)]
* Demo software translated manual: [[Media:STM32F407_example_manual.ja.en.pdf]]

== External Links ==
* [https://www.st.com/en/microcontrollers-microprocessors/stm32f407ve.html STM32F407VE Product Page — ST]
* [https://www.st.com/resource/en/reference_manual/dm00031020.pdf STM32F4 Reference Manual]
* [https://www.st.com/en/development-tools/stm32cubemx.html STM32CubeMX]
* [https://stm32-base.org/boards/STM32F407VET6-STM32-F4VE-V2.0.html STM32-base project page]
* [https://developer.arm.com/open-source/gnu-toolchain/gnu-rm GNU ARM Embedded Toolchain]
* [https://github.com/texane/stlink stlink — Open source ST-Link software]

[[Category:Electrónica]]