| .. _96b_carbon_board: |
| |
| 96Boards Carbon |
| ############### |
| |
| Overview |
| ******** |
| |
| Zephyr applications use the 96b_carbon configuration to run on the 96Boards |
| Carbon hardware. It is based on the STMicroelectronics STM32F401RET Cortex-M4 |
| CPU and also contains a nRF51832 chip connected over SPI for BLE connectivity. |
| |
| .. figure:: img/96b-carbon-front.png |
| :width: 487px |
| :align: center |
| :alt: 96Boards Carbon |
| |
| 96Boards Carbon |
| |
| Hardware |
| ******** |
| |
| 96Boards Carbon provides the following hardware components: |
| |
| - STM32F401RET6 in LQFP64 package |
| - ARM |reg| 32-bit Cortex |reg|-M4 CPU with FPU |
| - 84 MHz max CPU frequency |
| - VDD from 1.7 V to 3.6 V |
| - 512 KB Flash |
| - 96 KB SRAM |
| - GPIO with external interrupt capability |
| - 12-bit ADC with 16 channels |
| - RTC |
| - Advanced-control Timer |
| - General Purpose Timers (7) |
| - Watchdog Timers (2) |
| - USART/UART (4) |
| - I2C (3) |
| - SPI (3) |
| - SDIO |
| - USB 2.0 OTG FS |
| - DMA Controller |
| - Bluetooth LE over SPI, provided by nRF51832 |
| |
| More information about STM32F401RE can be found here: |
| - `STM32F401RE on www.st.com`_ |
| - `STM32F401 reference manual`_ |
| |
| Supported Features |
| ================== |
| |
| The Zephyr 96b_carbon board configuration supports the following hardware |
| features: |
| |
| +-----------+------------+-------------------------------------+ |
| | Interface | Controller | Driver/Component | |
| +===========+============+=====================================+ |
| | NVIC | on-chip | nested vector interrupt controller | |
| +-----------+------------+-------------------------------------+ |
| | SYSTICK | on-chip | system clock | |
| +-----------+------------+-------------------------------------+ |
| | UART | on-chip | serial port | |
| +-----------+------------+-------------------------------------+ |
| | GPIO | on-chip | gpio | |
| +-----------+------------+-------------------------------------+ |
| | PINMUX | on-chip | pinmux | |
| +-----------+------------+-------------------------------------+ |
| | FLASH | on-chip | flash | |
| +-----------+------------+-------------------------------------+ |
| | SPI | on-chip | spi | |
| +-----------+------------+-------------------------------------+ |
| |
| More details about the board can be found at `96Boards website`_. |
| |
| The default configuration can be found in the defconfig file: |
| |
| ``boards/arm/96b_carbon/96b_carbon_defconfig`` |
| |
| Pin Mapping |
| =========== |
| |
| LED |
| --- |
| |
| - LED1 / User1 LED = PD2 |
| - LED2 / User2 LED = PA15 |
| - LED3 / BT LED = PB5 |
| - LED4 / Power LED = VCC |
| |
| Push buttons |
| ------------ |
| |
| - BUTTON = BOOT0 (SW1) |
| - BUTTON = RST |
| |
| External Connectors |
| ------------------- |
| |
| Low Speed Header |
| |
| +--------+-------------+----------------------+ |
| | PIN # | Signal Name | STM32F401 Functions | |
| +========+=============+======================+ |
| | 1 | UART2_CTS | PA0 | |
| +--------+-------------+----------------------+ |
| | 3 | UART2_TX | PA2 | |
| +--------+-------------+----------------------+ |
| | 5 | UART2_RX | PA3 | |
| +--------+-------------+----------------------+ |
| | 7 | UART2_RTS | PA1 | |
| +--------+-------------+----------------------+ |
| | 9 | GND | GND | |
| +--------+-------------+----------------------+ |
| | 11 | USB5V | USB5V | |
| +--------+-------------+----------------------+ |
| | 13 | AIN12 | PC2 | |
| +--------+-------------+----------------------+ |
| | 15 | AIN14 | PC4 | |
| +--------+-------------+----------------------+ |
| | 17 | UART6_TX | PC6 | |
| +--------+-------------+----------------------+ |
| | 19 | GPIO | PC8 | |
| +--------+-------------+----------------------+ |
| | 21 | I2C1_SCL | PB6 | |
| +--------+-------------+----------------------+ |
| | 23 | I2C1_SCA | PB7 | |
| +--------+-------------+----------------------+ |
| | 25 | I2C2_SCA | PB3 | |
| +--------+-------------+----------------------+ |
| | 27 | I2C2_SCL | PB10 | |
| +--------+-------------+----------------------+ |
| | 29 | RST_BTN | RST_BTN | |
| +--------+-------------+----------------------+ |
| |
| +--------+-------------+----------------------+ |
| | PIN # | Signal Name | STM32F401 Functions | |
| +========+=============+======================+ |
| | 2 | SPI2_SS | PB12 | |
| +--------+-------------+----------------------+ |
| | 4 | SPI2_MOSI | PB15 | |
| +--------+-------------+----------------------+ |
| | 6 | SPI2_MISO | PB14 | |
| +--------+-------------+----------------------+ |
| | 8 | SPI2_SCK | PB13 | |
| +--------+-------------+----------------------+ |
| | 10 | GND | GND | |
| +--------+-------------+----------------------+ |
| | 12 | VCC2 | VCC2 | |
| +--------+-------------+----------------------+ |
| | 14 | AIN13 | PC3 | |
| +--------+-------------+----------------------+ |
| | 16 | AIN15 | PC5 | |
| +--------+-------------+----------------------+ |
| | 18 | UART6_RX | PC7 | |
| +--------+-------------+----------------------+ |
| | 20 | GPIO | PC9 | |
| +--------+-------------+----------------------+ |
| | 22 | I2C1_SCL | PB8 | |
| +--------+-------------+----------------------+ |
| | 24 | I2C1_SDA | PB9 | |
| +--------+-------------+----------------------+ |
| | 26 | AIN10 | PC0 | |
| +--------+-------------+----------------------+ |
| | 28 | AIN11 | PC1 | |
| +--------+-------------+----------------------+ |
| | 30 | NC | NC | |
| +--------+-------------+----------------------+ |
| |
| System Clock |
| ============ |
| |
| STM32F4 has two external oscillators. The frequency of the slow clock is |
| 32.768 kHz. The frequency of the main clock is 16 MHz. |
| |
| Flashing Zephyr onto 96Boards Carbon |
| ************************************ |
| |
| There are 2 main entry points for flashing STM32F4X SoCs, one using the ROM |
| bootloader, and another by using the SWD debug port (which requires additional |
| hardware). Flashing using the ROM bootloader requires a special activation |
| pattern, which can be triggered by using the BOOT0 pin. The ROM bootloader |
| supports flashing via USB (DFU), UART, I2C and SPI. You can read more about |
| how to enable and use the ROM bootloader by checking the application |
| note `AN2606`_, page 109. |
| |
| Installing dfu-util |
| =================== |
| |
| It is recommended to use at least v0.8 of `dfu-util`_. The package available in |
| debian/ubuntu can be quite old, so you might have to build dfu-util from source. |
| |
| Flashing an Application to 96Boards Carbon |
| ------------------------------------------ |
| |
| The sample application :ref:`hello_world` is being used in this tutorial: |
| |
| .. code-block:: console |
| |
| $<zephyr_root_path>/samples/hello_world |
| |
| To build the Zephyr kernel and application, enter: |
| |
| .. code-block:: console |
| |
| $ cd <zephyr_root_path> |
| $ source zephyr-env.sh |
| $ cd $ZEPHYR_BASE/samples/hello_world/ |
| $ make BOARD=96b_carbon |
| |
| Connect the micro-USB cable to the USB OTG Carbon port and to your computer. |
| The board should power ON. Force the board into DFU mode by keeping the BOOT0 |
| switch pressed while pressing and releasing the RST switch. |
| |
| Confirm that the board is in DFU mode: |
| |
| .. code-block:: console |
| |
| $ sudo dfu-util -l |
| dfu-util 0.8 |
| Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. |
| Copyright 2010-2014 Tormod Volden and Stefan Schmidt |
| This program is Free Software and has ABSOLUTELY NO WARRANTY |
| Please report bugs to dfu-util@lists.gnumonks.org |
| Found DFU: [0483:df11] ver=2200, devnum=15, cfg=1, intf=0, alt=3, name="@Device Feature/0xFFFF0000/01*004 e", serial="3574364C3034" |
| Found DFU: [0483:df11] ver=2200, devnum=15, cfg=1, intf=0, alt=2, name="@OTP Memory /0x1FFF7800/01*512 e,01*016 e", serial="3574364C3034" |
| Found DFU: [0483:df11] ver=2200, devnum=15, cfg=1, intf=0, alt=1, name="@Option Bytes /0x1FFFC000/01*016 e", serial="3574364C3034" |
| Found DFU: [0483:df11] ver=2200, devnum=15, cfg=1, intf=0, alt=0, name="@Internal Flash /0x08000000/04*016Kg,01*064Kg,03*128Kg", serial="3574364C3034" |
| Found Runtime: [05ac:8290] ver=0104, devnum=2, cfg=1, intf=5, alt=0, name="UNKNOWN", serial="UNKNOWN" |
| |
| You should see following confirmation on your Linux host: |
| |
| .. code-block:: console |
| |
| $ dmesg |
| usb 1-2.1: new full-speed USB device number 14 using xhci_hcd |
| usb 1-2.1: New USB device found, idVendor=0483, idProduct=df11 |
| usb 1-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 |
| usb 1-2.1: Product: STM32 BOOTLOADER |
| usb 1-2.1: Manufacturer: STMicroelectronics |
| usb 1-2.1: SerialNumber: 3574364C3034 |
| |
| Flash a new application to the board: |
| |
| .. code-block:: console |
| |
| $ sudo dfu-util -d [0483:df11] -a 0 -D outdir/96b_carbon/zephyr.bin -s 0x08000000 |
| |
| Connect the micro-USB cable to the USB UART (FTDI) port and to your computer. |
| Run your favorite terminal program to listen for output. |
| |
| .. code-block:: console |
| |
| $ minicom -D <tty_device> -b 115200 |
| |
| Replace :code:`<tty_device>` with the port where the board 96Boards Carbon |
| can be found. For example, under Linux, :code:`/dev/ttyUSB0`. |
| The ``-b`` option sets baud rate ignoring the value from config. |
| |
| Press the Reset button and you should see the the following message in your |
| terminal: |
| |
| .. code-block:: console |
| |
| Hello World! arm |
| |
| .. _dfu-util: |
| http://dfu-util.sourceforge.net/build.html |
| |
| .. _AN2606: |
| http://www.st.com/content/ccc/resource/technical/document/application_note/b9/9b/16/3a/12/1e/40/0c/CD00167594.pdf/files/CD00167594.pdf/jcr:content/translations/en.CD00167594.pdf |
| |
| .. _96Boards website: |
| http://www.96boards.org/documentation |
| |
| .. _STM32F401RE on www.st.com: |
| http://www.st.com/en/microcontrollers/stm32f401re.html |
| |
| .. _STM32F401 reference manual: |
| http://www.st.com/resource/en/reference_manual/dm00096844.pdf |
