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diff --git a/boards/arm/disco_l475_iot1/doc/disco_l475_iot1.rst b/boards/arm/disco_l475_iot1/doc/disco_l475_iot1.rst new file mode 100644 index 000000000..44e982a1b --- /dev/null +++ b/boards/arm/disco_l475_iot1/doc/disco_l475_iot1.rst @@ -0,0 +1,245 @@ +.. _disco_l475_iot1_board: + +ST Disco L475 IOT01 +################### + +Overview +******** + +The B-L475E-IOT01A Discovery kit for IoT node allows users to develop +applications with direct connection to cloud servers. +The Discovery kit enables a wide diversity of applications by exploiting +low-power communication, multiway sensing and ARM® Cortex® -M4 core-based +STM32L4 Series features. + +This kit provides: + +- 64-Mbit Quad-SPI (Macronix) Flash memory +- Bluetooth® V4.1 module (SPBTLE-RF) +- Sub-GHz (868 or 915 MHz) low-power-programmable RF module (SPSGRF-868 or SPSGRF-915) +- Wi-Fi® module Inventek ISM43362-M3G-L44 (802.11 b/g/n compliant) +- Dynamic NFC tag based on M24SR with its printed NFC antenna +- 2 digital omni-directional microphones (MP34DT01) +- Capacitive digital sensor for relative humidity and temperature (HTS221) +- High-performance 3-axis magnetometer (LIS3MDL) +- 3D accelerometer and 3D gyroscope (LSM6DSL) +- 260-1260 hPa absolute digital output barometer (LPS22HB) +- Time-of-Flight and gesture-detection sensor (VL53L0X) +- 2 push-buttons (user and reset) +- USB OTG FS with Micro-AB connector +- Expansion connectors: + - Arduino™ Uno V3 + - PMOD +- Flexible power-supply options: + - ST LINK USB VBUS or external sources +- On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: + - mass storage, virtual COM port and debug port + + +.. image:: img/disco_l475_iot1.jpg + :width: 531px + :align: center + :height: 354px + :alt: Disco L475 IoT1 + +More information about the board can be found at the `Disco L475 IoT1 website`_. + +Hardware +******** + +The STM32L475RG SoC provides the following hardware IPs: + +- Ultra-low-power with FlexPowerControl (down to 130 nA Standby mode and 100 μA/MHz run mode) +- Core: ARM® 32-bit Cortex®-M4 CPU with FPU, frequency up to 80 MHz, 100DMIPS/1.25DMIPS/MHz (Dhrystone 2.1) +- Clock Sources: + - 4 to 48 MHz crystal oscillator + - 32 kHz crystal oscillator for RTC (LSE) + - Internal 16 MHz factory-trimmed RC (±1%) + - Internal low-power 32 kHz RC (±5%) + - Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy) + - 3 PLLs for system clock, USB, audio, ADC +- RTC with HW calendar, alarms and calibration +- Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors +- 16x timers: + - 2x 16-bit advanced motor-control + - 2x 32-bit and 5x 16-bit general purpose + - 2x 16-bit basic + - 2x low-power 16-bit timers (available in Stop mode) + - 2x watchdogs + - SysTick timer +- Up to 114 fast I/Os, most 5 V-tolerant, up to 14 I/Os with independent supply down to 1.08 V +- Memories + - Up to 1 MB Flash, 2 banks read-while-write, proprietary code readout protection + - Up to 128 KB of SRAM including 32 KB with hardware parity check + - External memory interface for static memories supporting SRAM, PSRAM, NOR and NAND memories + - Quad SPI memory interface +- 4x digital filters for sigma delta modulator +- Rich analog peripherals (independent supply) + - 3x 12-bit ADC 5 MSPS, up to 16-bit with hardware oversampling, 200 μA/MSPS + - 2x 12-bit DAC, low-power sample and hold + - 2x operational amplifiers with built-in PGA + - 2x ultra-low-power comparators +- 18x communication interfaces + - USB OTG 2.0 full-speed, LPM and BCD + - 2x SAIs (serial audio interface) + - 3x I2C FM+(1 Mbit/s), SMBus/PMBus + - 6x USARTs (ISO 7816, LIN, IrDA, modem) + - 3x SPIs (4x SPIs with the Quad SPI) + - CAN (2.0B Active) and SDMMC interface + - SWPMI single wire protocol master I/F +- 14-channel DMA controller +- True random number generator +- CRC calculation unit, 96-bit unique ID +- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™ + + +More information about STM32L476RG can be found here: + - `STM32L475RG on www.st.com`_ + - `STM32L475 reference manual`_ + +Supported Features +================== + +The Zephyr Disco L475 IoT board configuration supports the following hardware features: + ++-----------+------------+-------------------------------------+ +| Interface | Controller | Driver/Component | ++===========+============+=====================================+ +| NVIC | on-chip | nested vector interrupt controller | ++-----------+------------+-------------------------------------+ +| UART | on-chip | serial port-polling; | +| | | serial port-interrupt | ++-----------+------------+-------------------------------------+ +| PINMUX | on-chip | pinmux | ++-----------+------------+-------------------------------------+ +| GPIO | on-chip | gpio | ++-----------+------------+-------------------------------------+ +| I2C | on-chip | i2c | ++-----------+------------+-------------------------------------+ +| PWM | on-chip | pwm | ++-----------+------------+-------------------------------------+ + +Other hardware features are not yet supported on this Zephyr port. + +The default configuration can be found in the defconfig file: + + ``boards/arm/disco_l475_iot1/disco_l475_iot1_defconfig`` + + +Connections and IOs +=================== + +Disco L475 IoT Board has 8 GPIO controllers. These controllers are responsible for pin muxing, +input/output, pull-up, etc. + +Available pins: +--------------- + +For detailed information about available pins please refer to `STM32 Disco L475 IoT1 board User Manual`_. + +Default Zephyr Peripheral Mapping: +---------------------------------- + +- UART_1_TX : PB6 +- UART_1_RX : PB7 +- UART_2_TX : PA2 +- UART_2_RX : PA3 +- I2C_1_SCL : PB8 +- I2C_1_SDA : PB9 +- I2C_2_SCL : PB10 +- I2C_2_SDA : PB11 +- SPI_1_SCK : PA5 +- SPI_1_MISO : PA6 +- SPI_1_MOSI : PA7 +- PWM_2_CH1 : PA15 +- USER_PB : PC13 +- LD2 : PA5 + +System Clock +------------ + +Disco L475 IoT System Clock could be driven by internal or external oscillator, +as well as main PLL clock. By default System clock is driven by PLL clock at 80MHz, +driven by 16MHz high speed internal oscillator. + +Serial Port +----------- + +Disco L475 IoT board has 6 U(S)ARTs. The Zephyr console output is assigned to UART1. +Default settings are 115200 8N1. + + +Programming and Debugging +************************* + +Flashing +======== + +Disco L475 IoT board includes an ST-LINK/V2-1 embedded debug tool interface. +This interface is not supported by the openocd version 0.9 included by the Zephyr SDK v0.9. +Until we update the Zephyr SDK, use openocd v0.10.0 from the openocd-stm32 project on GitHub +to get the minimum set of scripts needed to flash and debug STM32 development boards. + +.. code-block:: console + + $ git clone https://github.com/erwango/openocd-stm32.git + +Then follow instructions in README.md + + +Flashing an application to Disco L475 IoT +----------------------------------------- + +The sample application :ref:`hello_world` is being used in this tutorial: + +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=disco_l475_iot1 + +Connect the Disco L475 IoT to your host computer using the USB port. +Then, enter the following command: + +.. code-block:: console + + $ cd <openocd-stm32_path> + $ stm32_flsh l4 $ZEPHYR_BASE/samples/hello_world/outdir/disco_l475_iot1/zephyr.bin + +Run a serial host program to connect with your Nucleo board. + +.. code-block:: console + + $ minicom -D /dev/ttyACM0 + +You should see the following message: + +.. code-block:: console + + $ Hello World! arm + + +Debugging +========= + +Access gdb with the following make command: + +.. code-block:: console + + $ cd <openocd-stm32_path> + $ stm32_dbg l4 $ZEPHYR_BASE/samples/hello_world/outdir/disco_l475_iot1/zephyr.elf + +.. _Disco L475 IoT1 website: + http://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-eval-tools/stm32-mcu-eval-tools/stm32-mcu-discovery-kits/b-l475e-iot01a.html + +.. _STM32 Disco L475 IoT1 board User Manual: + http://www.st.com/resource/en/user_manual/dm00347848.pdf + +.. _STM32L475RG on www.st.com: + http://www.st.com/en/microcontrollers/stm32l475rg.html + +.. _STM32L475 reference manual: + http://www.st.com/resource/en/reference_manual/DM00031020.pdf |