.. zephyr:board:: stm32l496g_disco

Overview

The STM32L496G Discovery board features an ARM Cortex-M4 based STM32L496AG MCU with a wide range of connectivity support and configurations. Here are some highlights of the STM32L496G Discovery board:

STM32L496AGI6 microcontroller featuring 1 Mbyte of Flash memory and 320 Kbytes of RAM in an UFBGA169 package
1.54 inch 240 x 240 pixel-TFT color LCD with parallel interface
SAI Audio CODEC, with a stereo headset jack, including analog microphone input
Stereo digital MEMS microphones
microSD card connector (card included)
Camera 8 bit-connector
8 Mbit-PSRAM
IDD measurement
64 Mbit-Quad-SPI Flash
USB OTG FS with Micro-AB connector
Two types of extension resources:
- STMod+ and PMOD connectors
- Compatible Arduino* Uno V3 connectors
On-board ST-LINK/V2-1 debugger/programmer with SWD connector
5 source options for power supply
- ST-LINK/V2-1 USB connector
- User USB FS connector
- VIN from Arduino connector
- 5 V from Arduino connector
- USB charger
- USB VBUS or external source(3.3V, 5V, 7 - 12V)
- Power management access point
8 LEDs
Reset push button
4 direction-joystick with selection

More information about the board can be found at the STM32L496G Discovery website_.

Hardware

The STM32L496AG SoC provides the following hardware capabilities:

Ultra-low-power with FlexPowerControl (down to 108 nA Standby mode and 91 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)
- Internal 48 MHz with clock recovery
- 3 PLLs for system clock, USB, audio, ADC
RTC with HW calendar, alarms and calibration
LCD 8 x 40 or 4 x 44 with step-up converter
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 136 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
- 320 KB of SRAM including 64 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
20x communication interfaces
- USB OTG 2.0 full-speed, LPM and BCD
- 2x SAIs (serial audio interface)
- 4x I2C FM+(1 Mbit/s), SMBus/PMBus
- 5x USARTs (ISO 7816, LIN, IrDA, modem)
- 1x LPUART
- 3x SPIs (4x SPIs with the Quad SPI)
- 2x CAN (2.0B Active) and SDMMC interface
- SWPMI single wire protocol master I/F
- IRTIM (Infrared interface)
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 STM32L496AG can be found in:

STM32L496AG on www.st.com_
STM32L496 reference manual_

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

STM32L496G Discovery Board has 8 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.

For more details please refer to STM32L496G Discovery board User Manual_.

Default Zephyr Peripheral Mapping:

UART_1 TX/RX : PB6/PG10
UART_2 TX/RX : PA2/PD6 (ST-Link Virtual Port Com)
LPUART_1 TX/RX : PG7/PG8 (Arduino Serial)
I2C1 SCL/SDA : PB8/PB7 (Arduino I2C)
SDMMC_1 D0/D1/D2/D3/CK/CMD: PC8/PC9/PC10/PC11/PC12/PD2
SPI1 NSS/SCK/MISO/MOSI : PA15/PA5/PB4/PB5 (Arduino SPI)
USB DM/DP/ID : PA11/PA12/PA10
I2C_1_SCL : PB8
I2C_1_SDA : PB7
PWM_2_CH1 : PA0
LD2 : PB13

System Clock

STM32L496G Discovery System Clock could be driven by an internal or external oscillator, as well as the main PLL clock. By default the System clock is driven by the PLL clock at 80MHz, driven by 16MHz high speed internal oscillator.

Serial Port

STM32L496G Discovery board has 5 U(S)ARTs. The Zephyr console output is assigned to UART2. Default settings are 115200 8N1.

Programming and Debugging

.. zephyr:board-supported-runners::

STM32L496G Discovery board includes an ST-LINK/V2-1 embedded debug tool interface.

Flashing

The board is configured to be flashed using west STM32CubeProgrammer_ runner, so its :ref:installation <stm32cubeprog-flash-host-tools> is required.

Alternatively, OpenOCD or JLink can also be used to flash the board using the --runner (or -r) option:

.. code-block:: console

$ west flash --runner openocd $ west flash --runner jlink

Applications for the stm32l496g_disco board configuration can be built and flashed in the usual way (see :ref:build_an_application and :ref:application_run for more details).

Flashing an application to STM32L496G Discovery

Connect the STM32L496G Discovery to your host computer using the USB port, then run a serial host program to connect with your Discovery board. For example:

.. code-block:: console

$ minicom -D /dev/ttyACM0

Then, build and flash in the usual way. Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: stm32l496g_disco :goals: build flash

You should see the following message on the console:

.. code-block:: console

Hello World! arm

Debugging

You can debug an application in the usual way. Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: stm32l496g_disco :maybe-skip-config: :goals: debug

.. _STM32L496G Discovery website: https://www.st.com/en/evaluation-tools/32l496gdiscovery.html

.. _STM32L496G Discovery board User Manual: https://www.st.com/resource/en/user_manual/dm00353127.pdf

.. _STM32L496AG on www.st.com: https://www.st.com/en/microcontrollers/stm32l496ag.html

.. _STM32L496 reference manual: https://www.st.com/resource/en/reference_manual/DM00083560.pdf

.. _STM32CubeProgrammer: https://www.st.com/en/development-tools/stm32cubeprog.html