ST STM32L496G Discovery¶
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:
Supported Features¶
The Zephyr stm32l496g_disco 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 |
SDMMC |
on-chip |
disk access |
SPI |
on-chip |
spi |
PWM |
on-chip |
pwm |
ADC |
on-chip |
adc |
Other hardware features are not yet supported on this Zephyr port.
The default configuration can be found in the defconfig file:
boards/arm/stm32l496g_disco/stm32l496g_disco_defconfig
Connections and IOs¶
STM32L496G Discovery Board has 8 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.
For mode 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)
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¶
Flashing¶
STM32L496G Discovery board includes an ST-LINK/V2-1 embedded debug tool interface. This interface is supported by openocd version v0.10.0, which has been available since Zephyr SDK v0.9.2.
Applications for the stm32l496g_disco board configuration can be
built and flashed in the usual way (see Building an Application
and Run an Application 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:
$ minicom -D /dev/ttyACM0
Then, build and flash in the usual way. Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b stm32l496g_disco samples/hello_world
west flash
You should see the following message on the console:
Hello World! arm
Debugging¶
You can debug an application in the usual way. Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b stm32l496g_disco samples/hello_world
west debug