B-L4S5I-IOT01A Discovery kit

Board Overview

B-L4S5I-IOT01A Discovery kit

Name:

b_l4s5i_iot01a

Vendor:

STMicroelectronics

Architecture:

arm

SoC:

stm32l4s5xx

Browse board sources

Overview

The B_L4S5I_IOT01A Discovery kit features an ARM Cortex-M4 based STM32L4S5VI MCU with a wide range of connectivity support and configurations. Here are some highlights of the B_L4S5I_IOT01A Discovery kit:

• STM32L4S5VIT6 microcontroller featuring 2 Mbyte of Flash memory, 640 Kbytes of RAM in LQFP100 package

• On-board ST-LINK/V2-1 supporting USB re-enumeration capability

• Three different interfaces supported on USB:

  • Virtual com port

  • Mass storage

  • Debug port

• ARDUINO ® Uno V3 and Pmod TM expansion connector

• 4 LEDs (2 for user, wifi, BLE)

• 2 push-buttons (user and reset)

• USB OTG FS with micro-AB connector

• Dynamic NFC tag

• 2 digital omnidirectional microphones

• Capacitive digital sensor for relative humidity and temperature

• Time-of-flight and gesture-detection sensors

• High-performance 3-axis magnetometer

• 3D accelerometer and 3D gyroscope

• 64-Mbit Quad-SPI Flash memory

• Bluetooth ® 4.1 module

• 802.11 b/g/n compliant Wi‐Fi ® module

• MCU current ammeter with 4 ranges and auto-calibration

• Flexible power supply options:

  • ST-LINK/V2-1

  • USB FS connector

  • External 5 V

More information about the board can be found at the B L4S5I IOT01A Discovery kit website.

Hardware

The STM32L4S5VI SoC provides the following hardware features:

• Ultra-low-power with FlexPowerControl (down to 130 nA Standby mode and 100 uA/MHz run mode)

• Core: ARM® 32-bit Cortex®-M4 CPU with FPU, frequency up to 120 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 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors

• 16x timers:

  • 2x 16-bit advanced 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 83 fast I/Os, most 5 V-tolerant

• Memories

  • Up to 2 MB Flash, 2 banks read-while-write, proprietary code readout protection

  • Up to 640 KB of SRAM including 32 KB with hardware parity check

  • External memory interface for static memories supporting SRAM, PSRAM, NOR and NAND memories

  • Octo SPI memory interface

• 4x digital filters for sigma delta modulator

• Rich analog peripherals (independent supply)

  • 1x 12-bit ADC 5 MSPS, up to 16-bit with hardware oversampling, 200 uA/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)

  • 4x 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

  • SDMMC I/F

  • DCMI camera interface

• 14-channel DMA controller with multiplex request router

• True random number generator

• CRC calculation unit, 96-bit unique ID

• AES and HASH hardware accelerators

• Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™

More information about STM32L4S5VI can be found here:

• STM32L4S5VI on www.st.com

• STM32L4S5 reference manual

Supported Features

The b_l4s5i_iot01a board supports the hardware features listed below.

on-chip / on-board

Feature integrated in the SoC / present on the board.

2 / 2

Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.

vnd,foo

Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

b_l4s5i_iot01a

/

stm32l4s5xx

b_l4s5i_iot01a@/stm32l4s5xx target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M4F CPU1	arm,cortex-m4f
ADC	on-chip	STM32 ADC2	st,stm32-adc
Bluetooth	on-board	STMicroelectronics SPI protocol V1 compatible with BlueNRG-MS devices1	st,hci-spi-v1
CAN	on-chip	STM32 CAN controller1	st,stm32-bxcan
Clock control	on-chip	STM32 RCC (Reset and Clock controller)1	st,stm32-rcc
	on-chip	STM32 HSE Clock1	st,stm32-hse-clock
	on-chip	Generic fixed-rate clock provider3	fixed-clock
	on-chip	STM32 MSI Clock1	st,stm32-msi-clock
	on-chip	STM32 LSE Clock1	st,stm32-lse-clock
	on-chip	STM32L4/L5 main PLL1	st,stm32l4-pll-clock
	on-chip	STM32 Microcontroller Clock Output (MCO)1	st,stm32-clock-mco
Counter	on-chip	STM32 counters9	st,stm32-counter
Cryptographic accelerator	on-chip	STM32L4 AES Accelerator1	st,stm32l4-aes
DAC	on-chip	STM32 family DAC1	st,stm32-dac
DMA	on-chip	STM32 DMA controller (V2)1 1	st,stm32-dma-v2
	on-chip	STM32 DMAMUX controller1	st,stm32-dmamux
Flash controller	on-chip	STM32 Family flash controller1	st,stm32-flash-controller
	on-board	STM32 OSPI Flash controller supporting the JEDEC CFI interface1	st,stm32-ospi-nor
GPIO & Headers	on-chip	STM32 GPIO Controller9	st,stm32-gpio
	on-board	GPIO pins exposed on Arduino Uno (R3) headers1	arduino-header-r3
I2C	on-chip	STM32 I2C V2 controller2 2	st,stm32-i2c-v2
Input	on-board	Group of GPIO-bound input keys1	gpio-keys
Interrupt controller	on-chip	ARMv7-M NVIC (Nested Vectored Interrupt Controller)1	arm,v7m-nvic
	on-chip	STM32 External Interrupt Controller1	st,stm32-exti
LED	on-board	Group of GPIO-controlled LEDs1	gpio-leds
Memory controller	on-chip	STM32 Battery Backed RAM1	st,stm32-bbram
MMC	on-chip	STM32 SDMMC Disk Access1	st,stm32-sdmmc
MTD	on-chip	STM32 flash memory1	st,stm32-nv-flash
	on-board	Fixed partitions of a flash (or other non-volatile storage) memory2	fixed-partitions
OCTOSPI	on-chip	STM32 OSPI Controller1 1	st,stm32-ospi
PHY	on-chip	This binding is to be used by all the usb transceivers which are built-in with USB IP1	usb-nop-xceiv
Pin control	on-chip	STM32 Pin controller1	st,stm32-pinctrl
Power management	on-chip	STM32 power controller1	st,stm32-pwr
PWM	on-chip	STM32 PWM1 9	st,stm32-pwm
Reset controller	on-chip	STM32 Reset and Clock Control (RCC) Controller1	st,stm32-rcc-rctl
RNG	on-chip	STM32 Random Number Generator1	st,stm32-rng
RTC	on-chip	STM32 RTC1	st,stm32-rtc
Sensors	on-board	STMicroelectronics LIS3MDL magnetometer1	st,lis3mdl-magn
	on-board	STMicroelectronics HTS221 humidity and temperature sensor on I2C bus1	st,hts221
	on-board	STMicroelectronics LPS22HB pressure sensor1	st,lps22hb-press
	on-board	STMicroelectronics LSM6DSL 6-axis accelerometer and gyrometer accessed through I2C bus1	st,lsm6dsl
	on-board	STMicroelectronics VL53L0X Time of Flight sensor1	st,vl53l0x
	on-chip	STM32 family TEMP node for production calibrated sensors with two calibration temperatures1	st,stm32-temp-cal
	on-chip	STM32 VREF+1	st,stm32-vref
	on-chip	STM32 VBAT1	st,stm32-vbat
Serial controller	on-chip	STM32 USART1 2	st,stm32-usart
	on-chip	STM32 LPUART1	st,stm32-lpuart
	on-chip	STM32 UART2	st,stm32-uart
SMbus	on-chip	STM32 SMBus controller4	st,stm32-smbus
SPI	on-chip	STM32 SPI controller with embedded Rx and Tx FIFOs2 1	st,stm32-spi-fifo
SRAM	on-chip	Generic on-chip SRAM1	mmio-sram
Timer	on-chip	ARMv7-M System Tick1	arm,armv7m-systick
	on-chip	STM32 timers1 10	st,stm32-timers
	on-chip	STM32 low-power timer (LPTIM)2	st,stm32-lptim
USB	on-chip	STM32 OTGFS controller1	st,stm32-otgfs
Watchdog	on-chip	STM32 watchdog1	st,stm32-watchdog
	on-chip	STM32 system window watchdog1	st,stm32-window-watchdog
Wi-Fi	on-board	es-WiFi module1	inventek,eswifi

Connections and IOs

B_L4S5I_IOT01A Discovery kit has 9 GPIO controllers (from A to I). These controllers are responsible for pin muxing, input/output, pull-up, etc.

For more details please refer to B L47S5I IOT01A board User Manual.

Default Zephyr Peripheral Mapping:

• UART_1 TX/RX : PB6/PB7 (ST-Link Virtual Port Com)

• UART_4 TX/RX : PA0/PA1 (Arduino Serial)

• I2C1 SCL/SDA : PB8/PB9 (Arduino I2C)

• I2C2 SCL/SDA : PB10/PB11 (Sensor I2C bus)

• SPI1 NSS/SCK/MISO/MOSI : PA2/PA5/PA6/PA7 (Arduino SPI)

• SPI3 SCK/MISO/MOSI : PC10/PC11/PC12 (BT SPI bus)

• PWM_2_CH1 : PA15

• LD1 : PA5

• LD2 : PB14

• user button : PC13

System Clock

B_L4S5I_IOT01A 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

B_L4S5I_IOT01A Discovery kit has 4 U(S)ARTs. The Zephyr console output is assigned to UART1. Default settings are 115200 8N1.

Programming and Debugging

The b_l4s5i_iot01a board supports the runners and associated west commands listed below.

	flash	debug	attach	rtt	debugserver
jlink	✅	✅	✅	✅	✅
openocd	✅	✅ (default)	✅	✅	✅
stm32cubeprogrammer	✅ (default)

B_L4S5I_IOT01A Discovery kit includes an ST-LINK/V2-1 embedded debug tool interface.

Flashing

The board is configured to be flashed using west STM32CubeProgrammer runner, so its installation is required.

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

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

Flashing an application to B_L4S5I_IOT01A Discovery kit

Connect the B_L4S5I_IOT01A Discovery kit 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 b_l4s5i_iot01a 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 b_l4s5i_iot01a samples/hello_world
west debug