LimiFrog Version 1

Caution

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Tip

When using this board with RIOT, set the BOARD variable to limifrog-v1 in your Makefile. If you follow the standard RIOT project structure, your Makefile should look like this:

./Makefile

# name of your application
APPLICATION = hello-world

# Change this to your board if you want to build for a different board
BOARD ?= limifrog-v1

# This has to be the absolute path to the RIOT base directory:
RIOTBASE ?= $(CURDIR)/RIOT

include $(RIOTBASE)/Makefile.include

Support for the limifrog-v1 board

Overview

LimiFrog-v1 arose from the La BlueFrog board. LimiFrog-v1 contains the first hardware revision of that kickstarter project. LimiFrog-v2 is already there and the RIOT support will follow. LimiFrog features a variety of sensors as well as an OLED Display and a BLE (Bluetooth Low-Energy) module.

Hardware

MCU

MCU	STM32L151RC
Family	ARM Cortex-M3
Vendor	ST Microelectronics
RAM	32KiB
Flash	256KiB
Frequency	32MHz (no external oscillator connected)
FPU	no
Timers	8 (8x 16-bit, 1x 32-bit [TIM5])
ADCs	1x 42-channel 12-bit
UARTs	3
SPIs	2
I2Cs	2
Vcc	1.65V - 3.6V
Datasheet	Datasheet
Reference Manual	Reference Manual
Programming Manual	Programming Manual

User Interface

2 Buttons:

PIN
PA15 (IN)
PC8 (IN)

1 LED:

NAME	LED_RED
Color	red
Pin	PC3

Implementation Status

Device	ID	Supported	Comments
MCU	STM32L151RC	partly	Energy saving modes not fully utilized
Low-level driver	GPIO	yes
	PWM	yes
	UART	yes
	I2C	yes
	SPI	yes
	Timer	yes
Ambient Light Sensor	ST VL6180X	no	planned
Accelerometer	ST LSM6DS3	no	planned
Magnetometer	ST LIS3MDL	no	planned
Gyroscope	ST LSM6DS3	no	planned
atmospheric pressure (and altitude) sensor	ST SLPS25H	no	planned
Microphone	Knowles SPU0414HR5H-SB	no	planned
OLED Display	Densitron DD-160128FC-1A	no	planned
BLE	Panasonic PAN1740	no	planned

Flashing and Debugging the device

The LimiFrog-v1 has no on-board programmer nor an USB-UART converter. It can be programmed by using the integrated ST-Link/V2 programmer of any STM32Fx- discovery board. See the Hardware subsection in Flashing and Debugging section here for an example. Another way is to use a stand-alone ST-Link V2 programmer as shown in the picture.

To debug the device you may also want to use a stand-alone UART converter and connect it to the pins PC10 and PC11 and keep the programmer plugged.