im880b

Caution

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Tip

When using this board with RIOT, set the BOARD variable to im880b 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 ?= im880b

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

include $(RIOTBASE)/Makefile.include

Support for the im880b with stm32l151cb-a

Hardware

MCU

MCU	stm32l151cb-a
Family	ARM Cortex-M3
Vendor	ST Microelectronics
RAM	16KiB
Flash	128KiB
Frequency	32MHz (no external oscillator connected)
FPU	no
Timers	10 (8x 16-bit, 2x watchdog timers)
ADCs	1x 24-channel 12-bit
UARTs	3
SPIs	2
I2Cs	2
Vcc	1.65V - 3.6V
Datasheet	Datasheet
Reference Manual	Reference Manual
Programming Manual	Programming Manual
Board Manual	Board Manual

User Interface

Flashing

As no usb connector is present on the device an external programmer must be connected to the board for flashing. You can use JTAG or STLINK programmer.

• JTAG:

• • JTDO: PB_3 / P39
• • JTDI: PA_15 / P38
• • JTCK: PA_14 / P37
• • JTMS: PA_13 / P34

• STLINK:

• • NRST: NRST / P7
• • SWCLK: PA_14 / P37
• • SWDAT: PA_13 / P34

STM32 Loader

To flash RIOT on the board, after connecting the UART-USB bridge, just run:

BOARD=im880b make flash

This uses the stm32loader script to erase the memory and flash it interfacing with the STM32 ROM bootloader.

Connecting via Serial

The default UART port is the USART1, there is no usb connection a USB/TTL converter must be used to connect to the board TX & RX pins. The default port is /dev/ttyUSB0. The pin connections are:

• USART1:
• • TX: PA_9 / P30
• • RX: PA_10 / P31

BOARD=im880b make term

SX1272 radio

Please note that the board has a Semtech SX1272 radio. This means that when the semtech-loramac package or the sx127x driver are used the correct driver version (sx1272) must be selected.