RM1xx DVK
Overview
Ezurio’s RM1xx is a module which integrates both LoRa and BLE communications, powered by a Nordic Semiconductor nRF51822 ARM Cortex-M0 CPU and on-board Semtech SX1272 LoRa RF chip. This board supports the RM1xx on the RM1xx development board - RM191 for the 915MHz version and RM186 for the 868MHz version.
This development kit has the following features:
ADC
CLOCK
FLASH
GPIO
I2C
NVIC
PWM
RADIO (Bluetooth Low Energy)
RTC
Segger RTT (RTT Console)
SPI
UART
WDT
RM1xx module (Credit: Ezurio)
More information about the module can be found on the RM1xx homepage [1].
The Nordic Semiconductor Infocenter [2] contains the processor’s information and the datasheet.
Hardware
The RM1xx has two internal oscillators. The frequency of the slow clock is 32.768KHz. The frequency of the main clock is 16MHz.
Supported Features
The rm1xx_dvk 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.
rm1xx_dvk/nrf51822 target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M0 CPU1 |
|
ADC |
on-chip |
nRF ADC node1 |
|
ARM architecture |
on-chip |
Nordic UICR (User Information Configuration Registers)1 |
|
on-chip |
Nordic nRF family MPU (Memory Protection Unit)1 |
||
on-chip |
Nordic nRF family SWI (Software Interrupt)6 |
||
Clock control |
on-chip |
Nordic nRF clock control node1 |
|
Comparator |
on-chip |
Nordic nRF LPCOMP (analog Low-Power COMParator)1 |
|
Counter |
on-chip |
Nordic nRF timer node3 |
|
Cryptographic accelerator |
on-chip |
Nordic ECB (AES electronic codebook mode encryption)1 |
|
on-chip |
Nordic nRF family CCM (AES CCM mode encryption)1 |
||
Flash controller |
on-chip |
Nordic NVMC (Non-Volatile Memory Controller)1 |
|
GPIO & Headers |
on-chip |
NRF5 GPIOTE1 |
|
on-chip |
NRF5 GPIO1 |
||
I2C |
on-chip |
||
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
ARMv6-M NVIC (Nested Vectored Interrupt Controller) controller1 |
|
LoRa |
on-board |
Semtech SX1272 LoRa Modem1 |
|
Miscellaneous |
on-chip |
Nordic FICR (Factory Information Configuration Registers)1 |
|
on-chip |
Nordic nRF family PPI (Programmable Peripheral Interconnect)1 |
||
MTD |
on-board |
Properties supporting Zephyr spi-nor flash driver (over the Zephyr SPI API) control of serial flash memories using the standard M25P80-based command set1 |
|
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory2 |
||
on-chip |
Flash node1 |
||
Networking |
on-chip |
Nordic nRF family RADIO peripheral1 |
|
Pin control |
on-chip |
The nRF pin controller is a singleton node responsible for controlling pin function selection and pin properties1 |
|
Power management |
on-chip |
Nordic nRF power control node1 |
|
PWM |
on-chip |
nRFx S/W PWM1 |
|
Retained memory |
on-chip |
Nordic GPREGRET (General Purpose Register Retention) device1 |
|
RNG |
on-chip |
Nordic nRF family RNG (Random Number Generator)1 |
|
RTC |
on-chip |
Nordic nRF RTC (Real-Time Counter)2 |
|
Sensors |
on-chip |
Nordic nRF family TEMP node1 |
|
on-chip |
Nordic nRF quadrature decoder (QDEC) node1 |
||
Serial controller |
on-chip |
Nordic nRF family UART1 |
|
SPI |
on-chip |
||
SRAM |
on-chip |
Generic on-chip SRAM description1 |
|
Watchdog |
on-chip |
Nordic nRF family WDT (Watchdog Timer)1 |
See Nordic Semiconductor Infocenter [2] for a complete list of hardware features.
Connections and IOs
The development board features a Microchip MCP23S08 SPI port expander - note that this is not currently supported in Zephyr.
Refer to the Microchip MCP23S08 datasheet [5] for further details.
Internal Memory
EEPROM Memory
A 512KB (4Mb) Adesto AT25DF041B EEPROM is available via SPI for storage of infrequently updated data and small datasets and can be used with the spi-nor driver. Note that the EEPROM shares the same SPI bus as the SX1272 LoRa transceiver so priority access should be given to the LoRa radio.
Refer to the Adesto AT25DF041B datasheet [3] for further details.
LoRa
A Semtech SX1272 transceiver chip is present in the module which can be used in 915MHz LoRa frequency ranges if using an RM191 module or 868MHz LoRa frequency ranges if uses an RM186 module
Refer to the Semtech SX1272 datasheet [4] for further details.
Programming and Debugging
Flashing
Follow the instructions in the Nordic nRF5x Segger J-Link page to install and configure all the necessary software. Further information can be found in Flashing. Then build and flash applications as usual (see Building an Application and Run an Application for more details).
Here is an example for the Hello World application.
First, run your favorite terminal program to listen for output.
$ minicom -D <tty_device> -b 115200
Replace <tty_device> with the port where the board nRF51 DK
can be found. For example, under Linux, /dev/ttyACM0.
Then build and flash the application in the usual way.
# From the root of the zephyr repository
west build -b rm1xx_dvk samples/hello_world
west flash
Debugging
Refer to the Nordic nRF5x Segger J-Link page to learn about debugging boards with a Segger IC.