I really love tiny and bread board friendly boards, especially if they are very affordable and can be use with Eclipse based tools. So I was excited to see the NXP LPC845-BRK board to be available at Mouser, so I ended up ordering multiple boards right away. Why multiple? Because they only cost CHF 5.95 (around $6)!
The boards arrived yesterday, so it is a perfect timing to have them (and more of it) integrated into the next semester university course material. So you will probably see a few more tutorials for this board.
The kit comes in a solid card box with:
- the LPC845-BRK board
- two 10pin headers
- Micro USB cable
- a smalls screwdriver
- two 2pin jumpers and headers
- getting started reference card
The board works out of the box and does not need any soldering, and the headers are provided in case I want to customize the board. I like the fact that the headers are supplied, plus I’m free what I want to solder to the board. Plus I can use different headers if I want to. I was puzzled by the screwdriver (what for?) until I realized that there is small potentiometer on the board :-).
The main MCU on the board is the LPC845 in QFN48 package ( LPC845M301JBD4), an ARM Cortex-M0+, 30 MHz, 64 KB FLASH and 16 KB SRAM):
The board has a ‘break-apart’ touch area: if I don’t need it, I can make the board smaller. it includes a potentiometer, an RGB LED, three push buttons (Reset, user and ISP). Plus most important: the LPC11U35 acting as a debug probe:
I can use the LPC845 with an external debug probe: for this I have to solder a jumper plus the 2×5 header. All the three buttons can be used as user buttons, so technically there are three of them. There is as well a jumper for an ammeter to measure the current used.
Software and Tools
There is no dedicated MCUXpresso SDK for that board (yet?), so I have downloaded the one for the device from http://mcuxpresso.nxp.com/:
With drag&drop I added it to the NXP MCUXpresso IDE 10.3.0:
On the LPC845-BRK web site there is a zip file with examples which I have imported into the MCUXpresso IDE:
When plugged in, the board enumerates with a virtual COM port which is a gateway to the LPC845 UART:
I was able to debug the board out of the box, the board is recognized as CMSIS-DAP debug probe:
And voilà: I’m debugging it 🙂
I really like that board. It is of good quality with a lot of value. It has a on-board debugger and even the possibility to use it directly with a J-Link or P&E Multilink if I wish so. The board is small, can be hooked on a bread board and can be made even smaller with removing the touch pad. The Cortex-M0+ is not the fastest and biggest MCU on the planet, but provides enough processing power for many smaller applications. I plan to follow-up with more tutorials in the next days and weeks. Until then, see the tutorials listed in the Links section below.
List of articles about the LPC845-BRK board:
- Unboxing the NXP LPC845-BRK Board
- Tutorial: Using external Debug Probes with NXP LPC845-BRK Board
- Tutorial: Transforming the NXP LPC845-BRK into a CMSIS-DAP Debug Probe
- Tutorial: Blinky with the NXP LPC845-BRK Board
Happy BRKing 🙂
- LPC845-BRK Board web page: https://www.nxp.com/LPC845Breakout
- User Guide for LPC845-BRK Board: https://www.nxp.com/docs/en/user-guide/UM11181.pdf
- NXP LPC845 web page: https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/lpc-cortex-m-mcus/lpc800-series-cortex-m0-plus-mcus/low-cost-microcontrollers-mcus-based-on-arm-cortex-m0-plus-cores:LPC84X?
- List of community projects: https://community.nxp.com/community/lpc/blog/2019/02/02/lpc845-brk-board-projects
- Light intensity measurement using the new LPC845 Breakout Board: https://community.nxp.com/community/lpc/blog/2019/01/14/light-intensity-measurement-using-the-new-lpc845
- Accelerometer controlled LED for LPC845 Breakout using SDK drivers: https://community.nxp.com/community/lpc/blog/2019/01/14/accelerometer-controlled-led-using-sdk-drivers
- Controlling LPC845 Breakout Board LED brightness using SDK Drivers: https://community.nxp.com/community/lpc/blog/2019/01/14/control-on-board-led-brightness-using-sdk-drivers
- LPC845 I2C Co-processor: https://www.hackster.io/ktown/lpc845-i2c-co-processor-698c43
- Wooden Tower Motion/Audio Sensor: https://www.hackster.io/ktown/wooden-tower-motion-audio-sensor-8b81b7
- MCUXpresso SDK: http://mcuxpresso.nxp.com/
- MCUXpresso IDE: New NXP MCUXpresso IDE V10.3.0 Release