Tag Archives: LPC55S69

Standalone and Command Line Programmer with MCUXpresso

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The MCU-Link is a $10 CMSIS-DAP capable debug probe which works out-of-the box with the MCUXpresso Eclipse based IDE. This is great for development, but how can I programming with the push of a button or a script? The answer is no: there is an easy way to use the debug probe outside Eclipse from a shell script, and you can use that MCU-Link probe to do the job. This is especially useful as with the example below where I have to program 60 boards this week-end :-).

Programming Boards with MCU-Link using command line

Batch Programming Boards with MCU-Link

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New MCU-Link Debug Probe from NXP

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The NXP MCUXpressso IDE Release V11.2.1 gave a hint about a coming new debug probe, the MCU-Link which is available now:

MCU-Link debugging the LPC845-BRK Board

MCU-Link in 3D printed enclosure debugging the LPC845-BRK Board

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Using eInk display with LPC55S69 and OKdo E1 board

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I have continued to explore my two hobbies (embedded systems, and Talking About The Weather) during these weeks of lock-down. I have finally got to the point that my Weather Station project can sit on the window shelf of my office, and show me the temperature, humidity and atmospheric pressure on the attached eInk display.

weather station project: it is warm, cloudy and low pressure outside

In this blog I’m going to focus on driving that display.

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MCUXpresso SDK Tutorial – using I2C Driver on OKdo E1 board

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In an earlier tutorial I introduced using I2C with the NXP LPC55S69 on OKdo E1 board to read a Bosch BME280 environmental sensor on a Mikroe Weather Click board. The MCUXpresso Clocks, Pins and Peripheral Config tools were used to get it running. It’s all for my Weather Station project that I’ve been working on during these months of lockdown. It is starting to take shape – as you can see from the photograph:

From the left: Mikroe Weather Click, OKdo E1, Mikroe eInk Click.

Now I really need to start reading and writing to the BME280 sensor, and that means using the I2C driver in the lpcxpresso55s69 SDK. And so this week I’ll provide a forensic examination of the most commonly-used I2C function call.

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MicroTick (UTICK) Timer Tutorial with OKdo E1 board

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I want to share with you a little embedded trick that I use to improve the reliability of my code. And in addition to improving reliability, the technique can be used to schedule any event to occur ‘sometime in the future’. It uses the MicroTick (UTICK) timer found on the NXP LPC55S69 microcontroller, and could be applied to any device with a simple timer.

The MicroTick timer is an elegant, thing of beauty. But there is not a driver example built into the lpcxpresso55s69 SDK, and I believe that the timer is not widely used. That means we need a tutorial!

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First experience with OKdo E1 board

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This week I’m sharing my experience “getting started” with the OKdo E1 board. This board, featuring the NXP LPC55S69 150 MHz, dual Cortex M33 core microcontroller was a joy to use. OKdo have provided an online Getting Started guide, and I’ve field-tested this for you. My video tutorial recorded as I follow the guide is less than 7 minutes long… it may take you a little longer if you need to download MCUXpresso IDE or the lpcxpresso55s69 Software Development Kit (SDK) but I am confident that you will quickly have the board up-and-running.

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Fast. Easy. Tiny. Introducing OKdo’s E1 board

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I spend a lot of my time writing software to run on manufacturers’ evaluation (or development) boards. Here on Erich’s site, my blogs have been based on Cortex M33, using NXP’s LPC55S69-EVK and LPC55S16-EVK. Development boards are great – firstly you know that the suppliers’ software should run without issues, and secondly: many of the pin functions are brought out to headers, transceivers, codecs, switches and LEDs. So, whilst it is easy to get started, by definition the boards can be large physically, power hungry, and expensive.

What do you do if you need to embed a high performance microcontroller into your prototype or small production run and don’t have time (or the inclination) to spin out a PCB?

The answer is the OKdo E1 board, based on NXP’s LPC55S69 Cortex-M33 microcontroller.

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MCUXpresso IDE V11.1.0

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Right before Christmas 2019, NXP has released a new version of the MCUXpresso IDE, the version 11.1.0. This gave me time to explore it over the Christmas/New-Year break and evaluate it for the next university semester. There are several new features which will make my labs using it easier, so I plan to get the course material updated for it.

MCUXpresso IDE V11.1.0 Welcome Screen

MCUXpresso IDE V11.1.0 Welcome Screen

After the break you will find the highlights …

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Investigating ARM Cortex® M33 core – WiFi with Mikroe WiFi 10 click board

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For this last blog in the series Investigating ARM Cortex® M33 core I decided to explore the expansion features of the LPC55S69-EVK. This board has three expansion ports (PMOD, Arduino Duo, Mikroe click) and I picked the Mikroe expansion port. Why? Only because I had good experience with these boards with the Hexiwear project.

And because I have been doing some work this month with AWS IOT I wanted to get my LPC55S69-EVK onto my office WiFi network for the Christmas holidays. I know that the MCUXpresso SDK for lpcxpresso55s69 version 2.6.3 has a built-in WiFi example named qca_demo, and so that is what I am investigating today.

That WiFi example supports three WiFi shield boards, and I picked the Mikroe WiFi 10 click board. It’s part number MIKROE-3432 and available from all of the usual catalogue distributors.

WiFi 10 click board from Mikroelektronika
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