| Archive Article Arduino Program Timing By Ed Nisley
Ed Nisely explains how output pulses can reveal the progress of invisible firmware routines. After presenting a straightforward way to instrument your code, he covers the detailed timing produced by Arduino statements and functions. He writes:
While writing the Arduino program for the RGB LED lights mentioned in my May column (Circuit Cellar 310), I wondered how much time the floating-point trigonometric calculations required. Rather than wrap a software measurement around the code, I added a pair of instructions to flip an output bit, then watched the results on an oscilloscope. It's a classic technique that helps you debug software when there's no other way to see what's going on inside your code or when elaborate tracing routines will disturb the firmware's normal operation.
In this column, I'll show a simple way to instrument your code, then take a look at the detailed timing produced by Arduino statements and functions. You'll need an oscilloscope or logic analyzer for this technique, but even the least-expensive instruments will suffice. |
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Sponsored by Matrix TSL Flowcode 7 (Article 2)
Displays in Flowcode In the first part of this article series, you were introduced to Flowcode 7, a flowchart-driven electronic IDE that enables you to produce hex code for more than 1,300 different microcontrollers, including PIC8, PIC16, PIC32, AVR, Arduino, and ARM. In the second free article, embedded engineer Ben Rowland gets you working with displays in Flowcode. He covers: communicating with displays, code and display porting, a bitmap drawer component, and more. Read the Article
Want a Free Trial and/or Buy Flowcode 7? Download Now
Flowcode is an IDE for electronic and electromechanical system development. Pro engineers, electronics enthusiasts, and academics can use Flowcode to develop systems for control and measurement based on microcontrollers or on rugged industrial interfaces using Windows-compatible personal computers.
Visit www.flowcode.co.uk/circuitcellar to learn about Flowcode 7. You can access a free version, or you can purchase advanced features and professional Flowcode licenses through the modular licensing system. If you make a purchase through that page, Circuit Cellar will receive a commission. |
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Current Issue - See Inside
Circuit Cellar #316 November 2016
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Q&A: The PCB Artist | All About Analog ASICs Continued | The BalanceBot Project | Simple Display Solution | DIY Wearable Synthesizer | Adaptive Sprinting | Contactless Measurement Options | Arduino Program Timing | Powerless Display Technology Continued | The Future of Ultra-Low Power Signal Processing | And More
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Circuit Cellar is a media company that serves the international embedded design community with its products and services. As a reliable content provider for professional engineers and programmers, Circuit Cellar publishes Circuit Cellar magazine, engineering/programming-related books, a website, and a newsletter. Circuit Cellar also manages international design challenges relating to embedded design and programming.
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