Tero's Arduino Blog

Using Arduino with Ada

Disqus comments disabled, and other changes

I have made few changes to the theme of the blog.

The biggest change is that I disabled the comments. There haven't been that many comments in general and in most cases it just adds some extra weight to the site.

If you wish to see the old comments ...


AVR-Ada and PN532, part 2: Mifare Classic, Yubikey NEO, I2C support

I continued tweaking my PN532 code and during the past few months I have added support for I2C interface, Mifare Classic tags (read-only), and Yubikey NEO keys (NFC Forum Type 4 interface).

PN532 and Arduino

I2C support means that you can use Adafruit PN532 Arduino Shield and normal Arduino UNO to run my ...


Read, write, and emulate NFC tags using Adafruit PN532 breakout board, Olimexino-328, and AVR-Ada

Recently, I have been playing with PN532 breakout board from Adafruit to read NFC tags and to communicate with NFC-enabled devices, like smart phones.

Adafruit's PN532 breakout board uses 3.3V voltage level and it is little tricky to use it with normal Arduino. So I ended up using ...


Driving Neopixel LEDs using only Ada

Inspired by my earlier delay experiments and its followup discussion on AVR-Ada mailinglist, I decided to put my delay functions in good use.

Neopixel RGB LEDs require exact timing and people usually use AVR assembler code to get the timing right. However, I wanted to see can I do it ...


Measuring the accuracy of delays in AVR-Ada

Saleae Logic cables to Arduino UNOr3

AVR-Ada provides basically two ways to delay the code execution.

One way is busy looping using Generic_Busy_Wait_Seconds and Generic_Wait_USecs procedures from the AVR.Wait package.

procedure My_Wait is new AVR.Wait.Generic_Busy_Wait_Seconds
  (Crystal_Hertz => 16_000_000);

procedure Wait_1000ms is new AVR.Wait.Generic_Wait_USecs
  (Crystal_Hertz => 16_000_000, Micro_Seconds => (1_000_000));

Another way is to use ...


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