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Custom Graphic LCD Characters
- Graphic displays are great for projects that require both text and pictures to be displayed, but the text can be difficult to read on displays that have a small pixel size. An easy solution is to utilize the custom character generator that is built into the Toshiba tc6963 controller to generate a font that is bolder than the characters generated by the internal CGROM. -
Added: 29-Aug-2003
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DAC Utilizing ADC
- Have you ever needed a DAC in your application? This Design Note explains a cool method to produce a DAC using only one ADC channel, an unused IO pin and two external components. -
Added: 29-Aug-2003
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Efficient Handling of RS-485 Timing Issues
- Anyone that has had to deal with the timing issues involved in RS-485 communication knows that it can often be a time-consuming task. Although RS-485 communications have the advantage of being able to support multiple devices all running of the same line and require only two wires for a connection, the communications are only half-duplex. This means that there can be some interesting timing issues to overcome when it comes to switching between receive and transmit modes. -
Added: 29-Aug-2003
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Efficient I/O handling with bitfields
- Bitfields provide a simple user interface, but can in many cases cause the compiler to generate inefficient code. This design note describes how to access each single bit in the AVR I/O registers with bitfields without any code overhead in the IAR icca90 family of compilers. Bitfields allow easy change of functionality of the I/O ports. -
Added: 29-Aug-2003
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Fast Look-up Table Driven 16-bit CRC Routine
- There are a few application notes around for 16-bit CRC (Cyclic Redundancy Check) calculating routines, but none are available in AVR assembler or are look-up table driven. The routine provided here is not only optimised in assembler but also uses a precalculated
look-up table for absolute CRC calculation speed! This 16-bit CRC is the same as used in XMODEM, YMODEM, and ZMODEM File Transfer Protocols. -
Added: 29-Aug-2003
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Frequency Synthesizer
- This Design Note explains a very neat way of generating an arbitrary frequency using the concept of Numeric Controlled Oscillator. The frequency can be controlled from a host PC through the UART interface. -
Added: 29-Aug-2003
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Getting Started with the STK100 under Windows 95/98/NT/2000
- This design note describes how to install the software requried for the AVR® development board STK100. It also describes how to verify the installation, how to upgrade the STK100 firmware, and finally how to test the programming of the device. -
Added: 29-Aug-2003
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I/O Port Details
- This document may help to shed some light on how the AVR input stages works. Hardware engineers may find it especially useful when designing and debugging their systems. -
Added: 29-Aug-2003
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