ATmega640V1280V1281V2560V2561V DATASHEET 4 2549QAVR022014 Figure 13. Pinout ATmega12812561 Note The large center pad underneath the QFNMLF. How To Program Atmega 1280' title='How To Program Atmega 1280' />Lisp. News u. Lisp now supports the Arduino Due, Arduino Zero, and Arduino MKRZerou. Lisp is now available for the SAMSAMD based Arduino Due, Arduino Zero, and Arduino MKRZero boards allowing you to take advantage of the extra memory and processor speeds provided by these boards. Lisp is a version of the Lisp programming language specifically designed to run on processors with a limited amount of RAM. It currently supports the ATmega based Arduino boards, SAMSAMD based Arduino boards, and MSP4. Launch. Pad boards. You can use exactly the same u. PonyProg a powerful but simple serial device programmer with a GUI framework for Linux and Windows. Image/2012/09/25/Fig_2(1).jpg' alt='How To Program Atmega 1280' title='How To Program Atmega 1280' />Lisp program, irrespective of the platform. Because u. Lisp is an interpreter you can type commands in, and see the effect immediately, without having to compile and download your program. This makes it an ideal environment for learning to program, or for setting up simple electronic devices. Lisp is a rich language, with many advanced features that make it easier to program in than C or C, so its ideal for learning about fundamental programming concepts. Its also an ideal language for expressing complex ideas, such as teaching a robot to solve mazes or finding the shortest route on a map. As well as supporting a core set of Lisp functions u. Lisp includes Arduino extensions, making it ideal as a control language for the Arduino. You can download the current version of u. Lisp free from the Download u. Lisp page. u. Lisp projects. Temperature sensor. Mood lightu. Lisp GSM server. Scrolling text display. Requirements. RAM At least 2 Kbytes. Program memory At least 3. Kbytes the program currently uses about 2. Kbytes of program memory on the Arduino and 3. Kbytes on the MSP4. EEPROM, flash, or FRAM memory Used for saving and loading the u. Lisp workspace. Recommended platforms. Arduino Uno or other ATmega. Java Delete File On Ftp Server. These will give you enough memory for a simple u. Lisp application using short symbol names for examples see Mood light, Simon game, and I2. C clock. Arduino Mega 2. ATmega. 25. 60 based boards. These will give you enough memory for a fairly complex application for examples see Animals, Tweetmaze, Route finder, and Infinite precision arithmetic. ATmega. 12. 84. Although there isnt an official Arduino board based on it, the ATmega. Kbytes RAM. Arduino Due. This board is based on the AT9. SAM3. X8. E ARM Cortex M3 core and provides 5. Kbytes of flash, 9. Kbytes of RAM, and an 8. MHz clock. Its currently the fastest u. Lisp platform. Arduino Zero. This board is based on the SAMD2. ARM Cortex M0 core and provides 2. Kbytes of flash and 3. Kbytes of RAM. Arduino MKRZero. This is similar to the Arduino Zero, based on the SAMD2. ARM Cortex M0 core and with 2. Kbytes of flash and 3. Kbytes of RAM. It incorporates an SD card socket, allowing you to use an SD card for saving and loading u. Lisp images. MSP4. F5. 52. 9 Launch. Pad. This uses the flash memory for saving images, and provides enough memory for a fairly complex application for examples see Animals, Tweetmaze, Route finder, and Infinite precision arithmetic. MSP4. 30 FR5. 96. Launch. Pad. This version uses the FRAM for the workspace, and for saving images, giving a generous amount of memory. The following table gives a summary of the different versions Platform. Processor. Long symbols. Cells. Image. GC time. Benchmark. Arduino Uno, Arduino Nano. ATmega. 32. 8No. 31. Arduino Mega 2. 56. ATmega. 25. 60. Yes. Tiny Lisp Computer. ATmega. 12. 84. Yes. Arduino Due. SAM3. X8. EYes. 10. 24. Arduino Zero. SAMD2. Yes. 30. 721. 2 msecs. Arduino MKRZero. SAMD2. Yes. 30. 72. 2 msecs. MSP4. 30 F5. 52. 9 Launch. Pad. MSP4. 30. F5. Yes. 12. 80. 12. 80. MSP4. 30 FR5. 96. Launch. Pad. MSP4. FR5. 96. 9 Yes. 33. Cells gives the number of Lisp cells of storage available, equivalent to 4 bytes 8 bytes on the SAMSAMD platforms. Image gives the number of cells that can be saved to non volatile storage using save image. On the Arduino Due, Zero, and MKRZero you can save images to an SD card. GC time gives the time taken for a garbage collection. Benchmark gives the time taken to run the tak benchmark see Benchmarks. I dont currently recommend the ATmega. U4 based boards as there is an unresolved problem interfacing u. Lisp via the serial interface with these boards. Specification. The language is generally a subset of Common Lisp, and u. Lisp programs should also run under Common Lisp. Types supported list, symbol, integer, string, and stream. An integer is a sequence of digits, optionally prefixed with or. Integers can be between 3. SAMSAMD platforms. You can enter numbers in hexadecimal, octal, or binary with the notations x. A, o. 52, or b. On platforms with more than 2 Kbytes of RAM arbitrary user defined symbol names are supported. Any sequence that isnt an integer can be used as a symbol so, for example, 1. On platforms with only 2 Kbytes symbol names can have up to three characters consisting of a z and 0 9. There is one namespace for functions and variables in other words, you cannot use the same name for a function and a variable. Lisp provides tail call optimization, so applications written using recursive functions can be as efficient as using iteration. Strings can consist of an arbitrary sequence of ASCII characters. Lisp includes a mark and sweep garbage collector. Garbage collection takes under 1 msec on an Arduino Uno or under 3 msec on an Arduino Mega 2. Lisp also includes a simple program editor see Using the program editor, a trace facility, and a pretty printer see Debugging in u. Lisp. Example. The following example illustrates how you might use u. Lisp. After uploading u. Lisp to your Arduino board or ATmega chip you communicate it via the Serial Monitor. For more information see Using u. Lisp. Suppose you have a red LED connected to the analogue output pin 9 on an Arduino Uno. Then you can type in the Lisp command analogwrite 9 1. LED to 1. 28, which corresponds to half brightness. To save having to write this command every time you want to set the red LED you can define a function called red defun red x analogwrite 9 xNow you can achieve the same effect simply by writing red 1. In each case the LED changes immediately, as soon as you type in the command. Suppose youve got a potentiometer connected to vary the voltage on the analogue input A0. You could define a function dim to make the potentiometer adjust the brightness of the LED with defun dim loop red analogread 0 4and run it by typing dimFinally, you could save the u. Lisp image to EEPROM, and specify that dim should be run on load, by entering save image dimWhen you reset the Arduino dim will now load and run automatically. This is a simple example showing how u. Lisp allows you to build up complex programs from simpler components, testing each of the components as you go along.