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This table summarises the features of Astrobe for Cortex-M3 included in each of the four available editions. Further details of the features can be found in the document titled "Oberon for Cortex-M3 Microcontrollers" which can be downloaded from the Oberon page, and in the on-line Help included in the Astrobe Evaluation Edition. 

Feature	Professional	Personal	Starter	Evaluation
Multi-file Editing Standard Windows, programmer-oriented, text-editing features Fast and responsive interactive operation Tabbed multi-document interface for editing multiple source files (modules) Split-screen editing Regular expression support in Find / Replace Bookmarks Line modification indicators Optional line numbers, printing features etc. etc. The module in the current window is the target of the compiler / linker /builder
Oberon Language-oriented Editing Automatic syntax colouring of language elements as you type  Auto-capitalisation of keywords as you type
Code Navigation Alphabetical auto-indexed  list of procedures. Click on the name to go to find the procedure in the source code. Auto-indexed list of imported modules. Click on the module name to open the file.
Language Features   Conforms to the 2011 Standard Oberon Language, including 32-bit IEEE REAL data type and operations Leaf procedures use registers for parameters and local variables for optimum performance Interrupt procedures Local dynamic array language extensions for safe memory allocation / deallocation Low-level SYSTEM functions GET, PUT, ADR and BIT for accessing the MCU control, status and peripheral registers
Fast Native-code Compilation  Fast single-pass modular compilation One-click to compile the module in the current window Only the current module needs to be compiled if the interfaces of imported modules are unchanged Pre-compiled symbol files are used for fast access to imported modules   Compilation continues to the end to find as many errors as possible Compilation errors are displayed in a separate window Click on an error line to take you to the actual line in the source
Linking / Building Automated Build feature identifies and recompiles all outdated modules before linking The names and locations of imported modules are already known at link time. There is no need to maintain separate 'make' files Interfaces of imported modules are validated at link time to ensure consistency and eliminate obscure runtime errors  The only user data required is the crystal frequency and type of Cortex-M3 target
Debugging and Error trapping Language support for validation of procedure parameters, pre- and post-conditions using assertions Automatic array index bounds checking Runtime library Out can be used to send trace output to a PC terminal emulator via UART0 Trapped runtime errors and failed assertions are identified by module name and source line number
Uploading and Running Compact and fast 32-bit native-code applications are created Integrated flash memory programmer using the bootloader of the target device via a COM / USB serial port No special hardware programming tool is required   Upload via LPC-Link for LPCXpresso boards Integrated terminal emulation facility to communicate with a running program on the target device  Standard hex-format files are also created if you prefer to program the target device using FlashMagic
Runtime and General Library Modules Initialisation code required by a Cortex-M3 application Formatted ASCII text output of chars, strings, integers and reals Serial input and output communication via UART0 32-bit Timer0 Microsecond and millisecond time measurement and delays Conversion of integer and real numbers to and from strings Memory allocation / deallocation for pointer variables Access to linker options  Support for 32-bit IEEE floating point add, subtract, multiply and divide
Additional Library Modules Definitions of register addresses for the LPC1343-,, LPC1347- and LPC1769 families of microcontrollers. Allows explicit software control of PMU, SCB, GPIO, UART, Timers, NVIC, I2C, SPI, SSP, SysTick Timer, Watchdog Timer, ADC, DAC etc. ADC - Analog to Digital convertor Clock - access the time components of the Real Time Clock   Graphics - device-independent drawing of lines, circles and ellipses I2C - Communicate with I2C devices: serial RAMs and EEPROMS, LCDs, accelerometers, temperature and pressure gauges, compasses etc. etc.  In-Application Programming (IAP) - On-chip Flash read and write Math - Mathematical and trigonometrical functions Random - Random number generation ResData - Resource data handling (constant data, images, fonts etc.) Serial Peripheral Interface (SPI) - Communicate with SPI devices: LCD displays, SD cards, 7-segment LEDs, and digital sensors such as accelerometers, magnetometers, etc. etc. Strings - General text string processing
Source Code Examples Example modules including full source code
Low-level SYSTEM Language Extensions Direct access to the special registers Program Counter (PC), Link Register (LNK), Stack Pointer (SP) and Frame pointer (FP) Byte-level addressing of all built-in and user-defined data types and structures Type casting
Max Program Size (Cortex-M3 Target-dependent) Code (Flash) Data (CPU SRAM) Maximum number of modules	512 KB  32 KB 256	128 KB  32 KB 128	32 KB  32 KB 32	32 KB  32 KB 32
Source Code of Library Modules Complete source code of all runtime and additional library modules (except the compiler-dependent MAU and FPU)
Commercial Applications Develop and deploy commercial applications with no additional runtime fees
Disassembler Display the ARM assembler instructions generated for a module
Command-line Compiler and Linker Compile and link applications using batch files, 3rd-party IDEs and build tools