Astrobe Forum

In the last couple of weeks we have been investigating the changes required to conform to the 2011 Revision of the Oberon-07 report and have already implemented one or two in the development version of the compiler. We plan to replace support for the 2008 language definition with the 2011 language d...

The value of m must be less than n when you use a SET range {m .. n} i.e. m .. n is a shorthand for m, m+1, ... , n-1, n. Currently the compiler does not object but as a result of this report we will modify it so that it reports an error message when this error is detected in the future. When I chan...

Post your message again with the original code formatting preserved - it's difficult to comprehend without it. To preserve the formatting, select your code after pasting it into your message and click on the 'Code' pushbutton beneathe the Subject line. If you do that, instead of: IF (PLLCBit IN bits...

Good idea - something we have recently been looking for ourselves. In the meantime, if you are using Windows 7 try the standard Calculator application. It has been enhanced to include a programmer's mode which gives you those conversions.

Yes. This is also specified in section 7.7 "VIC Usage Notes" in UM10139: Also, before the next interrupt can be serviced, it is necessary that write is performed into the VICVectAddr register before the return from interrupt is executed. This write will clear the respective interrupt flag in the int...

Arrays and records in ARM Oberon-07 are allocated memory in multiples of four bytes. You can use SYSTEM.SIZE to find out how much storage each data type occupies. e.g. SYSTEM.SIZE(ZAP) returns 20 (12 + 4 + 4). If you are reading data from a binary file created on another system you will need to trea...

Hi, please could you show me a code example for testing the state of a single input pin? For examples see the discussion reading status inport in the Development Boards section of this forum: http://www.astrobe.com/forum/viewtopic.php?f=7&t=60 While I'm at it, it would be very helpfull to have exam...

Yes - of course. Sorry about the blooper! With the benefit of hindsight, it might be clearer to write it as two separate statements: R := LSL(value, 16); R := LSR(R, 22); If this form is used in a leaf procedure you do not need to worry about efficiency as it generates code which is identical to the...

If you want to typecast an INTEGER variable to a SET variable use the general typecasting function SYSTEM.VAL. e.g. VAR s: SET; i: INTEGER; s := SYSTEM.VAL(SET, i); Examples: i = 0, s = {} i = 8, s = {3} i = 0FH, s = {0..3} i = 0AAH, s = {1, 3, 5, 7} i = 055H, s = {0, 2, 4, 6} Note that this doesn't...