Astrobe Forum

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...

The LPC2103 has 32kB of flash *ROM* (program code) but only 8kB of RAM (program data). The Memory Available 7140 shown in the Info example refers to what is left of the 8kb of RAM. Have a look at Section 6.5 "Memory Map" in Astrobe > Help > Oberon for LPC Microcontrollers to see how the memory is al...

Hi Frans-Pieter, Thank you for your positive feedback and suggestion. I'm pleased to hear you are making good progress. For now I've just created one new forum for any topics that are related to specific development boards. If large numbers of topics for a particular manufacturer start to appear I c...

Thank you for your compliments :) Although Oberon-07 was designed by Niklaus Wirth, the designer of Pascal there are a few fundamental differences. Hence, not only are reserved words capitals only, but also all other identifiers are case-sensitive. Wirth introduced this change when he designed the l...

The built-in ORD function will typecast a CHAR to INTEGER i.e. VAR ch: CHAR; i: INTEGER; ... ... i := ORD(ch); This gives you the corresponding numeric ASCII value for that character. Knowing this, if you want to convert a single character (e.g. '9') to the integer value (e.g. 9) you can then say: I...

cfbsoftware wrote:We'll post the updated I2C module here along with the EEPROM example.

These have now been uploaded to the Enhancements & Suggestions section of this forum.

The reference to CAT24LC256 will be removed. In the process of working on the 256Kbit EEPROM example we've added a couple of extra functions to the I2C module to give greater control over the parameters. You will be able to specify the number of bytes (including 0) for both the params and data param...

The EEPROM2K example supplied with Astrobe is designed for use with 2Kbit EEPROMs which use 8-bit location addresses. The 24LC256 is a 256Kbit EEPROM which uses 16-bit location addresses. Hence the variables idAddr and counterAddr need to be declared as 16-bit unsigned integer variables instead of 8...

That is not surprising - the related subject of type extensions is one of the more complex aspects of Oberon. Unfortuantely, I can't hope to explain it in a few sentences here. What I recommend you do is first of all have a look at the source code of the Extensions module in the Astrobe Examples fol...

Thank you for your feedback - much appreciated. There's a lot more to come if there is sufficient interest :) Niklaus Wirth has written a paper on the use of SETs titled "SET: A neglected data type and its compilation for the ARM". You can download a copy from: https://people.inf.ethz.ch/~wirth/Ober...