Search found 105 matches
- Sat May 18, 2024 10:53 am
- Forum: Cortex-M0, M3, M4 and M7
- Topic: RP2040: Library & Tools for Astrobe Available
- Replies: 11
- Views: 10791
Re: RP2040: Library & Tools for Astrobe Available
Latest updates and changes: https://oberon-rtk.org/description/changes-2024-05-17/ I have taken a first stab at the RP2040's SPI device. There's a corresponding new example program: https://oberon-rtk.org/examples/spirtc/. It uses the Maxim DS3234 real-time clock as test peripheral. GitHub repo: htt...
- Sat May 18, 2024 9:09 am
- Forum: Bug Reports
- Topic: SET Parameter Problem
- Replies: 2
- Views: 6507
Re: SET Parameter Problem
I have just encountered this problem again, using Astrobe for Cortex-M0 v9.2, where it is partly fixed, but not for all use cases. Just to document in case someone else runs into this as well, here's the test code. MODULE M; VAR i0: INTEGER; r0: RECORD k, i: INTEGER END; a0: ARRAY 2 OF INTEGER; PROC...
- Thu May 16, 2024 2:09 am
- Forum: Astrobe for ARM Cortex-M0, M3, M4 and M7
- Topic: Alert: no free registers Question
- Replies: 1
- Views: 91
Alert: no free registers Question
The following test code is distilled from a real use case. This is with Astrobe for Cortex-M0 v9.2. MODULE M; VAR v0: INTEGER; PROCEDURE p0(i0, i1, i2, i3, i4, i5: INTEGER; i6: INTEGER; b7: BOOLEAN); END p0; PROCEDURE p1(i0, i1, i2, i3, i4, i5: INTEGER; b6: BOOLEAN; i7: INTEGER); END p1; PROCEDURE p...
- Mon May 06, 2024 10:51 am
- Forum: Cortex-M0, M3, M4 and M7
- Topic: RP2040: Library & Tools for Astrobe Available
- Replies: 11
- Views: 10791
Re: RP2040: Library & Tools for Astrobe Available
Latest update: https://oberon-rtk.org/description/changes-2024-05-05/ Concepts and test code exploring and evaluating the use of trap exception handlers as means to grant exclusive mutating access to shared data, or other protected functionality or hardware: https://oberon-rtk.org/examples/traphandl...
- Fri May 03, 2024 3:07 pm
- Forum: Astrobe for ARM Cortex-M0, M3, M4 and M7
- Topic: Exception Handlers: Save/Restore r4 to r7 with SYSTEM.LDREG
- Replies: 2
- Views: 287
Re: Exception Handlers: Save/Restore r4 to r7 with SYSTEM.LDREG
Oops! Seems I was so impressed by the optimisation that I had blanked out the last part. :)
- Fri May 03, 2024 1:44 am
- Forum: Astrobe for ARM Cortex-M0, M3, M4 and M7
- Topic: Procedure Calling Convention
- Replies: 1
- Views: 313
Procedure Calling Convention
The ARM Architecture Procedure Call Standard (AAPCS) stipulates that, upon calling a procedure 1) registers r0 to r3, and r12, are "caller saved", ie. the called procedure is free to mutate them. 2) registers r4 to r11 are "callee saved", ie. the called procedure must save and restore these register...
- Fri May 03, 2024 1:27 am
- Forum: Astrobe for ARM Cortex-M0, M3, M4 and M7
- Topic: Exception Handlers: Save/Restore r4 to r7 with SYSTEM.LDREG
- Replies: 2
- Views: 287
Exception Handlers: Save/Restore r4 to r7 with SYSTEM.LDREG
Compiling this exception handler PROCEDURE h[0]; BEGIN SYSTEM.LDREG(4, 13) END h; generates this code PROCEDURE h[0]; BEGIN . 1584 0630H 0B500H push { lr } SYSTEM.LDREG(4, 13) END h; . 1586 0632H 0200DH movs r0,#13 . 1588 0634H 04604H mov r4,r0 . 1590 0636H 0BD00H pop { pc } That is, register r4 is ...
- Sat Apr 27, 2024 6:32 am
- Forum: Bug Reports
- Topic: RECORD Fields with Identical Identifier
- Replies: 1
- Views: 1663
RECORD Fields with Identical Identifier
Via a typo I have come across this (Astrobe for Cortex-M0v 9.1): MODULE M; TYPE R = RECORD x: INTEGER; x: INTEGER; y: INTEGER END; PROCEDURE p; VAR r: R; BEGIN r.x := 13; r.y := 17 END p; END M. Looking at the assembly code for 'p': PROCEDURE p; VAR r: R; BEGIN . 24 018H 0B500H push { lr } . 26 01AH...
- Thu Apr 25, 2024 11:12 am
- Forum: Cortex-M0, M3, M4 and M7
- Topic: RP2040: Library & Tools for Astrobe Available
- Replies: 11
- Views: 10791
Re: RP2040: Library & Tools for Astrobe Available
Latest update and changes: https://oberon-rtk.org/description/changes-2024-04-25/ New library module Alarms. Example programs to evaluate a test module Alarms and the library module Alarms: https://oberon-rtk.org/examples/alarmeval/ and https://oberon-rtk.org/examples/alarmtest/. Example program to ...
- Tue Apr 16, 2024 6:19 am
- Forum: Cortex-M0, M3, M4 and M7
- Topic: RP2040: Library & Tools for Astrobe Available
- Replies: 11
- Views: 10791
Re: RP2040: Library & Tools for Astrobe Available
Latest update and changes: https://oberon-rtk.org/description/changes-2024-04-16/ New example program to introduce the micro-seconds tasking system, with measurements and evaluations of minimum set-up time and minimum time between consecutive tasks, run from flash memory or SRAM: https://oberon-rtk....