📄 os_cpu_a.lst
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1 # 1 "os_cpu_a.asm"
2 # 1 "<built-in>"
1 ;**************************************************************************************************
0
0
2 ; uC/OS-II
3 ; The Real-Time Kernel
4 ;
5 ; AVR Specific code
6 ; (AVR-GCC 3.x)
7 ;
8 ;
9 ; File : OS_CPU_A.ASM
10 ; By : Ole Saether
11 ; Port Version : V1.01
12 ;
13 ; AVR-GCC port version : 1.0 2001-04-02 modified/ported to avr-gcc by Jesper Hansen (jesperh@telia
14 ;
15 ; Modifications by Julius Luukko 2003-02-19 (Julius.Luukko@lut.fi):
16 ;
17 ; - Minor modification to OSTickISR's declaration to global and addition of #include <avr/io.h>
18 ; in order to work with gcc 3.3.
19 ; - Moved 'sei' from the beginning of OSTickISR after the increasing of OSIntNesting (as the book s
20 ; - Changed the order of reloading the timer counter and calling of OSIntExit
21 ; - Changed OSIntCtxSw to the way it is supposed to be with OS_VERSION >= 251
22 ; - Changed OSTickISR so that is saves the stack pointer into the current task's OS_TCB if OSTickIS
23 ; first level ISR
24 ; - os_cfg.h must be included (definitions of CPU_CLOCK_HZ and OS_TICKS_PER_SEC)
25 ; - avr/io.h is included to get SIG_OVERFLOW0 to produce the code to the interrupt vector table
26 ;
27 ; Modifications by Julius Luukko 2003-03-06 (Julius.Luukko@lut.fi):
28 ;
29 ; - RAMPZ is also saved to the stack
30 ;
31 ; Modifications by Julius Luukko 2003-03-18 (Julius.Luukko@lut.fi):
32 ;
33 ; - RAMPZ and SREG were popped out of the stack in the wrong order! Corrected this.
34 ; - Divided macros PUSHRS and POPRS into to macros PUSHRS, PUSHSREG, POPRS and POPSREG. Additionall
35 ; in ISRs macro called PUSHSREGISR must be used. It sets the I bit i SREG, since its always unset,
36 ; ISR is entered. It must be, however, set to enable interrupts when the task is run again.
37 ; - RCALLs changed to CALLs. This allows the code of called functions to be further away from the c
38 ; (fixes the "relocating truncated to fit" error from the linker)
39 ;
40 ;
41 ; Modifications by Julius Luukko 2003-03-19 (Julius.Luukko@lut.fi):
42 ;
43 ; - timer interrupt is changed so that the timer counter register is updated right after _not_first
44 ; (was AFTER the call to OSIntExit!!)
45 ;
46 ; Modifications by Julius Luukko 2003-06-24 (Julius.Luukko@lut.fi):
47 ;
48 ; - I/O port addressing is now done using the macro _SFR_IO_ADDR from avr-libc and the address
49 ; definitions are removed from here
50 ; - RAMPZ is pushed and popped only if it is defined, i.e. with chips that have it
51 ;
52 ; Modifications by Julius Luukko 2003-07-21 (Julius.Luukko@lut.fi) for V2.70
53 ;
54 ; - OSTaskSwHook is not called if OS_TASK_SW_HOOK_EN == 0
55 ; - defines typedef to ; so that os_cfg_r.h can be used more easily as a starting point for
56 ; the application specific os_cfg.h
57 ;
58 ;**************************************************************************************************
59
60 ;**************************************************************************************************
61 ; C PREPROCESSOR DIRECTIVES
62 ;**************************************************************************************************
63
64 #include <avr/io.h>
1 /* Copyright (c) 2002,2003 Marek Michalkiewicz, Joerg Wunsch
2 All rights reserved.
3
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions are met:
6
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9
10 * Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in
12 the documentation and/or other materials provided with the
13 distribution.
14
15 * Neither the name of the copyright holders nor the names of
16 contributors may be used to endorse or promote products derived
17 from this software without specific prior written permission.
18
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 POSSIBILITY OF SUCH DAMAGE. */
30
31 /* $Id: io.h,v 1.14 2004/11/24 18:57:36 troth Exp $ */
32
33 /** \defgroup avr_io AVR device-specific IO definitions
34 \code #include <avr/io.h> \endcode
35
36 This header file includes the apropriate IO definitions for the
37 device that has been specified by the <tt>-mmcu=</tt> compiler
38 command-line switch. This is done by diverting to the appropriate
39 file <tt><avr/io</tt><em>XXXX</em><tt>.h></tt> which should
40 never be included directly. Some register names common to all
41 AVR devices are defined directly within <tt><avr/io.h></tt>,
42 but most of the details come from the respective include file.
43
44 Note that this file always includes
45 \code #include <avr/sfr_defs.h> \endcode
46 See \ref avr_sfr for the details.
47
48 Included are definitions of the IO register set and their
49 respective bit values as specified in the Atmel documentation.
50 Note that Atmel is not very consistent in its naming conventions,
51 so even identical functions sometimes get different names on
52 different devices.
53
54 Also included are the specific names useable for interrupt
55 function definitions as documented
56 \ref avr_signames "here".
57
58 Finally, the following macros are defined:
59
60 - \b RAMEND
61 <br>
62 A constant describing the last on-chip RAM location.
63 <br>
64 - \b XRAMEND
65 <br>
66 A constant describing the last possible location in RAM.
67 This is equal to RAMEND for devices that do not allow for
68 external RAM.
69 <br>
70 - \b E2END
71 <br>
72 A constant describing the address of the last EEPROM cell.
73 <br>
74 - \b FLASHEND
75 <br>
76 A constant describing the last byte address in flash ROM.
77 <br>
78 - \b SPM_PAGESIZE
79 <br>
80 For devices with bootloader support, the flash pagesize
81 (in bytes) to be used for the \c SPM instruction. */
82
83 #ifndef _AVR_IO_H_
84 #define _AVR_IO_H_
85
86 #include <avr/sfr_defs.h>
1 /* Copyright (c) 2002, Marek Michalkiewicz <marekm@amelek.gda.pl>
2 All rights reserved.
3
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions are met:
6
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9
10 * Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in
12 the documentation and/or other materials provided with the
13 distribution.
14
15 * Neither the name of the copyright holders nor the names of
16 contributors may be used to endorse or promote products derived
17 from this software without specific prior written permission.
18
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 POSSIBILITY OF SUCH DAMAGE. */
30
31 /* avr/sfr_defs.h - macros for accessing AVR special function registers */
32
33 /* $Id: sfr_defs.h,v 1.14.2.1 2005/01/07 19:25:25 arcanum Exp $ */
34
35 #ifndef _AVR_SFR_DEFS_H_
36 #define _AVR_SFR_DEFS_H_ 1
37
38 /** \defgroup avr_sfr_notes Additional notes from <avr/sfr_defs.h>
39 \ingroup avr_sfr
40
41 The \c <avr/sfr_defs.h> file is included by all of the \c <avr/ioXXXX.h>
42 files, which use macros defined here to make the special function register
43 definitions look like C variables or simple constants, depending on the
44 <tt>_SFR_ASM_COMPAT</tt> define. Some examples from \c <avr/iom128.h> to
45 show how to define such macros:
46
47 \code
48 #define PORTA _SFR_IO8(0x1b)
49 #define TCNT1 _SFR_IO16(0x2c)
50 #define PORTF _SFR_MEM8(0x61)
51 #define TCNT3 _SFR_MEM16(0x88)
52 \endcode
53
54 If \c _SFR_ASM_COMPAT is not defined, C programs can use names like
55 <tt>PORTA</tt> directly in C expressions (also on the left side of
56 assignment operators) and GCC will do the right thing (use short I/O
57 instructions if possible). The \c __SFR_OFFSET definition is not used in
58 any way in this case.
59
60 Define \c _SFR_ASM_COMPAT as 1 to make these names work as simple constants
61 (addresses of the I/O registers). This is necessary when included in
62 preprocessed assembler (*.S) source files, so it is done automatically if
63 \c __ASSEMBLER__ is defined. By default, all addresses are defined as if
64 they were memory addresses (used in \c lds/sts instructions). To use these
65 addresses in \c in/out instructions, you must subtract 0x20 from them.
66
67 For more backwards compatibility, insert the following at the start of your
68 old assembler source file:
69
70 \code
71 #define __SFR_OFFSET 0
72 \endcode
73
74 This automatically subtracts 0x20 from I/O space addresses, but it's a
75 hack, so it is recommended to change your source: wrap such addresses in
76 macros defined here, as shown below. After this is done, the
77 <tt>__SFR_OFFSET</tt> definition is no longer necessary and can be removed.
78
79 Real example - this code could be used in a boot loader that is portable
80 between devices with \c SPMCR at different addresses.
81
82 \verbatim
83 <avr/iom163.h>: #define SPMCR _SFR_IO8(0x37)
84 <avr/iom128.h>: #define SPMCR _SFR_MEM8(0x68)
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