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Microchip C18編譯器，支持Microsoft最新芯片-Microchip C18 compiler, the latest chip support for Microsoft

Release Notes for MPASM(TM) Assembler version v5.00

30 September, 2005

-----------------------------------------------------------------

Table of Contents

-----------------------------------------------------------------

* Important MPLINK and MPLAB IDE Compatibility Note

* Command Line Device Options Supported

* Operating System Support List for v5.00

* Repairs and Enhancements Made in v5.00

* Known Problems

* Serial EEPROM Support

* Using MPASM Assembler

* Customer Support

----------------------------------------------------------------------

Important MPLINK and MPLAB IDE Compatibility Note

----------------------------------------------------------------------

Due to a change in COFF file format, MPASM v5.00 and later will

not be compatible with versions of MPLINK prior to v4.00 or

versions of the MPLAB IDE prior to v7.21.

MPASM v5.00 and later will have backward compatibility to earlier

versions at the source level only. Any existing object files or

libraries compiled with earlier versions of the tools will not link

using new versions of the tools. They will need to be re-assembled

from source.

-----------------------------------------------------------------

Command Line Device Options Supported

-----------------------------------------------------------------

10F200 10F202 10F204 10F206

10F220 10F222

12C508 12C508A 12C509 12C509A

12C671 12C672 12CE518 12CE519

12CE673 12CE674 12CR509A 12F508

12F509 12F510 12F629 12F635

12F675 12F683

14000

16C432 16C433 16C505 16C52

16C54 16C54A 16C54B 16C54C

16C55 16C554 16C557 16C558

16C55A 16C56 16C56A 16C57

16C57C 16C58A 16C58B 16C5X

16C61 16C62 16C620 16C620A

16C621 16C621A 16C622 16C622A

16C62A 16C62B 16C63 16C63A

16C64 16C642 16C64A 16C65

16C65A 16C65B 16C66 16C662

16C67 16C71 16C710 16C711

16C712 16C715 16C716 16C717

16C72 16C72A 16C73 16C73A

16C73B 16C74 16C745 16C747

16C74A 16C74B 16C76 16C765

16C77 16C770 16C771 16C773

16C774 16C781 16C782 16C84

16C923 16C924 16C925 16C926

16CE623 16CE624 16CE625 16CR54

16CR54A 16CR54B 16CR54C 16CR56A

16CR57A 16CR57B 16CR57C 16CR58A

16CR58B 16CR62 16CR620A 16CR63

16CR64 16CR65 16CR72 16CR83

16CR84 16CXX 16F505 16F506

16F54 16F57 16F59 16F627

16F627A 16F628 16F628A 16F630

16F636 16F639 16F648A 16F676

16F684 16F685 16F687 16F688

16F689 16F690 16F716 16F72

16F73 16F737 16F74 16F76

16F767 16F77 16F777 16F785

16F818 16F819 16F83 16F84

16F84A 16F87 16F870 16F871

16F872 16F873 16F873A 16F874

16F874A 16F876 16F876A 16F877

16F877A 16F88 16F913 16F914

16F916 16F917 16F946 16HV540

17C42 17C42A 17C43 17C44

17C752 17C756 17C756A 17C762

17C766 17CR42 17CR43 17CXX

18c242 18c252 18c442 18c452

18c601 18c658 18c801 18c858

18f1220 18F1230 18F1231 18f1320

18F1330 18F1331 18f2220 18F2221

18f2320 18F2321 18f2331 18f2410

18F24J10 18f242 18f2420 18LF2423*

18f2431 18f2439 18F2450* 18f2455

18f248 18f2480 18f2510 18F25J10

18f2515 18f252 18f2520 18LF2523*

18f2525 18f2539 18f2550 18f258

18f2580 18f2585 18f2610 18f2620

18f2680 18f2681 18f4220 18F4221

18f4320 18F4321 18f4331 18f4410

18F44J10 18f442 18f4420 18LF4423*

18f4431 18f4439 18F4450* 18f4455

18f448 18f4480 18f4510 18F45J10

18f4515 18f452 18LF4523* 18f4520

18f4525 18f4539 18f4550 18f458

18f4580 18f4585 18f4610 18f4620

18f6310 18f6390 18f4680 18f4681

18f6410 18f64J15 18f6490 18f65J10

18f65J15 18f6520 18f6525 18F6527

18f6585 18f66J10 18f66J15 18f6620

18f6621 18F6622 18f6627 18F66J60

18F66J65 18f6680 18f67J10 18f6720

18f6722 18F67J60 18f8310 18f8390

18f8410 18f84J15 18f8490 18f85J10

18f85J15 18f8520 18f8525 18F8527

18f8585 18f86J10 18f86J15 18f8620

18f8621 18F8622 18f8627 18F86J60

18F86J65 18f8680 18f87J10 18f8720

18f8722 18F87J60 18F96J60 18F96J65

18F97J60

EEPROM16 EEPROM8

rfPIC12C509AF rfPIC12C509AG rfPIC12F675F

rfPIC12F675H rfPIC12F675K

*Note: New part support since last release

THE PARTS CORRESPONDING TO THESE OPTIONS MAY NOT ALL BE

COMMERCIALLY AVAILABLE.

These can be chosen through the introductory screen, on the command

line, or in source file. The selections 16C5X, 16CXX, 17CXX, and

18CXX are supported as generic family indicators.

The selections EEPROM8 and EEPROM16 are provided for generic memory

product support. Read below for a description of how to use MPASM

Assembler to generate files for programming Microchip Serial EEPROM

devices. Use files 'MCP250XX.INC' and 'MCP250XX.ASM' as references for

programming I/O expander (MCP250XX) devices. The file 'MCP250XX.ASM'

is in the 'TEMPLATE\CODE' directory under 'MPLAB'.

The standard header files have been updated to reflect these devices.

One header file, MEMORY.INC, is provided for generic memory product

support. Another header file, MCP250XX.INC, is provided for generic

MCP250XX device support.

NOTES:

- Use the P12C509A.INC header file for the PIC12CR509A;

use the P16C620A.INC header file for the PIC16CR620A.

- Use the 16C5X.INC header file for the following device command

line options:

16C52

16C54

16CR54

16C54A

16CR54A

16C54B

16CR54B

16C54C

16CR54C

16C55

16C55A

16C56

16C56A

16CR56A

16C57

16CR57A

16CR57B

16C57C

16CR57C

16C58A

16CR58A

16C58B

16CR58B

- Use the P16F5X.INC header file for the following device

command line options:

16F54

16F57

16F59

-----------------------------------------------------------------

Operating System Support List for v5.00

-----------------------------------------------------------------

MPASMWIN.EXE is the 32-bit Windows version of MPASM Assembler which

is distributed with MPLAB IDE and MPLAB C18. It is supported by the

following platforms:

Windows 98 Windows NT Windows ME

Windows 2000 Windows XP

MPASM.EXE is the command-line version of MPASM Assembler which is

distributed with MPLAB C18 only. It is supported by the following

platforms:

Windows 98 Windows NT

Windows ME Windows 2000 Windows XP

NOTE: MPASM.EXE does not support device file names greater than an 8.3

format (e.g. p18f87J15.INC). Use MPASMWIN.EXE instead.

-----------------------------------------------------------------

Repairs and Enhancements Made in v5.00

-----------------------------------------------------------------

Early adopter part support has been added for these devices:

18F4450

18F2450

18LF2423

18LF2523

18LF4423

18LF4523

Problems resolved:

(22494) Register bits in the header files of devices 18F2620 and

18F4620 were incorrect.

(25433) T08BIT was defined in the PIC18F4620 family datasheet,

but T016BIT was in the include files.

(25456) PSA was defined in the PIC18F4680 family datasheet, but

the include files contain T0PS3 instead of PSA bit for

18F4680/4585/2680/2585.

(23915) Include files for 18F2331/2431 contain PORTD, but these

devices do not have this port.

(26087) P18F8490.INC file was missing SFR BAUDCON1 and bits for

PIR3.LCDIF, IPR3.LCDIP and PIE3.LCDIE.

(26088) Pin P1C was defined as bit 7 in the P18F1320.INC file

when it should be bit 6.

(26983) T0PS3 was defined instead of PSA in the include files for

the following devices:

18F4580/4480/2580/2480.

Bit name PSA in T0CON register was added.

(26984) T16BIT was defined instead of T08BIT in the include files

for the following devices:

18F2410/2510/2515/2610/4410/4510/4515/4610

T08BIT in T0CON register was added.

(27504) Corrected SFR register and bit names for 16F506 and

12F510 to match the data sheet (DS41268A).

(27500) Configuration word for P10F220/222 did not match the

data sheet (DS41270A) for bit 0. Updated the .INC file

to use IOSCFS to match the data sheet.

-----------------------------------------------------------------

Known Problems

-----------------------------------------------------------------

The following is a list of known problems. For a list of

limitations, please see MPASM Assembler Help, Troubleshooting,

Assembler Limitations.

(1008) There are no warnings when overflow or underflow occurs

during expression evaluation.

(16921) MPASM Assembler generates a COD file which cannot handle line

number information for program memory addresses greater than

64K. This adversely affects debugging.

The workaround is to generate a .O file, link with MPLINK

Linker, and debug in MPLAB IDE v6.0 or greater.

Here is an example of what might happen. Suppose the source is

ORG 0xF00000

DB 0xAB ; eedata

ORG 0x0

MOVLW 3

MOVLW 4

The disassembly window in MPLAB IDE may appear this way:

Disassembly Source

ORG 0xF00000

000000 0E03 MOVLW 3 DB 0xAB

ORG 0x0

MOVLW 3

000000 0E04 MOVLW 4 MOVLW 4

The source line for address 0xF00000 has been associated with

the code at address 0x0.

(17233) Errors in macros in an include file can be reported in an asm

file that includes it. If a macro is defined in an include file

and called in an asm file, MPASM reports errors, warnings, and

messages in the macro definition as errors, warnings, and

messages in the asm file, but using line numbers from the

include file.

(17236) Using a symbol other than one introduced by the DEFINE

directive as the operand of an IFDEF or IFNDEF directive

causes the IFDEF/IFNDEF to possibly be evaluated incorrectly.

(18510) A file register operand which is greater than the absolute max

ram address does not generate a message of any kind.

For example,

LIST P=18F452

MOVWF 0x1000

END

will assemble without warning.

(18811) MPASMWIN generates incorrect code for 'goto' targeting a

local label.

A 'goto' targeting a local label is generating an instruction

where the file register field is set to 0 instead of the local

label's value.

The workaround is to use the "$ + n" expression as the target

of the 'goto'.

(19703) The Japanese directory delimiter character on Windows XP-J and

Windows ME-J is not accepted by MPASM.

The workaround is to invoke MPASM on the command line with

a source file path which does not contain any directory

delimiters.

(19788) MPASM.EXE has problems accepting a file name which contains

a space just before the '.' character of the extension.

For example,

MPASM.EXE /Q "TEST .ASM"

will cause a 'file not found' error, but for MPASMWIN.EXE, this

is acceptable.

(20776) The return value of the MPASMWIN.EXE process (returned by

'spawnvp') does not get stored in the DOS environment variable

ERRORLEVEL.

(20986) When assembling with the '/o' option,

a duplicate address label declaration causes no error, warning,

or message. For example, the program fragment

U1 IDATA

X DB 1

U2 IDATA

X DB 2

CODE

MOVWF X

assembles quietly, but the definition of X which is used in the

MOVWF instruction is not well defined.

(21677) When using MPASM.EXE without the '/q' option, and an output

file is specified to be in a nonexistent directory, then the

output file is not generated, but no error message is emitted.

When the '/q' option is used, the message "Couldn't open

file..." is emitted. This can be confusing.

(21798) The length of the command line argument string to mpasm.exe is

limited to about 120 characters. Anything beyond that is

truncated.

(21988) MPASM cannot handle a source file with UNIX-style line endings.

Please convert line endings to the DOS (CR/LF) format.

(22227) Error messages are not emitted to standard out.

(22387) MPASM cannot assemble files in Unicode format.

(22541) A warning is not emitted if the operand for the PUSHL

instruction is less than -128, only if it is less than -255.

A warning should be emitted if the operand is less than -128,

since the operand is 8 bits wide.

(22660) When assembling with '/o' and the operand of a DT directive is

relocatable but more than 8 bits wide, the linker will fill

both bytes of the directive with 16 bits of the operand

(instead of truncating the operand to 8 bits for a RETLW

instruction):

UDATA 0x124

X RES 1

CODE 0x100

DT X

will generate 0x0124 at address 0x100 instead of 0x3424

(RETLW 0x24).

(23071) The LIST n=nnn directive does not properly format the

listing file.

(23355) EEDATA at address 0xF00000 and an instruction at address 0x0:

Given this program (for single-file disassembly):

ORG 0xF00000; eedata

DB 0xAB

ORG 0x0

MOVLW 3

MOVLW 4

END

Produces the following in the MPLAB disassembly window:

1: LIST P=18F8720

3: ORG 0xF00000

000000 0E03 MOVLW 3 4: DB 0xAB

6: ORG 0x0

7: MOVLW 0x3

000000 0E04 MOVLW 4 8: MOVLW 0x4

(23490) As MPASM rescans macro expressions, it searches the substituted

arguments for parameters. E.g.,

#define F(X,Y) X + Y

Y EQU 2

movlw F(Y,1)

will yield movlw 2 instead of movlw 3. After Y is substituted

in place of X, it is replaced itself by the second argument

upon rescanning.

(23747) MAXROM is defined incorrectly for 17C43.

The following source code:

LIST p=17c43

ORG 0xFFE

NOP

....

ORG 0xFFFE

NOP

....

END

Should cause the assembler to emit warning[220] when the code

crosses 0x1000. Instead the assembler emits a warning when the

code crosses 0x10000.

Also note that "__maxrom 0xFFF" causes the assembler to emit

the following error:

Error[126] MAXROM.ASM 3 : Argument out of range (must be

greater than or equal to 65535)

As a workaround:

LIST p=17c43

__maxrom 0xFFFF

__badrom 0x1000 - 0xFFFF

ORG 0xFFE

NOP

....

END

Causes the assembler to emit "Invalid ROM location,"

warning[228], when the code crosses 0x1000.

(24275) After a file is compiled, the debug information does not seem

to be loaded.

(24560) No error or warning is produced for the following code:

bsf ,1

END

This assembles as if "bsf 0,1" was given.

(24712) GPIO SFR bits GP3, GP2, GP1, and GP0 are not defined in the

.INC files for the PIC10F20X devices.

(24794) MPASM generates invalid PIC18 relocation for $+<odd offset>.

The following code, containing an invalid goto destination

address, assembles without error when generating an object

file (18f452):

code 0

bra start

startscn code 0x100

start nop

goto $-1

bra $

end

causing a link-time error

Error - file 'C:\test\mpasm\gotoneg1.o', section 'startscn',

Symbol '_startscn_0102' is not word-aligned.

It can not be used as the target of a call or goto instruction.

However, the assembler generates a warning when assembling

equivalent code in absolute mode:

org 0

bra start

org 0x100

start nop

goto $-1

bra $

end

Warning[226] C:\TEST\MPASM\GOTONEG1.ASM 8 : Destination address

must be word aligned

(25130) Incorrect error message given for RES directive.

The following code:

list p=18f452

F CODE

ORG 1

foo res 2

end

produces this message:

Error[158] C:\MPASM\SOURCE\TRES.ASM 4 : Cannot use RES

directive with odd number of bytes

RES has a value of 2 which is even. The ORG 1 is causing an odd

boundary which is what the error message should describe.

(25131) The following code does not produce the expected raw data in

the coff file nor does it give the user a warning that no

memory has been reserved.

list p=18f452

Z CODE

baz res 1

end

(26223) MPASM does not correctly handle Windows CLI and DOS command

line string limitations and error diagnostics can be ambiguous

or absent.

(26588) The Processor Type list in the MPASM.EXE GUI (DOS executable)

doesn't display all of the processors. Many 16xxx and all 18xxx

processors are not shown.

The workaround is to use the MPASMWIN.EXE GUI.

-----------------------------------------------------------------

Serial EEPROM Support

-----------------------------------------------------------------

Two "processor" selections are provided to generate byte data - EEPROM8

and EEPROM16. Both generate data in terms of bytes, but EEPROM8

considers a "word" to be 8 bits wide, while EEPROM16 considers a "word"

to be 16 bits wide. The "program counter" is always incremented in

terms of bytes.

The default size for memory products is 128 bytes. This can be

overridden by using the LIST M=<max address> directive. Note that

<max address> is always evaluated as a decimal number. The header file

MEMORY.INC is provided to define the maximum address for available

memory devices. The format of the defined symbols is _<device>; for

example, to set the maximum memory size for a 24LCS21, use the

directive LIST M=_24LCS21.

The following data generation directives are supported for

memory products:

DW FILL ORG

The behavior of other data generation directives is not guaranteed.

All other directives are unchanged.

An example of generating a file for programming a memory device is

as follows:

;*************************************************

; Generate data for a 8-bit wide memory device.

LIST P=EEPROM8, R=DECIMAL

INCLUDE "MEMORY.INC"

LIST M=_24LCS21

#DEFINE MAX_VALUE 255

ORG 0

;-------------------------------------------------

; Create a packed-byte, null terminated string.

DW "Hello World", 0

;-------------------------------------------------

; Create data representing a line. The X position

; is implied from the position of the data in the

; device. The Y values are stored in the device.

; First, define an equation for the line.

#DEFINE Line( X ) Slope * X + Y_Intercept

; Now define the values needed for the equation.

Slope EQU 10

Y_Intercept EQU 5

; Declare and initialize the X and Y values.

VARIABLE X = 0, Y = Line( X )

; Generate values until the maximum Y value is

; reached or the device is filled up.

WHILE (Y <= MAX_VALUE) && ($ <= _24LCS21)

DW Y

X = X + 1

Y = Line( X )

ENDW

;-------------------------------------------------

; Perform some checking based on the line data

; generated above.

; If the device filled up before the end of the

; line was reached, generate an error. Otherwise,

; if the device is almost out of room, generate a

; message.

IF (Y < MAX_VALUE)

ERROR "Device is full."

ELSE

IF (($+10) > _24LCS21)

MESSG "Device is nearly full."

ENDIF

;-------------------------------------------------

; Fill the rest of the device with zeroes.

FILL 0, _24LCS21 - $ + 1

END

CLRW COMMAND:

The CLRW encoding was changed on all 14-bit core devices from 0x0100

to 0x0103 (v1.40 and later). This will not affect the expected

operation of the instruction, but it will change the value for the

instruction in the hex file and therefore the checksum.

WARNING MESSAGE:

The text for Message #302 was modified to explain more clearly that

bank indication bits are stripped when assembling instructions that

access file registers. The appropriate bank must be selected by the

appropriate bank selection bits. For example, 14-bit core devices

contain the lower seven bits of the file register address in the

opcode, with two bank selection bits in the STATUS register. The

message was changed from:

Argument out of range. Least significant bits used.

to:

bits are correct.

END DIRECTIVE:

Take care to not use the END directive in a macro. If the END directive

is encountered in a macro, it can cause the assembler to loop

indefinitely. Macros should be terminated with the ENDM directive.

-----------------------------------------------------------------

Using MPASM Assembler

-----------------------------------------------------------------

Create your source code with any text editor. The file should contain

ASCII text only. Assemble your code with the command line:

mpasm <file>[.asm]

A version of MPASM Assembler is also available for Windows. To invoke

this assembler, execute:

mpasmwin

from within Windows. You will then be given a Windows interface window.

Help on using the interface is provided on-line. MPASMWIN.EXE can also

be invoked with parameters or through drag-and-drop. In these cases,

the interface screen is not displayed and assembly begins immediately.

Correct any syntax problems, referring to the MPASM Assembler, MPLINK

Object Linker, MPLIB Object Librarian User's Guide(DS33014) for

syntax help. MPASM assembles with INHX32 as the default hex output, and

generates a listing file, error file, and .COD file.

-----------------------------------------------------------------

Customer Support

-----------------------------------------------------------------

The Microchip Web Site

----------------------

Microchip provides online support via our web site at:

http://www.microchip.com

This web site is used as a means to make files and information easily

available to customers. Accessible by using your favorite Internet

browser, the web site contains the following information:

* Product Support - Data sheets and errata, application notes and

sample programs, design resources, user's guides and hardware

support documents, latest software releases and archived software

* General Technical Support - Frequently Asked Questions (FAQs),

technical support requests, online discussion groups, Microchip

consultant program member listing

* Business of Microchip - Product selector and ordering guides, latest

Microchip press releases, listing of seminars and events, listings of

Microchip sales offices, distributors and factory representatives

Development Systems Customer Change Notification Service

--------------------------------------------------------

Microchip's customer notification service helps keep customers current

on Microchip products. Subscribers will receive e-mail notification

whenever there are changes, updates, revisions or errata related to

a specified product family or development tool of interest.

To register, access the Microchip web site at www.microchip.com, click

on Customer Change Notification and follow the registration

instructions.

The Development Systems product group categories are:

* Compilers - The latest information on Microchip C compilers and other

language tools. These include the MPLAB C18 and MPLAB C30 C

compilers; MPASM(TM) and MPLAB ASM30 assemblers; MPLINK(TM) and

MPLAB LINK30 object linkers; and MPLIB(TM) and MPLAB LIB30 object

librarians.

* Emulators - The latest information on Microchip in-circuit emulators.

This includes the MPLAB ICE 2000 and MPLAB ICE 4000.

* In-Circuit Debuggers - The latest information on the Microchip

in-circuit debugger, MPLAB ICD 2.

* MPLAB IDE - The latest information on Microchip MPLAB IDE, the

Windows(R) Integrated Development Environment for development systems

tools. This list is focused on the MPLAB IDE, MPLAB IDE Project

Manager, MPLAB Editor and MPLAB SIM simulator, as well as general

editing and debugging features.

* Programmers - The latest information on Microchip programmers. These

include the MPLAB PM3 and PRO MATE(R) II device programmers and the

PICSTART(R) Plus, PICkit(TM) 1, and PICkit 2 development programmers.

Additional Support

------------------

Users of Microchip products can receive assistance through several

channels:

* Distributor or Representative

* Local Sales Office

* Field Application Engineer (FAE)

* Technical Support

Customers should contact their distributor, representative or field

application engineer (FAE) for support. Local sales offices are also

available to help customers. A listing of sales offices and locations

is available on our website.

Technical support is available through the web site at:

http://support.microchip.com

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