📄 tmp6010.s
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;******************************************************************************
; How to use this file: *
; ====================== *
; *
; This file is a basic template for creating Assembly code for a dsPIC30F *
; device. Copy this file into your project directory and modify or *
; add to it as needed. *
; *
; Add the device linker script (e.g., p30f6010.gld) and the device *
; include file (e.g. p30f6010.inc). If you are using this file for *
; an application that uses a device other than dsPIC 30F6010 which is *
; identified in the list of supported devices, add the linker script and *
; include file specific to that device into your project. *
; *
; If you plan to use initialized data sections in the application and *
; would like to use the start-up module in the run-time library to *
; initialize the data sections then use the template file in this folder *
; named, "tmp6010_srt.s". Refer to the document "dsPIC 30F Assembler, *
; Linker and Utilities User's Guide" for further information on the start-up*
; module in the run-time library. *
; *
; If interrupts are not used, all code presented for that interrupt *
; can be removed or commented out using comment symbols (semi-colons). *
; *
; For additional information about dsPIC 30F architecture and language *
; tools, refer to the following documents: *
; *
; MPLAB C30 Compiler User's Guide : DS51284 *
; dsPIC 30F Assembler, Linker and Utilities User's Guide: DS51317 *
; dsPIC 30F 16-bit MCU Family Reference Manual : DS70046 *
; dsPIC 30F Power and Motion Control Family Data Sheet : DS70082 *
; dsPIC 30F Programmer's Reference Manual : DS70030 *
; *
;******************************************************************************
; *
; Author : *
; Company : *
; Filename : tmp6010.s *
; Date : 01/25/2005 *
; File Version : 1.30 *
; *
; Other Files Required: p30F6010.gld, p30f6010.inc *
; Tools Used:MPLAB GL : 7.01 *
; Compiler : 1.30 *
; Assembler: 1.30 *
; Linker : 1.30 *
; *
; Devices Supported by this file: *
; dsPIC 30F2010 *
; dsPIC 30F2011 *
; dsPIC 30F3010 *
; dsPIC 30F4012 *
; dsPIC 30F3011 *
; dsPIC 30F4011 *
; dsPIC 30F6010 *
; *
;******************************************************************************
; Notes: *
; ====== *
; *
;1. The device include file defines bit names and their location within SFR *
; words. Replace the path to the include file, if necessary. *
; For e.g., to use the p30f2010 device modify the .include directive to *
; .include "Yourpath\p30F2010.inc" *
; *
;2. The "config" macro is present in the device specific '.inc' file and can *
; be used to set configuration bits for the dsPIC 30F device. *
; The '.inc' files also contain examples on using the "config" macro. *
; Some examples have been provided in this file. The user application may *
; require a different setting for the configuration bits. *
; The dsPIC 30F 16-bit MCU Family Refernce Manual(DS70046) explains the *
; function of the configuration bits. *
; *
;3. The "__reset" label is the first label in the code section and must be *
; declared global. The Stack Pointer (W15) and the Stack Pointer Limit *
; register must be initialized to values that are past the run-time heap *
; space, so as to avoid corrupting user data. Initializing these registers *
; at the "__reset" label ensures that user data is not corrupted *
; accidentally. The __SP_init and __SPLIM_init literals are defined by the *
; linker. The linker automatically addresses above the run-time heap to *
; these symbols. Users can change the __SP_init and __SPLIM_init literals to*
; suit their application. *
; *
;4. A ".section <section_name>, <attributes>" directive declares a new section*
; named "<section_name>" with an attribute list that specifies if the *
; section is located in Program Space(code), Uninitialized(bss) or *
; Initialized Data Space(data). Refer to the document "dsPIC 30F Assembler, *
; Linker and Utilities User's Guide" for further details. *
; *
;5. Initialize W registers: Using uninitialized W registers as Effective *
; Addresses(pointers) will cause an "Uninitialized W Register Trap" ! *
; *
;6. The label "__T1Interrupt" is defined in the device linker script. The *
; label defines the starting location in program space of the Timer1 *
; interrupt service routine (ISR). *
; Similarly, the linker script defines labels for all ISRs. Notice, that *
; the ISR label names are preceded by two underscore characters. *
; When users needs to write ISR code, they must use these labels after *
; providing them global scope. The linker will then place the ISR address in*
; the respective interrupt vector table location in program space. *
; Context Save/Restore in ISRs can be performed using the double-word PUSH *
; instruction,PUSH.D. User can also make use of MOV.D, PUSH and PUSH.S *
; instructions. Refer dsPIC 30F 16-bit MCU Family Refernce Manual(DS70046) *
; for further details. *
; *
;******************************************************************************
; *
; Additional Notes: *
; *
; *
; *
; *
;******************************************************************************
.equ __30F6010, 1
.include "p30f6010.inc"
;..............................................................................
;Configuration bits:
;..............................................................................
config __FOSC, CSW_FSCM_OFF & XT_PLL16 ;Turn off clock switching and
;fail-safe clock monitoring and
;use the External Clock as the
;system clock
config __FWDT, WDT_OFF ;Turn off Watchdog Timer
config __FBORPOR, PBOR_ON & BORV_27 & PWRT_16 & MCLR_EN
;Set Brown-out Reset voltage and
;and set Power-up Timer to 16msecs
config __FGS, CODE_PROT_OFF ;Set Code Protection Off for the
;General Segment
;..............................................................................
;Program Specific Constants (literals used in code)
;..............................................................................
.equ SAMPLES, 64 ;Number of samples
;..............................................................................
;Global Declarations:
;..............................................................................
.global _wreg_init ;Provide global scope to _wreg_init routine
;In order to call this routine from a C file,
;place "wreg_init" in an "extern" declaration
;in the C file.
.global __reset ;The label for the first line of code.
.global __T1Interrupt ;Declare Timer 1 ISR name global
;..............................................................................
;Constants stored in Program space
;..............................................................................
.section .myconstbuffer, code
.palign 2 ;Align next word stored in Program space to an
;address that is a multiple of 2
ps_coeff:
.hword 0x0002, 0x0003, 0x0005, 0x000A
;..............................................................................
;Uninitialized variables in X-space in data memory
;..............................................................................
.section .xbss, bss, xmemory
x_input: .space 2*SAMPLES ;Allocating space (in bytes) to variable.
;..............................................................................
;Uninitialized variables in Y-space in data memory
;..............................................................................
.section .ybss, bss, ymemory
y_input: .space 2*SAMPLES
;..............................................................................
;Uninitialized variables in Near data memory (Lower 8Kb of RAM)
;..............................................................................
.section .nbss, bss, near
var1: .space 2 ;Example of allocating 1 word of space for
;variable "var1".
;..............................................................................
;Code Section in Program Memory
;..............................................................................
.text ;Start of Code section
__reset:
MOV #__SP_init, W15 ;Initalize the Stack Pointer
MOV #__SPLIM_init, W0 ;Initialize the Stack Pointer Limit Register
MOV W0, SPLIM
NOP ;Add NOP to follow SPLIM initialization
CALL _wreg_init ;Call _wreg_init subroutine
;Optionally use RCALL instead of CALL
;<<insert more user code here>>
done:
BRA done ;Place holder for last line of executed code
;..............................................................................
;Subroutine: Initialization of W registers to 0x0000
;..............................................................................
_wreg_init:
CLR W0
MOV W0, W14
REPEAT #12
MOV W0, [++W14]
CLR W14
RETURN
;..............................................................................
;Timer 1 Interrupt Service Routine
;Example context save/restore in the ISR performed using PUSH.D/POP.D
;instruction. The instruction pushes two words W4 and W5 on to the stack on
;entry into ISR and pops the two words back into W4 and W5 on exit from the ISR
;..............................................................................
__T1Interrupt:
PUSH.D W4 ;Save context using double-word PUSH
;<<insert user code here>>
BCLR IFS0, #T1IF ;Clear the Timer1 Interrupt flag Status
;bit.
POP.D W4 ;Retrieve context POP-ping from Stack
RETFIE ;Return from Interrupt Service routine
;--------End of All Code Sections ---------------------------------------------
.end ;End of program code in this file
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