boot.asm

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; Generated by PSoC Designer ver 4.4  b1884 : 14 Jan, 2007
;
;@Id: boot.tpl#161 @
;=============================================================================
;  FILENAME:   boot.asm
;  VERSION:    4.15
;  DATE:       2 August 2004
;
;  DESCRIPTION:
;  M8C Boot Code for CY8C24xxxB microcontroller family.
;
;  Copyright (C) Cypress MicroSystems 2000-2004. All rights reserved.
;
; NOTES:
; PSoC Designer's Device Editor uses a template file, BOOT.TPL, located in
; the project's root directory to create BOOT.ASM. Any changes made to
; BOOT.ASM will be  overwritten every time the project is generated; therfore
; changes should be made to BOOT.TPL not BOOT.ASM. Care must be taken when
; modifying BOOT.TPL so that replacement strings (such as @PROJECT_NAME)
; are not accidentally modified.
;
;=============================================================================

include ".\lib\GlobalParams.inc"
include "m8c.inc"
include "m8ssc.inc"
include "memory.inc"

;--------------------------------------
; Export Declarations
;--------------------------------------

export __Start
IF	(TOOLCHAIN & HITECH)
ELSE
export __bss_start
export __data_start
export __idata_start
export __func_lit_start
export __text_start
ENDIF
export  _bGetPowerSetting
export   bGetPowerSetting


;--------------------------------------
; Optimization flags
;--------------------------------------
;
; To change the value of these flags, modify the file boot.tpl, not
; boot.asm. See the notes in the banner comment at the beginning of
; this file.

; Optimization for Assembly language (only) projects and C-language projects
; that do not depend on the C compiler to initialize the values of RAM variables.
;   Set to 1: Support for C Run-time Environment initialization
;   Set to 0: Support for C not included. Faster start up, smaller code space.
;
IF	(TOOLCHAIN & HITECH)
; The C compiler will customize the startup code - it's not required here

C_LANGUAGE_SUPPORT:              equ 0
ELSE
C_LANGUAGE_SUPPORT:              equ 1
ENDIF


; The following equate is required for proper operation. Reseting its value
; is discouraged.  WAIT_FOR_32K is effective only if the crystal oscillator is
; selected.  If the designer chooses to not wait then stabilization of the ECO
; and PLL_Lock must take place within user code. See the family data sheet for
; the requirements of starting the ECO and PLL lock mode.
;
;   Set to 1: Wait for XTAL (& PLL if selected) to stabilize before
;                invoking main
;   Set to 0: Boot code does not wait; clock may not have stabilized by
;               the time code in main starts executing.
;
WAIT_FOR_32K:                    equ 1


; For historical reasons, by default the boot code uses an lcall instruction
; to invoke the user's _main code. If _main executes a return instruction,
; boot provides an infinite loop. By changing the following equate from zero
; to 1, boot's lcall will be replaced by a ljmp instruction, saving two
; bytes on the stack which are otherwise required for the return address. If
; this option is enabled, _main must not return. (Beginning with the 4.2
; release, the C compiler automatically places an infinite loop at the end
; of main, rather than a return instruction.)
;
ENABLE_LJMP_TO_MAIN:             equ 0


;-----------------------------------------------------------------------------
; Interrupt Vector Table
;-----------------------------------------------------------------------------
;
; Interrupt vector table entries are 4 bytes long.  Each one contains
; a jump instruction to an ISR (Interrupt Service Routine), although
; very short ISRs could be encoded within the table itself. Normally,
; vector jump targets are modified automatically according to the user
; modules selected. This occurs when the 'Generate Application' opera-
; tion is run causing PSoC Designer to create boot.asm and the other
; configuration files. If you need to hard code a vector, update the
; file boot.tpl, not boot.asm. See the banner comment at the beginning
; of this file.
;-----------------------------------------------------------------------------

    AREA TOP (ROM, ABS, CON)

    org   0                        ;Reset Interrupt Vector
    IF	(TOOLCHAIN & HITECH)
;   jmp   __Start                  ;C compiler fills in this vector
ELSE
    jmp   __Start                  ;First instruction executed following a Reset
ENDIF

    org   04h                      ;Supply Monitor Interrupt Vector
    halt                           ;Stop execution if power falls too low

    org   08h                      ;Analog Column 0 Interrupt Vector
    ljmp _COMP_ISR_C
    reti

    org   0Ch                      ;Analog Column 1 Interrupt Vector
    // call	void_handler
    reti

    org   14h                      ;SAR8 ADC Interrupt Vector
    ljmp	_SAR8_ISR
    reti

    org   18h                      ;VC3 Interrupt Vector
    // call	void_handler
    reti

    org   1Ch                      ;GPIO Interrupt Vector
    ljmp _HALL_ISR_C
    reti

    org   20h                      ;PSoC Block DBB00 Interrupt Vector
    // call	void_handler
    reti

    org   24h                      ;PSoC Block DBB01 Interrupt Vector
    // call	void_handler
    reti

    org   28h                      ;PSoC Block DCB02 Interrupt Vector
    ljmp	_DigBuf_ISR
    reti

    org   2Ch                      ;PSoC Block DCB03 Interrupt Vector
    ljmp	_PWM_ISR_C //ljmp	_PWM_ISR
    reti

    org   60h                      ;PSoC I2C Interrupt Vector
    ljmp	_EzI2Cs_ISR
    reti

    org   64h                      ;Sleep Timer Interrupt Vector
    // call	void_handler
    reti

;-----------------------------------------------------------------------------
;  Start of Execution.
;-----------------------------------------------------------------------------
;  The Supervisory ROM SWBootReset function has already completed the
;  calibrate1 process, loading trim values for 5 volt operation.
;
IF	(TOOLCHAIN & HITECH)
 	AREA PD_startup(CODE, REL, CON)
ELSE
    org 68h
ENDIF
__Start:

    ; initialize SMP values for voltage stabilization, if required,
    ; leaving power-on reset (POR) level at the default (low) level, at
    ; least for now. 
    ;
    M8C_SetBank1
    mov   reg[VLT_CR],  80h | LVD_TBEN_JUST | TRIP_VOLTAGE_JUST
    M8C_SetBank0

IF ( WATCHDOG_ENABLE )             ; WDT selected in Global Params
    M8C_EnableWatchDog
ENDIF

IF ( SELECT_32K )
    or   reg[CPU_SCR1],  CPU_SCR1_ECO_ALLOWED  ; ECO will be used in this project
ELSE
    and  reg[CPU_SCR1], ~CPU_SCR1_ECO_ALLOWED  ; Prevent ECO from being enabled
ENDIF

IF	(TOOLCHAIN & HITECH)
ELSE
    ;------------------
    ; Set up the stack
    ;------------------
    mov   A, __ramareas_end        ; Set top of stack to end of used RAM
    swap  SP, A                    ; This is only temporary if going to LMM
ENDIF

    ;-----------------------------------------------
    ; Set Power-related Trim & the AGND Bypass bit.
    ;-----------------------------------------------

IF ( POWER_SETTING & POWER_SET_5V0)            ; *** 5.0 Volt operation   ***
 IF ( POWER_SETTING & POWER_SET_SLOW_IMO)      ; *** 6MHZ Main Oscillator ***
    or  reg[CPU_SCR1], CPU_SCR1_SLIMO
    M8SSC_Set2TableTrims 2, SSCTBL2_TRIM_IMO_5V_6MHZ, 1, SSCTBL1_TRIM_BGR_5V, AGND_BYPASS_JUST
 ELSE                                          ; *** 12MHZ Main Oscillator ***
  IF ( AGND_BYPASS )
    ;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ; The 5V trim has already been set, but we need to update the AGNDBYP
    ; bit in the write-only BDG_TR register. Recalculate the register
    ; value using the proper trim values.
    ;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    M8SSC_SetTableVoltageTrim 1, SSCTBL1_TRIM_BGR_5V, AGND_BYPASS_JUST
  ENDIF
 ENDIF
ENDIF ; 5.0 V Operation

IF ( POWER_SETTING & POWER_SET_3V3)            ; *** 3.3 Volt operation   ***
 IF ( POWER_SETTING & POWER_SET_SLOW_IMO)      ; *** 6MHZ Main Oscillator ***
    or  reg[CPU_SCR1], CPU_SCR1_SLIMO
    M8SSC_Set2TableTrims 2, SSCTBL2_TRIM_IMO_3V_6MHZ, 1, SSCTBL1_TRIM_BGR_3V, AGND_BYPASS_JUST
 ELSE                                          ; *** 12MHZ Main Oscillator ***
    M8SSC_SetTableTrims  1, SSCTBL1_TRIM_IMO_3V_24MHZ, SSCTBL1_TRIM_BGR_3V, AGND_BYPASS_JUST