ps2.asm

Cypress 的(鼠标+键盘)复合设备汇编源程序

        CPU 63413
label:          XPAGEON

;========================================================================
;   FILE: dual_ifc.asm 
;
;   This file includes all the files necessary to build a ps2 keyboard
;   executable.  
;REVISION HISTORY
;
;
;
;========================================================================


;include all "inc" files used by the code

    include "regs.inc"
    include "ps2.inc"
    include "macros.inc"
    include "at101.inc"
    include "portdef.inc"




PS2_KEYBOARD:   equ 0               
USB_KEYBOARD:   equ 1

;========================================================================
;  interrupt vector table -- must be located here
;========================================================================

    ORG     00h

    jmp     sys_reset               ; reset vector

    jmp     illegal_int       ; USB bus reset

    jmp     illegal_int             ; 128us interrupt

    jmp    dual_ifc_1ms_ISR           ; 1.024ms interrupt

    jmp     illegal_int             ; endpoint 0 interrupt

    jmp     illegal_int             ; endpoint 1 interrupt

	jmp	illegal_int			; endpoint 2 interrupt

    jmp     illegal_int             ; reserved interrupt

    jmp     illegal_int             ; reserved interrupt

    jmp     illegal_int             ; reserved interrupt

    jmp     illegal_int                 ; DAC interrupt

    jmp     illegal_int                ; GPIO interrupt

    jmp     illegal_int             ; reserved interrupt

;========================================================================
;
;   FUNCTION: dual_ifc_1ms_ISR
;
;   purpose:    
;   provides the entry point for the 1 millisecond tick.
;   it performs the necessary ps2-specific
;   functions and returns.
;
;
;========================================================================
dual_ifc_1ms_ISR:
    push    A                       ;save A
    inc    [dual_ifc_1ms]              ;otherwise increment 1msec counter
;    iowr    WATCHDOG_REG            ;clear watchdog
    pop    a                        ;restore A reg
    reti                            ;return from interrupt

;========================================================================
;
;   FUNCTION: sys_reset
;
;   purpose:    
;   reset entry point for code
;
;
;========================================================================


illegal_int:
sys_reset:
    di                                        ;disable interrupts   
    mov       A,0ffh 
    iowr      PORT3_DATA_REG
    mov        A,NORMAL                        ;configure GPIO reg
    iowr     GPIO_CONFIG_REG
    mov     A,0ffh                          ;drive connect bit high
    iowr    PORT3_DATA_REG



    mov     a,0                             ;set psp stack to 0
    mov     psp,a                           ; 
    mov     a,0ffh                          ;set dsp stack to 0xff
    swap    a,dsp                           ;now we can call functions

    mov     A,0                             ;zero endpoint interrupt reg
    iowr    ENDPOINT_INTERRUPT_REG            
    mov     [dual_ifc_keyboard],A           ;set type to ps2 initially
   jmp      ps2main                        ; go straight to ps2

.bummer:
    jmp     .bummer                          ;loop if we ever get here


; the dsp will remain at 0 for both ps2 and usb. Allow 30h bytes for it.

dsp_stack_size:                 equ     30h

; the psp will start at 0xff for ps2 and 0xe0 for usb (to avoid the
; USB queues)

psp_stack_size:                 equ     20h

ram_base:                       equ     psp_stack_size  ;application ram start
dual_ifc_keyboard:              equ     ram_base        ;keyboard type
dual_ifc_1ms:                   equ     ram_base+1      ;1msec counter
ps2main_ram_base:               equ     ram_base+2      ;and ps2 ram also

;include all code which resides in lower 4k now.

include "ps2main.asm"
include "ps2_io.asm"
ps2key_ram_base:            equ     (ps2main_ram_base + PS2MAIN_RAM_SIZE)
include    "ps2key.asm"

;stub out this routine, it's not used in a ps2-only build but must be resolved
;during assembly
usbkey_putkey:
  ret
                                                                                              
ps2_ram_end:                equ     (ps2key_ram_base + PS2KEY_RAM_SIZE)


ksc_ram_base:               equ     080h
include "keyscan.asm"
include "matrix.asm"



;define some constants which are not used but will show up in the
;listing file in a contiguous block so that we can easily examine the
;ram usage for the project in the listing file.

AAA_RAM_PS2_START:      equ     ps2main_ram_base
AAB_RAM_PS2_END:        equ     ps2main_ram_base + PS2MAIN_RAM_SIZE- 1
AAC_RAM_PS2_START:      equ     ps2key_ram_base
AAD_RAM_PS2_2END:       equ     ps2key_ram_base + PS2KEY_RAM_SIZE - 1


AAI_RAM_KSC_START:      equ     ksc_ram_base
AAJ_RAM_KSC_END:        equ     ksc_ram_base + KSC_RAM_SIZE - 1