📄 usb_int.asm
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include ht82k96e.inc
include usbFIFO.inc
;"FIFO_type"
@Setup_D EQU 7 ;direction
@INTERFACE EQU 0
Setup_Type EQU 60H ;Type
Setup_Rev EQU 1FH ;Recipient (Just use 2 bits)
wValueH_Typ EQU 60H ;D6..5 Type: 0-Standard, 1-Class, 2-Vendor
wValueH_Dst EQU 1FH ;
MOUSE_STATUS_SIZE EQU 4 ;
extern bFLAG_SndFC :bit ;has control pipe data to transmitter
extern bFLAG_Setup :bit
extern bFLAG_FIFO_REDY :bit
extern bFLAG_RsqF :bit
extern bFLAG_AdrF :bit
extern bRmtWakeup :bit
extern bhas_data_out_previous :bit
extern bhas_data_out_previous1 :bit
extern bhas_data_out_previous2 :bit
extern bsetup_flag :bit ;there are setup cmd received
extern bCMD_INDEX :bit
extern baddr_state :bit
extern F_MouseChange :bit
extern btime_out_KB :bit
extern breseume_s :bit
extern bwait_setup :bit
extern fifo_out1 :byte
extern fifo_out2 :byte
extern fifo_out3 :byte
extern fifo_out4 :byte
extern fifo_out5 :byte
extern fifo_out6 :byte
extern fifo_out7 :byte
extern fifo_out8 :byte
extern stall :byte
extern FIFO0_Wr_Check :near
extern FIFO0_Rd_Check :near
extern FIFO1_Rd_Check :near
extern FIFO2_Rd_Check :near
extern LEN0_Rd_Check :near
extern LEN0_Wr_Check :near
extern ReadLen0 :near
extern WriteLen0 :near
extern ReadFIFO0 :near
extern ReadFIFO1 :near
extern ReadFIFO2 :near
extern WriteFIFO0 :near
extern FIFO1_Wr_Check :near
extern WriteFIFO1 :near
extern FIFO2_Wr_Check :near
extern WriteFIFO2 :near
extern GetPipeBit :near
extern clearstall :near
extern setstall :near
extern GetEnd :near
extern StandardRequest :near
extern ClassRequest :near
extern ReadNextCnf :near
extern MoveMouseData :near
extern ReturnAddr :byte
extern FIFO_SendLen :byte
extern FIFO_Type :byte
extern TempKBTime :byte
extern TempKBTime_L :byte
extern CMD_ADDR :byte
extern int_temp1 :byte
FIFO_addr equ int_temp1
usbint_var .section 'data'
isr_usb_acc db ?
isr_usb_status db ?
isr_usb_mp1 db ?
isr_usb_mp0 db ?
isr_usb_tblp db ?
int_reg_temp db ? ;for store USB pipe int register
;**************************************************************************
;* External INT subroutine
;**************************************************************************
usbExt .Section AT 500H 'code'
;External interrupt service routine
EXT_START:
clr wdt ;
MOV ISR_USB_ACC,A ; Save ACC
MOV A,STATUS ; Save STATUS
MOV isr_usb_status,A ;
MOV A,USB_REG_BANK ; Set bank pointer to USB control
MOV BP,A ; register bank
MOV A,MP1 ;
MOV isr_usb_mp1,A ;
mov a,mp0 ;
mov isr_USB_mp0,a ;
mov a,tblp ;
mov isr_usb_tblp,a ;
clr intc.1 ;
set intc.0 ;
clr FIFO_w_c_b ; use in Bread Board only
;-----------------------------------------------------------------------------------
snz suspend_line ;
jmp check_Access_FIFO ;
mov a,11110000b ; clear Int_reg within suspend state
andm a,Int_reg ;
sz resume_line ;
jmp turn_on_usb ;
jmp Exit_of_Ext_start ;
turn_on_usb:
set breseume_s ;
set on_usb_clk ; turn on USB CLK
clr regulator_off ;
;-----------------------------------------------------------------------------------
;ExitExt:
Exit_of_Ext_start:
mov a,isr_usb_tblp ;
mov tblp,a ;
mov a,isr_usb_mp0 ;
mov mp0,a ;
MOV A,isr_usb_mp1 ;
MOV MP1,A ;
MOV A,0 ; Set bank pointer to UC
MOV BP,A ; register bank
MOV A,Isr_usb_status ; Restore STATUS
MOV STATUS,A ;
MOV A,isr_usb_acc ; Restore ACC
clr intc.0 ;
set intc.1 ;
RETI ;
;-----------------------------------------------------------------------------------
;-----------------------------------------------------------------------------------
check_Access_FIFO:
clr breseume_s ;
set on_usb_clk ; turn on USB CLK
clr regulator_off ;
sz Int_reg.@int0 ;
jmp AccessFIFO0 ;
;other pipe except pipe0 interrupt
mov a,Int_reg ;
sz Int_reg_temp ;
jmp examine_int123 ;
and a,00001110b ;
mov Int_reg_temp,a ;
examine_int123:
sz Int_reg_temp.@int1 ;
jmp AccessFIFO1 ;
sz Int_reg_temp.@int2 ;
jmp AccessFIFO2 ;
sz Int_reg_temp.@int3 ;
jmp AccessFIFO3 ;
jmp Exit_of_Ext_start ;
;-----------------------------------------------------------------------------------
;-----------------------------------------------------------------------------------
Check_Pipe0:
AccessFIFO0:
set chk_usb_reset_event ; set usb mode flag
clr Int_reg.@int0 ; clr pipe0 int flag
MOV A,USB_MISC ; MP1 point to Misc. register
MOV MP1,A ;
;------------------------------------------------------------------------------------
sz bwait_setup ; (bwait_setup=0,代表可能刚刚收到Setup command,但还未收进来)
jmp wait_next_setup ; (bwait_setup=1,代表目前正等待接收新的Setup command)
snz r1.@usb_len0 ; 检查是否收到Zero-length packet
jmp AccessFIFO0_cont ; 可能收到OUT或IN packet
;------------------------------------------------------------------------------------
;----------------------------------------------------------------------
; Remark : 只检查接收Setup command,其它不管
;----------------------------------------------------------------------
wait_next_setup:
MOV A,USB_MISC ; MP1 point to Misc. register
MOV MP1,A ;
nop ;
nop ;
sz r1.@USB_Setup ; 检查是否收到SETUP command
jmp AccessFIFO0_cont ; 收到SETUP command
JMP ExitExt0 ;
;--------------------------------------------------------------------------------------
AccessFIFO0_cont:
;examine FIFO0 IN, SETUP, OUT Interrupt
snz bhas_data_out_previous1 ;
jmp AccessFIFO0_cont1 ;
clr bhas_data_out_previous1 ;
jmp ExitExt0 ;
;-------------------------------------------------------------------------------
AccessFIFO0_cont1:
snz bhas_data_out_previous2 ;
jmp AccessFIFO0_cont11 ;
clr bhas_data_out_previous2 ;
jmp ExitExt0 ;
;-------------------------------------------------------------------------------
AccessFIFO0_cont11:
set bFLAG_Setup ; 预设有收到Setup command
CheckSetup:
MOV A,USB_MISC ; MP1 point to Misc. register
MOV MP1,A ;
nop ;
nop ;
snz r1.@USB_Setup ;
clr bFLAG_Setup ; 代表没有收到Setup command(或前次INT已经将r1.@USB_Setup清掉)
snz bFLAG_Setup ;
JMP AccessFIFO0_cont2 ; No,收到一个IN, (data stage(Host to device)
Setup_stage:
clr r1.@USB_Setup ; 清除USB setup bit
clr r1.@USB_Len0 ; 清除USB_Len0 bit
clr bwait_setup ; 清除bwait_setup(代表这次INT收到Setup command)
set bsetup_flag ; 设定bsetup_flag=1(代表下次的IN进来的时候,要把这次的Setup command收进来)
jmp Exitext0 ; 收到Setup command先离开USB_INT,下次收到IN的时候再将command收进来
;-------------------------------------------------------------------------------
AccessFIFO0_cont2:
CALL FIFO0_Rd_Check ; Any data in FIFO 0 ?
CLR R1.@USB_Req ; No: Clear request for FIFO0_Rd_Check
SNZ Z ;
JMP HaveDataInFIFO0 ; Yes
;----------------------------------------------------------------------
; Remark : Host已经读走了8-byte的data,在收到IN之後,要将下一批data送到Host
;----------------------------------------------------------------------
JMP SendFIFO0 ; 送出下一批data到Host
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