📄 emb_f.asm
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;-----------------------------------------------
; Data is in ROM, use instrcutions to pull from ROM.
;-----------------------------------------------
DataInROM:
mov A, #00h
movc A, @A+DPTR ; Get Data to transmit
mov TXDAT , A
inc DPTR
inc R0 ; Increment the number of bytes in FIFO
djnz gbFControlBufferBytesLeft+1, ROMCheckMaxPacket ; If not zero, the continue.
ROMCheckUpper1:
mov A, gbFControlBufferBytesLeft ; If upper byte of wLength is also zero, buffer is empty.
jz ControlTxUpd ; Are we done with the buffer
dec A ; If it's not zero dec. the upper byte as well.
mov gbFControlBufferBytesLeft, A ; And store it.
ROMCheckMaxPacket:
cjne R0, #EP0_MAX_PACKET_SIZE, DataInROM ; Loop until FIFO is Full
jmp ControlTxUpd ; Done with this FIFO.
;-----------------------------------------------
; Data is in RAM, use instrcutions to pull from RAM.
;-----------------------------------------------
DataInRAM:
movx A, @DPTR ; Get Data to transmit
mov TXDAT , A
inc DPTR
inc R0 ; Increment the number of bytes in FIFO
djnz gbFControlBufferBytesLeft+1, RAMCheckMaxPacket ; If not zero, the continue.
RAMCheckUpper1:
mov A, gbFControlBufferBytesLeft ; If upper byte of gbFControlBufferBytesLeft is also zero, buffer is empty.
jz ControlTxUpd ; Are we done with the buffer
dec A ; If it's not zero dec. the upper byte as well.
mov gbFControlBufferBytesLeft, A ; And store it.
RAMCheckMaxPacket:
cjne R0, #EP0_MAX_PACKET_SIZE, DataInRAM ; Loop until FIFO is Full
ControlTxUpd:
mov gbFControlBufferLocation+1, DPH ; Update read pointers.
mov gbFControlBufferLocation+2, DPL
ControlArmTx:
mov TXCNTL, R0 ; Write count into TXCNT register
setb TXOE ; Enable data transmit
ReturnLoadCntl:
pop DPX
pop R0
Ret
;COMMENT *------------------------------------------------------------
;Function name : INIT_FUNCTION_EP0
;Brief Description : Initialize USB SFRs
;Regs preserved : No reg. is saved
;--------------------------------------------------------------------*
;SCOPE
INIT_FUNCTION_EP0: ; EP0 Comes up as it should except that
; all flow control is turned off except for
; OE bits. This will turn them on so we can
; accept all data.
; All other endpoints should not be configured
; until a Set Configuration command is given.
push EPINDEX
mov EPINDEX, #00
mov TXCON, #04h ; TX FIFO
mov RXCON, #04h ; RX FIFO
mov EPCON, #03Fh ; EP Control
orl IEN0, #085h ; Enable Interrupts
; orl IEN1, #07h -- already enabled in hub
orl FIE, #0EFh
orl SOFH, #020h ; Make sure SOFIE is set
orl IPL0, #00h ; Set interrupt priority
orl IPH0, #00h
orl IPL1, #02h
orl IPH1, #00h
pop EPINDEX
ReturnInitUSB:
Ret
;COMMENT *------------------------------------------------------------
;Function name : INIT_VARIABLES
;Brief Description : Initializes global variables
;Regs preserved : No reg. is saved
;--------------------------------------------------------------------*
;SCOPE
INIT_VARIABLES:
;Init SETUP VARIABLES
mov R0, #00h
mov Heart1, R0
mov Heart1+1, R0
mov gbSetupSeqRX, R0 ; SetupSeq is set to
mov gbSetupSeqTX, R0 ; STATUS_PHASE
mov gbFControlBufferLocation, R0
mov gbFControlBufferLocation+1, R0
mov gbFControlBufferLocation+2, R0
mov gbFControlBufferBytesLeft, R0
mov WR0, #0 ; Zero Out Counter
mov WR2, WR0
mov EP1_TX_COUNTER, DR0
mov EP2_TX_COUNTER, DR0
mov EP3_TX_COUNTER, DR0
mov EP1_TX_ERR_COUNTER, DR0
mov EP2_TX_ERR_COUNTER, DR0
mov EP3_TX_ERR_COUNTER, DR0
mov EP1_RX_ERR_COUNTER, DR0
mov EP2_RX_ERR_COUNTER, DR0
mov EP3_RX_ERR_COUNTER, DR0
mov RWUTimer, DR0
mov Ep1Tx_ERR, R0
mov Ep1Tx_OVF, R0
mov Ep1Tx_URF, R0
mov Ep1Rx_ERR, R0
mov Ep1Rx_OVF, R0
mov Ep1Rx_URF, R0
mov Ep2Tx_ERR, R0
mov Ep2Tx_OVF, R0
mov Ep2Tx_URF, R0
mov Ep2Rx_ERR, R0
mov Ep2Rx_OVF, R0
mov Ep2Rx_URF, R0
mov Ep3Tx_ERR, R0
mov Ep3Tx_OVF, R0
mov Ep3Tx_URF, R0
mov Ep3Rx_ERR, R0
mov Ep3Rx_OVF, R0
mov Ep3Rx_URF, R0
; EP1 Loop back varibales
mov Ep1BytesInBuffer , WR0
mov WR0, #Ep1LoopBackBuffer
mov Ep1WritePointer, WR0
mov Ep1ReadPointer, WR0
; EP2 Loop back varibales
xrl WR0, WR0
mov Ep2BytesInBuffer , WR0
mov WR0, #Ep2LoopBackBuffer
mov Ep2WritePointer, WR0
mov Ep2ReadPointer, WR0
; EP3 Loop back varibales
xrl WR0, WR0
mov Ep3BytesInBuffer , WR0
mov WR0, #Ep3LoopBackBuffer
mov Ep3WritePointer, WR0
mov Ep3ReadPointer, WR0
ReturnInit:
Ret
;COMMENT *------------------------------------------------------------
;Function name : RightCylon & LeftCylon
;Brief Description : Does a cylong pattern on the LEDs
;Regs preserved : No reg. is saved
;--------------------------------------------------------------------*
;========================================================================
; Right Cylon Pattern on Port1
;========================================================================
RightCylon:
push WR2
push ACC
mov WR2, #00
mov A, #80h
CylonRightLoop:
inc WR2, #1
cmp R2, #20h
jne CylonRightLoop
srl R11
mov P1, A
mov WR2, #00h
jnb ACC.0, CylonRightLoop
pop ACC
pop WR2
ret
;========================================================================
; Left Cylon Pattern on Port1
;========================================================================
LeftCylon:
push WR2
push ACC
mov WR2, #00
mov A, #01h
CylonLeftLoop:
inc WR2, #1
cmp R2, #20h
jne CylonLeftLoop
sll R11
mov P1, A
mov WR2, #00h
jnb ACC.7, CylonLeftLoop
pop ACC
pop WR2
ret
;========================================================================
;========================================================================
;************************************************************************
;------------------------------------------------------------------------
;EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
;EE ENDPOINT 1 ISR.
;EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
;------------------------------------------------------------------------
;************************************************************************
;COMMENT *------------------------------------------------------------
;Function name : EP1_TX_ISR
;Brief Description : Acts as an Infinite source of 32 byte data packets.
; : Each data packet has an incremented DWORD varaiable in
; : it.
;Regs preserved : No reg. is saved
;--------------------------------------------------------------------*
;
EP1_TX_ISR:
; First check to see if there is room in the FIFO
EP1TXCheckEveryThing:
anl FIFLG, #EP1_TX_CLR ; CLear Interrupt Pending Flag
jb TXERR, HandleTX1Error
jnb TXFIF0, RoomAvailable
jnb TXFIF1, RoomAvailable ; Use if double buffered
sjmp NoRoomAvailable
RoomAvailable:
push DR0
mov DR0, EP1_TX_COUNTER
mov A, #(EP1_TX_FIFO_SIZE/8)
DWORD_LOOP:
mov TXDAT, R3
mov TXDAT, R2
mov TXDAT, R1
mov TXDAT, R0
mov TXDAT, R3
mov TXDAT, R2
mov TXDAT, R1
mov TXDAT, R0
djnz ACC, DWORD_LOOP
mov TXCNTH, #HIGH (EP1_TX_FIFO_SIZE) ; Write the high byte first. This only needs to
; be done on EP1
mov TXCNTL, #LOW (EP1_TX_FIFO_SIZE)
inc DR0, #01
mov EP1_TX_COUNTER, DR0
pop DR0
sjmp EP1TXCheckEveryThing ; Since this is a bulk EP, go see if we need to do more stuff.
HandleTX1Error:
orl EPCON, #SET_IN_STALL_MASK
NoRoomAvailable: ; At this point the stack needs to be cleaned up.
ret
;************************************************************************
;------------------------------------------------------------------------
;EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
;EE ENDPOINT 2 ISR.
;EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
;------------------------------------------------------------------------
;************************************************************************
;COMMENT *------------------------------------------------------------
;Function name : EP2_TX_ISR
;Brief Description : Acts as an Infinite source of 8 byte ISOC data packets.
; : Each data packet has an incremented DWORD varaiable in
; : it along with the current SOF Value.
;Regs preserved : No reg. is saved
;--------------------------------------------------------------------*
;
EP2_TX_ISR:
;************************************************************************
;------------------------------------------------------------------------
;EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
;EE ENDPOINT 3 ISR.
;EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
;------------------------------------------------------------------------
;************************************************************************
;COMMENT *------------------------------------------------------------
;Function name : EP3_TX_ISR
;Brief Description : Acts as an Infinite source of 32 byte data packets.
; : Each data packet has an incremented DWORD varaiable in
; : it.
;Regs preserved : No reg. is saved
;--------------------------------------------------------------------*
;
EP3_TX_ISR:
; First check to see if there is room in the FIFO
EP3TXCheckEveryThing:
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