usbasm.txt

cy7c64113的汇编usb源码,质量很高,

;*******************************************************************************
;	File: HC12 Interface2 (filename: usbasm.asm) 
;	
;	Purpose:  
;       1. Receive/send data from/to HC12 by HAPI
;	  2. Drive printer
;       3. Receive/send data from/to PC by USB
;		
;	Port Signal Definines: 
;	  1. Printer:
;	     P3.bit[7:0] as Printer Data Port	
;	     Input: DAC.bit[0] as *ERROR, DAC.bit[1] as BUSY, DAC.bit[2] as *ACK
; 	     Output: P2.bit[0] as *INIT, P2.bit[1] as *AUTPFD, P2.bit[7] as *STROBE
;	
;	  2. HAPI:
;          P0.bit[7:0] as HAPI Data Bus
;          P1.bit[2:0] as Address Bus (read only)  
;          Input: P2.bit[4] as *STB, P2.bit[5] as *RD, P2.bit[6] as *CS
;          Output: P2.bit[2] as *LMPTY (IRQ2), P2.bit[3] as *DRDY (IRQ1)
;     
;	USB Endpoints Definines:   
;       1. Endpoint0: control endpoint
;	  2. Endpoint1: Bulk IN mode (Device->Host)
;       3. Endpoint2: Bulk OUT mode (Host->Device)
;
;	                                     
;****************************************************************************** 
;   Version Notes: Version 1.32
;   
;	       
;    1.  Added HAPI_int interrupt handler to receive/send
;        data from/to HC12 and parallel printer. 	
;
;    2.  Modified MainLoop.
;	
;    3.  Modified HAPI_int and MainLoop to match NEW LPT/USB 
;	   interface protocol. 
;
;    4.  The first version(1.0) be burned into silicon chip. 
;	  
;    5.  Added function to check USB status. 
;        
;	
;    6.  Fixed the BUG found at put_send_buffer Function, 	
;        modified HAPI_int (byte_2) and send_to_HC12 Function. 
;        ( Version 1.1) 
;
;    7.  Fixed the watch-dog reset( when USB cable plug-in) problem
;        ( Version 1.2) 
;
;    8.  Changed EP1 to IN mode and EP2 to OUT mode.  			            	
;        ( Version 1.3)    
;
;    9.  Put received HC12 data to endpoint1 buffers directly, no send_data routine.  
;        Disable EP1 and EP2 Interrupts after IN or OUT packet sending or receiving.  
;        (Version 1.31)
;  				
;    10. Add bit7 UREADY on BYTE4 STATUS Register to indicate if this firmware version 
;	   supports USB or not (add at Aug,20 2001) This bit7 is always 0 on previous 
;	   firmware versions. ( Version 1.32)	
;
;                                	   
; 	 Software #:   90-007-0025
;      	 Firmware #:   90-207-0100
;
;*****************************************************************************
;**************** Assembler Directives *************************************** 

lable:

CPU	64113

XPAGEON

; processor registers

Port0:			equ  00h
Port1:			equ  01h
Port2:			equ  02h
Port3:			equ  03h
Port0_int:			equ  04h
Port1_int:			equ  05h
Port2_int:			equ  06h
Port3_int:			equ  07h

GPIO_cfg:			equ  08h
HAPI_I2C_cfg:		equ  09h

USB_address:		equ  10h
EP0_counter:		equ  11h
EP0_mode:			equ  12h
EP1_counter:		equ  13h
EP1_mode:			equ  14h
EP2_counter:		equ  15h
EP2_mode:			equ  16h
EP3_counter:		equ  41h
EP3_mode:			equ  42h
EP4_counter:		equ  43h
EP4_mode:			equ  44h
USB_ctl:			equ  1fh

Global_int:			equ  20h
EP_int:			equ  21h
Int_vec:			equ  23h

Timer_lo:			equ  24h
Timer_hi:			equ  25h
WDT:				equ  26h

I2C_ctl:			equ  28h
I2C_data:			equ  29h

DAC_data:			equ  30h
;DAC_int:			equ  31h
;DAC_intp:			equ  32h

CPU_ctl:			equ  0ffh

;====================================================
; RAM MAP:
;  -------------------------------------------
; | 00->xx: reserve for PSP (xx<20)           |
; | xx->20: reserve for DSP (xx<20) 32 bytes  |
; | 21->3F: 32 bytes Data Memory Variables    |
; | 40->5F: 32 bytes received data from PC    |
; | 60->7F: 32 byets send_data to PC          |
; | A8->FF: ENDPOINT FIFOs                    |
;  -------------------------------------------
;====================================================

; Endpoint Buffer Allocation (USB_ctl bit[7:6]=[1,0])

EP0_buffer0:		equ  0b8h
EP0_buffer1:		equ  0b9h
EP0_buffer2:		equ  0bah
EP0_buffer3:		equ  0bbh
EP0_buffer4:		equ  0bch
EP0_buffer5:		equ  0bdh
EP0_buffer6:		equ  0beh
EP0_buffer7:		equ  0bfh

EP1_buffer0:		equ  0c0h	; total 32 bytes 0C0-0DF
EP1_buffer1:		equ  0c1h
EP1_buffer2:		equ  0c2h
EP1_buffer3:		equ  0c3h
EP1_buffer4:		equ  0c4h
EP1_buffer5:		equ  0c5h
EP1_buffer6:		equ  0c6h
EP1_buffer7:		equ  0c7h
; ...
EP1_buffer31:		equ  0dfh

EP2_buffer0:		equ  0e0h	; total 32 bytes 0E0-0FF
EP2_buffer1:		equ  0e1h
EP2_buffer2:		equ  0e2h
EP2_buffer3:		equ  0e3h
EP2_buffer4:		equ  0e4h
EP2_buffer5:		equ  0e5h
EP2_buffer6:		equ  0e6h
EP2_buffer7:		equ  0e7h
; ...
EP2_buffer31:		equ  0ffh

; USB Mode Encoding

disabled:			equ  00h
nak:				equ  01h
stall:			equ  03h
ignore:			equ  04h
con_rd_ack:			equ  0Fh
con_rd_nak:			equ  0Eh
con_rd_stall:		equ  02h
con_wr_ack:			equ  0Bh
con_wr_nak:			equ  0Ah
con_wr_stall:		equ  06h
out_ack:			equ  09h
out_nak:			equ  08h
out_iso:			equ  05h
in_ack:			equ  0Dh
in_nak:			equ  0Ch
in_iso:			equ  07h

; USB Stardard Request Types:

get_status:			equ  00h
clear_feature:		equ  01h
set_feature:		equ  03h
set_address:		equ  05h
get_descriptor:		equ  06h
set_descriptor: 		equ  07h
get_configuration:	equ  08h
set_configuration:	equ  09h
get_interface:		equ  0Ah
set_interface:		equ  0Bh
synch_frame:		equ  0Ch

get_deviceID:  		equ  00h	; printer device only
get_portstatus:		equ  01h	; printer device only

device_status:		equ  00h
endpoint_status: 		equ  00h
endpoint_stalled:		equ  00h
device_remote_wakeup:	equ  01h

; USB Standard Descriptor Types:

device:			equ  01h
configuration:		equ  02h
string:			equ  03h
interface:			equ  04h
endpoint:			equ  05h

; USB Class Specific Descriptor Types

HID:				equ  21h
report:			equ  22h
physical:			equ  23h

; USB Class Specific Request Codes

get_report:			equ  01h
get_idle:			equ  02h
get_protocal:		equ  03h
set_report:			equ  09h
set_idle:			equ  0ah
set_protocal:		equ  0bh

; BYTE Type for HAPI Port 1.bit[0.1.2] ref [A0.A1.A2]

HAPI_PDOUT:			equ  00h	; HAPI parallel data out register address
HAPI_UDOUT:			equ  01h	; HAPI USB data out register address
HAPI_UDIN:			equ  02h	; HAPI USB data in register address
HAPI_CTRL:			equ  03h	; HAPI control register address
HAPI_STAT:			equ  04h	; HAPI Status register address

; Data bit for HAPI_STAT Register (printer and USB device status):

HAPI_PTDRE:			equ  01h	; [0000,0001],bit0,parallel transmit data register empty	
HAPI_UTDRE:			equ  02h	; [0000,0010],bit1,usb transmit data register empty
HAPI_URDRF:			equ  04h	; [0000,0100],bit2,usb receive data register full
HAPI_PBUSY:			equ  08h	; [0000,1000],bit3,printer busy (physical device status)
HAPI_UBUSY:			equ  10h	; [0001,0000],bit4,usb port busy(physical device status)
HAPI_PERROR:		equ  20h	; [0010,0000],bit5,printer error(CY device status)
HAPI_UERROR:		equ  40h	; [0100,0000],bit6,usb port error(CY device status)
HAPI_UREADY:		equ  80h    ; [1000,0000],bit7,usb port ready (firmware);;(add at Aug,20 2001)

HAPI_PRDY:			equ  0d7h   ; [1101,0111], bit5, bit3, printer ready 

; Data bit for HAPI_CTRL Register (HC12 Request):

HAPI_PTIE:			equ  01h	; [0000,0001],bit0,printer transmit data IRQ enable
HAPI_UTIE:			equ  02h	; [0000,0010],bit1,usb transmit data IRQ enable
HAPI_URIE:			equ  04h	; [0000,0100],bit2,usb receive data IRQ enable
HAPI_ULAST:			equ  08h	; [0000,1000],bit3,usb last byte of message indicator(USB only)
HAPI_PENABLE:		equ  10h	; [0001,0000],bit4,printer enable 
HAPI_UEBANLE:		equ  20h	; [0010,0000],bit5,usb enable

; Command Terminator (send by PC):

COMM_END:			equ  80h	; command terminator

; USB Detect
BUS_activity_clean:	equ  0f7h	; data for clean bus_activity bit [1111,0111] USB_ctl.bit3

; Data Memory Variables: (Space from 21h-3fh, 64 bytes)

delay_time:			equ  21h	; 0ffh=390us (almost)
perror_counter:		equ  22h	; counter for recording printer error times
pbusy_counter:		equ  23h  	; counter for recording printer busy times
;pre_setup:			equ  24h
loop_counter:		equ  25h
;bus_active:		equ  26h
byte_type:			equ  27h	; temp buffer for restoring Port1 data 
EP0_data_toggle:		equ  28h
EP1_data_toggle:		equ  29h	; mod at July,26,2001
EP2_data_toggle: 		equ  2ah
data_start:			equ  2bh	; USB RAM table start point
data_count:			equ  2ch	; USB RAM table length
;EP2_recv:			equ  2dh	; set by ep2, clear by mainloop
;counter_1:			equ  2eh
endpoint_stall:		equ  2fh

printer_RDY:		equ  30h	; flag, set indicate that printer is not ready
send_data_ok:		equ  31h	; flag, set indicate that received 32 bytes data from HC12
recvpc_data_ok:		equ  32h	; flag, set indicate that received 32 bytes data from EP1

data_count_8:		equ  33h	; flag, set indicate a mutiple 8 bytes packet
config_status:		equ  34h	; USB configuration status
bus_reset_flag:		equ  35h	; flag, set indicate a bus reset event. 
temp_print_data:		equ  36h	; temp buffer for storing printer data
;data_type:			equ  37h	; HAPI data type
send_data_counter:	equ  38h	; counter for counting data received from HC12
HC12_data_counter:	equ  39h	; counter for counting data that need to send to HC12

;port1_temp:		equ  3ah	; Port1 temp data 
HAPI_CTRL_reg:		equ  3bh	; HAPI Control Register

;HC12_write_flag:		equ  3ch	; flag, set indicate that HC12 write data to port0
rcvdata_length:		equ  3ch	; EP2 received data length

HAPI_STAT_reg:		equ  3dh	; HAPI device status register
HAPI_UDIN_reg:		equ  3eh	; HAPI USB data in register 

; Data Transmission Buffers Allocation:

recvpc_data0:		equ  40h	; (data length 32 bytes 40-5f)
recvpc_data1:		equ  41h	; received from PC by EP1 and need be sent to HC12
recvpc_data2:		equ  42h
recvpc_data3:		equ  43h
recvpc_data4:		equ  44h
recvpc_data5:		equ  45h
recvpc_data6:		equ  46h
recvpc_data7:		equ  47h
;...
recvpc_data31:		equ  5fh

send_data0:			equ  60h	; (data length 32 bytes 60-7f)
send_data1:			equ  61h    ; received from HC12 and need be sent to PC by EP2
send_data2:			equ  62h
send_data3:			equ  63h
send_data4:			equ  64h
send_data5:			equ  65h
send_data6:			equ  66h
send_data7:			equ  67h
;...
send_data31:		equ  7fh

;*************** interrupt vector table ****************

ORG 	00h			

jmp	reset				; reset vector		

jmp	bus_reset			; USB bus reset interrupt

jmp	unused_int 			; 128-us interrupt (disable)

jmp	1ms_int         		; 1.024-ms interrupt(watch dog reset)

jmp	endpoint_zero		; endpoint 0 interrupt(control)

jmp	endpoint_one		; endpoint 1 interrupt (IN Endpoint, Send data to PC)

jmp	endpoint_two		; endpoint 2 interrupt (OUT Endpoint, Receive data from PC)

jmp	unused_int 			; endpoint 3 interrupt (disable)

jmp	unused_int			; endpoint 4 interrupt (disable)

jmp	error				; not implemented in this version

jmp	unused_int			; DAC interrupt (disable)

jmp	HAPI_int			; HAPI/GPIO interrupt 

jmp	unused_int			; I2C interrupt (dsiable)


;************** program listing ************************

ORG  1Ah

error: halt

;*******************************************************
;	Interrupt handler: reset
;	Purpose: The program jumps to this routine when
;		 the microcontroller has a power on reset.
;*******************************************************

reset:
	mov A, 20h
	swap A, dsp			; sets data memory stack pointer
	mov A, 00h

;clear variable memory	

      mov X, 1fh

clear_ram_loop:		
      mov [X + recvpc_data0], A ; clear RAM  
	mov [X + send_data0], A
      dec X
	jnc clear_ram_loop

        
      mov [EP0_data_toggle], A
;---------- mod at July,26,2001 ---------
       
      mov [EP1_data_toggle], A

;---------- mod end at July,26,2001 ---------

      mov [EP2_data_toggle], A

      mov [data_start], A
	mov [data_count], A
;	mov [EP2_recv], A
;	mov [counter_1], A
      mov [loop_counter], A
 
	mov [byte_type], A

	mov [endpoint_stalled], A
;	mov [bus_active], A

	mov [send_data_ok], A
	mov [recvpc_data_ok], A
	
	mov [data_count_8], A
	mov [config_status], A
	mov [bus_reset_flag], A
      mov [temp_print_data], A
;	mov [data_type], A
	mov [HC12_data_counter], A

	mov [send_data_counter], A

;	mov [port1_temp], A
	mov [HAPI_CTRL_reg], A
;	mov [HC12_write_flag], A
	mov [rcvdata_length], A
	
	mov [printer_RDY], A
	mov [perror_counter], A
	mov [pbusy_counter], A
	mov [delay_time], A

	mov [HAPI_UDIN_reg], A

	mov A, 7bh			; init HAPI_STAT_reg register, [0111,1011]
	or A, HAPI_UREADY		; This firmware version supports USB ;;(add at Aug,20 2001)
	mov [HAPI_STAT_reg], A  ; USB,printer BUSY,ERROR and PTDRE=1, UTDRE=1, URDRF=0 

	
;----------------------------------------
; Initilization ports 
;----------------------------------------

	mov A, 0ch			; [0000,1100]00h
     	iowr GPIO_cfg		; set all ports to open-drain mode
	mov A, 0ffh
     	iowr DAC_data		; disable DAC port output current sink
	
	mov A, 0ffh
	iowr Port1

;----------------------------------------
; HAPI Configuration
;----------------------------------------

      iord HAPI_I2C_cfg 	; set HAPI operation enable and 16 bit data width
      and A, 0feh			; x[1111,1110], +[0011,0010]
      or A, 32h  ;32h   	; set both DRDY and LEMPTY polariyh to 1
					; DataReady bit [2]=1 (when Data is ready)
                             	; LatchEmpty bit [3]=0 (when port is full)    
      iowr HAPI_I2C_cfg		; and causes printer control bit P2[0.1.7] CMOS out mode 	

;----------------------------------------
; USB Configuration
;----------------------------------------

;	iord USB_ctl		
;	and A, 78h			; set Not Forcing control action bit[0:2]=[000] [0111,1000]
;	or A, 40h			; set endpoint memory allocation bit[7,6]=[0,1] [0100,0000]
;	iowr USB_ctl

	iord USB_ctl		
	and A, 38h			; set Not Forcing control action bit[0:2]=[000] [0011,1000]
	or A, 80h			; set endpoint memory allocation bit[7,6]=[1,0] [1000,0000]
	iowr USB_ctl

;----------------------------------------
; Interrupts and CPU status_control Initilization
;----------------------------------------

;	iord CPU_ctl	
;	and A, 0f7h     		; set suspend bit[3]=0, [1111,0111]
;	or A, 71h 			; set WDG reset[6], BUS reset[5], PowerOn reset[4], RUN bit[0]=1, [0111,0001]
;	iowr CPU_ctl

	mov A, 25h		 	; enable USB_bus reset, 1ms and HAPI interrupts[0010,0101]
	iowr Global_int

	mov A, 07h 			; enable EP0, EP1, EP2 interrupts [0000,0111]
	iowr EP_int

	ei				; enable interrupts
	

;-------------------------------------
; End of Reset
;-------------------------------------
;	call prepare_EP
	
	mov A, 00h			; clean EP0 FIFO buffers
	mov [EP0_buffer0], A
	mov [EP0_buffer1], A
	mov [EP0_buffer2], A
	mov [EP0_buffer3], A
	mov [EP0_buffer4], A
	mov [EP0_buffer5], A
	mov [EP0_buffer6], A
	mov [EP0_buffer7], A

	mov A, [bus_reset_flag]	; verifiy USB BUS_Reset Flag set or not
	cmp A, 01h			; to make sure that firmware can run even 
	jnz main 			; without USB connection (just communicate with HC12)	
					
	mov A, 00h			; if BUS_Reset occured, So have to wait setup completed
	mov [bus_reset_flag], A

waitconfig:
	iord EP1_mode		; test if configured
	and A, 0fh
	cmp A, 00h
	jz  waitconfig

;*******************************************************
;*******************************************************
;**   	Main Loop		                        ** 
;**	      Purpose: The main loop                    **
;*******************************************************
;*******************************************************
main:	

	call get_USB_status		; get USB bus Status	

	mov A, [recvpc_data_ok]		; check received data from EP1(PC) or not
	cmp A, 01h				; flag was set by endpoint_two interrupt handler
	jnz loop

	mov A, 00h				; prepare to send data to HC12
	mov [recvpc_data_ok], A
	mov [HC12_data_counter], A
	
	mov A, [HAPI_STAT_reg]		; sets URDRF bit
	or A, HAPI_URDRF
	mov [HAPI_STAT_reg], A

loop:   
      jmp main