usbjoy32.asm

HID规范和一个基于CYPRESS FX2 的例子

	mov 	A, ffh					; bug fix by DEF
	and 	A, [new_task]				; new_task is active if = 0
	jnz 	TaskLoop				; wait for next time slice
	inc 	[new_task]

	mov	A, [configuration]
	cmp	A, 01h
	jnz	no_event_task

	mov	A, [ep1_stall]
	cmp	A, FFh
	jz	no_event_task	

	mov 	A, [task_number]			; jump to current tasklet
	asl						; x2 because jmp is 2 instructions
	cmp 	A, (end_task_table - task_table)	; check to ensure not out of range

	jc 	.DoTheJump
	mov 	A, 00h
	mov 	[task_number], A			; user may want to add own error recovery code here

.DoTheJump:
	jacc task_table					; execute the selected task

XPAGEOFF
task_table:
	jmp 	Task0
	jmp 	Task1
	jmp 	Task2
	jmp 	Task3
	jmp 	Task4
	jmp 	Task5
	jmp 	Task6
	jmp 	Task7
	jmp 	Task8
	jmp 	Task9
	jmp 	Task10
	jmp 	Task11
	jmp 	Task12
	jmp 	Task13
	jmp 	Task14
	jmp 	Task15
end_task_table:
XPAGEON

no_event_task:

	jmp 	TaskLoop

;=========================================================
;	Task 0:	Read Resistor Value for x_R1
;=========================================================

Task0:

	mov a, 30h
        iowr Global_Interrupt		;Enable only Capture interrupts

     ;**********************************************
     ;P0.0 = CMOS Hi-Z
     ;P0.1 = TTL Hi-Z
     ;P0.2 = High Sink
     ;P0.3/P0.4/P0.5/P0.6/P0.7 = CMOS Hi-Z
     ;Port0_Mode0 = 00000100
     ;Port0_Mode1 = 00000100
     ;Port0       = 00000010
     ;**********************************************

        mov a, 04h			;Set port and port mode values to discharge capacitor
        iowr Port0_Mode0		;See table above
        iowr Port0_Mode1
        mov a, 02h
        iowr Port0

	mov a, 00h			;wait about 500usec (6000 cycles) for Capture_timer A & B ISRs, then recharge cap and do math below
	mov [discharge_cnt], a
	.discharge_loop:
	    inc [discharge_cnt]
	    mov a, CCh
	    cmp a, [discharge_cnt]
	    iowr Watchdog
	    jnz .discharge_loop

	mov a, 00h
	iowr Global_Interrupt		;Disable global interrupts

	mov a, 00h
	mov [rollover_bit], a		;rollover_bit set to 00h, but may need to change to 01h, if TTL value is < CMOS value

	iord Capture_TimerA_Falling	;Read CaptureTimerA 8 bits, CMOS captured time value (always earlier and usually the smaller value)
	mov [capture_a_temp], a
	iord Capture_TimerB_Falling	;Read CaptureTimerB 8 bits, TTL captured time value (always earlier and usually the larger value)
	mov [capture_b_temp], a

	sub a, [capture_a_temp]		;Subtract CMOS time from TTL time to see if timer rolled over
	jnc .no_timer_rollover		;If TTL value is > CMOS value, the timer did not roll over and we keep rollover_bit = 00h

	mov a, 01h			;In the exception that TTL time value is < CMOS time value, we make rollover_bit = 01h
	mov [rollover_bit], a	
	
	.no_timer_rollover:
        mov a, FEh			;Recharges the capacitor, P0.0 is Hi-Z CMOS always, others set to Strong Drive CMOS
        iowr Port0_Mode0
        iowr Port0_Mode1
        iowr Port0    
                
	SUB16x16 rollover_bit, capture_b_temp, 00h, capture_a_temp, always_zero, x_R1_diff1_new

	mov a, 05h          		;Re-Enable 1ms,USBReset interrupts
        iowr Global_Interrupt

        jmp TaskLoop

;=========================================================
;	Task 1: Read Resistor Value for x_R2
;=========================================================

Task1:

	mov a, 30h
        iowr Global_Interrupt		;Enable only Capture interrupts

     ;**********************************************
     ;P0.0 = CMOS Hi-Z
     ;P0.1 = TTL Hi-Z
     ;P0.2 = CMOS Hi-Z
     ;P0.3 = High Sink
     ;P0.4/P0.5/P0.6/P0.7 = CMOS Hi-Z
     ;Port0_Mode0 = 00001000
     ;Port0_Mode1 = 00001000
     ;Port0       = 00000010
     ;**********************************************
        mov a, 08h			;Set port and port mode values to discharge capacitor
        iowr Port0_Mode0		;See table above
        iowr Port0_Mode1
        mov a, 02h
        iowr Port0
        
	mov a, 00h			;wait about 500usec (6000 cycles) for Capture_timer A & B ISRs, then recharge cap and do math below
	mov [discharge_cnt], a
	.discharge_loop:
	    inc [discharge_cnt]
	    mov a, CCh
	    cmp a, [discharge_cnt]
	    iowr Watchdog
	    jnz .discharge_loop 

	mov a, 00h
	iowr Global_Interrupt		;Disable global interrupts

	mov a, 00h
	mov [rollover_bit], a		;rollover_bit set to 00h, but may need to change to 01h, if TTL value is < CMOS value

	iord Capture_TimerA_Falling	;Read CaptureTimerA 8 bits, CMOS captured time value (always earlier and usually the smaller value)
	mov [capture_a_temp], a
	iord Capture_TimerB_Falling	;Read CaptureTimerB 8 bits, TTL captured time value (always earlier and usually the larger value)
	mov [capture_b_temp], a

	sub a, [capture_a_temp]		;Subtract CMOS time from TTL time to see if timer rolled over
	jnc .no_timer_rollover		;If TTL value is > CMOS value, the timer did not roll over and we keep rollover_bit = 00h

	mov a, 01h			;In the exception that TTL time value is < CMOS time value, we make rollover_bit = 01h
	mov [rollover_bit], a	
	
	.no_timer_rollover:
        mov a, FEh			;Recharges the capacitor, P0.0 is Hi-Z CMOS always, others set to Strong Drive CMOS
        iowr Port0_Mode0
        iowr Port0_Mode1
        iowr Port0    
                
	SUB16x16 rollover_bit, capture_b_temp, 00h, capture_a_temp, always_zero, x_R2_diff1_new

        mov a, 05h          		;Re-Enable 1ms,USBReset interrupts
        iowr Global_Interrupt

        jmp TaskLoop


;========================================================
;	Task 	2:	read fire buttons
;========================================================

Task2:
	iord 	Port1
	and 	A, ffh
	mov 	[button_debounce], A
	
	jmp 	TaskLoop

;=========================================================
;	Task 3: Read Resistor Value for y_R1
;=========================================================

Task3:

	mov a, 30h
        iowr Global_Interrupt		;Enable only Capture interrupts

     ;**********************************************
     ;P0.0 = CMOS Hi-Z
     ;P0.1 = TTL Hi-Z
     ;P0.4 = High Sink
     ;P0.2/P0.3/P0.5/P0.6/P0.7 = CMOS Hi-Z
     ;Port0_Mode0 = 00010000
     ;Port0_Mode1 = 00010000
     ;Port0       = 00000010
     ;**********************************************

        mov a, 10h			;Set port and port mode values to discharge capacitor
        iowr Port0_Mode0		;See table above
        iowr Port0_Mode1
        mov a, 02h
        iowr Port0

	mov a, 00h			;wait about 500usec (6000 cycles) for Capture_timer A & B ISRs, then recharge cap and do math below
	mov [discharge_cnt], a
	.discharge_loop:
	    inc [discharge_cnt]
	    mov a, CCh
	    cmp a, [discharge_cnt]
	    iowr Watchdog
	    jnz .discharge_loop 

	mov a, 00h
	iowr Global_Interrupt		;Disable global interrupts

	mov a, 00h
	mov [rollover_bit], a		;rollover_bit set to 00h, but may need to change to 01h, if TTL value is < CMOS value

	iord Capture_TimerA_Falling	;Read CaptureTimerA 8 bits, CMOS captured time value (always earlier and usually the smaller value)
	mov [capture_a_temp], a
	iord Capture_TimerB_Falling	;Read CaptureTimerB 8 bits, TTL captured time value (always earlier and usually the larger value)
	mov [capture_b_temp], a

	sub a, [capture_a_temp]		;Subtract CMOS time from TTL time to see if timer rolled over
	jnc .no_timer_rollover		;If TTL value is > CMOS value, the timer did not roll over and we keep rollover_bit = 00h

	mov a, 01h			;In the exception that TTL time value is < CMOS time value, we make rollover_bit = 01h
	mov [rollover_bit], a	
	
	.no_timer_rollover:
        mov a, FEh			;Recharges the capacitor, P0.0 is Hi-Z CMOS always, others set to Strong Drive CMOS
        iowr Port0_Mode0
        iowr Port0_Mode1
        iowr Port0    
        
	SUB16x16 rollover_bit, capture_b_temp, 00h, capture_a_temp, always_zero, y_R1_diff1_new

        mov a, 05h          		;Re-Enable 1ms,USBReset interrupts
        iowr Global_Interrupt   

        jmp TaskLoop


;===========================================================
;	
;	Task 4:  Read Resistor Value for y_R2
;============================================================

Task4:

	mov a, 30h
        iowr Global_Interrupt		;Enable only Capture interrupts

     ;**********************************************
     ;P0.0 = CMOS Hi-Z
     ;P0.1 = TTL Hi-Z
     ;P0.5 = High Sink
     ;P0.2/P0.3/P0.4/P0.6/P0.7 = CMOS Hi-Z
     ;Port0_Mode0 = 00100000
     ;Port0_Mode1 = 00100000
     ;Port0       = 00000010
     ;**********************************************
        mov a, 20h			;Set port and port mode values to discharge capacitor
        iowr Port0_Mode0		;See table above
        iowr Port0_Mode1
        mov a, 02h
        iowr Port0
        
	mov a, 00h			;wait about 500usec (6000 cycles) for Capture_timer A & B ISRs, then recharge cap and do math below
	mov [discharge_cnt], a
	.discharge_loop:
	    inc [discharge_cnt]
	    mov a, CCh
	    cmp a, [discharge_cnt]
	    iowr Watchdog
	    jnz .discharge_loop 

	mov a, 00h
	iowr Global_Interrupt		;Disable global interrupts

	mov a, 00h
	mov [rollover_bit], a		;rollover_bit set to 00h, but may need to change to 01h, if TTL value is < CMOS value

	iord Capture_TimerA_Falling	;Read CaptureTimerA 8 bits, CMOS captured time value (always earlier and usually the smaller value)
	mov [capture_a_temp], a
	iord Capture_TimerB_Falling	;Read CaptureTimerB 8 bits, TTL captured time value (always earlier and usually the larger value)
	mov [capture_b_temp], a

	sub a, [capture_a_temp]		;Subtract CMOS time from TTL time to see if timer rolled over
	jnc .no_timer_rollover		;If TTL value is > CMOS value, the timer did not roll over and we keep rollover_bit = 00h

	mov a, 01h			;In the exception that TTL time value is < CMOS time value, we make rollover_bit = 01h
	mov [rollover_bit], a	
	
	.no_timer_rollover:
        mov a, FEh			;Recharges the capacitor, P0.0 is Hi-Z CMOS always, others set to Strong Drive CMOS
        iowr Port0_Mode0
        iowr Port0_Mode1
        iowr Port0    
                
	SUB16x16 rollover_bit, capture_b_temp, 00h, capture_a_temp, always_zero, y_R2_diff1_new

        mov a, 05h          		;Re-Enable 1ms,USBReset interrupts
        iowr Global_Interrupt   

	jmp 	TaskLoop

;========================================
;	Task 5: Read Resistor Value for z_R1
;========================================

Task5:

	mov a, 30h
        iowr Global_Interrupt		;Enable only Capture interrupts

     ;**********************************************
     ;P0.0 = CMOS Hi-Z
     ;P0.1 = TTL Hi-Z
     ;P0.6 = High Sink
     ;P0.2/P0.3/P0.4/P0.5/P0.7 = CMOS Hi-Z
     ;Port0_Mode0 = 01000000
     ;Port0_Mode1 = 01000000
     ;Port0       = 00000010
     ;**********************************************

        mov a, 40h			;Set port and port mode values to discharge capacitor
        iowr Port0_Mode0		;See table above
        iowr Port0_Mode1
        mov a, 02h
        iowr Port0

	mov a, 00h			;wait about 500usec (6000 cycles) for Capture_timer A & B ISRs, then recharge cap and do math below
	mov [discharge_cnt], a
	.discharge_loop:
	    inc [discharge_cnt]
	    mov a, CCh
	    cmp a, [discharge_cnt]
	    iowr Watchdog
	    jnz .discharge_loop 

	mov a, 00h
	iowr Global_Interrupt		;Disable global interrupts

	mov a, 00h
	mov [rollover_bit], a		;rollover_bit set to 00h, but may need to change to 01h, if TTL value is < CMOS value

	iord Capture_TimerA_Falling	;Read CaptureTimerA 8 bits, CMOS captured time value (always earlier and usually the smaller value)
	mov [capture_a_temp], a
	iord Capture_TimerB_Falling	;Read CaptureTimerB 8 bits, TTL captured time value (always earlier and usually the larger value)
	mov [capture_b_temp], a

	sub a, [capture_a_temp]		;Subtract CMOS time from TTL time to see if timer rolled over
	jnc .no_timer_rollover		;If TTL value is > CMOS value, the timer did not roll over and we keep rollover_bit = 00h

	mov a, 01h			;In the exception that TTL time value is < CMOS time value, we make rollover_bit = 01h
	mov [rollover_bit], a	
	
	.no_timer_rollover:
        mov a, FEh			;Recharges the capacitor, P0.0 is Hi-Z CMOS always, others set to Strong Drive CMOS
        iowr Port0_Mode0
        iowr Port0_Mode1
        iowr Port0    
        
	SUB16x16 rollover_bit, capture_b_temp, 00h, capture_a_temp, always_zero, z_R1_diff1_new

        mov a, 05h          		;Re-Enable 1ms,USBReset interrupts
        iowr Global_Interrupt   

	jmp TaskLoop

;========================================
;	Task 6: Read Resistor Value for z_R2
;========================================

Task6:

	mov a, 30h
        iowr Global_Interrupt		;Enable only Capture interrupts

     ;**********************************************
     ;P0.0 = CMOS Hi-Z
     ;P0.1 = TTL Hi-Z
     ;P0.5 = High Sink
     ;P0.2/P0.3/P0.4/P0.6/P0.7 = CMOS Hi-Z
     ;Port0_Mode0 = 10000000
     ;Port0_Mode1 = 10000000
     ;Port0       = 00000010
     ;**********************************************
        mov a, 80h			;Set port and port mode values to discharge capacitor
        iowr Port0_Mode0		;See table above
        iowr Port0_Mode1
        mov a, 02h
        iowr Port0
        
	mov a, 00h			;wait about 500usec (6000 cycles) for Capture_timer A & B ISRs, then recharge cap and do math below
	mov [discharge_cnt], a
	.discharge_loop:
	    inc [discharge_cnt]
	    mov a, CCh
	    cmp a, [discharge_cnt]
	    iowr Watchdog
	    jnz .discharge_loop