?? jry9524_63723_asm.htm
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<BODY><PRE>;***************************************************************************
;
; File: 637mouse.asm
; Version: 1.02
; Description: This code provides both PS/2 and USB support for a combi
; mouse
; Target: Cypress CY7C63743
;
; Overview
; On power up, the firmware starts executing code at address 0h.
; After some housekeeping tasks it will determine whether it is attached to
; a USB or a PS2 interface. From that, it will branch either to USB_Main or
; PS2_Main.
;
; PS2 Overview
; There are four main tasks:
; * PS2_Main
; * buttons (common to USB and PS2)
; * optics (common to USB and PS2)
; * PS2_DoCommand - processing of PS2 commands from host
;
; PS2_Main
; This routine initializes the PS2 variables, the IO ports, computes
; the (X,Y) coordinates of mouse movement, the Z-coordinate of wheel motion,
; if needed, determines which button has been pressed and sends out a mouse
; packet to a host.
;
; PS2_DoCommand
; When a host wants to send data to the mouse it will drive the
; SDATA line low. The PS2_Main task will continuously poll it and will clock
; in the data. The latter will be parsed and processed.
;
; USB Overview
; There are also four main tasks:
; * USB_Main
; * buttons (common to USB and PS2)
; * optics (common to USB and PS2)
; * suspend/resume
;
; USB_Main
; This routine initializes the USB variables, the IO ports, the mouse
; logic, and the data space. All USB communication occurs on an interrupt
; basis.
;
; Endpoint 0 is used to support Control Transfers and vendor specific
; requests. During enumeration setup commands are sent to endpoint1 to
; initialize the USB device and to extract configuration information from the
; device
;
; Endpoint 1 is used to transfer interrupt data back to the host.
; In this case we transfer data from the button and optics back to the host.
;
; Buttons
; The buttons are polled every millisecond inside the 1ms handler and
; processed in the main task loop.
;
; Optics
; The optics for mouse mouvement (X,Y,Z) are continuously polled
; and processed in the main task loop. The quadrature state of the optics
; tells us which direction the mouse is moving in. This data is sent back to
; the host as an offset from the last time the mouse was polled for data by
; the host. Further, for PS/2, the optics will be polled and processed every
; time a bit is sent out or received. This prevents missing any optics count
; during PS2 data transfer.
;
; Suspend/Resume
; Every millisecond, the USB is polled for activity. If no activity
; occurs for three milliseconds, then it is assumed that the USB is in
; suspend. Because this device supports remote wakeup, pressing the buttons
; or moving the mouse causes the firmware to send resume signalling back
; to the host to wakeup and resume operation.
;
; Endpoint1 packet definition
; Byte Usage
; 0 Button Data 7-3 Not used, 2=middle, 1=right, 0=left
; 1 horizontal displacement measured via the optics
; 2 vertical displacement measured via the optics
; 3 z-displacement (wheel) measured via the optics
;
; Revisions:
; 10/09/00: Original Version. Taken from u5combi.asm, v.1.03
;
; 1.00
; Fixed the Chapter 9 Test - device remote wakeup
;
; 1.01
; Fixed the suspend current requirements by explicitly writing SUSPEND
; and RUN bits of the processor status control register when going into
; suspend
;
; 1.02
; Convert TABS into spaces. No code change.
;
;***************************************************************************
;
; Copyright 2000 Cypress Semiconductor
; This code is provided by Cypress as a reference. Cypress makes no
; claims or warranties to this firmware's suitability for any
; application.
;
;***************************************************************************
CPU 63743
XPAGEON
INCLUDE "637xx.inc"
INCLUDE "USB.inc"
INCLUDE "PS2.inc"
INCLUDE "macros.inc"
;
; Supported Interfaces
;
USB_MOUSE: equ 01h
PS2_MOUSE: equ 00h
;
; EP0 In-Transaction State Machine
;
EP0_IN_IDLE: equ 00h
CONTROL_READ_DATA: equ 02h
NO_DATA_STATUS: equ 04h
EP0_IN_STALL: equ 06h
;
; EP0 No-Data Control Flags
;
ADDRESS_CHANGE_PENDING: equ 00h
NO_CHANGE_PENDING: equ 02h
;
; Response Sizes
;
DEVICE_STATUS_LENGTH: equ 2
DEVICE_CONFIG_LENGTH: equ 1
ENDPOINT_STALL_LENGTH: equ 2
INTERFACE_STATUS_LENGTH: equ 2
INTERFACE_ALTERNATE_LENGTH: equ 1
INTERFACE_PROTOCOL_LENGTH: equ 1
;
; General Constants
;
BIT0: equ 01h
BIT1: equ 02h
BIT2: equ 04h
BIT3: equ 08h
BIT4: equ 10h
BIT5: equ 20h
BIT6: equ 40h
BIT7: equ 80h
;
; Interface Constants - they need to be redefined for a new hardware platform
;
DUAL_DSP_DATA: equ 20h ; top of data stack
; (for PUSH/POP instructions)
LEFT_BUTTON_PORT: equ PORT0
LEFT_BUTTON_MASK: equ BIT7
RIGHT_BUTTON_PORT: equ PORT1
RIGHT_BUTTON_MASK: equ BIT0
MIDDLE_BUTTON_PORT: equ PORT1
MIDDLE_BUTTON_MASK: equ BIT1
OPTICS_PORT: equ PORT0
X_LEFT_OPTICS_PORT: equ PORT0
X_LEFT_OPTICS_MASK: equ BIT0
X_RIGHT_OPTICS_PORT: equ PORT0
X_RIGHT_OPTICS_MASK: equ BIT1
Y_LEFT_OPTICS_PORT: equ PORT0
Y_LEFT_OPTICS_MASK: equ BIT2
Y_RIGHT_OPTICS_PORT: equ PORT0
Y_RIGHT_OPTICS_MASK: equ BIT3
Z_UP_OPTICS_PORT: equ PORT0
Z_UP_OPTICS_MASK: equ BIT4
Z_DOWN_OPTICS_PORT: equ PORT0
Z_DOWN_OPTICS_MASK: equ BIT5
LED_PORT: equ PORT0
LED_MASK: equ BIT6
;
; Normal operating mode - configure buttons as resistive/CMOS
; LED as medium sink/CMOS and optics (x,y,z) as HI-Z/CMOS
;
PORT0_NORMAL: equ 80h
PORT0_MODE1_NORMAL: equ 80h
PORT0_MODE0_NORMAL: equ 40h
PORT1_NORMAL: equ 03h
PORT1_MODE1_NORMAL: equ 03h
PORT1_MODE0_NORMAL: equ 00h
;
; Suspend operating mode (no wake up) - configure buttons as
; medium sink/CMOS, LED as resistive/CMOS and
; optics (x,y,z) as HI-Z/CMOS
;
PORT0_SUSPEND: equ 40h
PORT0_MODE1_SUSPEND: equ 40h
PORT0_MODE0_SUSPEND: equ 80h
PORT1_SUSPEND: equ 00h
PORT1_MODE1_SUSPEND: equ 00h
PORT1_MODE0_SUSPEND: equ 03h
;
; Suspend with remote wake-up - configure buttons as resistive/CMOS
; LED as resistive/CMOS and optics (x,y,z) as HI-Z/CMOS
;
PORT0_SUSRW: equ 0C0h
PORT0_MODE1_SUSRW: equ 0C0h
PORT0_MODE0_SUSRW: equ 00h
PORT1_SUSRW: equ 03h
PORT1_MODE1_SUSRW: equ 03h
PORT1_MODE0_SUSRW: equ 00h
BUTTON_DEBOUNCE: equ 15 ; 15ms debouce time
MOUSE_PACKET_4: equ 4 ; 4-byte mouse packet
MOUSE_PACKET_3: equ 3 ; 3-byte mouse packet
;
; Button State Machine
;
NO_BUTTON_DATA_PENDING: equ 00h
BUTTON_DATA_PENDING: equ 02h ; state defined any time
; we read a button
;
; Optics State Machine
;
NO_OPTIC_DATA_PENDING: equ 00h
OPTIC_DATA_PENDING: equ 02h ; state defined any time
; we read the optics
;
; Event State Machine
;
NO_EVENT_PENDING: equ 00h
EVENT_PENDING: equ 02h ; state defined any time
; we have mouse packet to
; be sent back to host
;
; Transaction Types
;
TRANS_NONE: equ 00h
TRANS_CONTROL_READ: equ 02h
TRANS_CONTROL_WRITE: equ 04h
TRANS_NO_DATA_CONTROL: equ 06h
;
; Optics & Button Variables
;
debounceCount: equ 20h ; debounce counters for buttons
currentButtonState: equ 21h ; current button status
lastButtonState: equ 22h ; last read value of buttons
opticStatus: equ 23h ; current optic status
xCount: equ 24h ; current optics x state
yCount: equ 25h ; current optics y state
zCount: equ 26h ; current wheel button state
buttonMachine: equ 27h ; buttons/optics state machine
eventMachine: equ 28h ; state machine for sending data back to host
vertMachine: equ 29h ; y-axis state machine
horzMachine: equ 2Ah ; x-axis state machine
zMachine: equ 2Bh ; z-axis (wheel) state machine
lastVertState: equ 2Ch ; last read y-axis optics
lastHorzState: equ 2Dh ; last read x-axis optics
lastZstate: equ 2Eh ; last read z-axis optics
; (wheel)
temp: equ 2Fh ; temporary register
buttonValue: equ 30h
buttonTemp: equ 31h
;
; Dual Interface Variables
;
dualInterfaceMouse: equ 32h ; mouse type
delayCounter: equ 33h ; delay counter
dualInterface1ms: equ 34h ; 1ms counter
;
; USB Variables
;
suspendCount: equ 35h ; usb suspend counter
ep1DataToggle: equ 36h ; endpoint 1 data toggle
ep0DataToggle: equ 37h ; endpoint 0 data toggle
dataStart: equ 38h ; ROM table address, start of data
dataCount: equ 39h ; data count to return to host
maximumDataCount: equ 3Ah ; maximum size of data to return to host
ep0InMachine: equ 3Bh ; endpoint 0 IN state machine
ep0InFlag: equ 3Ch ; endpoint 0 flag for no-data control
configuration: equ 3Dh ; configured/not configured state
remoteWakeup: equ 3Eh ; remote wakeup on/off
ep1Stall: equ 3Fh ; endpoint 1 stall on/off
idle: equ 40h ; HID idle timer
intTemp: equ 41h ; interrupt routine temp variable
idleTimer: equ 42h ; HID idle timer
idlePrescaler: equ 43h ; HID idle prescale (4ms)
ep0Transtype: equ 44h ; Endpoint 0 transaction type
pendingData: equ 45h ; data pending during no-data control
protocol: equ 46h ; mouse protocol boot/report
;
; PS2 Variables - written on top of USB variables
;
ps2Temp0: equ 35h
ps2LastValidCmd: equ 36h
ps2InvalidCmdCount: equ 37h
ps2ReportRate: equ 38h
ps2ReportInterval: equ 39h
ps2Scale: equ 3Ah
ps2StreamMode: equ 3Bh
ps2Resolution: equ 3Ch
ps2MouseEnabled: equ 3Dh
ps2Wheel: equ 3Eh
ps2WrapMode: equ 3Fh
ps2IntervalCount: equ 40h ; send back a mouse packet
; when this interval expires
sequence: equ 41h
saveCmd: equ 42h
ps2XmitBuffer: equ 43h
ps2XmitBuffer0: equ ps2XmitBuffer+0
ps2XmitBuffer1: equ ps2XmitBuffer+1
ps2XmitBuffer2: equ ps2XmitBuffer+2
ps2XmitBuffer3: equ ps2XmitBuffer+3
ps2XmitBufferLen: equ ps2XmitBuffer+4 ; total bytes to send
ps2XmitLen: equ ps2XmitBuffer+5 ; remaining bytes to send
;********************************************************************
;
; Interrupt Vector Table
;
;********************************************************************
ORG 00h
jmp dualMain ; power up
jmp dualUsbBusReset_ps2Error ; USB reset / error
jmp errorHandler ; 128us interrupt
jmp dual1msTimer ; 1.024ms interrupt
jmp dualUsbEndpoint0_ps2Error ; Endpoint 0 interrupt / error
jmp dualUsbEndpoint1_ps2Error ; Endpoint 1 interrupt / error
jmp errorHandler ; Endpoint 2 interrupt
jmp errorHandler ; Reserved
jmp errorHandler ; Capture timer A interrupt Vector
jmp errorHandler ; Capture timer B interrupt Vector
jmp errorHandler ; GPIO interrupt vector
jmp dualUsbWakeup_ps2Error ; Wake-up interrupt / error
;********************************************************************
; Error Handler
;
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