; Orange programmer module v2.3
; (c) 1999-2004 CnCLab
;CHIP=uPD6253,256,uPD6254.hpl
;CHIP=uPD6254,512,uPD6254.hpl
 
; tested uPD6254

SOCKET=1 ;"I2C"

PING=SCL,0
PING=SDA,1
PINO=WP, 2
PINO=A0, 3
PINO=A1, 4
PINO=A2, 5


CDELAY=4                              ; one cycle time

[_START]
SDA=1,SCL=1,SDA=0,SCL=0               ; Start  10

[_STOP]
SCL=0,SDA=0,SCL=1,SDA=1                     ; Stop   01

[_PWAIT]        ; polling wait
R0=0
R1=0xA0
LOOP=(0,60){
_START
LOOP=(7,0) {SDA=R1[I],SCL=1,SCL=0} ; out 8 bits
SDA=1,SCL=1,R0[0]=SDA              ; ack store
SCL=0,SDA=0
_STOP
R0?0{BREAK} 
P=500
}



[INIT]
A0=0,A1=0,A2=0
WP=1

[READ]
_START
R0=0xA
LOOP=(3,0) {SDA=R0[I],SCL=1,SCL=0}   ; out 4 bits DeviceAdr
LOOP=(10,8){SDA=ADR[I],SCL=1,SCL=0}   ; out 3 bits Hi(Adr)
SDA=0,SCL=1,SCL=0                     ; out 1 bit, 0=Write Mode
SDA=1,SCL=1,SDA?0,SCL=0               ; ACKN check
                                      ; end  out  DeviceAdr, Hi(Adr), Mode

LOOP=(7,0) {SDA=ADR[I],SCL=1,SCL=0}   ; out 8 bits Lo(Adr)
SDA=1,SCL=1,SDA?0,SCL=0               ; ACKN check
                                      ; end  out   Lo(Adr)

_START
R0=0xA
LOOP=(3,0) {SDA=R0[I],SCL=1,SCL=0}    ; out 4 bits DeviceAdr
LOOP=(10,8) {SDA=ADR[I],SCL=1,SCL=0}  ; out 3 bits Hi(Adr)
SDA=1,SCL=1,SCL=0                     ; out 1 bit, 1=Read Mode
SDA=1,SCL=1,SDA?0,SCL=0               ; ACKN  check
                                      ; end  out  DeviceSelect

LOOP=(7,0) {SCL=1,DATA[I]=SDA,SCL=0}  ; read byte Data
SDA=1,SCL=1,SCL=0                     ; out  master  NO_ACKN

_STOP


[WRITE]
_START
R0=0xA
LOOP=(3,0) {SDA=R0[I],SCL=1,SCL=0}    ; out 4 bits DeviceAdr
LOOP=(10,8) {SDA=ADR[I],SCL=1,SCL=0}  ; out 3 bits Hi(Adr)
SDA=0,SCL=1,SCL=0                     ; out 1 bit, 0=Write Mode
SDA=1,SCL=1,SDA?0,SCL=0               ; ACKN check
                                      ; end  out DeviceAdr, Hi(Adr), Mode

LOOP=(7,0) {SDA=ADR[I],SCL=1,SCL=0}   ; out 8 bits Lo(Adr)
SDA=1,SCL=1,SDA?0,SCL=0               ; ACKN check
                                      ; end  out   Lo(Adr)

LOOP=(7,0) {SDA=DATA[I],SCL=1,SCL=0}  ; out byte Data
SDA=1,SCL=1,SDA?0,SCL=0               ; ACKN  check
                                      ; end out Data

_STOP

P=50000                               ; delay: (Write Time)
_PWAIT