參數資料
型號: ADNS-2051
英文描述: Optical Mouse Sensor
中文描述: 光學鼠標傳感器
文件頁數: 26/40頁
文件大?。?/td> 454K
代理商: ADNS-2051
26
or [spi_addr], A
call writeaddr
jmp wrdata
; set MSB of address (write)
writeaddr:
mov A, 08h
mov [bit_counter], A
mov A, ~SCLK
and [port1_wrote], A
mov A, [port1_wrote]
iowr Port1_Data
mov A, [spi_addr]
asl
mov [spi_addr], A
jnc addr0
; 8 bits to shift out
nexta:
; lower SCLK
; shift next bit
addr1:
mov A, SDIO
or [port1_wrote], A
jmp addrx
mov A, ~SDIO
and [port1_wrote], A
mov A, [port1_wrote]
iowr Port1_Data
nop
nop
nop
nop
nop
nop
nop
mov A, SCLK
or [port1_wrote], A
mov A, [port1_wrote]
iowr Port1_Data
nop
nop
nop
nop
nop
nop
nop
dec [bit_counter]
jnz nexta
ret
; raise SDIO
addr0:
; lower SDIO
addrx:
; wait for cable to settle
; raise SCLK
; ADNS-2051 reads the address bit
; wait for cable to settle
wrdata:
mov A, 08h
mov [bit_counter], A
mov A, ~SCLK
and [port1_wrote], A
mov A, [port1_wrote]
iowr Port1_Data
mov A, [spi_data]
asl
mov [spi_data], A
jnc wr0
mov A, SDIO
or [port1_wrote], A
jmp wrx
mov A, ~SDIO
and [port1_wrote], A
mov A, [port1_wrote]
iowr Port1_Data
nop
nop
nop
nop
nop
nop
nop
mov A, SCLK
; 8 bits of data
nextw:
; lower SCLK
; shift next bit
wr1:
; raise SDIO
wr0:
; lower SDIO
wrx:
; wait for cable to settle
; raise SCLK
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