--- /dev/null
+.def srbyte = r12 ;byty for search rom algorithm
+.def writelow = r13; marker for send low
+.def zero =r14; always zero
+.def smode=r15; if 1 then send
+.def temp = r16 ;
+.def temp2 = r17;
+.def mode = r18 ;
+.def bitp = r19 ; bit counter ... shift...
+.def rwbyte = r21;
+.def param = r22;
+.def bytep = r23 ;byte counter
+#define spmcrval param
+
+
+.equ OWM_READ_ROM_COMMAND=0 ; 0 wegen schnellen test ist dieser wert 0! Daturch wird die Sprungdabelle nicht verwendet
+.equ OWM_SLEEP=1 ; Warten auf Reset
+.equ OWM_MATCH_ROM=2
+.equ OWM_SEARCH_ROM_S=3 ;send bit
+.equ OWM_SEARCH_ROM_R=4 ;resive master
+.equ OWM_READ_COMMAND=5
+.equ OWM_WRITE_SCRATCHPAD=6
+.equ OWM_READ_SCRATCHPAD=7
+.equ OWM_PROGRAMM_PAGE=8
+.equ OWM_RECALL_FLASH=9
+
+
+.equ OW_DDR = DDRB
+.equ OW_PIN = PORTB2
+.equ OW_PORT = PORTB
+.equ OW_PINN = PINB
+
+;.equ SRAM_START = 0x60
+
+.macro set_clock
+ ldi temp,0x80;
+ out CLKPR,temp
+ ldi temp,@0
+ out CLKPR,temp
+.endmacro
+
+.macro owwl
+ sbic OW_PINN,OW_PIN
+ rjmp pc-1
+.endmacro
+
+.macro owwh
+ sbis OW_PINN,OW_PIN
+ rjmp pc-1
+.endmacro
+
+
+
+
+ ;---------------------------------------------------
+; START of PROG
+;---------------------------------------------------
+
+
+.CSEG
+.ORG 0x000
+jreset:
+ rjmp start ; Reset-Vector
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+ reti ;
+
+
+.ORG 0x0EC0
+
+start:
+ cli
+ ldi temp,0
+ mov zero,temp
+ set_clock 0x01 ;4mhz
+ ldi mode,OWM_SLEEP
+ ldi temp,(1<<CS01) //2us
+ out TCCR0B,temp
+ ldi temp, HIGH(RAMEND) ; HIGH-Byte der obersten RAM-Adresse
+ out SPH, temp
+ ldi temp, LOW(RAMEND) ; LOW-Byte der obersten RAM-Adresse
+ out SPL, temp
+ ;ldi temp,1
+ ;out DDRB,temp
+ clr writelow
+ clr bitp
+
+ ;sbi PORTB,0
+ ldi ZL,low(pro_owid*2)
+ ldi ZH,high(pro_owid*2)
+ ldi XL,low(sowid)
+ ldi XH,high(sowid)
+ ;ldi temp2,8
+pro_copy_loop: ;copy ID on SRAM for better handling
+ lpm temp,Z+
+ st X+,temp
+ cpi XL,SRAM_START+8
+ brlo pro_copy_loop
+pro_loop:
+ ;sbi PORTB,0
+ owwl ;wait for line goes low (polling)
+ sbrc writelow,0 ;test of zero send
+ sbi OW_DDR,OW_PIN ;yes pull line to low 2us faster
+ sbrs writelow,0 ;test egain 2us faster.....
+ rjmp pro_loop1 ;no ? goes next
+ ldi param,20 ;wait for 50 us
+ rcall wait_time
+ clr writelow ;reset write low indecator
+ cbi OW_DDR,OW_PIN ;release line
+ owwh ;wait for line is high (it can takes some time cause of the capacity of line)
+pro_loop1:
+ tst smode ;smode=1 for slave sends to master
+ breq pro_loop_resv
+pro_loop_send:
+ tst bitp
+ brne pro_loop_send1
+ rcall pro_hb
+ tst smode
+ breq pro_loop_end ; now reading ... do nothing
+pro_loop_send1: ;prebare next bit
+ sbrs rwbyte ,0; if bit 0 set in rwbyte then skip next command
+ inc writelow
+ lsl bitp
+ ror rwbyte
+ rjmp pro_loop_end
+
+pro_loop_resv:
+ ldi param,7 ;wait 15us
+ rcall wait_time
+ lsr rwbyte
+ ;cbi PORTB,0
+ sbic OW_PINN,OW_PIN ;test line
+ ori rwbyte,0x80
+ lsl bitp
+ brne pro_loop_end ;no handle need
+ rcall pro_hb
+ tst smode
+ brne pro_loop_send ; Nach dem Gelesen byte koennte gesendet werden muessen....
+pro_loop_end:
+ //owwh
+ out TCNT0,zero
+pro_loop_end_test_reset:
+ sbic OW_PINN,OW_PIN //leitung wieder high
+ rjmp pro_loop
+ in temp,TCNT0
+ cpi temp,63
+ brlo pro_loop_end_test_reset
+ rcall pro_sleep_s2
+ rjmp pro_loop
+
+
+
+
+pro_sleep:
+ out TCNT0,zero
+pro_sleep_s1:
+ sbic OW_PINN,OW_PIN //leitung wieder high
+ ret
+ in temp,TCNT0
+ cpi temp,100
+ brlo pro_sleep_s1
+ //leitung wieder high
+pro_sleep_s2:
+ owwh
+ ldi param,20
+ rcall wait_time
+ //Presents Impuls
+ sbi OW_DDR,OW_PIN
+ ldi param,75
+ rcall wait_time
+ cbi OW_DDR,OW_PIN
+ //init read byte
+ ldi bitp,0x01
+ ldi rwbyte,0
+ clr smode
+ ldi mode,OWM_READ_ROM_COMMAND
+ //Wait for all other devices presents impuls finished
+ ldi param,20
+ rcall wait_time
+ ret
+
+
+
+pro_hb:
+ ldi ZL,low(pro_stable)
+ ldi ZH,high(pro_stable)
+ add ZL,mode
+ adc ZH,zero
+ icall
+ ret
+
+pro_stable:
+ rjmp pro_read_rom_command
+ rjmp pro_sleep
+ rjmp pro_match_rom
+ rjmp pro_search_rom_s
+ rjmp pro_search_rom_r
+ rjmp pro_read_command
+ rjmp pro_write_scratchpad
+ rjmp pro_read_scratchpad
+ rjmp pro_programm_page
+ rjmp pro_recall_flash
+
+pro_read_rom_command:
+ ldi mode,OWM_SLEEP
+ cpi rwbyte,0xCC
+ brne pro_rcc_1
+ ldi mode,OWM_READ_COMMAND
+ rjmp pro_out_bitp1
+pro_rcc_1:
+ cpi rwbyte,0xF0 ;Searchrom
+ brne pro_rcc_2
+ ldi XL,low(sowid) ;init sram pointer
+ ldi XH,high(sowid)
+ ld srbyte,X+
+ ldi bytep,0
+ rjmp pro_serchrom_next_bit
+pro_rcc_2:
+ cpi rwbyte,0x55 ;Matchrom
+ brne pro_rcc_3
+// rcall pro_owidinit
+ ldi XL,low(sowid) ;init sram pointer
+ ldi XH,high(sowid)
+ ldi mode,OWM_MATCH_ROM
+ rjmp pro_out_bytep0
+
+pro_rcc_3:
+ ret
+
+pro_match_rom:
+ ld temp,X+
+ cp temp,rwbyte
+ breq pro_match_rom_next
+ ldi mode,OWM_SLEEP
+ ret
+pro_match_rom_next:
+ cpi XL,SRAM_START+8
+ breq pro_match_rom_found
+ rjmp pro_out_bitp1
+pro_match_rom_found:
+ ldi mode,OWM_READ_COMMAND
+ rjmp pro_out_bitp1
+
+pro_read_command:
+ ldi mode,OWM_SLEEP
+ cpi rwbyte,0x0F ;; Write to Scratchpad
+ brne pro_rc_1
+ ldi mode,OWM_WRITE_SCRATCHPAD
+ ldi XL,low(scratchpad) ;init sram pointer
+ ldi XH,high(scratchpad)
+ rjmp pro_out_bytep0
+pro_rc_1:
+ cpi rwbyte,0xAA
+ brne pro_rc_2
+ ldi mode,OWM_READ_SCRATCHPAD ;;Read from Scratchpad
+ ldi XL,low(scratchpad) ;init sram pointer
+ ldi XH,high(scratchpad)
+ inc smode
+ ld rwbyte,X+
+ rjmp pro_out_bytep0
+
+pro_rc_2:
+ cpi rwbyte,0xB8
+ brne pro_rc_3
+ ldi mode,OWM_RECALL_FLASH ;; copy Flash page in Scratchpad
+ ldi XL,low(scratchpad) ;init sram pointer
+ ldi XH,high(scratchpad)
+ rjmp pro_out_bytep0
+pro_rc_3:
+ cpi rwbyte,0x55 ; copy Scratchpad to Flash
+ brne pro_rc_4
+ ldi mode,OWM_SLEEP
+ rjmp pro_programm_page
+
+pro_rc_4:
+ cpi rwbyte,0x89 ; Reset Device /Boot (new) Firmware
+ brne pro_rc_5
+ rjmp jreset
+pro_rc_5:
+ cpi rwbyte,0x8B ; Clear the OWID saved in EEPROM / one ID1
+ brne pro_rc_6
+ ldi temp,7
+pro_rc_5a:
+ ldi XL,low(E2END)
+ ldi XH,high(E2END)
+ sub XL,temp
+ out EEARH,XH
+ out EEARL,XL
+ ldi temp, (0<<EEPM1)|(0<<EEPM0)
+ out EECR, temp
+ ldi temp,0xFF
+ out EEDR, temp
+ sbi EECR, EEMPE
+ sbi EECR, EEPE
+ ret
+
+
+pro_rc_6:
+ cpi rwbyte,0x8C ; Clear the OWID saved in EEPROM / one ID2
+ brne pro_rc_7
+ ldi temp,7+8
+ rjmp pro_rc_5a
+
+pro_rc_7:
+ ret
+
+pro_write_scratchpad:
+ st X+,rwbyte
+ cpi XL,SRAM_START+8+66
+ brlo pro_write_scratchpad_next
+ ldi mode,OWM_SLEEP
+ ret
+pro_write_scratchpad_next:
+ ldi bitp,1
+ ret
+
+pro_read_scratchpad:
+ cpi XL,SRAM_START+8+66
+ brlo pro_read_scratchpad_next
+ ldi mode,OWM_SLEEP
+ clr smode
+ ret
+pro_read_scratchpad_next:
+ ld rwbyte,X+
+ rjmp pro_out_bitp1
+
+
+pro_programm_page:
+.equ PAGESIZEB = PAGESIZE*2;PAGESIZEB is page size in BYTES, not words
+// .org SMALLBOOTSTART
+write_page:
+ ;transfer data from RAM to Flash page buffer
+ ldi bytep, PAGESIZEB ;init loop variable
+ ldi YL,low(scratchpad) ;init sram pointer
+ ldi YH,high(scratchpad)
+ ld ZL,Y+
+ ld ZH,Y+
+ ;page erase
+ ldi spmcrval, (1<<PGERS) + (1<<SPMEN)
+ rcall do_spm
+wrloop:
+ ld r0, Y+
+ ld r1, Y+
+ ldi spmcrval, (1<<SPMEN)
+ rcall do_spm
+ adiw ZH:ZL, 2
+ subi bytep, 2;use subi for PAGESIZEB<=256
+ brne wrloop
+ ;execute page write
+ subi ZL, low(PAGESIZEB) ;restore pointer
+ sbci ZH, high(PAGESIZEB) ;not required for PAGESIZEB<=256
+ ldi spmcrval, (1<<PGWRT) + (1<<SPMEN)
+ rcall do_spm
+ ;read back and check, optional
+ ldi bytep, PAGESIZEB
+ subi YL, low(PAGESIZEB) ;restore pointer
+ sbci YH, high(PAGESIZEB)
+rdloop:
+ lpm r0, Z+
+ ld r1, Y+
+ cpse r0, r1
+ rjmp error
+ subi bytep, 2;use subi for PAGESIZEB<=256
+ brne rdloop
+ ;return
+ ret
+do_spm:
+ ;input: spmcrval determines SPM action
+ ;disable interrupts if enabled, store status
+ in temp2, SREG
+ cli
+ ;check for previous SPM complete
+wait:
+ in temp, SPMCSR
+ sbrc temp, SPMEN
+ rjmp wait
+ ;SPM timed sequence
+ out SPMCSR, spmcrval
+ spm
+ ;restore SREG (to enable interrupts if originally enabled)
+ out SREG, temp2
+ ret
+
+error:
+
+
+ ret
+
+pro_recall_flash:
+ st X+,rwbyte
+ ;inc bytep
+ cpi XL,SRAM_START+8+2
+ brlo pro_out_bitp1;pro_recall_flash_next
+ lds ZL,scratchpad
+ lds ZH,scratchpad+1
+pro_recall_flash_cl:
+ lpm temp,Z+
+ st X+,temp
+ cpi XL,SRAM_START+8+66
+ brne pro_recall_flash_cl
+ ldi mode,OWM_SLEEP
+ ret
+
+pro_out_read_command:
+ ldi mode,OWM_READ_COMMAND
+pro_out_bytep0:
+ ldi bytep,0
+pro_out_bitp1:
+ ldi bitp,1
+ ret
+
+
+
+pro_serchrom_next_bit:
+ mov rwbyte,srbyte
+ mov temp2,rwbyte
+ com rwbyte
+ ror temp2 ;first bit in C
+ rol rwbyte ;C in first bit
+ inc smode
+ ldi bitp,0x40
+ ldi mode,OWM_SEARCH_ROM_R ;next mod Resive
+ ret
+
+
+pro_search_rom_s:
+ clr temp2
+ lsr srbyte ;shift in C lowest bit
+ ror temp2 ; shift in temp2 as highest bit
+ andi rwbyte,0x80 ; clear other bits
+ eor temp2,rwbyte
+ breq pro_search_rom_s_goon
+ ldi mode,OWM_SLEEP
+ ret
+pro_search_rom_s_goon:
+ inc bytep
+ mov temp2,bytep
+ andi temp2,0x07
+ brne pro_serchrom_next_bit ;prepare next bit
+ mov temp2,bytep
+ andi temp2,0x40 ;;end
+ brne pro_search_rom_found
+ ;read next byte
+ ld srbyte,X+
+ rjmp pro_serchrom_next_bit
+
+pro_search_rom_found:
+ ldi mode,OWM_READ_COMMAND
+ rjmp pro_out_bytep0
+
+pro_search_rom_r:
+ clr smode
+ ldi mode,OWM_SEARCH_ROM_S
+ ldi bitp,0 ;go to searchrom_s after bit get
+ ret
+
+pro_owid: .DB 0xA3, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 0x55, 0xFA
+
+
+
+
+
+wait_time:
+ out TCNT0,zero
+wait_time1:
+ in temp,TCNT0
+ cp temp,param
+ brlo wait_time1
+ ret
+
+
+.DSEG
+sowid: .BYTE 8
+scratchpad: .BYTE 66
\ No newline at end of file
tm3d / owSlave2.git / blobdiff