programmer/programmer/programmer.asm

   1 .def srbyte = r12  ;byty for search rom algorithm
   2 .def writelow = r13;  marker for send low
   3 .def zero =r14;  always zero
   4 .def smode=r15; if 1 then send
   5 .def temp = r16 ;
   6 .def temp2 = r17;
   7 .def mode = r18 ;
   8 .def bitp = r19 ; bit counter ... shift...
   9 .def rwbyte = r21;
  10 .def param = r22;
  11 .def bytep = r23  ;byte counter
  12 #define spmcrval  param
  13
  14
  15 .equ OWM_READ_ROM_COMMAND=0 ; 0 wegen schnellen test ist dieser wert 0! Daturch wird die Sprungdabelle nicht verwendet
  16 .equ OWM_SLEEP=1 ; Warten auf Reset
  17 .equ OWM_MATCH_ROM=2
  18 .equ OWM_SEARCH_ROM_S=3  ;send bit
  19 .equ OWM_SEARCH_ROM_R=4  ;resive master
  20 .equ OWM_READ_COMMAND=5
  21 .equ OWM_WRITE_SCRATCHPAD=6
  22 .equ OWM_READ_SCRATCHPAD=7
  23 .equ OWM_PROGRAMM_PAGE=8
  24 .equ OWM_RECALL_FLASH=9
  25
  26
  27 .equ OW_DDR = DDRB
  28 .equ OW_PIN = PORTB2
  29 .equ OW_PORT = PORTB
  30 .equ OW_PINN = PINB
  31
  32 ;.equ SRAM_START = 0x60
  33
  34 .macro set_clock
  35                 ldi temp,0x80;
  36                 out CLKPR,temp
  37                 ldi temp,@0
  38                 out CLKPR,temp
  39 .endmacro
  40
  41 .macro owwl
  42                 sbic OW_PINN,OW_PIN
  43                 rjmp pc-1
  44 .endmacro
  45
  46 .macro owwh
  47                 sbis OW_PINN,OW_PIN
  48                 rjmp pc-1
  49 .endmacro
  50
  51
  52
  53
  54  ;---------------------------------------------------
  55 ; START of PROG
  56 ;---------------------------------------------------
  57
  58
  59 .CSEG
  60 .ORG 0x000
  61 jreset:
  62                 rjmp start ; Reset-Vector
  63                 reti ;
  64                 reti ;
  65                 reti ;
  66                 reti ;
  67                 reti ;
  68                 reti ;
  69                 reti ;
  70                 reti ;
  71                 reti ;
  72                 reti ;
  73                 reti ;
  74                 reti ;
  75                 reti ;
  76                 reti ;
  77                 reti ;
  78                 reti ;
  79                 reti ;
  80                 reti ;
  81                 reti ;
  82                 reti ;
  83
  84
  85 .ORG 0x0EC0
  86
  87 start:
  88                 cli
  89                 ldi temp,0
  90                 mov zero,temp
  91                 set_clock 0x00 ;8mhz
  92                 ldi mode,OWM_SLEEP
  93                 ldi temp,(1<<CS01) //1us
  94                 out TCCR0B,temp
  95                 ldi temp, HIGH(RAMEND) ; HIGH-Byte der obersten RAM-Adresse
  96                 out SPH, temp
  97                 ldi temp, LOW(RAMEND) ; LOW-Byte der obersten RAM-Adresse
  98                 out SPL, temp
  99                 ;ldi temp,1
 100                 ;out DDRB,temp
 101                 clr writelow
 102                 clr bitp
 103
 104                 ;sbi PORTB,0
 105                 ldi ZL,low(pro_owid*2)
 106                 ldi ZH,high(pro_owid*2)
 107                 ldi XL,low(sowid)
 108                 ldi XH,high(sowid)
 109                 ;ldi temp2,8
 110 pro_copy_loop: ;copy ID on SRAM for better handling
 111                 lpm temp,Z+
 112                 st X+,temp
 113                 cpi XL,SRAM_START+8
 114                 brlo pro_copy_loop
 115 pro_loop:
 116                 ;sbi PORTB,0
 117                 owwl                            ;wait for line goes low (polling)
 118                 sbrs writelow,0         ;test of zero send
 119                 rjmp pro_loop1          ;no ? goes next
 120                 sbi OW_DDR,OW_PIN       ;yes pull line to low
 121                 ldi param,50            ;wait for 50 us
 122                 rcall wait_time
 123                 clr writelow            ;reset write low indecator
 124                 cbi OW_DDR,OW_PIN   ;release line
 125                 owwh                            ;wait for line is high (it can takes some time cause of the capacity of line)
 126 pro_loop1:
 127                 tst smode                       ;smode=1 for slave sends to master
 128                 breq pro_loop_resv
 129 pro_loop_send:
 130                 tst bitp
 131                 brne pro_loop_send1
 132                 rcall pro_hb
 133                 tst smode
 134                 breq pro_loop_end ; now reading ... do nothing
 135 pro_loop_send1:  ;prebare next bit
 136                 sbrs rwbyte ,0; if bit 0 set in rwbyte then skip next command
 137                 inc writelow
 138                 lsl bitp
 139                 ror rwbyte
 140                 rjmp pro_loop_end
 141
 142 pro_loop_resv:
 143                 ldi param,15  ;wait 15us
 144                 rcall wait_time
 145                 lsr rwbyte
 146                 ;cbi PORTB,0
 147                 sbic OW_PINN,OW_PIN  ;test line
 148                 ori rwbyte,0x80
 149                 lsl bitp
 150                 brne pro_loop_end ;no handle need
 151                 rcall pro_hb
 152                 tst smode
 153                 brne pro_loop_send ; Nach dem Gelesen byte koennte gesendet werden muessen....
 154 pro_loop_end:
 155                 //owwh
 156                 out TCNT0,zero
 157 pro_loop_end_test_reset:
 158                 sbic OW_PINN,OW_PIN  //leitung wieder high
 159                 rjmp pro_loop
 160                 in temp,TCNT0
 161                 cpi temp,130
 162                 brlo pro_loop_end_test_reset
 163                 rcall pro_sleep_s2
 164                 rjmp pro_loop
 165
 166
 167
 168
 169 pro_sleep:
 170                 out TCNT0,zero
 171 pro_sleep_s1:
 172                 sbic OW_PINN,OW_PIN  //leitung wieder high
 173                 ret
 174                 in temp,TCNT0
 175                 cpi temp,200
 176                 brlo pro_sleep_s1
 177                 //leitung wieder high
 178 pro_sleep_s2:
 179                 owwh
 180                 ldi param,40
 181                 rcall wait_time
 182                 //Presents Impuls
 183                 sbi OW_DDR,OW_PIN
 184                 ldi param,130
 185                 rcall wait_time
 186                 cbi OW_DDR,OW_PIN
 187                 //init read byte
 188                 ldi bitp,0x01
 189                 ldi rwbyte,0
 190                 clr smode
 191                 ldi mode,OWM_READ_ROM_COMMAND
 192                 //Wait for all other devices presents impuls finished
 193                 ldi param,40
 194                 rcall wait_time
 195                 ret
 196
 197
 198
 199 pro_hb:
 200                 ldi ZL,low(pro_stable)
 201                 ldi ZH,high(pro_stable)
 202                 add ZL,mode
 203                 adc ZH,zero
 204                 icall
 205                 ret
 206
 207 pro_stable:
 208                 rjmp pro_read_rom_command
 209                 rjmp pro_sleep
 210                 rjmp pro_match_rom
 211                 rjmp pro_search_rom_s
 212                 rjmp pro_search_rom_r
 213                 rjmp pro_read_command
 214                 rjmp pro_write_scratchpad
 215                 rjmp pro_read_scratchpad
 216                 rjmp pro_programm_page
 217                 rjmp pro_recall_flash
 218
 219 pro_read_rom_command:
 220                 ldi mode,OWM_SLEEP
 221                 cpi rwbyte,0xCC
 222                 brne pro_rcc_1
 223                 ldi mode,OWM_READ_COMMAND
 224                 rjmp pro_out_bitp1
 225 pro_rcc_1:
 226                 cpi rwbyte,0xF0 ;Searchrom
 227                 brne pro_rcc_2
 228                 ldi XL,low(sowid)  ;init sram pointer
 229                 ldi XH,high(sowid)
 230                 ld srbyte,X+
 231                 ldi bytep,0
 232                 rjmp pro_serchrom_next_bit
 233 pro_rcc_2:
 234                 cpi rwbyte,0x55 ;Matchrom
 235                 brne pro_rcc_3
 236 //              rcall pro_owidinit
 237                 ldi XL,low(sowid)  ;init sram pointer
 238                 ldi XH,high(sowid)
 239                 ldi mode,OWM_MATCH_ROM
 240                 rjmp pro_out_bytep0
 241
 242 pro_rcc_3:
 243                 ret
 244
 245 pro_match_rom:
 246                 ld temp,X+
 247                 cp temp,rwbyte
 248                 breq pro_match_rom_next
 249                 ldi mode,OWM_SLEEP
 250                 ret
 251 pro_match_rom_next:
 252                 cpi XL,SRAM_START+8
 253                 breq pro_match_rom_found
 254                 rjmp pro_out_bitp1
 255 pro_match_rom_found:
 256             ldi mode,OWM_READ_COMMAND
 257                 rjmp pro_out_bitp1
 258
 259 pro_read_command:
 260                 ldi mode,OWM_SLEEP
 261                 cpi rwbyte,0x0F ;; Write to Scratchpad
 262                 brne pro_rc_1
 263                 ldi mode,OWM_WRITE_SCRATCHPAD
 264                 ldi XL,low(scratchpad)  ;init sram pointer
 265                 ldi XH,high(scratchpad)
 266                 rjmp pro_out_bytep0
 267 pro_rc_1:
 268                 cpi rwbyte,0xAA
 269                 brne pro_rc_2
 270                 ldi mode,OWM_READ_SCRATCHPAD  ;;Read from Scratchpad
 271                 ldi XL,low(scratchpad)  ;init sram pointer
 272                 ldi XH,high(scratchpad)
 273                 inc smode
 274                 ld rwbyte,X+
 275                 rjmp pro_out_bytep0
 276
 277 pro_rc_2:
 278                 cpi rwbyte,0xB8
 279                 brne pro_rc_3
 280                 ldi mode,OWM_RECALL_FLASH  ;; copy Flash page in Scratchpad
 281                 ldi XL,low(scratchpad)  ;init sram pointer
 282                 ldi XH,high(scratchpad)
 283                 rjmp pro_out_bytep0
 284 pro_rc_3:
 285                 cpi rwbyte,0x55 ; copy Scratchpad to Flash
 286                 brne pro_rc_4
 287                 ldi mode,OWM_SLEEP
 288                 rjmp pro_programm_page
 289
 290 pro_rc_4:
 291                 cpi rwbyte,0x89 ; Reset Device /Boot (new) Firmware
 292                 brne pro_rc_5
 293                 rjmp jreset
 294 pro_rc_5:
 295                 cpi rwbyte,0x8B ; Clear the OWID saved in EEPROM / one ID1
 296                 brne pro_rc_6
 297                 ldi temp,7
 298 pro_rc_5a:
 299                 ldi XL,low(E2END)
 300                 ldi XH,high(E2END)
 301                 sub XL,temp
 302                 out EEARH,XH
 303                 out EEARL,XL
 304                 ldi temp, (0<<EEPM1)|(0<<EEPM0)
 305                 out EECR, temp
 306                 ldi temp,0xFF
 307                 out EEDR, temp
 308                 sbi EECR, EEMPE
 309                 sbi EECR, EEPE
 310                 ret
 311
 312
 313 pro_rc_6:
 314                 cpi rwbyte,0x8C ; Clear the OWID saved in EEPROM / one ID2
 315                 brne pro_rc_7
 316                 ldi temp,7+8
 317                 rjmp pro_rc_5a
 318
 319 pro_rc_7:
 320                 ret
 321
 322 pro_write_scratchpad:
 323                 st X+,rwbyte
 324                 cpi XL,SRAM_START+8+66
 325                 brlo pro_write_scratchpad_next
 326                 ldi mode,OWM_SLEEP
 327                 ret
 328 pro_write_scratchpad_next:
 329                 ldi bitp,1
 330                 ret
 331
 332 pro_read_scratchpad:
 333                 cpi XL,SRAM_START+8+66
 334                 brlo pro_read_scratchpad_next
 335                 ldi mode,OWM_SLEEP
 336                 clr smode
 337                 ret
 338 pro_read_scratchpad_next:
 339                 ld rwbyte,X+
 340                 rjmp pro_out_bitp1
 341
 342
 343 pro_programm_page:
 344 .equ PAGESIZEB = PAGESIZE*2;PAGESIZEB is page size in BYTES, not words
 345 // .org SMALLBOOTSTART
 346 write_page:
 347                 ;transfer data from RAM to Flash page buffer
 348                 ldi bytep, PAGESIZEB ;init loop variable
 349                 ldi YL,low(scratchpad)  ;init sram pointer
 350                 ldi YH,high(scratchpad)
 351                 ld ZL,Y+
 352                 ld ZH,Y+
 353                 ;page erase
 354                 ldi spmcrval, (1<<PGERS) + (1<<SPMEN)
 355                 rcall do_spm
 356 wrloop:
 357                 ld r0, Y+
 358                 ld r1, Y+
 359                 ldi spmcrval, (1<<SPMEN)
 360                 rcall do_spm
 361                 adiw ZH:ZL, 2
 362                 subi bytep, 2;use subi for PAGESIZEB<=256
 363                 brne wrloop
 364                 ;execute page write
 365                 subi ZL, low(PAGESIZEB) ;restore pointer
 366                 sbci ZH, high(PAGESIZEB) ;not required for PAGESIZEB<=256
 367                 ldi spmcrval, (1<<PGWRT) + (1<<SPMEN)
 368                 rcall do_spm
 369                 ;read back and check, optional
 370                 ldi bytep, PAGESIZEB
 371                 subi YL, low(PAGESIZEB) ;restore pointer
 372                 sbci YH, high(PAGESIZEB)
 373 rdloop:
 374                 lpm r0, Z+
 375                 ld r1, Y+
 376                 cpse r0, r1
 377                 rjmp error
 378                 subi bytep, 2;use subi for PAGESIZEB<=256
 379                 brne rdloop
 380                 ;return
 381                 ret
 382 do_spm:
 383                  ;input: spmcrval determines SPM action
 384                 ;disable interrupts if enabled, store status
 385                 in temp2, SREG
 386                 cli
 387                 ;check for previous SPM complete
 388 wait:
 389                 in temp, SPMCSR
 390                 sbrc temp, SPMEN
 391                 rjmp wait
 392                 ;SPM timed sequence
 393                 out SPMCSR, spmcrval
 394                 spm
 395                 ;restore SREG (to enable interrupts if originally enabled)
 396                 out SREG, temp2
 397                 ret
 398
 399 error:
 400
 401
 402                 ret
 403
 404 pro_recall_flash:
 405                 st X+,rwbyte
 406                 ;inc bytep
 407                 cpi XL,SRAM_START+8+2
 408                 brlo pro_out_bitp1;pro_recall_flash_next
 409                 lds ZL,scratchpad
 410                 lds ZH,scratchpad+1
 411 pro_recall_flash_cl:
 412                 lpm temp,Z+
 413                 st X+,temp
 414                 cpi XL,SRAM_START+8+66
 415                 brne pro_recall_flash_cl
 416                 ldi mode,OWM_SLEEP
 417                 ret
 418
 419 pro_out_read_command:
 420                 ldi mode,OWM_READ_COMMAND
 421 pro_out_bytep0:
 422                 ldi bytep,0
 423 pro_out_bitp1:
 424                 ldi bitp,1
 425                 ret
 426
 427
 428
 429 pro_serchrom_next_bit:
 430                 mov rwbyte,srbyte
 431                 mov temp2,rwbyte
 432                 com rwbyte
 433                 ror temp2  ;first bit in C
 434                 rol rwbyte ;C in first bit
 435                 inc smode
 436                 ldi bitp,0x40
 437                 ldi mode,OWM_SEARCH_ROM_R  ;next mod Resive
 438                 ret
 439
 440
 441 pro_search_rom_s:
 442                 clr temp2
 443                 lsr srbyte ;shift in C lowest bit
 444                 ror temp2  ; shift in temp2 as highest bit
 445                 andi rwbyte,0x80  ;  clear other bits
 446                 eor temp2,rwbyte
 447                 breq pro_search_rom_s_goon
 448                 ldi mode,OWM_SLEEP
 449                 ret
 450 pro_search_rom_s_goon:
 451                 inc bytep
 452                 mov temp2,bytep
 453                 andi temp2,0x07
 454                 brne pro_serchrom_next_bit ;prepare next bit
 455                 mov temp2,bytep
 456                 andi temp2,0x40 ;;end
 457                 brne pro_search_rom_found
 458                 ;read next byte
 459                 ld srbyte,X+
 460                 rjmp pro_serchrom_next_bit
 461
 462 pro_search_rom_found:
 463                 ldi mode,OWM_READ_COMMAND
 464                 rjmp pro_out_bytep0
 465
 466 pro_search_rom_r:
 467                 clr smode
 468                 ldi mode,OWM_SEARCH_ROM_S
 469                 ldi bitp,0  ;go to searchrom_s after bit get
 470                 ret
 471
 472 pro_owid: .DB  0xA3, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 0x55, 0xFA
 473
 474
 475
 476
 477
 478 wait_time:
 479                 out TCNT0,zero
 480 wait_time1:
 481                 in temp,TCNT0
 482                 cp temp,param
 483                 brlo wait_time1
 484                 ret
 485
 486
 487 .DSEG
 488 sowid: .BYTE 8
 489 scratchpad: .BYTE 66