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 0x0EE0
  86
  87
  88 start:
  89                 cli
  90                 ldi temp,0
  91                 mov zero,temp
  92                 set_clock 0x00 ;8mhz
  93                 ldi mode,OWM_SLEEP
  94                 ldi temp,(1<<CS01) //1us
  95                 out TCCR0B,temp
  96                 ldi temp, HIGH(RAMEND) ; HIGH-Byte der obersten RAM-Adresse
  97                 out SPH, temp
  98                 ldi temp, LOW(RAMEND) ; LOW-Byte der obersten RAM-Adresse
  99                 out SPL, temp
 100                 ;ldi temp,1
 101                 ;out DDRB,temp
 102                 clr writelow
 103                 clr bitp
 104
 105                 ;sbi PORTB,0
 106                 ldi ZL,low(pro_owid*2)
 107                 ldi ZH,high(pro_owid*2)
 108                 ldi XL,low(sowid)
 109                 ldi XH,high(sowid)
 110                 ;ldi temp2,8
 111 pro_copy_loop: ;copy ID on SRAM for better handling
 112                 lpm temp,Z+
 113                 st X+,temp
 114                 cpi XL,SRAM_START+8
 115                 brlo pro_copy_loop
 116 pro_loop:
 117                 ;sbi PORTB,0
 118                 owwl                            ;wait for line goes low (polling)
 119                 sbrs writelow,0         ;test of zero send
 120                 rjmp pro_loop1          ;no ? goes next
 121                 sbi OW_DDR,OW_PIN       ;yes pull line to low
 122                 ldi param,50            ;wait for 50 us
 123                 rcall wait_time
 124                 clr writelow            ;reset write low indecator
 125                 cbi OW_DDR,OW_PIN   ;release line
 126                 owwh                            ;wait for line is high (it can takes some time cause of the capacity of line)
 127 pro_loop1:
 128                 tst smode                       ;smode=1 for slave sends to master
 129                 breq pro_loop_resv
 130 pro_loop_send:
 131                 tst bitp
 132                 brne pro_loop_send1
 133                 rcall pro_hb
 134                 tst smode
 135                 breq pro_loop_end ; now reading ... do nothing
 136 pro_loop_send1:  ;prebare next bit
 137                 sbrs rwbyte ,0; if bit 0 set in rwbyte then skip next command
 138                 inc writelow
 139                 lsl bitp
 140                 ror rwbyte
 141                 rjmp pro_loop_end
 142
 143 pro_loop_resv:
 144                 ldi param,15  ;wait 15us
 145                 rcall wait_time
 146                 lsr rwbyte
 147                 ;cbi PORTB,0
 148                 sbic OW_PINN,OW_PIN  ;test line
 149                 ori rwbyte,0x80
 150                 lsl bitp
 151                 brne pro_loop_end ;no handle need
 152                 rcall pro_hb
 153                 tst smode
 154                 brne pro_loop_send ; Nach dem Gelesen byte koennte gesendet werden muessen....
 155 pro_loop_end:
 156                 //owwh
 157                 out TCNT0,zero
 158 pro_loop_end_test_reset:
 159                 sbic OW_PINN,OW_PIN  //leitung wieder high
 160                 rjmp pro_loop
 161                 in temp,TCNT0
 162                 cpi temp,130
 163                 brlo pro_loop_end_test_reset
 164                 rcall pro_sleep_s2
 165                 rjmp pro_loop
 166
 167
 168
 169
 170 pro_sleep:
 171                 out TCNT0,zero
 172 pro_sleep_s1:
 173                 sbic OW_PINN,OW_PIN  //leitung wieder high
 174                 ret
 175                 in temp,TCNT0
 176                 cpi temp,200
 177                 brlo pro_sleep_s1
 178                 //leitung wieder high
 179 pro_sleep_s2:
 180                 owwh
 181                 ldi param,40
 182                 rcall wait_time
 183                 //Presents Impuls
 184                 sbi OW_DDR,OW_PIN
 185                 ldi param,130
 186                 rcall wait_time
 187                 cbi OW_DDR,OW_PIN
 188                 //init read byte
 189                 ldi bitp,0x01
 190                 ldi rwbyte,0
 191                 clr smode
 192                 ldi mode,OWM_READ_ROM_COMMAND
 193                 //Wait for all other devices presents impuls finished
 194                 ldi param,40
 195                 rcall wait_time
 196                 ret
 197
 198
 199
 200 pro_hb:
 201                 ldi ZL,low(pro_stable)
 202                 ldi ZH,high(pro_stable)
 203                 add ZL,mode
 204                 adc ZH,zero
 205                 icall
 206                 ret
 207
 208 pro_stable:
 209                 rjmp pro_read_rom_command
 210                 rjmp pro_sleep
 211                 rjmp pro_match_rom
 212                 rjmp pro_search_rom_s
 213                 rjmp pro_search_rom_r
 214                 rjmp pro_read_command
 215                 rjmp pro_write_scratchpad
 216                 rjmp pro_read_scratchpad
 217                 rjmp pro_programm_page
 218                 rjmp pro_recall_flash
 219
 220 pro_read_rom_command:
 221                 ldi mode,OWM_SLEEP
 222                 cpi rwbyte,0xCC
 223                 brne pro_rcc_1
 224                 ldi mode,OWM_READ_COMMAND
 225                 rjmp pro_out_bitp1
 226 pro_rcc_1:
 227                 cpi rwbyte,0xF0
 228                 brne pro_rcc_2
 229                 ldi XL,low(sowid)  ;init sram pointer
 230                 ldi XH,high(sowid)
 231                 ld srbyte,X+
 232                 ldi bytep,0
 233                 rjmp pro_serchrom_next_bit
 234 pro_rcc_2:
 235                 cpi rwbyte,0x55
 236                 brne pro_rcc_3
 237 //              rcall pro_owidinit
 238                 ldi XL,low(sowid)  ;init sram pointer
 239                 ldi XH,high(sowid)
 240                 ldi mode,OWM_MATCH_ROM
 241                 rjmp pro_out_bytep0
 242
 243 pro_rcc_3:
 244                 ret
 245
 246 pro_match_rom:
 247                 ld temp,X+
 248                 cp temp,rwbyte
 249                 breq pro_match_rom_next
 250                 ldi mode,OWM_SLEEP
 251                 ret
 252 pro_match_rom_next:
 253                 cpi XL,SRAM_START+8
 254                 breq pro_match_rom_found
 255                 rjmp pro_out_bitp1
 256 pro_match_rom_found:
 257             ldi mode,OWM_READ_COMMAND
 258                 rjmp pro_out_bitp1
 259
 260 pro_read_command:
 261                 ldi mode,OWM_SLEEP
 262                 cpi rwbyte,0x0F
 263                 brne pro_rc_1
 264                 ldi mode,OWM_WRITE_SCRATCHPAD
 265                 ldi XL,low(scratchpad)  ;init sram pointer
 266                 ldi XH,high(scratchpad)
 267                 rjmp pro_out_bytep0
 268 pro_rc_1:
 269                 cpi rwbyte,0xAA
 270                 brne pro_rc_2
 271                 ldi mode,OWM_READ_SCRATCHPAD
 272                 ldi XL,low(scratchpad)  ;init sram pointer
 273                 ldi XH,high(scratchpad)
 274                 inc smode
 275                 ld rwbyte,X+
 276                 rjmp pro_out_bytep0
 277
 278 pro_rc_2:
 279                 cpi rwbyte,0xB8
 280                 brne pro_rc_3
 281                 ldi mode,OWM_RECALL_FLASH
 282                 ldi XL,low(scratchpad)  ;init sram pointer
 283                 ldi XH,high(scratchpad)
 284                 rjmp pro_out_bytep0
 285 pro_rc_3:
 286                 cpi rwbyte,0x55
 287                 brne pro_rc_4
 288                 ldi mode,OWM_SLEEP
 289                 rjmp pro_programm_page
 290
 291 pro_rc_4:
 292                 cpi rwbyte,0x89
 293                 brne pro_rc_5
 294                 rjmp jreset
 295 pro_rc_5:
 296                 cpi rwbyte,0x8B
 297                 brne pro_rc_6
 298                 ldi XL,low(E2END)
 299                 ldi XH,high(E2END)
 300                 subi XL,7
 301                 out EEARH,XH
 302                 out EEARL,XL
 303                 ldi temp, (0<<EEPM1)|(0<<EEPM0)
 304                 out EECR, temp
 305                 ldi temp,0xFF
 306                 out EEDR, temp
 307                 sbi EECR, EEMPE
 308                 sbi EECR, EEPE
 309                 ret
 310
 311
 312 pro_rc_6:
 313                 ret
 314
 315
 316 pro_write_scratchpad:
 317                 st X+,rwbyte
 318                 cpi XL,SRAM_START+8+66
 319                 brlo pro_write_scratchpad_next
 320                 ldi mode,OWM_SLEEP
 321                 ret
 322 pro_write_scratchpad_next:
 323                 ldi bitp,1
 324                 ret
 325
 326 pro_read_scratchpad:
 327                 cpi XL,SRAM_START+8+66
 328                 brlo pro_read_scratchpad_next
 329                 ldi mode,OWM_SLEEP
 330                 clr smode
 331                 ret
 332 pro_read_scratchpad_next:
 333                 ld rwbyte,X+
 334                 rjmp pro_out_bitp1
 335
 336
 337 pro_programm_page:
 338 .equ PAGESIZEB = PAGESIZE*2;PAGESIZEB is page size in BYTES, not words
 339 // .org SMALLBOOTSTART
 340 write_page:
 341                 ;transfer data from RAM to Flash page buffer
 342                 ldi bytep, PAGESIZEB ;init loop variable
 343                 ldi YL,low(scratchpad)  ;init sram pointer
 344                 ldi YH,high(scratchpad)
 345                 ld ZL,Y+
 346                 ld ZH,Y+
 347                 ;page erase
 348                 ldi spmcrval, (1<<PGERS) + (1<<SPMEN)
 349                 rcall do_spm
 350 wrloop:
 351                 ld r0, Y+
 352                 ld r1, Y+
 353                 ldi spmcrval, (1<<SPMEN)
 354                 rcall do_spm
 355                 adiw ZH:ZL, 2
 356                 subi bytep, 2;use subi for PAGESIZEB<=256
 357                 brne wrloop
 358                 ;execute page write
 359                 subi ZL, low(PAGESIZEB) ;restore pointer
 360                 sbci ZH, high(PAGESIZEB) ;not required for PAGESIZEB<=256
 361                 ldi spmcrval, (1<<PGWRT) + (1<<SPMEN)
 362                 rcall do_spm
 363                 ;read back and check, optional
 364                 ldi bytep, PAGESIZEB
 365                 subi YL, low(PAGESIZEB) ;restore pointer
 366                 sbci YH, high(PAGESIZEB)
 367 rdloop:
 368                 lpm r0, Z+
 369                 ld r1, Y+
 370                 cpse r0, r1
 371                 rjmp error
 372                 subi bytep, 2;use subi for PAGESIZEB<=256
 373                 brne rdloop
 374                 ;return
 375                 ret
 376 do_spm:
 377                  ;input: spmcrval determines SPM action
 378                 ;disable interrupts if enabled, store status
 379                 in temp2, SREG
 380                 cli
 381                 ;check for previous SPM complete
 382 wait:
 383                 in temp, SPMCSR
 384                 sbrc temp, SPMEN
 385                 rjmp wait
 386                 ;SPM timed sequence
 387                 out SPMCSR, spmcrval
 388                 spm
 389                 ;restore SREG (to enable interrupts if originally enabled)
 390                 out SREG, temp2
 391                 ret
 392
 393 error:
 394
 395
 396                 ret
 397
 398 pro_recall_flash:
 399                 st X+,rwbyte
 400                 ;inc bytep
 401                 cpi XL,SRAM_START+8+2
 402                 brlo pro_out_bitp1;pro_recall_flash_next
 403                 lds ZL,scratchpad
 404                 lds ZH,scratchpad+1
 405 pro_recall_flash_cl:
 406                 lpm temp,Z+
 407                 st X+,temp
 408                 cpi XL,SRAM_START+8+66
 409                 brne pro_recall_flash_cl
 410                 ldi mode,OWM_SLEEP
 411                 ret
 412
 413 pro_out_read_command:
 414                 ldi mode,OWM_READ_COMMAND
 415 pro_out_bytep0:
 416                 ldi bytep,0
 417 pro_out_bitp1:
 418                 ldi bitp,1
 419                 ret
 420
 421
 422
 423 pro_serchrom_next_bit:
 424                 mov rwbyte,srbyte
 425                 mov temp2,rwbyte
 426                 com rwbyte
 427                 ror temp2  ;first bit in C
 428                 rol rwbyte ;C in first bit
 429                 inc smode
 430                 ldi bitp,0x40
 431                 ldi mode,OWM_SEARCH_ROM_R  ;next mod Resive
 432                 ret
 433
 434
 435 pro_search_rom_s:
 436                 clr temp2
 437                 lsr srbyte ;shift in C lowest bit
 438                 ror temp2  ; shift in temp2 as highest bit
 439                 andi rwbyte,0x80  ;  clear other bits
 440                 eor temp2,rwbyte
 441                 breq pro_search_rom_s_goon
 442                 ldi mode,OWM_SLEEP
 443                 ret
 444 pro_search_rom_s_goon:
 445                 inc bytep
 446                 mov temp2,bytep
 447                 andi temp2,0x07
 448                 brne pro_serchrom_next_bit ;prepare next bit
 449                 mov temp2,bytep
 450                 andi temp2,0x40 ;;end
 451                 brne pro_search_rom_found
 452                 ;read next byte
 453                 ld srbyte,X+
 454                 rjmp pro_serchrom_next_bit
 455
 456 pro_search_rom_found:
 457                 ldi mode,OWM_READ_COMMAND
 458                 rjmp pro_out_bytep0
 459
 460 pro_search_rom_r:
 461                 clr smode
 462                 ldi mode,OWM_SEARCH_ROM_S
 463                 ldi bitp,0  ;go to searchrom_s after bit get
 464                 ret
 465
 466 pro_owid: .DB  0xA3, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 0x55, 0xFA
 467
 468
 469
 470
 471
 472 wait_time:
 473                 out TCNT0,zero
 474 wait_time1:
 475                 in temp,TCNT0
 476                 cp temp,param
 477                 brlo wait_time1
 478                 ret
 479
 480
 481 .DSEG
 482 sowid: .BYTE 8
 483 scratchpad: .BYTE 66