Mercurial > public > hwos_code
annotate src/external_flash.asm @ 605:5ce603c29750
gas color coding fixed
| author | heinrichsweikamp |
|---|---|
| date | Sun, 25 Nov 2018 13:21:52 +0100 |
| parents | ca4556fb60b9 |
| children | c40025d8e750 |
| rev | line source |
|---|---|
| 0 | 1 ;============================================================================= |
| 2 ; | |
| 604 | 3 ; File external_flash.asm ## V2.98c |
| 0 | 4 ; |
| 5 ; External flash | |
| 6 ; | |
| 7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved. | |
| 8 ;============================================================================= | |
| 9 ; HISTORY | |
| 10 ; 2011-08-12 : [mH] creation | |
| 11 | |
| 275 | 12 #include "hwos.inc" |
| 0 | 13 #include "wait.inc" |
| 14 | |
| 604 | 15 ext_flash CODE |
| 16 | |
| 0 | 17 ;============================================================================= |
| 18 | |
| 582 | 19 global incf_ext_flash_address_p1 |
| 0 | 20 incf_ext_flash_address_p1: ; Increase by one |
| 21 movlw .1 | |
| 22 | |
| 23 global incf_ext_flash_address0 | |
| 24 incf_ext_flash_address0: | |
| 582 | 25 addwf ext_flash_address+0,F ; increase address |
| 26 movlw d'0' | |
| 27 addwfc ext_flash_address+1,F | |
| 28 addwfc ext_flash_address+2,F | |
| 0 | 29 |
| 582 | 30 movlw 0x40 |
| 31 cpfseq ext_flash_address+2 ; at address 40FFFF? | |
| 0 | 32 return ; No, return |
| 582 | 33 ; clrf ext_flash_address+0 |
| 34 ; clrf ext_flash_address+1 | |
| 35 clrf ext_flash_address+2 ; Yes, rollover to 0x000000 | |
| 0 | 36 return |
| 37 | |
| 582 | 38 |
| 39 global incf_ext_flash_address0_p1_0x20 | |
| 0 | 40 incf_ext_flash_address0_p1_0x20: ; Increase by one |
| 582 | 41 movlw .1 |
| 0 | 42 |
| 582 | 43 global incf_ext_flash_address0_0x20 |
| 44 incf_ext_flash_address0_0x20: ; with roll-over at 0x200000 to 0x000000 | |
| 45 addwf ext_flash_address+0,F ; increase address | |
| 46 movlw d'0' | |
| 47 addwfc ext_flash_address+1,F | |
| 48 addwfc ext_flash_address+2,F | |
| 49 movlw 0x20 | |
| 50 cpfseq ext_flash_address+2 ; at address 0x200000? | |
| 51 return ; No, return | |
| 52 ; clrf ext_flash_address+0 | |
| 53 ; clrf ext_flash_address+1 | |
| 54 clrf ext_flash_address+2 ; Yes, rollover to 0x000000 | |
| 55 return | |
| 0 | 56 |
| 57 | |
| 58 global decf_ext_flash_address0 | |
| 59 decf_ext_flash_address0: | |
| 582 | 60 subwf ext_flash_address+0,F ; decrease address: do a 16-8bits subtract |
| 61 movlw d'0' | |
| 62 subwfb ext_flash_address+1,F | |
| 63 movlw d'0' | |
| 64 subwfb ext_flash_address+2,F | |
| 65 btfss ext_flash_address+2,7 ; Rollover to 0xFFFFFF? | |
| 0 | 66 return ; No, return |
| 582 | 67 clrf ext_flash_address+2 ; Set to 0x00FFFFF |
| 68 setf ext_flash_address+1 | |
| 69 setf ext_flash_address+0 | |
| 0 | 70 return |
| 71 | |
| 582 | 72 |
| 73 global ext_flash_byte_read_plus ; Return data read in WREG and SSP2BUF and | |
| 74 ext_flash_byte_read_plus: ; increase address after read | |
| 0 | 75 rcall ext_flash_byte_read |
| 582 | 76 movwf ext_flash_rw ; store received data |
| 77 bra incf_ext_flash_address_p1 ; +1 and return | |
| 0 | 78 |
| 582 | 79 |
| 80 global ext_flash_byte_read_plus_0x20 ; Return data read in WREG and SSP2BUF and | |
| 81 ext_flash_byte_read_plus_0x20: ; increase address after read with banking at 0x200000 | |
| 0 | 82 rcall ext_flash_byte_read |
| 582 | 83 movwf ext_flash_rw ; store received data |
| 84 bra incf_ext_flash_address0_p1_0x20 ;+1 and return | |
| 0 | 85 |
| 86 | |
| 582 | 87 global ext_flash_byte_read ; Return data read in WREG |
| 0 | 88 ext_flash_byte_read: |
| 582 | 89 movlw 0x03 ; Read command |
| 90 rcall write_spi | |
| 91 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 92 rcall write_spi ; Dummy write to read data into WREG | |
| 93 bsf flash_ncs ; CS=1 | |
| 94 movwf ext_flash_rw | |
| 95 return ; Return data read in WREG and ext_flash_rw | |
| 96 | |
| 0 | 97 |
| 582 | 98 ext_flash_write_address: ; Write 24bit address ext_flash_address:3 via SPI |
| 99 movf ext_flash_address+2,W ; 24Bit Address | |
| 100 rcall write_spi | |
| 101 movf ext_flash_address+1,W | |
| 102 rcall write_spi | |
| 103 movf ext_flash_address+0,W | |
| 104 bra write_spi ; And return.... | |
| 105 | |
| 0 | 106 |
| 107 global ext_flash_read_block_start ; Return data read in WREG | |
| 108 ext_flash_read_block_start: | |
| 582 | 109 movlw 0x03 ; Read command |
| 110 rcall write_spi | |
| 111 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 112 rcall write_spi ; Dummy write to read data into WREG | |
| 113 return ; Return data read in WREG | |
| 0 | 114 |
| 582 | 115 |
| 116 global ext_flash_read_block ; Return data read in WREG | |
| 0 | 117 ext_flash_read_block: |
| 582 | 118 rcall incf_ext_flash_address_p1 ; Increase address +1 |
| 119 bra write_spi1 ; Dummy write to read data into WREG and return | |
| 120 | |
| 0 | 121 |
| 582 | 122 global ext_flash_read_block_stop ; Return data read in WREG |
| 0 | 123 ext_flash_read_block_stop: |
| 582 | 124 bsf flash_ncs ; CS=1 |
| 125 return ; NO data in WREG | |
| 126 | |
| 0 | 127 |
| 128 global write_byte_ext_flash_plus_header | |
| 582 | 129 write_byte_ext_flash_plus_header: ; Write from WREG and increase address after write |
| 130 movwf ext_flash_rw ; store data | |
| 0 | 131 ; test if write is done at first byte of 4kB block |
| 132 ; if yes -> delete 4kB block first | |
| 582 | 133 tstfsz ext_flash_address+0 ; at 0x00? |
| 134 bra write_byte_ext_flash_plus_h1 ; No, normal Write | |
| 135 movf ext_flash_address+1,W | |
| 136 andlw 0x0F ; Mask lower nibble | |
| 137 tstfsz WREG ; at 0x.0? | |
| 138 bra write_byte_ext_flash_plus_h1 ; No, normal Write | |
| 139 ; At beginning of 4kB block -> erase first! | |
| 140 rcall ext_flash_erase4kB ; Erases 4kB sector @ext_flash_address:3 | |
| 141 write_byte_ext_flash_plus_h1: | |
| 142 movf ext_flash_rw,W | |
| 143 rcall ext_flash_byte_write ; Write the byte | |
| 144 bra incf_ext_flash_address_p1 ; +1 and return | |
| 0 | 145 |
| 146 | |
| 582 | 147 global write_byte_ext_flash_plus_nocnt ; No increase of ext_flash_dive_counter:3 |
| 279 | 148 write_byte_ext_flash_plus_nocnt: |
| 582 | 149 movwf ext_flash_rw ; store data |
| 150 bra write_byte_ext_flash_plus2 | |
| 151 | |
| 279 | 152 |
| 582 | 153 global write_byte_ext_flash_plus_nodel ; Does NOT delete 4kB Page when required |
| 154 write_byte_ext_flash_plus_nodel: ; Write from WREG and increase address after write with banking at 0x200000 | |
| 155 movwf ext_flash_rw ; store data | |
| 156 bra write_byte_ext_flash_plus1 ; Ignore possible begin of 4kB page, there have been written 0xFF already | |
| 6 | 157 |
| 582 | 158 global write_byte_ext_flash_plus ; Write from WREG and increase address after write with banking at 0x200000 |
| 0 | 159 write_byte_ext_flash_plus: |
| 582 | 160 movwf ext_flash_rw ; store data |
| 161 ; First, increase dive length counter | |
| 162 incf ext_flash_dive_counter+0,F | |
| 163 movlw .0 | |
| 164 addwfc ext_flash_dive_counter+1,F | |
| 165 addwfc ext_flash_dive_counter+2,F ; 24bit++ | |
| 0 | 166 |
| 6 | 167 write_byte_ext_flash_plus2: |
| 0 | 168 ; Now test if write is done at first byte of 4kB block |
| 169 ; if yes -> delete 4kB block first | |
| 582 | 170 tstfsz ext_flash_address+0 ; at 0x00? |
| 171 bra write_byte_ext_flash_plus1 ; No, normal Write | |
| 172 movf ext_flash_address+1,W | |
| 173 andlw 0x0F ; Mask lower nibble | |
| 174 tstfsz WREG ; at 0x.0? | |
| 175 bra write_byte_ext_flash_plus1 ; No, normal Write | |
| 176 ; At beginning of 4kB block -> erase first! | |
| 177 rcall ext_flash_erase4kB ; Erases 4kB sector @ext_flash_address:3 | |
| 178 write_byte_ext_flash_plus1: | |
| 179 movf ext_flash_rw,W | |
| 180 rcall ext_flash_byte_write ; Write the byte | |
| 181 bra incf_ext_flash_address0_p1_0x20 ; +1 and roll over at 0x200000 to 0x000000 and return | |
| 0 | 182 |
| 183 | |
| 582 | 184 global ext_flash_byte_write ; Write from WREG |
| 0 | 185 ext_flash_byte_write: |
| 582 | 186 movwf ext_flash_rw ; store data byte |
| 187 bsf flash_ncs ; CS=1 | |
| 188 movlw 0x06 ; WREN command | |
| 189 rcall write_spi | |
| 190 bsf flash_ncs ; CS=1 | |
| 191 movlw 0x02 ; Write (PP, Page-Program) command | |
| 192 rcall write_spi | |
| 193 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 194 movf ext_flash_rw,W ; load data byte | |
| 195 rcall write_spi ; write one byte of data! | |
| 196 bra ext_flash_wait_write ; And return... | |
|
423
ccaaac45b61a
_another_ timing fix for firmware updates (2.07 was not published yet anyway)
heinrichsweikamp
parents:
421
diff
changeset
|
197 |
| 582 | 198 |
| 199 global ext_flash_byte_write_comms ; without wait, ~86us fixed delay due to 115200 Bauds | |
|
423
ccaaac45b61a
_another_ timing fix for firmware updates (2.07 was not published yet anyway)
heinrichsweikamp
parents:
421
diff
changeset
|
200 ext_flash_byte_write_comms: |
| 582 | 201 movwf ext_flash_rw ; store data byte |
| 202 bsf flash_ncs ; CS=1 | |
| 203 movlw 0x06 ; WREN command | |
| 204 rcall write_spi | |
| 205 bsf flash_ncs ; CS=1 | |
| 206 movlw 0x02 ; Write (PP, Page-Program) command | |
| 207 rcall write_spi | |
| 208 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 209 movf ext_flash_rw,W ; load data byte | |
| 210 rcall write_spi ; write one byte of data! | |
| 211 bsf flash_ncs ; CS=1 | |
|
423
ccaaac45b61a
_another_ timing fix for firmware updates (2.07 was not published yet anyway)
heinrichsweikamp
parents:
421
diff
changeset
|
212 return |
| 582 | 213 |
| 0 | 214 |
| 582 | 215 global ext_flash_disable_protection ; Disable write protection |
| 216 ext_flash_disable_protection: | |
| 217 ; unlock old memory | |
| 218 bsf flash_ncs ; CS=1 | |
| 219 movlw 0x50 ; EWSR command | |
| 220 rcall write_spi | |
| 221 bsf flash_ncs ; CS=1 | |
| 222 movlw 0x01 ; WRSR command | |
| 223 rcall write_spi | |
| 224 movlw b'00000000' ; New status | |
| 225 rcall write_spi | |
| 226 bsf flash_ncs ; CS=1 | |
| 227 ; unlock new memory | |
| 228 movlw 0x06 ; WREN command | |
| 229 rcall write_spi | |
| 230 bsf flash_ncs ; CS=1 | |
| 231 movlw 0x98 ; ULBPR command | |
| 232 rcall write_spi | |
| 233 bsf flash_ncs ; CS=1 | |
| 234 movlw 0x06 ; WREN command | |
| 235 rcall write_spi | |
| 236 bsf flash_ncs ; CS=1 | |
| 237 movlw 0x42 ; WBPR command | |
| 238 rcall write_spi | |
| 239 movlw .18 | |
| 240 movwf lo | |
| 420 | 241 ext_flash_disable_protection2: |
| 582 | 242 movlw 0x00 |
| 243 rcall write_spi | |
| 244 decfsz lo,F ; 18 bytes with 0x00 | |
| 245 bra ext_flash_disable_protection2 | |
| 246 bsf flash_ncs ; CS=1 | |
| 0 | 247 return |
| 248 | |
| 249 global ext_flash_enable_protection | |
| 250 ext_flash_enable_protection: | |
| 582 | 251 ; lock old memory |
| 252 bsf flash_ncs ; CS=1 | |
| 253 movlw 0x50 ; EWSR command | |
| 254 rcall write_spi | |
| 255 bsf flash_ncs ; CS=1 | |
| 256 movlw 0x01 ; WRSR command | |
| 257 rcall write_spi | |
| 258 movlw b'00011100' ; New status (Write protect on) | |
| 259 rcall write_spi | |
| 260 bsf flash_ncs ; CS=1 | |
| 261 ; lock new memory | |
| 262 ; movlw 0x06 ; WREN command | |
| 263 ; rcall write_spi | |
| 264 ; bsf flash_ncs ; CS=1 | |
| 265 ; movlw 0x8D ; LBPR command | |
| 266 ; rcall write_spi | |
| 267 ; bsf flash_ncs ; CS=1 | |
| 268 movlw 0x06 ; WREN command | |
| 269 rcall write_spi | |
| 270 bsf flash_ncs ; CS=1 | |
| 271 movlw 0x42 ; WBPR command | |
| 272 rcall write_spi | |
| 273 movlw .18 | |
| 274 movwf lo | |
| 414 | 275 ext_flash_enable_protection2: |
| 582 | 276 movlw 0xFF |
| 277 rcall write_spi | |
| 278 decfsz lo,F ; 18 bytes with 0xFF | |
| 279 bra ext_flash_enable_protection2 | |
| 280 bsf flash_ncs ; CS=1 | |
| 0 | 281 return |
| 282 | |
| 283 | |
| 582 | 284 global ext_flash_erase4kB ; Erases 4kB sector |
| 0 | 285 ext_flash_erase4kB: |
| 582 | 286 bsf flash_ncs ; CS=1 |
| 287 movlw 0x06 ; WREN command | |
| 288 rcall write_spi | |
| 289 bsf flash_ncs ; CS=1 | |
| 290 movlw 0x20 ; Sector erase command | |
| 291 rcall write_spi | |
| 292 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 293 ; bra ext_flash_wait_write ; Wait for write... and return | |
| 0 | 294 ext_flash_wait_write: |
| 582 | 295 bsf flash_ncs ; CS=1 |
| 296 ; WAITMS d'1' ; TBE/TSE=25ms... | |
| 297 movlw 0x05 ; RDSR command | |
| 298 rcall write_spi ; Read status | |
| 299 rcall write_spi ; Read status into WREG | |
| 300 bsf flash_ncs ; CS=1 | |
| 301 btfsc SSP2BUF,0 ; Write operation in process? | |
| 302 bra ext_flash_wait_write ; Yes, wait more.. | |
| 0 | 303 return |
| 304 | |
| 582 | 305 |
| 306 global ext_flash_erase_logbook ; erases logbook memory (000000h -> 2FFFFFh -> 3MByte -> 3145728 Bytes) | |
| 0 | 307 ext_flash_erase_logbook: |
| 582 | 308 bsf flash_ncs ; CS=1 |
| 309 clrf ext_flash_address+0 | |
| 310 clrf ext_flash_address+1 | |
| 311 clrf ext_flash_address+2 | |
| 0 | 312 |
| 582 | 313 setf ext_flash_rw ; 256*12kB=3145728 Bytes |
| 0 | 314 ext_flash_erase_logbook_loop: |
| 582 | 315 rcall ext_flash_erase4kB ; 4kB |
| 316 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB | |
| 317 rcall ext_flash_erase4kB ; 4kB | |
| 318 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB | |
| 319 rcall ext_flash_erase4kB ; 4kB | |
| 320 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB | |
| 321 decfsz ext_flash_rw,F | |
| 322 bra ext_flash_erase_logbook_loop | |
| 0 | 323 return |
| 324 | |
| 414 | 325 ext_flash_add_4kB: |
| 582 | 326 movlw 0x10 |
| 327 addwf ext_flash_address+1,F | |
| 328 movlw d'0' | |
| 329 addwfc ext_flash_address+2,F | |
| 330 return | |
| 414 | 331 |
| 0 | 332 |
| 582 | 333 write_spi: ; With data in WREG... |
| 334 bcf flash_ncs ; CS | |
| 0 | 335 global write_spi1 |
| 582 | 336 write_spi1: ; With data in WREG... |
| 337 bcf SSP2STAT,WCOL ; Clear flag | |
| 338 movwf SSP2BUF ; Write to buffer | |
| 339 btfsc SSP2STAT,WCOL ; Was buffer full? | |
| 340 bra write_spi1 ; Yes, try again | |
| 341 write_spi2: ; Wait for write command | |
| 342 btfss SSP2STAT, BF ; Buffer full? | |
| 343 bra write_spi2 ; No, wait. | |
| 344 movf SSP2BUF,W | |
| 345 return ; Returns RX data in WREG and SSP2BUF | |
| 0 | 346 |
| 582 | 347 END |