Mercurial > public > hwos_code
annotate src/external_flash.asm @ 593:c31e0292bc92
doc update (clarification/correction of max. depth reading header data)
| author | heinrichsweikamp |
|---|---|
| date | Sat, 28 Apr 2018 11:26:08 +0200 |
| parents | b455b31ce022 |
| children | ca4556fb60b9 |
| rev | line source |
|---|---|
| 0 | 1 ;============================================================================= |
| 2 ; | |
| 582 | 3 ; File external_flash.asm ## V2.98 |
| 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 | |
| 582 | 15 basic CODE |
| 0 | 16 ;============================================================================= |
| 17 | |
| 582 | 18 global incf_ext_flash_address_p1 |
| 0 | 19 incf_ext_flash_address_p1: ; Increase by one |
| 20 movlw .1 | |
| 21 | |
| 22 global incf_ext_flash_address0 | |
| 23 incf_ext_flash_address0: | |
| 582 | 24 addwf ext_flash_address+0,F ; increase address |
| 25 movlw d'0' | |
| 26 addwfc ext_flash_address+1,F | |
| 27 addwfc ext_flash_address+2,F | |
| 0 | 28 |
| 582 | 29 movlw 0x40 |
| 30 cpfseq ext_flash_address+2 ; at address 40FFFF? | |
| 0 | 31 return ; No, return |
| 582 | 32 ; clrf ext_flash_address+0 |
| 33 ; clrf ext_flash_address+1 | |
| 34 clrf ext_flash_address+2 ; Yes, rollover to 0x000000 | |
| 0 | 35 return |
| 36 | |
| 582 | 37 |
| 38 global incf_ext_flash_address0_p1_0x20 | |
| 0 | 39 incf_ext_flash_address0_p1_0x20: ; Increase by one |
| 582 | 40 movlw .1 |
| 0 | 41 |
| 582 | 42 global incf_ext_flash_address0_0x20 |
| 43 incf_ext_flash_address0_0x20: ; with roll-over at 0x200000 to 0x000000 | |
| 44 addwf ext_flash_address+0,F ; increase address | |
| 45 movlw d'0' | |
| 46 addwfc ext_flash_address+1,F | |
| 47 addwfc ext_flash_address+2,F | |
| 48 movlw 0x20 | |
| 49 cpfseq ext_flash_address+2 ; at address 0x200000? | |
| 50 return ; No, return | |
| 51 ; clrf ext_flash_address+0 | |
| 52 ; clrf ext_flash_address+1 | |
| 53 clrf ext_flash_address+2 ; Yes, rollover to 0x000000 | |
| 54 return | |
| 0 | 55 |
| 56 | |
| 57 global decf_ext_flash_address0 | |
| 58 decf_ext_flash_address0: | |
| 582 | 59 subwf ext_flash_address+0,F ; decrease address: do a 16-8bits subtract |
| 60 movlw d'0' | |
| 61 subwfb ext_flash_address+1,F | |
| 62 movlw d'0' | |
| 63 subwfb ext_flash_address+2,F | |
| 64 btfss ext_flash_address+2,7 ; Rollover to 0xFFFFFF? | |
| 0 | 65 return ; No, return |
| 582 | 66 clrf ext_flash_address+2 ; Set to 0x00FFFFF |
| 67 setf ext_flash_address+1 | |
| 68 setf ext_flash_address+0 | |
| 0 | 69 return |
| 70 | |
| 582 | 71 |
| 72 global ext_flash_byte_read_plus ; Return data read in WREG and SSP2BUF and | |
| 73 ext_flash_byte_read_plus: ; increase address after read | |
| 0 | 74 rcall ext_flash_byte_read |
| 582 | 75 movwf ext_flash_rw ; store received data |
| 76 bra incf_ext_flash_address_p1 ; +1 and return | |
| 0 | 77 |
| 582 | 78 |
| 79 global ext_flash_byte_read_plus_0x20 ; Return data read in WREG and SSP2BUF and | |
| 80 ext_flash_byte_read_plus_0x20: ; increase address after read with banking at 0x200000 | |
| 0 | 81 rcall ext_flash_byte_read |
| 582 | 82 movwf ext_flash_rw ; store received data |
| 83 bra incf_ext_flash_address0_p1_0x20 ;+1 and return | |
| 0 | 84 |
| 85 | |
| 582 | 86 global ext_flash_byte_read ; Return data read in WREG |
| 0 | 87 ext_flash_byte_read: |
| 582 | 88 movlw 0x03 ; Read command |
| 89 rcall write_spi | |
| 90 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 91 rcall write_spi ; Dummy write to read data into WREG | |
| 92 bsf flash_ncs ; CS=1 | |
| 93 movwf ext_flash_rw | |
| 94 return ; Return data read in WREG and ext_flash_rw | |
| 95 | |
| 0 | 96 |
| 582 | 97 ext_flash_write_address: ; Write 24bit address ext_flash_address:3 via SPI |
| 98 movf ext_flash_address+2,W ; 24Bit Address | |
| 99 rcall write_spi | |
| 100 movf ext_flash_address+1,W | |
| 101 rcall write_spi | |
| 102 movf ext_flash_address+0,W | |
| 103 bra write_spi ; And return.... | |
| 104 | |
| 0 | 105 |
| 106 global ext_flash_read_block_start ; Return data read in WREG | |
| 107 ext_flash_read_block_start: | |
| 582 | 108 movlw 0x03 ; Read command |
| 109 rcall write_spi | |
| 110 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 111 rcall write_spi ; Dummy write to read data into WREG | |
| 112 return ; Return data read in WREG | |
| 0 | 113 |
| 582 | 114 |
| 115 global ext_flash_read_block ; Return data read in WREG | |
| 0 | 116 ext_flash_read_block: |
| 582 | 117 rcall incf_ext_flash_address_p1 ; Increase address +1 |
| 118 bra write_spi1 ; Dummy write to read data into WREG and return | |
| 119 | |
| 0 | 120 |
| 582 | 121 global ext_flash_read_block_stop ; Return data read in WREG |
| 0 | 122 ext_flash_read_block_stop: |
| 582 | 123 bsf flash_ncs ; CS=1 |
| 124 return ; NO data in WREG | |
| 125 | |
| 0 | 126 |
| 127 global write_byte_ext_flash_plus_header | |
| 582 | 128 write_byte_ext_flash_plus_header: ; Write from WREG and increase address after write |
| 129 movwf ext_flash_rw ; store data | |
| 0 | 130 ; test if write is done at first byte of 4kB block |
| 131 ; if yes -> delete 4kB block first | |
| 582 | 132 tstfsz ext_flash_address+0 ; at 0x00? |
| 133 bra write_byte_ext_flash_plus_h1 ; No, normal Write | |
| 134 movf ext_flash_address+1,W | |
| 135 andlw 0x0F ; Mask lower nibble | |
| 136 tstfsz WREG ; at 0x.0? | |
| 137 bra write_byte_ext_flash_plus_h1 ; No, normal Write | |
| 138 ; At beginning of 4kB block -> erase first! | |
| 139 rcall ext_flash_erase4kB ; Erases 4kB sector @ext_flash_address:3 | |
| 140 write_byte_ext_flash_plus_h1: | |
| 141 movf ext_flash_rw,W | |
| 142 rcall ext_flash_byte_write ; Write the byte | |
| 143 bra incf_ext_flash_address_p1 ; +1 and return | |
| 0 | 144 |
| 145 | |
| 582 | 146 global write_byte_ext_flash_plus_nocnt ; No increase of ext_flash_dive_counter:3 |
| 279 | 147 write_byte_ext_flash_plus_nocnt: |
| 582 | 148 movwf ext_flash_rw ; store data |
| 149 bra write_byte_ext_flash_plus2 | |
| 150 | |
| 279 | 151 |
| 582 | 152 global write_byte_ext_flash_plus_nodel ; Does NOT delete 4kB Page when required |
| 153 write_byte_ext_flash_plus_nodel: ; Write from WREG and increase address after write with banking at 0x200000 | |
| 154 movwf ext_flash_rw ; store data | |
| 155 bra write_byte_ext_flash_plus1 ; Ignore possible begin of 4kB page, there have been written 0xFF already | |
| 6 | 156 |
| 582 | 157 global write_byte_ext_flash_plus ; Write from WREG and increase address after write with banking at 0x200000 |
| 0 | 158 write_byte_ext_flash_plus: |
| 582 | 159 movwf ext_flash_rw ; store data |
| 160 ; First, increase dive length counter | |
| 161 incf ext_flash_dive_counter+0,F | |
| 162 movlw .0 | |
| 163 addwfc ext_flash_dive_counter+1,F | |
| 164 addwfc ext_flash_dive_counter+2,F ; 24bit++ | |
| 0 | 165 |
| 6 | 166 write_byte_ext_flash_plus2: |
| 0 | 167 ; Now test if write is done at first byte of 4kB block |
| 168 ; if yes -> delete 4kB block first | |
| 582 | 169 tstfsz ext_flash_address+0 ; at 0x00? |
| 170 bra write_byte_ext_flash_plus1 ; No, normal Write | |
| 171 movf ext_flash_address+1,W | |
| 172 andlw 0x0F ; Mask lower nibble | |
| 173 tstfsz WREG ; at 0x.0? | |
| 174 bra write_byte_ext_flash_plus1 ; No, normal Write | |
| 175 ; At beginning of 4kB block -> erase first! | |
| 176 rcall ext_flash_erase4kB ; Erases 4kB sector @ext_flash_address:3 | |
| 177 write_byte_ext_flash_plus1: | |
| 178 movf ext_flash_rw,W | |
| 179 rcall ext_flash_byte_write ; Write the byte | |
| 180 bra incf_ext_flash_address0_p1_0x20 ; +1 and roll over at 0x200000 to 0x000000 and return | |
| 0 | 181 |
| 182 | |
| 582 | 183 global ext_flash_byte_write ; Write from WREG |
| 0 | 184 ext_flash_byte_write: |
| 582 | 185 movwf ext_flash_rw ; store data byte |
| 186 bsf flash_ncs ; CS=1 | |
| 187 movlw 0x06 ; WREN command | |
| 188 rcall write_spi | |
| 189 bsf flash_ncs ; CS=1 | |
| 190 movlw 0x02 ; Write (PP, Page-Program) command | |
| 191 rcall write_spi | |
| 192 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 193 movf ext_flash_rw,W ; load data byte | |
| 194 rcall write_spi ; write one byte of data! | |
| 195 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
|
196 |
| 582 | 197 |
| 198 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
|
199 ext_flash_byte_write_comms: |
| 582 | 200 movwf ext_flash_rw ; store data byte |
| 201 bsf flash_ncs ; CS=1 | |
| 202 movlw 0x06 ; WREN command | |
| 203 rcall write_spi | |
| 204 bsf flash_ncs ; CS=1 | |
| 205 movlw 0x02 ; Write (PP, Page-Program) command | |
| 206 rcall write_spi | |
| 207 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 208 movf ext_flash_rw,W ; load data byte | |
| 209 rcall write_spi ; write one byte of data! | |
| 210 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
|
211 return |
| 582 | 212 |
| 0 | 213 |
| 582 | 214 global ext_flash_disable_protection ; Disable write protection |
| 215 ext_flash_disable_protection: | |
| 216 ; unlock old memory | |
| 217 bsf flash_ncs ; CS=1 | |
| 218 movlw 0x50 ; EWSR command | |
| 219 rcall write_spi | |
| 220 bsf flash_ncs ; CS=1 | |
| 221 movlw 0x01 ; WRSR command | |
| 222 rcall write_spi | |
| 223 movlw b'00000000' ; New status | |
| 224 rcall write_spi | |
| 225 bsf flash_ncs ; CS=1 | |
| 226 ; unlock new memory | |
| 227 movlw 0x06 ; WREN command | |
| 228 rcall write_spi | |
| 229 bsf flash_ncs ; CS=1 | |
| 230 movlw 0x98 ; ULBPR command | |
| 231 rcall write_spi | |
| 232 bsf flash_ncs ; CS=1 | |
| 233 movlw 0x06 ; WREN command | |
| 234 rcall write_spi | |
| 235 bsf flash_ncs ; CS=1 | |
| 236 movlw 0x42 ; WBPR command | |
| 237 rcall write_spi | |
| 238 movlw .18 | |
| 239 movwf lo | |
| 420 | 240 ext_flash_disable_protection2: |
| 582 | 241 movlw 0x00 |
| 242 rcall write_spi | |
| 243 decfsz lo,F ; 18 bytes with 0x00 | |
| 244 bra ext_flash_disable_protection2 | |
| 245 bsf flash_ncs ; CS=1 | |
| 0 | 246 return |
| 247 | |
| 248 global ext_flash_enable_protection | |
| 249 ext_flash_enable_protection: | |
| 582 | 250 ; lock old memory |
| 251 bsf flash_ncs ; CS=1 | |
| 252 movlw 0x50 ; EWSR command | |
| 253 rcall write_spi | |
| 254 bsf flash_ncs ; CS=1 | |
| 255 movlw 0x01 ; WRSR command | |
| 256 rcall write_spi | |
| 257 movlw b'00011100' ; New status (Write protect on) | |
| 258 rcall write_spi | |
| 259 bsf flash_ncs ; CS=1 | |
| 260 ; lock new memory | |
| 261 ; movlw 0x06 ; WREN command | |
| 262 ; rcall write_spi | |
| 263 ; bsf flash_ncs ; CS=1 | |
| 264 ; movlw 0x8D ; LBPR command | |
| 265 ; rcall write_spi | |
| 266 ; bsf flash_ncs ; CS=1 | |
| 267 movlw 0x06 ; WREN command | |
| 268 rcall write_spi | |
| 269 bsf flash_ncs ; CS=1 | |
| 270 movlw 0x42 ; WBPR command | |
| 271 rcall write_spi | |
| 272 movlw .18 | |
| 273 movwf lo | |
| 414 | 274 ext_flash_enable_protection2: |
| 582 | 275 movlw 0xFF |
| 276 rcall write_spi | |
| 277 decfsz lo,F ; 18 bytes with 0xFF | |
| 278 bra ext_flash_enable_protection2 | |
| 279 bsf flash_ncs ; CS=1 | |
| 0 | 280 return |
| 281 | |
| 282 | |
| 582 | 283 global ext_flash_erase4kB ; Erases 4kB sector |
| 0 | 284 ext_flash_erase4kB: |
| 582 | 285 bsf flash_ncs ; CS=1 |
| 286 movlw 0x06 ; WREN command | |
| 287 rcall write_spi | |
| 288 bsf flash_ncs ; CS=1 | |
| 289 movlw 0x20 ; Sector erase command | |
| 290 rcall write_spi | |
| 291 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI | |
| 292 ; bra ext_flash_wait_write ; Wait for write... and return | |
| 0 | 293 ext_flash_wait_write: |
| 582 | 294 bsf flash_ncs ; CS=1 |
| 295 ; WAITMS d'1' ; TBE/TSE=25ms... | |
| 296 movlw 0x05 ; RDSR command | |
| 297 rcall write_spi ; Read status | |
| 298 rcall write_spi ; Read status into WREG | |
| 299 bsf flash_ncs ; CS=1 | |
| 300 btfsc SSP2BUF,0 ; Write operation in process? | |
| 301 bra ext_flash_wait_write ; Yes, wait more.. | |
| 0 | 302 return |
| 303 | |
| 582 | 304 |
| 305 global ext_flash_erase_logbook ; erases logbook memory (000000h -> 2FFFFFh -> 3MByte -> 3145728 Bytes) | |
| 0 | 306 ext_flash_erase_logbook: |
| 582 | 307 bsf flash_ncs ; CS=1 |
| 308 clrf ext_flash_address+0 | |
| 309 clrf ext_flash_address+1 | |
| 310 clrf ext_flash_address+2 | |
| 0 | 311 |
| 582 | 312 setf ext_flash_rw ; 256*12kB=3145728 Bytes |
| 0 | 313 ext_flash_erase_logbook_loop: |
| 582 | 314 rcall ext_flash_erase4kB ; 4kB |
| 315 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB | |
| 316 rcall ext_flash_erase4kB ; 4kB | |
| 317 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB | |
| 318 rcall ext_flash_erase4kB ; 4kB | |
| 319 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB | |
| 320 decfsz ext_flash_rw,F | |
| 321 bra ext_flash_erase_logbook_loop | |
| 0 | 322 return |
| 323 | |
| 414 | 324 ext_flash_add_4kB: |
| 582 | 325 movlw 0x10 |
| 326 addwf ext_flash_address+1,F | |
| 327 movlw d'0' | |
| 328 addwfc ext_flash_address+2,F | |
| 329 return | |
| 414 | 330 |
| 0 | 331 |
| 582 | 332 write_spi: ; With data in WREG... |
| 333 bcf flash_ncs ; CS | |
| 0 | 334 global write_spi1 |
| 582 | 335 write_spi1: ; With data in WREG... |
| 336 bcf SSP2STAT,WCOL ; Clear flag | |
| 337 movwf SSP2BUF ; Write to buffer | |
| 338 btfsc SSP2STAT,WCOL ; Was buffer full? | |
| 339 bra write_spi1 ; Yes, try again | |
| 340 write_spi2: ; Wait for write command | |
| 341 btfss SSP2STAT, BF ; Buffer full? | |
| 342 bra write_spi2 ; No, wait. | |
| 343 movf SSP2BUF,W | |
| 344 return ; Returns RX data in WREG and SSP2BUF | |
| 0 | 345 |
| 582 | 346 END |