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comparison src/external_flash.asm @ 423:ccaaac45b61a

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_another_ timing fix for firmware updates (2.07 was not published yet anyway)
author heinrichsweikamp
date Mon, 02 May 2016 12:41:20 +0200
parents 3895adc3477f
children 9c54849b8d3b
comparison
equal deleted inserted replaced
422:70e44a442689 423:ccaaac45b61a
185 movlw 0x02 ; Write (PP, Page-Program) command 185 movlw 0x02 ; Write (PP, Page-Program) command
186 rcall write_spi 186 rcall write_spi
187 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI 187 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI
188 movf temp1,W ; load data byte 188 movf temp1,W ; load data byte
189 rcall write_spi ; write one byte of data! 189 rcall write_spi ; write one byte of data!
190 bsf flash_ncs ; CS=1
191 bra ext_flash_wait_write ; And return... 190 bra ext_flash_wait_write ; And return...
192 ; 191
193 ; 192 global ext_flash_byte_write_comms ; without wait, ~86us fixed delay due to 115200 Bauds
194 ; return 193 ext_flash_byte_write_comms:
194 movwf temp1 ; store data byte
195 bsf flash_ncs ; CS=1
196 movlw 0x06 ; WREN command
197 rcall write_spi
198 bsf flash_ncs ; CS=1
199 movlw 0x02 ; Write (PP, Page-Program) command
200 rcall write_spi
201 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI
202 movf temp1,W ; load data byte
203 rcall write_spi ; write one byte of data!
204 bsf flash_ncs ; CS=1
205 return
195 206
196 global ext_flash_disable_protection ; Disable write protection 207 global ext_flash_disable_protection ; Disable write protection
197 ext_flash_disable_protection: 208 ext_flash_disable_protection:
198 ; unlock old memory 209 ; unlock old memory
199 bsf flash_ncs ; CS=1 210 bsf flash_ncs ; CS=1
206 movlw b'00000000' ; New status 217 movlw b'00000000' ; New status
207 rcall write_spi 218 rcall write_spi
208 bsf flash_ncs ; CS=1 219 bsf flash_ncs ; CS=1
209 220
210 ; unlock new memory 221 ; unlock new memory
211 ; bsf flash_ncs ; CS=1 222 movlw 0x06 ; WREN command
212 ; movlw 0x06 ; WREN command 223 rcall write_spi
213 ; rcall write_spi 224 bsf flash_ncs ; CS=1
214 ; bsf flash_ncs ; CS=1 225 movlw 0x98 ; ULBPR command
215 ; movlw 0x98 ; ULBPR command 226 rcall write_spi
216 ; rcall write_spi 227 bsf flash_ncs ; CS=1
217 ; bsf flash_ncs ; CS=1 228
218
219 ;bsf flash_ncs ; CS=1
220 movlw 0x06 ; WREN command 229 movlw 0x06 ; WREN command
221 rcall write_spi 230 rcall write_spi
222 bsf flash_ncs ; CS=1 231 bsf flash_ncs ; CS=1
223 movlw 0x42 ; WBPR command 232 movlw 0x42 ; WBPR command
224 rcall write_spi 233 rcall write_spi
225 movlw .18 234 movlw .18
226 movwf temp1 235 movwf temp2
227 ext_flash_disable_protection2: 236 ext_flash_disable_protection2:
228 movlw 0x00 237 movlw 0x00
229 rcall write_spi 238 rcall write_spi
230 decfsz temp1,F ; 18 bytes with 0x00 239 decfsz temp2,F ; 18 bytes with 0x00
231 bra ext_flash_disable_protection2 240 bra ext_flash_disable_protection2
232 bsf flash_ncs ; CS=1 241 bsf flash_ncs ; CS=1
233 return 242 return
234 243
235 global ext_flash_enable_protection 244 global ext_flash_enable_protection
242 251
243 movlw 0x01 ; WRSR command 252 movlw 0x01 ; WRSR command
244 rcall write_spi 253 rcall write_spi
245 movlw b'00011100' ; New status (Write protect on) 254 movlw b'00011100' ; New status (Write protect on)
246 rcall write_spi 255 rcall write_spi
256 bsf flash_ncs ; CS=1
257
258 ; lock new memory
259 ; movlw 0x06 ; WREN command
260 ; rcall write_spi
247 ; bsf flash_ncs ; CS=1 261 ; bsf flash_ncs ; CS=1
248 262 ; movlw 0x8D ; LBPR command
249 ; lock new memory 263 ; rcall write_spi
250 bsf flash_ncs ; CS=1 264 ; bsf flash_ncs ; CS=1
251 movlw 0x06 ; WREN command 265 movlw 0x06 ; WREN command
252 rcall write_spi 266 rcall write_spi
253 bsf flash_ncs ; CS=1 267 bsf flash_ncs ; CS=1
254 movlw 0x42 ; WBPR command 268 movlw 0x42 ; WBPR command
255 rcall write_spi 269 rcall write_spi
256 movlw .18 270 movlw .18
257 movwf temp1 271 movwf temp2
258 ext_flash_enable_protection2: 272 ext_flash_enable_protection2:
259 movlw 0xFF 273 movlw 0xFF
260 rcall write_spi 274 rcall write_spi
261 decfsz temp1,F ; 18 bytes with 0xFF 275 decfsz temp2,F ; 18 bytes with 0xFF
262 bra ext_flash_enable_protection2 276 bra ext_flash_enable_protection2
263 bsf flash_ncs ; CS=1 277 bsf flash_ncs ; CS=1
264 return 278 return
265 279
266 280
271 rcall write_spi 285 rcall write_spi
272 bsf flash_ncs ; CS=1 286 bsf flash_ncs ; CS=1
273 movlw 0x20 ; Sector erase command 287 movlw 0x20 ; Sector erase command
274 rcall write_spi 288 rcall write_spi
275 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI 289 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI
276 bsf flash_ncs ; CS=1
277 ; bra ext_flash_wait_write ; Wait for write... and return 290 ; bra ext_flash_wait_write ; Wait for write... and return
278 ext_flash_wait_write: 291 ext_flash_wait_write:
279 WAITMS d'1' ; TBE/TSE=25ms... 292 bsf flash_ncs ; CS=1
293 ; WAITMS d'1' ; TBE/TSE=25ms...
280 movlw 0x05 ; RDSR command 294 movlw 0x05 ; RDSR command
281 rcall write_spi ; Read status 295 rcall write_spi ; Read status
282 rcall write_spi ; Read status into WREG 296 rcall write_spi ; Read status into WREG
283 bsf flash_ncs ; CS=1 297 bsf flash_ncs ; CS=1
284 btfsc SSP2BUF,0 ; Write operation in process? 298 btfsc SSP2BUF,0 ; Write operation in process?