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<h1> words/istore.asm </h1> |
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<p> |
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<a href="../WordList.en.html">Jump to Vocabulary</a> |
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<pre> |
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; ( n addr -- ) Memory |
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; R( -- ) |
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; writes a cell in flash |
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VE_ISTORE: |
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.db $02, "i!",0 |
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.dw VE_HEAD |
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.set VE_HEAD = VE_ISTORE |
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XT_ISTORE: |
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.dw DO_COLON |
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PFA_ISTORE: |
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.dw XT_INTOFF |
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.dw XT_TO_R |
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.dw XT_OVER |
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.dw XT_OVER |
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.dw XT_SPMBUF |
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.dw XT_DUP |
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.dw XT_SPMPAGELOAD |
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; an erase cycle is only necessary |
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; when changing a bit from 0 to 1 |
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.dw XT_OVER |
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.dw XT_OVER |
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.dw XT_IFETCH |
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.dw XT_INVERT |
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.dw XT_AND |
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.dw XT_DOCONDBRANCH |
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.dw PFA_ISTORE_WRITE |
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.dw XT_DUP |
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.dw XT_SPMERASE |
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PFA_ISTORE_WRITE: |
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.dw XT_DUP |
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.dw XT_SPMWRITE |
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.dw XT_SPMRWW |
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.dw XT_DROP |
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.dw XT_DROP |
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.dw XT_R_FROM |
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.dw XT_INTRESTORE |
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.dw XT_EXIT |
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; ( addr -- ) |
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; R( -- ) |
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; load the flash page of cell addr into write buffer, omitting addr itself |
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;VE_SPMPAGELOAD: |
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; .db 11, "spmpageload" |
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; .dw VE_HEAD |
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; .set VE_HEAD = VE_INTSPMPAGELOAD |
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XT_SPMPAGELOAD: |
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.dw DO_COLON |
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PFA_SPMPAGELOAD: |
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.dw XT_DUP |
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.dw XT_TO_R |
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.dw XT_DOLITERAL |
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.dw PAGEMASK |
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.dw XT_AND |
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.dw XT_DOLITERAL |
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.dw PAGESIZE |
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.dw XT_SWAP |
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PFA_SPMPAGELOAD1: |
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.dw XT_OVER |
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.dw XT_GREATERZERO |
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.dw XT_DOCONDBRANCH |
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.dw PFA_SPMPAGELOADDONE |
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.dw XT_R_FROM |
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.dw XT_DUP |
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.dw XT_TO_R |
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.dw XT_OVER |
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.dw XT_NOTEQUAL |
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.dw XT_DOCONDBRANCH |
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.dw PFA_SPMPAGELOAD3 |
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.dw XT_DUP |
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.dw XT_IFETCH |
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.dw XT_OVER |
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.dw XT_SPMBUF |
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PFA_SPMPAGELOAD3: ;( size addr -- ) |
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.dw XT_1PLUS |
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.dw XT_SWAP |
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.dw XT_1MINUS |
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.dw XT_SWAP |
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.dw XT_DOBRANCH |
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.dw PFA_SPMPAGELOAD1 |
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PFA_SPMPAGELOADDONE: |
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.dw XT_DROP |
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.dw XT_DROP |
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.dw XT_R_FROM |
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.dw XT_DROP |
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.dw XT_EXIT |
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; ( spmcsr x addr -- ) |
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; R( -- ) |
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; execute spm instruction |
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;VE_DOSPM: |
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; .db $03, "(spm)" |
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; .dw VE_HEAD |
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; .set VE_HEAD = VE_DOSPM |
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XT_DOSPM: |
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.dw PFA_DOSPM |
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PFA_DOSPM: |
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; wait for pending spm instruction |
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PFA_DOSPM1: |
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in temp1, SPMCR |
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andi temp1, (1<<SPMEN) |
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brne PFA_DOSPM1 |
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PFA_DOSPM2: |
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sbic EECR, EEWE |
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rjmp PFA_DOSPM2 |
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; address |
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movw zl, tosl |
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lsl zl |
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rol zh |
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; value |
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ld r0, Y+ |
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ld r1, Y+ |
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; command |
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ld temp0, Y+ |
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ld temp1, Y+ |
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; spm timed sequence |
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out SPMCR, temp0 |
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spm |
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loadtos |
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rjmp DO_NEXT |
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; ( x addr -- ) |
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; R( -- ) |
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; execute spm buf instruction |
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;VE_SPMBUF: |
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; .db $06, "spmbuf",0 |
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; .dw VE_HEAD |
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; .set VE_HEAD = VE_SPMBUF |
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XT_SPMBUF: |
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.dw DO_COLON |
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PFA_SPMBUF: |
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.dw XT_TO_R |
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.dw XT_TO_R |
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.dw XT_DOLITERAL |
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.dw (1<<SPMEN) |
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.dw XT_R_FROM |
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.dw XT_R_FROM |
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.dw XT_DOSPM |
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.dw XT_EXIT |
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; ( addr -- ) |
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; R( -- ) |
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; execute spm erase instruction |
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;VE_SPMERASE: |
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; .db $08, "spmerase",0 |
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; .dw VE_HEAD |
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; .set VE_HEAD = VE_SPMERASE |
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XT_SPMERASE: |
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.dw DO_COLON |
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PFA_SPMERASE: |
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.dw XT_DOLITERAL |
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.dw PAGEMASK |
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.dw XT_AND |
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.dw XT_TO_R |
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.dw XT_DOLITERAL |
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.dw (1<<PGERS|1<<SPMEN) |
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.dw XT_ZERO |
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.dw XT_R_FROM |
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.dw XT_DOSPM |
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.dw XT_EXIT |
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; ( spmcsr x addr -- ) |
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; R( -- ) |
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; execute spm write instruction |
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;VE_SPMWRITE: |
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; .db $08, "spmwrite",0 |
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; .dw VE_HEAD |
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; .set VE_HEAD = VE_WPMWRITE |
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XT_SPMWRITE: |
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.dw DO_COLON |
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PFA_SPMWRITE: |
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.dw XT_DOLITERAL |
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.dw PAGEMASK |
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.dw XT_AND |
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.dw XT_TO_R |
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.dw XT_DOLITERAL |
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.dw (1<<PGWRT|1<<SPMEN) |
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.dw XT_ZERO |
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.dw XT_R_FROM |
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.dw XT_DOSPM |
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.dw XT_EXIT |
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; ( -- ) |
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; R( -- ) |
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; re-enables rww section execute spm rww instruction |
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;VE_SPMRWW: |
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; .db $05, "spmrww" |
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; .dw VE_HEAD |
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; .set VE_HEAD = VE_SPMRWW |
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XT_SPMRWW: |
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.dw DO_COLON |
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PFA_SPMRWW: |
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.dw XT_DOLITERAL |
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.dw (1<<RWWSRE|1<<SPMEN) |
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.dw XT_ZERO |
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.dw XT_ZERO |
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.dw XT_DOSPM |
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.dw XT_EXIT |
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</pre> |
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