| 0,0 → 1,108 |
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| <h1> words/1ms.asm </h1> |
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| <pre> |
| ; ( -- ) Time |
| ; R(--) |
| ; busy waits (almost) exactly 1 millisecond |
| VE_1MS: |
| .db $03, "1ms" |
| .dw VE_HEAD |
| .set VE_HEAD = VE_1MS |
| XT_1MS: |
| .dw PFA_1MS |
| ; error: the additional instructions need appr. |
| ; 4 cpu cycles, Z should be decreased by 1 or 2 |
| PFA_1MS: |
| .set delay_cycles = cpu_frequency / 1000 |
| ldi zl, LOW( delay_cycles / 4 ) |
| ldi zh, HIGH(delay_cycles / 4 ) |
| sbiw zl, 42 ; internal plus forth kernel overhead |
| PFA_1MS1: |
| sbiw zl, 1 |
| brne PFA_1MS1 |
| rjmp DO_NEXT |
| |
| ; : ms 0 do 1ms loop ; |
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