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avr: moved COM and COMPROTO defs and routines into dedicated files.

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This commit is contained in:
Martin Preuss
2023-04-16 23:23:06 +02:00
parent d53b061aed
commit 5f4260d605
15 changed files with 1332 additions and 1001 deletions
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40
avr/utils.asm
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@@ -14,45 +14,7 @@
; ***************************************************************************
; macros
; ---------------------------------------------------------------------------
; Utils_WaitNanoSecs waittime_in_ns , cyles_already_used , waitcount_register
;
; cycles already used will be subtracted from the delay
; the waittime resolution is 1 cycle (delay from exact to +1 cycle)
; the maximum delay at 20MHz (50ns/clock) is 38350ns
; waitcount register must specify an immediate register
; taken from https://www.mikrocontroller.net/articles/AVR_Assembler_Makros#Verz%C3%B6gerung_um_X_Nanosekunden
;
.set Osc_Hz = clock ; 1 MHz
.set cycle_time_ns = (1000000000 / Osc_Hz) ; clock duration
.macro Utils_WaitNanoSecs
.set cycles = ((@0 + cycle_time_ns - 1) / cycle_time_ns - @1)
.if (cycles > (255 * 3 + 2))
.error "MACRO Utils_WaitNanoSecs - too many cycles to burn"
.else
.if (cycles > 6)
.set loop_cycles = (cycles / 3)
ldi @2,loop_cycles
dec @2
brne pc-1
.set cycles = (cycles - (loop_cycles * 3))
.endif
.if (cycles > 0)
.if (cycles & 4)
rjmp pc+1
rjmp pc+1
.endif
.if (cycles & 2)
rjmp pc+1
.endif
.if (cycles & 1)
nop
.endif
.endif
.endif
.endmacro
.include "utils_wait.asm"