2016-08-27 17:40:50 +02:00
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;---------------------------------------------------------------------------;
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; Extended itoa, puts, printf and atoi (C)ChaN, 2011
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;---------------------------------------------------------------------------;
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// Base size is 152 bytes
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#define CR_CRLF 0 // Convert \n to \r\n (+10 bytes)
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#define USE_XPRINTF 1 // Enable xprintf function (+194 bytes)
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#define USE_XSPRINTF 0 // Add xsprintf function (+78 bytes)
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#define USE_XFPRINTF 0 // Add xfprintf function (+54 bytes)
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#define USE_XATOI 0 // Enable xatoi function (+182 bytes)
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#if FLASHEND > 0x1FFFF
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#error xitoa module does not support 256K devices
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#endif
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.nolist
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#include <avr/io.h> // Include device specific definitions.
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.list
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#ifdef SPM_PAGESIZE // Recent devices have "lpm Rd,Z+" and "movw".
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.macro _LPMI reg
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lpm \reg, Z+
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.endm
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.macro _MOVW dh,dl, sh,sl
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movw \dl, \sl
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.endm
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#else // Earlier devices do not have "lpm Rd,Z+" nor "movw".
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.macro _LPMI reg
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lpm
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mov \reg, r0
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adiw ZL, 1
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.endm
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.macro _MOVW dh,dl, sh,sl
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mov \dl, \sl
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mov \dh, \sh
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.endm
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#endif
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;---------------------------------------------------------------------------
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; Stub function to forward to user output function
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;
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;Prototype: void xputc (char chr // a character to be output
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; );
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;Size: 12/12 words
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.section .bss
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.global xfunc_out ; xfunc_out must be initialized before using this module.
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xfunc_out: .ds.w 1
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.section .text
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.func xputc
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.global xputc
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xputc:
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#if CR_CRLF
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cpi r24, 10 ;LF --> CRLF
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brne 1f ;
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ldi r24, 13 ;
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rcall 1f ;
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ldi r24, 10 ;/
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1:
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#endif
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push ZH
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push ZL
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lds ZL, xfunc_out+0 ;Pointer to the registered output function.
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lds ZH, xfunc_out+1 ;/
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sbiw ZL, 0 ;Skip if null
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breq 2f ;/
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icall
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2: pop ZL
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pop ZH
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ret
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.endfunc
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;---------------------------------------------------------------------------
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; Direct ROM string output
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;
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;Prototype: void xputs (const char *str_p // rom string to be output
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; );
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.func xputs
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.global xputs
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xputs:
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_MOVW ZH,ZL, r25,r24 ; Z = pointer to rom string
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1: _LPMI r24
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cpi r24, 0
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breq 2f
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rcall xputc
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rjmp 1b
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2: ret
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.endfunc
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;---------------------------------------------------------------------------
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; Extended direct numeral string output (32bit version)
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;
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;Prototype: void xitoa (long value, // value to be output
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; char radix, // radix
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; char width); // minimum width
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;
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.func xitoa
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.global xitoa
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xitoa:
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;r25:r22 = value, r20 = base, r18 = digits
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clr r31 ;r31 = stack level
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ldi r30, ' ' ;r30 = sign
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ldi r19, ' ' ;r19 = filler
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sbrs r20, 7 ;When base indicates signd format and the value
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rjmp 0f ;is minus, add a '-'.
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neg r20 ;
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sbrs r25, 7 ;
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rjmp 0f ;
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ldi r30, '-' ;
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com r22 ;
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com r23 ;
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com r24 ;
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com r25 ;
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adc r22, r1 ;
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adc r23, r1 ;
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adc r24, r1 ;
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adc r25, r1 ;/
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0: sbrs r18, 7 ;When digits indicates zero filled,
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rjmp 1f ;filler is '0'.
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neg r18 ;
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ldi r19, '0' ;/
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;----- string conversion loop
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1: ldi r21, 32 ;r26 = r25:r22 % r20
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clr r26 ;r25:r22 /= r20
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2: lsl r22 ;
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rol r23 ;
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rol r24 ;
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rol r25 ;
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rol r26 ;
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cp r26, r20 ;
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brcs 3f ;
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sub r26, r20 ;
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inc r22 ;
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3: dec r21 ;
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brne 2b ;/
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cpi r26, 10 ;r26 is a numeral digit '0'-'F'
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brcs 4f ;
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subi r26, -7 ;
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4: subi r26, -'0' ;/
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push r26 ;Stack it
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inc r31 ;/
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cp r22, r1 ;Repeat until r25:r22 gets zero
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cpc r23, r1 ;
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cpc r24, r1 ;
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cpc r25, r1 ;
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brne 1b ;/
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cpi r30, '-' ;Minus sign if needed
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brne 5f ;
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push r30 ;
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inc r31 ;/
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5: cp r31, r18 ;Filler
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brcc 6f ;
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push r19 ;
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inc r31 ;
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rjmp 5b ;/
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6: pop r24 ;Flush stacked digits and exit
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rcall xputc ;
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dec r31 ;
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brne 6b ;/
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ret
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.endfunc
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;---------------------------------------------------------------------------;
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; Formatted string output (16/32bit version)
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;
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;Prototype:
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; void __xprintf (const char *format_p, ...);
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; void __xsprintf(char*, const char *format_p, ...);
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; void __xfprintf(void(*func)(char), const char *format_p, ...);
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;
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#if USE_XPRINTF
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.func xvprintf
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xvprintf:
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ld ZL, Y+ ;Z = pointer to format string
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ld ZH, Y+ ;/
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0: _LPMI r24 ;Get a format char
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cpi r24, 0 ;End of format string?
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breq 90f ;/
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cpi r24, '%' ;Is format?
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breq 20f ;/
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1: rcall xputc ;Put a normal character
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rjmp 0b ;/
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90: ret
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20: ldi r18, 0 ;r18: digits
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clt ;T: filler
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_LPMI r21 ;Get flags
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cpi r21, '%' ;Is a %?
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breq 1b ;/
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cpi r21, '0' ;Zero filled?
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brne 23f ;
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set ;/
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22: _LPMI r21 ;Get width
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23: cpi r21, '9'+1 ;
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brcc 24f ;
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subi r21, '0' ;
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brcs 90b ;
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lsl r18 ;
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mov r0, r18 ;
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lsl r18 ;
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lsl r18 ;
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add r18, r0 ;
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add r18, r21 ;
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rjmp 22b ;/
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24: brtc 25f ;get value (low word)
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neg r18 ;
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25: ld r24, Y+ ;
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ld r25, Y+ ;/
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cpi r21, 'c' ;Is type character?
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breq 1b ;/
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cpi r21, 's' ;Is type RAM string?
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breq 50f ;/
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cpi r21, 'S' ;Is type ROM string?
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breq 60f ;/
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_MOVW r23,r22,r25,r24 ;r25:r22 = value
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clr r24 ;
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clr r25 ;
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clt ;/
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cpi r21, 'l' ;Is long int?
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brne 26f ;
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ld r24, Y+ ;get value (high word)
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ld r25, Y+ ;
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set ;
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_LPMI r21 ;/
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26: cpi r21, 'd' ;Is type signed decimal?
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brne 27f ;/
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ldi r20, -10 ;
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brts 40f ;
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sbrs r23, 7 ;
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rjmp 40f ;
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ldi r24, -1 ;
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ldi r25, -1 ;
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rjmp 40f ;/
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27: cpi r21, 'u' ;Is type unsigned decimal?
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ldi r20, 10 ;
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breq 40f ;/
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cpi r21, 'X' ;Is type hexdecimal?
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ldi r20, 16 ;
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breq 40f ;/
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cpi r21, 'b' ;Is type binary?
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ldi r20, 2 ;
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breq 40f ;/
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ret ;abort
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40: push ZH ;Output the value
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push ZL ;
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rcall xitoa ;
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42: pop ZL ;
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pop ZH ;
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rjmp 0b ;/
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50: push ZH ;Put a string on the RAM
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push ZL
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_MOVW ZH,ZL, r25,r24
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51: ld r24, Z+
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cpi r24, 0
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breq 42b
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rcall xputc
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rjmp 51b
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60: push ZH ;Put a string on the ROM
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push ZL
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rcall xputs
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rjmp 42b
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.endfunc
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.func __xprintf
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.global __xprintf
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__xprintf:
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push YH
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push YL
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in YL, _SFR_IO_ADDR(SPL)
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#ifdef SPH
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in YH, _SFR_IO_ADDR(SPH)
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#else
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clr YH
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#endif
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adiw YL, 5 ;Y = pointer to arguments
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rcall xvprintf
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pop YL
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pop YH
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ret
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.endfunc
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#if USE_XSPRINTF
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.func __xsprintf
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putram:
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_MOVW ZH,ZL, r15,r14
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st Z+, r24
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_MOVW r15,r14, ZH,ZL
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ret
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.global __xsprintf
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__xsprintf:
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push YH
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push YL
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in YL, _SFR_IO_ADDR(SPL)
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#ifdef SPH
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in YH, _SFR_IO_ADDR(SPH)
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#else
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clr YH
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#endif
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adiw YL, 5 ;Y = pointer to arguments
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lds ZL, xfunc_out+0 ;Save registered output function
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lds ZH, xfunc_out+1 ;
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push ZL ;
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push ZH ;/
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ldi ZL, lo8(pm(putram));Set local output function
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ldi ZH, hi8(pm(putram));
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sts xfunc_out+0, ZL ;
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sts xfunc_out+1, ZH ;/
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push r15 ;Initialize pointer to string buffer
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push r14 ;
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ld r14, Y+ ;
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ld r15, Y+ ;/
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rcall xvprintf
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_MOVW ZH,ZL, r15,r14 ;Terminate string
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st Z, r1 ;
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pop r14 ;
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pop r15 ;/
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pop ZH ;Restore registered output function
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pop ZL ;
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sts xfunc_out+0, ZL ;
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sts xfunc_out+1, ZH ;/
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pop YL
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pop YH
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ret
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.endfunc
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#endif
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#if USE_XFPRINTF
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|
|
.func __xfprintf
|
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|
.global __xfprintf
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|
__xfprintf:
|
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|
|
|
push YH
|
|
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|
|
push YL
|
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|
in YL, _SFR_IO_ADDR(SPL)
|
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|
|
#ifdef SPH
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|
|
|
|
in YH, _SFR_IO_ADDR(SPH)
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|
#else
|
|
|
|
|
clr YH
|
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|
|
#endif
|
|
|
|
|
adiw YL, 5 ;Y = pointer to arguments
|
|
|
|
|
lds ZL, xfunc_out+0 ;Save registered output function
|
|
|
|
|
lds ZH, xfunc_out+1 ;
|
|
|
|
|
push ZL ;
|
|
|
|
|
push ZH ;/
|
|
|
|
|
ld ZL, Y+ ;Set output function
|
|
|
|
|
ld ZH, Y+ ;
|
|
|
|
|
sts xfunc_out+0, ZL ;
|
|
|
|
|
sts xfunc_out+1, ZH ;/
|
|
|
|
|
rcall xvprintf
|
|
|
|
|
pop ZH ;Restore registered output function
|
|
|
|
|
pop ZL ;
|
|
|
|
|
sts xfunc_out+0, ZL ;
|
|
|
|
|
sts xfunc_out+1, ZH ;/
|
|
|
|
|
pop YL
|
|
|
|
|
pop YH
|
|
|
|
|
ret
|
|
|
|
|
.endfunc
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
;---------------------------------------------------------------------------
|
|
|
|
|
; Extended numeral string input
|
|
|
|
|
;
|
|
|
|
|
;Prototype:
|
|
|
|
|
; char xatoi ( /* 1: Successful, 0: Failed */
|
|
|
|
|
; const char **str, /* pointer to pointer to source string */
|
|
|
|
|
; long *res /* result */
|
|
|
|
|
; );
|
|
|
|
|
;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#if USE_XATOI
|
|
|
|
|
.func xatoi
|
|
|
|
|
.global xatoi
|
|
|
|
|
xatoi:
|
|
|
|
|
_MOVW r1, r0, r23, r22
|
|
|
|
|
_MOVW XH, XL, r25, r24
|
|
|
|
|
ld ZL, X+
|
|
|
|
|
ld ZH, X+
|
|
|
|
|
clr r18 ;r21:r18 = 0;
|
|
|
|
|
clr r19 ;
|
|
|
|
|
clr r20 ;
|
|
|
|
|
clr r21 ;/
|
|
|
|
|
clt ;T = 0;
|
|
|
|
|
|
|
|
|
|
ldi r25, 10 ;r25 = 10;
|
|
|
|
|
rjmp 41f ;/
|
|
|
|
|
40: adiw ZL, 1 ;Z++;
|
|
|
|
|
41: ld r22, Z ;r22 = *Z;
|
|
|
|
|
cpi r22, ' ' ;if(r22 == ' ') continue
|
|
|
|
|
breq 40b ;/
|
|
|
|
|
brcs 70f ;if(r22 < ' ') error;
|
|
|
|
|
cpi r22, '-' ;if(r22 == '-') {
|
|
|
|
|
brne 42f ; T = 1;
|
|
|
|
|
set ; continue;
|
|
|
|
|
rjmp 40b ;}
|
|
|
|
|
42: cpi r22, '9'+1 ;if(r22 > '9') error;
|
|
|
|
|
brcc 70f ;/
|
|
|
|
|
cpi r22, '0' ;if(r22 < '0') error;
|
|
|
|
|
brcs 70f ;/
|
|
|
|
|
brne 51f ;if(r22 > '0') cv_start;
|
|
|
|
|
ldi r25, 8 ;r25 = 8;
|
|
|
|
|
adiw ZL, 1 ;r22 = *(++Z);
|
|
|
|
|
ld r22, Z ;/
|
|
|
|
|
cpi r22, ' '+1 ;if(r22 <= ' ') exit;
|
|
|
|
|
brcs 80f ;/
|
|
|
|
|
cpi r22, 'b' ;if(r22 == 'b') {
|
|
|
|
|
brne 43f ; r25 = 2;
|
|
|
|
|
ldi r25, 2 ; cv_start;
|
|
|
|
|
rjmp 50f ;}
|
|
|
|
|
43: cpi r22, 'x' ;if(r22 != 'x') error;
|
|
|
|
|
brne 51f ;/
|
|
|
|
|
ldi r25, 16 ;r25 = 16;
|
|
|
|
|
|
|
|
|
|
50: adiw ZL, 1 ;Z++;
|
|
|
|
|
ld r22, Z ;r22 = *Z;
|
|
|
|
|
51: cpi r22, ' '+1 ;if(r22 <= ' ') break;
|
|
|
|
|
brcs 80f ;/
|
|
|
|
|
cpi r22, 'a' ;if(r22 >= 'a') r22 =- 0x20;
|
|
|
|
|
brcs 52f ;
|
|
|
|
|
subi r22, 0x20 ;/
|
|
|
|
|
52: subi r22, '0' ;if((r22 -= '0') < 0) error;
|
|
|
|
|
brcs 70f ;/
|
|
|
|
|
cpi r22, 10 ;if(r22 >= 10) {
|
|
|
|
|
brcs 53f ; r22 -= 7;
|
2020-12-27 18:36:32 +01:00
|
|
|
subi r22, 7 ; if(r22 < 10)
|
2016-08-27 17:40:50 +02:00
|
|
|
cpi r22, 10 ;
|
|
|
|
|
brcs 70f ;}
|
|
|
|
|
53: cp r22, r25 ;if(r22 >= r25) error;
|
|
|
|
|
brcc 70f ;/
|
|
|
|
|
60: ldi r24, 33 ;r21:r18 *= r25;
|
|
|
|
|
sub r23, r23 ;
|
|
|
|
|
61: brcc 62f ;
|
|
|
|
|
add r23, r25 ;
|
|
|
|
|
62: lsr r23 ;
|
|
|
|
|
ror r21 ;
|
|
|
|
|
ror r20 ;
|
|
|
|
|
ror r19 ;
|
|
|
|
|
ror r18 ;
|
|
|
|
|
dec r24 ;
|
|
|
|
|
brne 61b ;/
|
|
|
|
|
add r18, r22 ;r21:r18 += r22;
|
|
|
|
|
adc r19, r24 ;
|
|
|
|
|
adc r20, r24 ;
|
|
|
|
|
adc r21, r24 ;/
|
|
|
|
|
rjmp 50b ;repeat
|
|
|
|
|
|
|
|
|
|
70: ldi r24, 0
|
|
|
|
|
rjmp 81f
|
|
|
|
|
80: ldi r24, 1
|
|
|
|
|
81: brtc 82f
|
|
|
|
|
clr r22
|
|
|
|
|
com r18
|
|
|
|
|
com r19
|
|
|
|
|
com r20
|
|
|
|
|
com r21
|
|
|
|
|
adc r18, r22
|
|
|
|
|
adc r19, r22
|
|
|
|
|
adc r20, r22
|
|
|
|
|
adc r21, r22
|
|
|
|
|
82: st -X, ZH
|
|
|
|
|
st -X, ZL
|
|
|
|
|
_MOVW XH, XL, r1, r0
|
|
|
|
|
st X+, r18
|
|
|
|
|
st X+, r19
|
|
|
|
|
st X+, r20
|
|
|
|
|
st X+, r21
|
|
|
|
|
clr r1
|
|
|
|
|
ret
|
|
|
|
|
.endfunc
|
|
|
|
|
#endif
|
