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