inital commit

bcd.h

@@ -10,5 +10,7 @@ void bcd_invert(__idata uint8_t *v1, uint8_t len);
 void bcd_addbyte(__idata uint8_t *v1, uint8_t len, uint8_t b) __reentrant;
 uint8_t bcd_getsig(__idata uint8_t*v, uint8_t len);
 
+void long_tobcd(__idata uint8_t *binval, __idata uint8_t *bcdval, uint8_t binlen, uint8_t bcdlen) __reentrant;
+
 #endif
 

long_add.c

@@ -0,0 +1,33 @@
+#include  "mc8051fun.h"
+#include "bcd.h"
+
+#pragma disable_warning 59  // Disable "must return a value" warning
+
+uint8_t long_add(__idata uint8_t *v1, __idata uint8_t *v2,uint8_t len) __reentrant
+{
+	(void)v1; (void)v2; (void)len;
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	sp,a
+	pop	ar1
+	pop	ar7
+	mov	ar0,dpl
+	clr c
+001$:		
+	mov	a,@r0
+	addc	a,@r1
+	mov	@r0,a
+	inc	r0
+	inc	r1
+	djnz	r7,001$
+	mov	dpl,#0x00
+	jnc	$002
+	inc	dpl
+$002:
+	mov	sp,_bp
+	__endasm;
+}
+
+
+

long_rlc__.c

@@ -0,0 +1,24 @@
+
+/*
+ * @r0 = number
+ * r7 = len
+ *
+ * modyfies: r0,r7,a 
+ */
+static void long_rlc__() __naked
+{
+	__asm
+	.globl long_rlc
+
+long_rlc:
+	mov	a,@r0
+	rlc	a
+	mov	@r0,a
+	inc	r0
+	djnz	r7,long_rlc
+	ret
+
+	__endasm;
+}
+
+

long_rrc__.c

@@ -0,0 +1,29 @@
+
+/*
+ * @r0 = number
+ * r7 = len
+ *
+ * modyfies: r0,r7,a 
+ */
+static void long_rrc__() __naked
+{
+	__asm
+	.globl long_rrc
+long_rrc:
+	push	PSW
+	mov	a,r0
+	add	a,r7
+	mov	r0,a
+	pop	PSW
+001$:
+	dec	r0
+	mov	a,@r0
+	rrc	a
+	mov	@r0,a
+	djnz	r7,001$
+	ret
+
+	__endasm;
+}
+
+

long_tobcd.c

@@ -0,0 +1,33 @@
+
+#include "mc8051fun.h"
+
+/*
+ * C-Wrapper for long_tobcd
+ */
+
+void long_tobcd(__idata uint8_t *binval, __idata uint8_t *bcdval, uint8_t binlen, uint8_t bcdlen) __reentrant
+{
+	(void)binval;
+	(void)bcdval;
+	(void)binlen;
+	(void)bcdlen;
+
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	r0,a
+	mov	a,@r0
+	mov	r1,a
+	dec	r0
+	mov	a,@r0
+	mov	r7,a
+	dec	r0
+	mov	a,@r0
+	mov	r6,a
+	mov	r0,dpl
+	lcall	long_tobcd
+			
+	__endasm;
+}
+
+

long_tobcd__.c

@@ -0,0 +1,92 @@
+
+/*
+r0 = bin
+r1 = bcd
+r7 = len of bin
+r6 = len of bcd
+*/
+
+#include "mc8051fun.h"
+
+#include "usebank0.h"
+
+// double dabble
+
+void long_tobcd__()  __naked
+{
+	__asm
+	.globl long_tobcd
+	
+long_tobcd:
+
+	; fill dst with zeroes
+
+	mov	r3,AR1		; save r1 in r3
+	mov	r4,AR6		; use r4 as counter
+;	mov	a,#0x00
+
+000$:
+	mov	@r1,#0x0 
+	inc	r1
+	djnz	r4,000$
+
+
+
+	mov	a,r0
+	add	a,r7
+	dec	a
+	mov	r0,a		; r0 points to last byte of bin
+	mov	r2,AR0		; save r0 in r2	
+
+006$:	
+	mov 	a,@r0
+	mov	r5,#0x08
+005$:
+	mov	r4,AR6		; use r4 as counter
+	mov	r1,AR3
+
+	push 	ACC
+004$:
+	mov	a,@r1
+	acall	003$
+	acall	003$
+	mov	@r1,a
+	inc	r1
+	djnz	r4,004$
+
+	pop	ACC
+
+
+	rlc	a
+	push 	ACC
+	push	AR0
+	push	AR7
+	mov	r7,AR6
+	mov	r0,AR3
+	lcall	long_rlc
+	pop 	AR7
+	pop	AR0
+	pop	ACC
+	djnz	r5,005$
+
+
+	dec	r0
+	djnz	r7,006$
+	ret
+	
+
+003$:
+	swap	a
+	clr	c
+	subb	a,#0x50
+	jc	002$
+	add	a,#0x30
+002$:
+	add	a,#0x50
+	ret
+	
+__endasm;
+}
+
+
+

usebank0.h

@@ -0,0 +1,21 @@
+
+#undef AR0
+#undef AR1
+#undef AR2
+#undef AR3
+#undef AR4
+#undef AR5
+#undef AR6
+#undef AR7
+
+
+#define AR0 0x00
+#define AR1 0x01
+#define AR2 0x02
+#define AR3 0x03
+#define AR4 0x04
+#define AR5 0x05
+#define AR6 0x06
+#define AR7 0x07
+
+