frac2bcd.asm

2022/01/19

converts a fractional number to BCD. This code is a part of pAVRlib.

Subroutine

`unsigned int FRAC2BCD(unsigned char frac)` (in: r24, out: r25:r24)

converts a fractional number (0.8) to BCD. In r25 the result (BCD) will be stored. r24 will be the remainder and you can obtain more digits by calling this function repeatedly.

Example

	ldi	r24, 0xd0	; 0.11010000(b) = 0.8125(d)
	rcall	FRAC2BCD	; result: r25 = 0x81
				;	  r24 = 0x40 (= 0b0100 0000)
	mov	r17, r25	; store r25 in r17
	rcall	FRAC2BCD	; result: r25 = 0x25
				;	  r24 = 0x00 (= 0b0000 0000)
	mov	r16, r25	; now r17:r16 = 0x81:0x25

frac2bcd.asm

Subroutine

unsigned int FRAC2BCD(unsigned char frac) (in: r24, out: r25:r24)

Example

`unsigned int FRAC2BCD(unsigned char frac)` (in: r24, out: r25:r24)