clrreg.inc

来自「使用pic16f873晶片來設定adi的RGB轉HDMI的功能chip。最主要是」· INC 代码 · 共 18 行

;******************************************************************************
;*                           CLEAR BANK0 REGISTERS                            *
;******************************************************************************
REG_CLEAR
	      	BSF     FSR,BIT_5       ;Clear 2 bank registers from 20H to 7FH	       
R_CLR0
			CLRF    INDEX           ;Clear register
			INCF    FSR             ;Change to next register
			MOVF    FSR,W
			BTFSC   STATUS,ZF       ;If fsr = 0 then finish clear 2 bank registers
			RETLW	0

			BTFSS   FSR,BIT_7       ;If bit7 = 1 then clear 2nd bank registers
			GOTO    R_CLR0          ;Go to clear next register
			GOTO    REG_CLEAR       ;Go to clear next bank registers

			RETURN