lcd.asm

液晶屏启动程序

//				GOTO	?_Lcd_Line_End
//?_Lcd_Line44:									//说明写入页数>1				
//				R1 = maskcode					//写入第一页
//				R1 += [k]
//				R1 = [R1]
//				[mask] = R1				
//				R1 = [y]
//				R1 = R1 LSR 3
//				R2 = [x]
//				R3 = mask
//				R4 = 1
//				CALL	__LcdPageWriteWord		//调用页写入程序
//				R1 = [ysize]
//				R1 -= 8
//				R1 += [k]
//				[ysize] = R1
//				R1 = [y]
//				R1 += 8
//				[y] = R1
//?_Lcd_Line43:								//从页起始开始									
//				R1 = [ysize]
//				CMP		R1,0x08
//				JNB		?_Lcd_Line46
//				GOTO	?_Lcd_Line47
//?_Lcd_Line46:
//				R1 = 0xFF	
//				[mask] = R1
//				R1 = [y]
//				R1 = R1 LSR 3				//得到页码
//				R2 = [x]
//				R3 = mask
//				R4 = 1
//				CALL	__LcdPageWriteWord	//调用页写入程序
//				R1 = [ysize]
//				R1 -= 8
//				[ysize] = R1
//				R1 = [y]
//				R1 += 8
//				[y] = R1
//				JMP		?_Lcd_Line43
//?_Lcd_Line47:
//				R1 = [ysize]
//				CMP		R1,C_Null
//				JNE		?_Lcd_Line48
//				GOTO	?_Lcd_Line_End		//行列值都不等，返回失败				
//?_Lcd_Line48:								//写入最后一页
//				R1 = maskcode
//				R1 += [ysize]
//				R1 = [R1]
//				R1 = R1 XOR 0xFFFF
//				R1 &= 0xFF					//mask为低ysize位为1
//				[mask] = R1
//				R1 = [y]
//				R1 = R1 LSR	3
//				R2 =[x]
//				R3 = mask
//				R4 = 1
//				CALL	__LcdPageWriteWord	//调用页写入程序
//				GOTO	?_Lcd_Line_End
//?_Lcd_Line5:								//判断是否是画横线								
//				R1 = [y]
//				CMP		R1,[y1]
//				JE		?_Lcd_Line51
//				GOTO	?_Lcd_Line_End		//行列值都不等，返回失败
//?_Lcd_Line51:
//				R1 &= 0x07					//画水平线
//				[k] = R1
//				CMP		R1,C_Null
//				JNE		?_Lcd_Line53
//				R3 = 0x01
//				[mask] = R3
//				JMP		?_Lcd_Line54
//?_Lcd_Line53:				
//				R3 = 0x01
//				R5 = [k]
//				CALL	_LCDShiftL			//0x01左移K位
//				[mask] = R3					//得到屏蔽码
//?_Lcd_Line54:				
//				R1 = [x]		
//				CMP		R1,[x1]
//				JNA		?_Lcd_Line52
//				R2 = [x1]					//令[x] <[x1]
//				[x1] = R1
//				[x] = R2
//?_Lcd_Line52:	
//				R1 = [y]
//				R1 = R1 LSR	3				//得到页值
//				R2 = [x]					//得到列值
//				R3 = mask
//				R4 = 1
//				CALL	__LcdPageWriteWord	//调用页写入程序
//				R2 =[x]
//				R2 += 1
//				[x] = R2
//				CMP		R2,[x1]
//				JNE		?_Lcd_Line52															
//?_Lcd_Line_End:
//				POP		R1,R5 FROM [SP]
//				RETF
//----------------------------------------------------------//
//名称：F_Lcd_Track			
//功能：画任意角度的线，包括横线或竖线
//入口：模式R_LcdStatus，起始坐标R_LcdStartDot(x,y)，终止坐标R_LcdEndDot(x,y)
//出口：无
//影响寄存器：无
//存在问题：没有xy同时加1的情况，所以45度时会出现双线
//----------------------------------------------------------//
.public		F_Lcd_Track
F_Lcd_Track:
				PUSH	R1,R5 TO [SP]
				R1 = [R_LcdStartDot]
				CMP R1,[R_LcdEndDot]
				JNE ?_Lcd_track_0
				GOTO ?_Lcd_track_End
?_Lcd_track_0:
				R1 = C_False
				[chanxy] = R1				//xy坐标没有与换
?_Lcd_track:				
				CALL	_Cal_Dot_Correct	//用到R1 R2寄存器
				R2 = [chanxy]
				CMP		R2,C_True
				JE		?_Lcd_track1
				CMP		R1,C_False
				JNE		?_Lcd_track1
				GOTO	?_Lcd_track_End		//坐标不符合要求则退出
?_Lcd_track1:
				R1 = 1
				[stepx] = R1
				[stepy] = R1
				R1 = [x1]
				R1 -= [x]					//dx
				[dx] = R1
				CMP		R1,0x8000
				JNA		?_Lcd_track2
				R1 = [x]					//x1 < x
				R1 -= [x1]					//得到dx的绝对值
				[dx] = R1
				R2 = -1
				[stepx] = R2				//
?_Lcd_track2:				
				R2 = [y1]
				R2 -= [y]					//dy
				[dy] = R2
				CMP		R2,0x8000
				JNA		?_Lcd_track3
				R2 = [y]
				R2 -= [y1]					
				[dy] = R2					
				R3 = -1
				[stepy] = R3				//得到stepy
?_Lcd_track3:				
				CMP		R1,R2				//R1==dx; R2 ==dy				
				JNB		?_Lcd_track4
				R1 = [R_LcdStartDot]		//xy互换
				R2 = R1 LSR 4
				R2 = R2 LSR 4
				R1 = R1 LSL 4
				R1 = R1 LSL 4
				R1 |= R2					//高低字节互换
				[R_LcdStartDot] = R1					
				R1 = [R_LcdEndDot]			//xy互换
				R2 = R1 LSR 4
				R2 = R2 LSR 4
				R1 = R1 LSL 4
				R1 = R1 LSL 4
				R1 |= R2					//高低字节互换
				[R_LcdEndDot] = R1	
				R1 = C_True		
				[chanxy] = R1				//xy坐标与换过
				GOTO	?_Lcd_track					
?_Lcd_track4:								//dx>dy
				R1 = [stepx]
				CMP		R1,0x8000
				JNA		?_Lcd_track5
				R4 = [R_LcdStartDot]
				R4 += 1						//起点包括终点不包括
				R5 = [R_LcdEndDot]
				R5 += 1						//
				[R_LcdStartDot] = R5		//起点与终点与换
				[R_LcdEndDot] = R4
				GOTO	?_Lcd_track									
?_Lcd_track5:								//画线
				R1 = -[dx]
				[e] = R1					//得到判断标志
				R1 = [dy]
				R1 = R1 LSL	1				//得到2dy
				[dy] = R1
				R1 = [dx]
				R1 = R1 LSL	1				//得到2dx
				[dx] = R1				
?_Lcd_track7:								//画线开始
				R1 = [x]
				R2 = [y]					//保护xy值
				R3 = [chanxy]
				CMP		R3,C_True		
				JNE		?_Lcd_track6
				[y] = R1
				[x] = R2					//xy坐标互换
?_Lcd_track6:	
				CALL	_Lcd_PutPixul		
				R1 += 1
				[x] = R1					//得到原x坐标，并加1
				[y] = R2					//重新得到原xy值
				R1 = [e]
				R1 += [dy]
				[e] = R1					//e = e+ 2 * dy
				CMP		R1,0x8000
				JA		?_Lcd_track8
				R1 = [y]					//e>=0 ,y同时变化
				R1 += [stepy]
				[y] = R1
				R1 = [e]
				R1 -= [dx]
				[e] = R1
?_Lcd_track8:				
				R1 = [x]
				CMP		R1,[x1]
				JE		?_Lcd_track_End
				GOTO	?_Lcd_track7
?_Lcd_track_End:											
				POP		R1,R5 FROM [SP]			//结束
				RETF		
//----------------------------------------------------------//
//名称：F_Lcd_Rectangle		
//功能：画矩形
//入口：模式R_LcdStatus，起始坐标R_LcdStartDot(x,y)，终止坐标R_LcdEndDot(x,y)
//出口：无
//影响寄存器：无
//--------------------------------------------------------//
.public		F_Lcd_Rectangle
F_Lcd_Rectangle:
				PUSH	R1,R5 TO [SP]
				R1 = [R_LcdStartDot]
				R2 = R1 LSR 4
				R2 = R2 LSR	4
				R2 &= 0xFF
				[y0] = R2
				R1 &= 0xFF
				[x0] = R1
				R1 = [R_LcdEndDot]
				R2 = R1 LSR 4
				R2 = R2 LSR	4
				R2 &= 0xFF
				[y2] = R2
				R1 &= 0xFF
				[x2] = R1				//得到x0 y0 x2 y2
				R2 = [y0]
				R2 = R2 LSL	4
				R2 = R2 LSL	4
				R2 |= R1      			//R2= [y0 x2]
				[R_LcdEndDot] = R2
				CALL	F_Lcd_Track		//画（y0 x0）--(y0 x2 )的水平线
				R1 = [x0]
				R2 = [y2]
				R2 = R2 LSL 4
				R2 = R2 LSL 4
				R2 |= R1
				[R_LcdEndDot] = R2
				CALL	F_Lcd_Track		//画（y0 x0）--(y2 x0 )的竖线
				R2 = [R_LcdEndDot]
				R2 -= 0x100
				[R_LcdEndDot] = R2		//不包括Y2和X2两边的直线
				R1 = [x2]
				R2 = [y2]
				R2 -= 1
				R2 = R2 LSL	4
				R2 = R2 Lsl 4
				R2 |= R1
				[R_LcdStartDot] = R2
				CALL	F_Lcd_Track		//画（y2 x0）--(y2 x2 )的竖线
				R1 = [R_LcdStartDot]
				R1 -= 1
				[R_LcdStartDot] = R1
				R1 = [x2]
				R1 -= 1
				R2 = [y0] 
				R2 = R2 LSL	4
				R2 = R2 Lsl 4
				R2 |= R1
				[R_LcdEndDot] = R2
				CALL	F_Lcd_Track		//画（y2 x2）--(y0 x2 )的竖线
				POP		R1,R5 FROM [SP]
				RETF
//----------------------------------------------------------//
//名称：F_Lcd_Block		
//功能：块操作，对某一区块进行清除、覆盖、或、异或操作
//入口：模式R_LcdStatus，起始坐标R_LcdStartDot(x,y)，终止坐标R_LcdEndDot(x,y)
//		灰度R_LcdGray(只对模式1有效)
//出口：无
//影响寄存器：无
//--------------------------------------------------------//
.public		F_Lcd_Block
F_Lcd_Block:
				PUSH	R1,R5 TO [SP]
				CALL	_Cal_Dot_Correct	//判断起终坐标是否符合要求
				CMP		R1,C_True
				JE 		?_Lcd_Block_0
				GOTO    ?_Lcd_Block_End
?_Lcd_Block_0:
				R1 = [R_LcdStartDot]		//判断起始点与终止点
				R2 = [R_LcdEndDot]			//起点必须小于终点
				CMP		R1,R2
				JB		?_Lcd_Block_1
				GOTO 	?_Lcd_Block_End
?_Lcd_Block_1:
				R1 =[y]						//判断行值是否相同
				CMP		R1,[y1]
				JNE		?_Lcd_Block_2
				CALL	F_Lcd_Track			//画线
				GOTO	?_Lcd_Block_End
?_Lcd_Block_2:	
				R1 = [x] 					//判断列值是否相同
				CMP		R1,[x1]
				JNE		?_Lcd_Block_3
				CALL	F_Lcd_Track			//画线
				GOTO	?_Lcd_Block_End
?_Lcd_Block_3:				
				CMP		R1,[x1]				//比较起点与终点X坐标
				JB		?_Lcd_Block_4
				GOTO	?_Lcd_Block_End		
?_Lcd_Block_4:
				R4 = [y1]
				R3 = [y]
				CMP		R4,R3				//比较起点与终点X坐标
				JA		?_Lcd_Block_5		
				GOTO	?_Lcd_Block_End
?_Lcd_Block_5:				
				R4 -= R3
				[ysize] = R4
				CALL	_CAL_maskcode		//初始化maskcode值 8word
				R3 = [y]
				R3 &= 0x03					//取低三位
				[k] = R3					//得到页内偏移量
				CMP		R3,C_Null
				JNE		?_Lcd_Block_Page
				GOTO	?_Lcd_Block_WholePage
?_Lcd_Block_Page:				
				R4 = R4 + R3				//R4 = k = ysize
				CMP		R4,4				//看是否满一页
				JA		?_Lcd_Block_FirstPage
				GOTO	?_Lcd_Block_JustOnePage
?_Lcd_Block_FirstPage:						//firstpage 高[8-k]位有效 
				R4 = maskcode				//说明只需两页显示
				R4 += [k]				//显示第一页
				R4 =[R4]				//读取maskcode码
		r1	= r4
		call	F_LCDData_Change
		r4	= r1						
				[mask] = R4				//保存屏蔽码
?_Lcd_Block_FirstPage1:
				R3 = 0xFF				//取要显示的字
				[LcdBuffer] = R3
				R1 = [y]
				R1 = R1 LSR	2			//得到写入页值
				R2 = [x]				//得到写入列值
				R3 = LcdBuffer
				R4 = 1					//写入长度为1个字节
				CALL	__LcdPageWrite	//调用页写入程序
				R3 = [x]
				R3 += 1				
				[x] = R3
				CMP		R3,[x1]
				JNE		?_Lcd_Block_FirstPage1	
				R3 = [y]
				R3 &= 0xfc
				R3 += 4					//[y]换到下一页起始位置
				[y] = R3
				R3 = [ysize]
				R3 = R3 -4 
				R3 += [k]
				[ysize] = R3			//计算还要写的行值	
				R3 = [R_LcdStartDot]
				R3 &= 0xFF				//得到x0指针
				[x] = R3		
?_Lcd_Block_MiddlePage:
				R1	= 0xff
		    	CALL F_LCDData_Change
			    R3	= R1	
				[mask] = R3				//		
				R3 = [ysize]
				CMP	 R3 ,4				//看是否还要写一满页？
				JB		?_Lcd_Block_LastPage				
?_Lcd_Block_MiddlePage1:
				R3 = 0xFF
				[LcdBuffer] = R3
				R1 = [y]
				R1 = R1 LSR	2			//得到写入页值
				R2 = [x]				//得到写入列值
				R3 = LcdBuffer
				R4 = 1					//写入长度为1个字节
				CALL	__LcdPageWrite	//调用页写入程序
				R3 = [x]				//向下移一个字