基于C语言实现SD卡(含源代码+使用说明).zip

/* ================================================================================ File Name : GUI_Basic.c Author : LiYOng Date : 2008-12-12 15:51 Version : 1.0 Decription: This file contains some basic functions for GUI, It need the LCD Drive functions ================================================================================ */ #include "GUI_Basic.H" #include "GUI_Type.H" #include "fontlib.h" /* ================================================================================ Function : GUI_DrawRectangle( ) Description : Draw a rectangle Input : -pRect, point to a rectangle structure output : None ================================================================================ */ void GUI_DrawRectangle( RECT* pRect ) { LINE line; line.xs = pRect->xs; line.xe = pRect->xe; line.ys = pRect->ys; line.ye = pRect->ys; line.Color = pRect->Color; LCDDrawHRLine( &line ); line.xe = pRect->xs; line.ye = pRect->ye; LCDDrawHRLine( &line ); line.xs = pRect->xe; line.ys = pRect->ye; LCDDrawHRLine( &line ); line.xe = pRect->xe; line.ye = pRect->ys; LCDDrawHRLine( &line ); } /* ================================================================================ Function : GUI_DrawLine( ) Description : Draw a line Input : -pLine, point to a line structure output : None ================================================================================ */ void GUI_DrawLine( LINE* pLine ) { INT32S dx; // 直线x轴差值变量 INT32S dy; // 直线y轴差值变量 INT32S dx_sym; // x轴增长方向，为-1时减值方向，为1时增值方向 INT32S dy_sym; // y轴增长方向，为-1时减值方向，为1时增值方向 INT32S dx_x2; // dx*2值变量，用于加快运算速度 INT32S dy_x2; // dy*2值变量，用于加快运算速度 INT32S di; // 决策变量 POINT point; LINE line; line.xs = pLine->xs; line.ys = pLine->ys; line.xe = pLine->xe; line.ye = pLine->ye; line.Color = pLine->Color; point.Color = pLine->Color; dx = line.xe - line.xs; dy = line.ye - line.ys; /* 判断增长方向，或是否为水平线、垂直线、点 */ if( dx > 0 ) // 判断x轴方向 { dx_sym = 1; // dx>0，设置dx_sym=1 } else { if( dx < 0 ) { dx_sym = -1; // dx<0，设置dx_sym=-1 } else { LCDDrawHRLine( &line ); return; } } if( dy > 0 ) // 判断y轴方向 { dy_sym = 1; // dy>0，设置dy_sym=1 } else { if( dy < 0 ) { dy_sym = -1; // dy<0，设置dy_sym=-1 } else { // dy==0，画水平线，或一点 LCDDrawHRLine( &line ); return; } } /* 将dx、dy取绝对值 */ dx = dx_sym * dx; dy = dy_sym * dy; /* 计算2倍的dx及dy值 */ dx_x2 = dx*2; dy_x2 = dy*2; /* 使用Bresenham法进行画直线 */ if( dx >= dy ) // 对于dx>=dy，则使用x轴为基准 { di = dy_x2 - dx; while( line.xs != line.xe ) { point.x = line.xs; point.y = line.ys; LCDDrawPoint( &point ); line.xs += dx_sym; if( di < 0 ) { di += dy_x2; // 计算出下一步的决策值 } else { di += dy_x2 - dx_x2; line.ys += dy_sym; } } LCDDrawPoint( &point ); // 显示最后一点 } else // 对于dx<dy，则使用y轴为基准 { di = dx_x2 - dy; while( line.ys != line.ye ) { point.x = line.xs; point.y = line.ys; LCDDrawPoint( &point ); line.ys += dy_sym; if(di<0) { di += dx_x2; } else { di += dx_x2 - dy_x2; line.xs += dx_sym; } } LCDDrawPoint( &point ); // 显示最后一点 } } /* ================================================================================ Name: PrintFont Function: Display a character at a special area Input: 1.Xs : Start position X 2.Ys : Start position Y 3.pFont : A pointer of a font structure 4.Character : The ASCII code of the character. Output: None Note: The start position is inputted as a parameter, And the end position is calculated by the FONT structure. Author: LiYong Date : 2008.08.09 ================================================================================ */ void GUI_DisplayFont( INT8U Xs, INT8U Ys, FONT* pFont, char Character ) { BitBlock Block; INT32U Bytes; INT8U DataBuffer[64]; INT8U i; const unsigned char *offset; Block.Height = pFont->Height; Block.Width = pFont->Width; Block.Color = pFont->Color; Block.BackColor = pFont->BackColor; Block.xs = Xs; Block.ys = Ys; Bytes = pFont->Width >> 3; if( pFont->Width & 0x07 ) { Bytes ++; } Bytes *= pFont->Height; Bytes *= Character - ' '; if( pFont->Height == 18 ) { offset = (const unsigned char*)&FontLib_18; } else if( pFont->Height == 14 ) { offset = (const unsigned char*)&FontLib_14; } else { return; } offset += Bytes; for( i = 0; i < 36; i ++ ) { //DataBuffer[i] = pgm_read_byte( offset + i ); } Block.pData = DataBuffer; PrintBitBlock( &Block ); } /* ======================================================================================================== Name: DisplayStr Function: Display a character at a special area Input: 1.Xs : Start position X 2.Ys : Start position Y 3.pFont : A pointer of a font structure 4.Str : The start address of a string Output: None Note: The start position is inputted as a parameter, And the end position is calculated by the FONT structure. Author: LiYong Date : 2008.08.09 ======================================================================================================== */ void GUI_DisplayStr( INT8U xs, INT8U ys, FONT* pFont, char* Str ) { while( *Str ) { GUI_DisplayFont( xs, ys, pFont, *Str ); Str ++; xs += pFont->Width; } } /* ================================================================================ Name: GUI_DrawCircle( ) Function: Display a cycle at a special area Input: -pCycle, A pinter point to a cycle structure Output: None Author: LiYong Date : 2008.08.09 ================================================================================ */ void GUI_DrawCircle( CIRCLE* pCircle ) { INT8S draw_x0, draw_y0; // 刽图点坐标变量 INT8S draw_x1, draw_y1; INT8S draw_x2, draw_y2; INT8S draw_x3, draw_y3; INT8S draw_x4, draw_y4; INT8S draw_x5, draw_y5; INT8S draw_x6, draw_y6; INT8S draw_x7, draw_y7; INT8S xx, yy; // 画圆控制变量 INT8S di; // 决策变量 POINT point; point.Color = pCircle->Color; /* 参数过滤 */ if(0 == pCircle->r ) return; /* 计算出8个特殊点(0、45、90、135、180、225、270度)，进行显示 */ point.x = draw_x0 = draw_x1 = pCircle->x; point.y = draw_y0 = draw_y1 = pCircle->y + pCircle->r; if( draw_y0 < GUI_LCM_YMAX ) LCDDrawPoint( &point ); // 90度 point.x = draw_x2 = draw_x3 = pCircle->x; point.y = draw_y2 = draw_y3 = pCircle->y - pCircle->r; if( draw_y2 >= 0 ) LCDDrawPoint( &point ); // 270度 point.x = draw_x4 = draw_x6 = pCircle->x + pCircle->r; point.y = draw_y4 = draw_y6 = pCircle->y; if(draw_x4<GUI_LCM_XMAX) LCDDrawPoint( &point ); // 0度 point.x = draw_x5 = draw_x7 = pCircle->x - pCircle->r; point.y = draw_y5 = draw_y7 = pCircle->y; if(draw_x5>=0) LCDDrawPoint( &point ); // 180度 if(1==pCircle->r) return; // 若半径为1，则已圆画完 /* 使用Bresenham法进行画圆 */ di = 3 - 2*pCircle->r; // 初始化决策变量 xx = 0; yy = pCircle->r; while(xx<yy) { if(di<0) { di += 4*xx + 6; } else { di += 4*(xx - yy) + 10; yy--; draw_y0--; draw_y1--; draw_y2++; draw_y3++; draw_x4--; draw_x5++; draw_x6--; draw_x7++; } xx++; draw_x0++; draw_x1--; draw_x2++; draw_x3--; draw_y4++; draw_y5++; draw_y6--; draw_y7--; /* 要判断当前点是否在有效范围内 */ if( (draw_x0<=GUI_LCM_XMAX)&&(draw_y0>