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签到天数: 2350 天 连续签到: 432 天 [LV.Master]伴坛终老
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发表于 2020-3-1 16:16:34
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接上LCD底层驱动API函数如下：
- #include "bsp_lcdapi.h"
- #include "font.h"
- /*
- * @description : 画线函数
- * @param - x1 : 线起始点坐标X轴
- * @param - y1 : 线起始点坐标Y轴
- * @param - x2 : 线终止点坐标X轴
- * @param - y2 : 线终止点坐标Y轴
- * @return : 无
- */
- void lcd_drawline(unsigned short x1, unsigned short y1, unsigned short x2, unsigned short y2)
- {
- u16 t;
- int xerr = 0, yerr = 0, delta_x, delta_y, distance;
- int incx, incy, uRow, uCol;
- delta_x = x2 - x1; /* 计算坐标增量 */
- delta_y = y2 - y1;
- uRow = x1;
- uCol = y1;
- if(delta_x > 0) /* 设置单步方向 */
- incx = 1;
- else if(delta_x==0) /* 垂直线 */
- incx = 0;
- else
- {
- incx = -1;
- delta_x = -delta_x;
- }
- if(delta_y>0)
- incy=1;
- else if(delta_y == 0) /* 水平线 */
- incy=0;
- else
- {
- incy = -1;
- delta_y = -delta_y;
- }
- if( delta_x > delta_y) /*选取基本增量坐标轴 */
- distance = delta_x;
- else
- distance = delta_y;
- for(t = 0; t <= distance+1; t++ ) /* 画线输出 */
- {
- lcd_drawpoint(uRow, uCol, tftlcd_dev.forecolor); /* 画点 */
- xerr += delta_x ;
- yerr += delta_y ;
- if(xerr > distance)
- {
- xerr -= distance;
- uRow += incx;
- }
- if(yerr > distance)
- {
- yerr -= distance;
- uCol += incy;
- }
- }
- }
- /*
- * @description : 画矩形函数
- * @param - x1 : 矩形左上角坐标X轴
- * @param - y1 : 矩形左上角坐标Y轴
- * @param - x2 : 矩形右下角坐标X轴
- * @param - y2 : 矩形右下角坐标Y轴
- * @return : 无
- */
- void lcd_draw_rectangle(unsigned short x1, unsigned short y1, unsigned short x2, unsigned short y2)
- {
- lcd_drawline(x1, y1, x2, y1);
- lcd_drawline(x1, y1, x1, y2);
- lcd_drawline(x1, y2, x2, y2);
- lcd_drawline(x2, y1, x2, y2);
- }
- /*
- * @description : 在指定位置画一个指定大小的圆
- * @param - x0 : 圆心坐标X轴
- * @param - y0 : 圆心坐标Y轴
- * @param - y2 : 圆形半径
- * @return : 无
- */
- void lcd_draw_Circle(unsigned short x0,unsigned short y0,unsigned char r)
- {
- int mx = x0, my = y0;
- int x = 0, y = r;
- int d = 1 - r;
- while(y > x) /* y>x即第一象限的第1区八分圆 */
- {
- lcd_drawpoint(x + mx, y + my, tftlcd_dev.forecolor);
- lcd_drawpoint(y + mx, x + my, tftlcd_dev.forecolor);
- lcd_drawpoint(-x + mx, y + my, tftlcd_dev.forecolor);
- lcd_drawpoint(-y + mx, x + my, tftlcd_dev.forecolor);
- lcd_drawpoint(-x + mx, -y + my, tftlcd_dev.forecolor);
- lcd_drawpoint(-y + mx, -x + my, tftlcd_dev.forecolor);
- lcd_drawpoint(x + mx, -y + my, tftlcd_dev.forecolor);
- lcd_drawpoint(y + mx, -x + my, tftlcd_dev.forecolor);
- if( d < 0)
- {
- d = d + 2 * x + 3;
- }
- else
- {
- d= d + 2 * (x - y) + 5;
- y--;
- }
- x++;
- }
- }
- /*
- * @description : 在指定位置显示一个字符
- * @param - x : 起始坐标X轴
- * @param - y : 起始坐标Y轴
- * @param - num : 显示字符
- * @param - size: 字体大小, 可选12/16/24/32
- * @param - mode: 叠加方式(1)还是非叠加方式(0)
- * @return : 无
- */
- void lcd_showchar(unsigned short x, unsigned short y,
- unsigned char num, unsigned char size,
- unsigned char mode)
- {
- unsigned char temp, t1, t;
- unsigned short y0 = y;
- unsigned char csize = (size / 8+ ((size % 8) ? 1 : 0)) * (size / 2); /* 得到字体一个字符对应点阵集所占的字节数 */
- num = num - ' '; /*得到偏移后的值（ASCII字库是从空格开始取模，所以-' '就是对应字符的字库） */
- for(t = 0; t < csize; t++)
- {
- if(size == 12) temp = asc2_1206[num][t]; /* 调用1206字体 */
- else if(size == 16)temp = asc2_1608[num][t]; /* 调用1608字体 */
- else if(size == 24)temp = asc2_2412[num][t]; /* 调用2412字体 */
- else if(size == 32)temp = asc2_3216[num][t]; /* 调用3216字体 */
- else return; /* 没有的字库 */
- for(t1 = 0; t1 < 8; t1++)
- {
- if(temp & 0x80)lcd_drawpoint(x, y, tftlcd_dev.forecolor);
- else if(mode==0)lcd_drawpoint(x, y, tftlcd_dev.backcolor);
- temp <<= 1;
- y++;
- if(y >= tftlcd_dev.height) return; /* 超区域了 */
- if((y - y0) == size)
- {
- y = y0;
- x++;
- if(x >= tftlcd_dev.width) return; /* 超区域了 */
- break;
- }
- }
- }
- }
- /*
- * @description : 计算m的n次方
- * @param - m : 要计算的值
- * @param - n : n次方
- * @return : m^n次方.
- */
- unsigned int lcd_pow(unsigned char m,unsigned char n)
- {
- unsigned int result = 1;
- while(n--) result *= m;
- return result;
- }
- /*
- * @description : 显示指定的数字，高位为0则不显示
- * @param - x : 起始坐标点X轴。
- * @param - y : 起始坐标点Y轴。
- * @param - num : 数值(0~999999999)。
- * @param - len : 数字位数。
- * @param - size: 字体大小
- * @return : 无
- */
- void lcd_shownum(unsigned short x,
- unsigned short y,
- unsigned int num,
- unsigned char len,
- unsigned char size)
- {
- unsigned char t, temp;
- unsigned char enshow = 0;
- for(t = 0; t < len; t++)
- {
- temp = (num / lcd_pow(10, len - t - 1)) % 10;
- if(enshow == 0 && t < (len - 1))
- {
- if(temp == 0)
- {
- lcd_showchar(x + (size / 2) * t, y, ' ', size, 0);
- continue;
- }else enshow = 1;
- }
- lcd_showchar(x + (size / 2) * t, y, temp + '0', size, 0);
- }
- }
- /*
- * @description : 显示指定的数字，高位为0,还是显示
- * @param - x : 起始坐标点X轴。
- * @param - y : 起始坐标点Y轴。
- * @param - num : 数值(0~999999999)。
- * @param - len : 数字位数。
- * @param - size : 字体大小
- * @param - mode : [7]:0,不填充;1,填充0.
- * [6:1]:保留
- * [0]:0,非叠加显示;1,叠加显示.
- * @return : 无
- */
- void lcd_showxnum(unsigned short x, unsigned short y,
- unsigned int num, unsigned char len,
- unsigned char size, unsigned char mode)
- {
- unsigned char t, temp;
- unsigned char enshow = 0;
- for(t = 0; t < len; t++)
- {
- temp = (num / lcd_pow(10, len - t- 1)) % 10;
- if(enshow == 0 && t < (len - 1))
- {
- if(temp == 0)
- {
- if(mode & 0X80) lcd_showchar(x + (size / 2) * t, y, '0', size, mode & 0X01);
- else lcd_showchar(x + (size / 2) * t, y , ' ', size, mode & 0X01);
- continue;
- }else enshow=1;
- }
- lcd_showchar( x + (size / 2) * t, y, temp + '0' , size , mode & 0X01);
- }
- }
- /*
- * @description : 显示一串字符串
- * @param - x : 起始坐标点X轴。
- * @param - y : 起始坐标点Y轴。
- * @param - width : 字符串显示区域长度
- * @param - height : 字符串显示区域高度
- * @param - size : 字体大小
- * @param - p : 要显示的字符串首地址
- * @return : 无
- */
- void lcd_show_string(unsigned short x,unsigned short y,
- unsigned short width,unsigned short height,
- unsigned char size,char *p)
- {
- unsigned char x0 = x;
- width += x;
- height += y;
- while((*p <= '~') &&(*p >= ' ')) /* 判断是不是非法字符! */
- {
- if(x >= width) {x = x0; y += size;}
- if(y >= height) break; /* 退出 */
- lcd_showchar(x, y, *p , size, 0);
- x += size / 2;
- p++;
- }
- }
- #ifndef BSP_LCDAPI_H
- #define BSP_LCDAPI_H
- #include "imx6ul.h"
- #include "bsp_lcd.h"
- /* 函数声明 */
- void lcd_drawline(unsigned short x1, unsigned short y1, unsigned short x2, unsigned short y2);
- void lcd_draw_rectangle(unsigned short x1, unsigned short y1, unsigned short x2, unsigned short y2);
- void lcd_draw_Circle(unsigned short x0,unsigned short y0,unsigned char r);
- void lcd_showchar(unsigned short x,unsigned short y,unsigned char num,unsigned char size, unsigned char mode);
- unsigned int lcd_pow(unsigned char m,unsigned char n);
- void lcd_shownum(unsigned short x, unsigned short y, unsigned int num, unsigned char len,unsigned char size);
- void lcd_showxnum(unsigned short x, unsigned short y, unsigned int num, unsigned char len, unsigned char size, unsigned char mode);
- void lcd_show_string(unsigned short x,unsigned short y,
- unsigned short width, unsigned short height, unsigned char size,char *p);
- #endif
- #include "bsp_clk.h"
- #include "bsp_delay.h"
- #include "bsp_led.h"
- #include "bsp_beep.h"
- #include "bsp_key.h"
- #include "bsp_int.h"
- #include "bsp_uart.h"
- #include "stdio.h"
- #include "bsp_lcd.h"
- #include "bsp_lcdapi.h"
- /* 背景颜色索引 */
- unsigned int backcolor[10] = {
- LCD_BLUE, LCD_GREEN, LCD_RED, LCD_CYAN, LCD_YELLOW,
- LCD_LIGHTBLUE, LCD_DARKBLUE, LCD_WHITE, LCD_BLACK, LCD_ORANGE
- };
- /*
- * @description : main函数
- * @param : 无
- * @return : 无
- */
- int main(void)
- {
- unsigned char index = 0;
- unsigned char state = OFF;
- int_init(); /* 初始化中断(一定要最先调用！) */
- imx6u_clkinit(); /* 初始化系统时钟 */
- delay_init(); /* 初始化延时 */
- clk_enable(); /* 使能所有的时钟 */
- led_init(); /* 初始化led */
- beep_init(); /* 初始化beep */
- uart_init(); /* 初始化串口，波特率115200 */
- lcd_init(); /* 初始化LCD */
- tftlcd_dev.forecolor = LCD_RED;
- lcd_show_string(10,10,400,32,32,(char*)"WELCOME TEST IMX6ULL LCD"); /* 显示字符串 */
- lcd_draw_rectangle(10, 52, 790, 290); /* 绘制矩形框 */
- lcd_drawline(10, 52,790, 290); /* 绘制线条 */
- lcd_drawline(10, 290,790, 52); /* 绘制线条 */
- lcd_draw_Circle(400, 171, 119); /* 绘制圆形 */
- lcd_draw_Circle(400, 171, 99); /* 绘制圆形 */
- lcd_draw_Circle(400, 171, 79); /* 绘制圆形 */
- lcd_draw_Circle(400, 171, 59); /* 绘制圆形 */
- lcd_draw_Circle(400, 171, 39); /* 绘制圆形 */
- while(1)
- {
- index++;
- if(index == 10)
- index = 0;
- lcd_fill(10, 300, 790, 470, backcolor[index]);
- lcd_show_string(610,10,240,32,32,(char*)"INDEX="); /*显示字符串 */
- lcd_shownum(700,10, index, 2, 32); /* 显示数字，叠加显示 */
- state = !state;
- led_switch(LED0,state);
- delayms(1000); /* 延时一秒 */
- }
- return 0;
- }
最后奉上此次实现驱动LCD的现象结果：
屏驱动视频演示
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发表于 2020-2-23 19:28:43
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