17_I.MX6ULL_LCD实验源码

#ifndef _BSP_LCD_H
#define _BSP_LCD_H

#include "imx6ul.h"

/* 颜色 */
#define LCD_BLUE		  0x000000FF
#define LCD_GREEN		  0x0000FF00
#define LCD_RED 		  0x00FF0000
#define LCD_CYAN		  0x0000FFFF
#define LCD_MAGENTA 	  0x00FF00FF
#define LCD_YELLOW		  0x00FFFF00
#define LCD_LIGHTBLUE	  0x008080FF
#define LCD_LIGHTGREEN	  0x0080FF80
#define LCD_LIGHTRED	  0x00FF8080
#define LCD_LIGHTCYAN	  0x0080FFFF
#define LCD_LIGHTMAGENTA  0x00FF80FF
#define LCD_LIGHTYELLOW   0x00FFFF80
#define LCD_DARKBLUE	  0x00000080
#define LCD_DARKGREEN	  0x00008000
#define LCD_DARKRED 	  0x00800000
#define LCD_DARKCYAN	  0x00008080
#define LCD_DARKMAGENTA   0x00800080
#define LCD_DARKYELLOW	  0x00808000
#define LCD_WHITE		  0x00FFFFFF
#define LCD_LIGHTGRAY	  0x00D3D3D3
#define LCD_GRAY		  0x00808080
#define LCD_DARKGRAY	  0x00404040
#define LCD_BLACK		  0x00000000
#define LCD_BROWN		  0x00A52A2A
#define LCD_ORANGE		  0x00FFA500
#define LCD_TRANSPARENT   0x00000000

/* 屏幕ID */
#define ATK4342		0X4342	/* 4.3寸480*272 	*/
#define ATK4384		0X4384	/* 4.3寸800*480 	*/
#define ATK7084		0X7084	/* 7寸800*480 		*/
#define ATK7016		0X7016	/* 7寸1024*600 		*/
#define ATK1018		0X1018	/* 10.1寸1280*800 	*/
#define ATKVGA		0xff00 /* VGA */

/* LCD显存地址 */
#define LCD_FRAMEBUF_ADDR	(0x89000000)

/* LCD控制参数结构体 */
struct tftlcd_typedef{
	unsigned short height;		/* LCD屏幕高度 */
	unsigned short width;		/* LCD屏幕宽度 */
	unsigned char pixsize;		/* LCD每个像素所占字节大小 */
	unsigned short vspw;
	unsigned short vbpd;
	unsigned short vfpd;
	unsigned short hspw;
	unsigned short hbpd;
	unsigned short hfpd;
	unsigned int framebuffer; 	/* LCD显存首地址*/
	unsigned int forecolor;		/* 前景色 */
	unsigned int backcolor;		/* 背景色 */
	unsigned int id;  			/*	屏幕ID */
};

extern struct tftlcd_typedef tftlcd_dev;


/* 函数声明 */
void lcd_init(void);
unsigned short lcd_read_panelid(void);
void lcdgpio_init(void);
void lcdclk_init(unsigned char loopDiv, unsigned char prediv, unsigned char div);
void lcd_reset(void);
void lcd_noreset(void);
void lcd_enable(void);
void video_pllinit(unsigned char loopdivi, unsigned char postdivi);

inline void lcd_drawpoint(unsigned short x,unsigned short y,unsigned int color);
inline unsigned int lcd_readpoint(unsigned short x,unsigned short y);
void lcd_clear(unsigned int color);
void lcd_fill(unsigned    short x0, unsigned short y0, unsigned short x1, unsigned short y1, unsigned int color);
#endif

#include "bsp_lcd.h"
#include "bsp_gpio.h"
#include "bsp_delay.h"
#include "stdio.h"

/* 液晶屏参数结构体 */
struct tftlcd_typedef tftlcd_dev;

/*
 * @description	: 始化LCD
 * @param 		: 无
 * @return 		: 无
 */
void lcd_init(void)
{
	unsigned short lcdid = 0;

	lcdid = lcd_read_panelid();		/* 读取屏幕ID值 		*/
	tftlcd_dev.id = lcdid;
	printf("LCD ID=%#X\r\n", lcdid);

	lcdgpio_init();			/* 初始化IO 			*/
	lcd_reset();			/* 复位LCD  			*/
	delay_ms(10);			/* 延时10ms 			*/
	lcd_noreset();			/* 结束复位 			*/


	/* TFTLCD参数结构体初始化 */
	if(lcdid == ATK4342) {
		tftlcd_dev.height = 272;	
		tftlcd_dev.width = 480;
		tftlcd_dev.vspw = 1;
		tftlcd_dev.vbpd = 8;
		tftlcd_dev.vfpd = 8;
		tftlcd_dev.hspw = 1;
		tftlcd_dev.hbpd = 40;
		tftlcd_dev.hfpd = 5; 	
		lcdclk_init(27, 8, 8);	/* 初始化LCD时钟 10.1MHz */
	} else if(lcdid == ATK4384) {
		tftlcd_dev.height = 480;	
		tftlcd_dev.width = 800;
		tftlcd_dev.vspw = 3;
		tftlcd_dev.vbpd = 32;
		tftlcd_dev.vfpd = 13;
		tftlcd_dev.hspw = 48;
		tftlcd_dev.hbpd = 88;
		tftlcd_dev.hfpd = 40;
		lcdclk_init(42, 4, 8);	/* 初始化LCD时钟 31.5MHz */
	} else if(lcdid == ATK7084) {
		tftlcd_dev.height = 480;	
		tftlcd_dev.width = 800;
		tftlcd_dev.vspw = 1;
		tftlcd_dev.vbpd = 23;
		tftlcd_dev.vfpd = 22;
		tftlcd_dev.hspw = 1;
		tftlcd_dev.hbpd = 46;
		tftlcd_dev.hfpd = 210;	
		lcdclk_init(30, 3, 7);	/* 初始化LCD时钟 34.2MHz */
	} else if(lcdid == ATK7016) {
		tftlcd_dev.height = 600;	
		tftlcd_dev.width = 1024;
		tftlcd_dev.vspw = 3;
		tftlcd_dev.vbpd = 20;
		tftlcd_dev.vfpd = 12;
		tftlcd_dev.hspw = 20;
		tftlcd_dev.hbpd = 140;
		tftlcd_dev.hfpd = 160;
		lcdclk_init(32, 3, 5);	/* 初始化LCD时钟 51.2MHz */
	} else if(lcdid == ATK1018) {
		tftlcd_dev.height = 800;	
		tftlcd_dev.width = 1280;
		tftlcd_dev.vspw = 3;
		tftlcd_dev.vbpd = 10;
		tftlcd_dev.vfpd = 10;
		tftlcd_dev.hspw = 10;
		tftlcd_dev.hbpd = 80;
		tftlcd_dev.hfpd = 70;
		lcdclk_init(35, 3, 5);	/* 初始化LCD时钟 56MHz */
	} else if(lcdid == ATKVGA) {  
		tftlcd_dev.height = 768;	
		tftlcd_dev.width = 1366;
		tftlcd_dev.vspw = 3;
		tftlcd_dev.vbpd = 24;
		tftlcd_dev.vfpd = 3;
		tftlcd_dev.hspw = 143;
		tftlcd_dev.hbpd = 213;
		tftlcd_dev.hfpd = 70;
		lcdclk_init(32, 3, 3);	/* 初始化LCD时钟 85MHz */
	}
	tftlcd_dev.pixsize = 4;				/* ARGB8888模式，每个像素4字节 */
	tftlcd_dev.framebuffer = LCD_FRAMEBUF_ADDR;	
	tftlcd_dev.backcolor = LCD_WHITE;	/* 背景色为白色 */
	tftlcd_dev.forecolor = LCD_BLACK;	/* 前景色为黑色 */
     
	/* 初始化ELCDIF的CTRL寄存器
     * bit [31] 0 : 停止复位
     * bit [19] 1 : 旁路计数器模式
     * bit [17] 1 : LCD工作在dotclk模式
     * bit [15:14] 00 : 输入数据不交换
     * bit [13:12] 00 : CSC不交换
     * bit [11:10] 11 : 24位总线宽度
     * bit [9:8]   11 : 24位数据宽度,也就是RGB888
     * bit [5]     1  : elcdif工作在主模式
     * bit [1]     0  : 所有的24位均有效
	 */
	 LCDIF->CTRL |= (1 << 19) | (1 << 17) | (0 << 14) | (0 << 12) |
	 				(3 << 10) | (3 << 8) | (1 << 5) | (0 << 1);
	/*
     * 初始化ELCDIF的寄存器CTRL1
     * bit [19:16]  : 0X7 ARGB模式下，传输24位数据，A通道不用传输
	 */	
	 LCDIF->CTRL1 = 0X7 << 16; 

	 /*
      * 初始化ELCDIF的寄存器TRANSFER_COUNT寄存器
      * bit [31:16]  : 高度
      * bit [15:0]   : 宽度
	  */
	LCDIF->TRANSFER_COUNT  = (tftlcd_dev.height << 16) | (tftlcd_dev.width << 0);

	/*
     * 初始化ELCDIF的VDCTRL0寄存器
     * bit [29] 0 : VSYNC输出
     * bit [28] 1 : 使能ENABLE输出
     * bit [27] 0 : VSYNC低电平有效
     * bit [26] 0 : HSYNC低电平有效
     * bit [25] 0 : DOTCLK上升沿有效
     * bit [24] 1 : ENABLE信号高电平有效
     * bit [21] 1 : DOTCLK模式下设置为1
     * bit [20] 1 : DOTCLK模式下设置为1
     * bit [17:0] : vsw参数
	 */
	LCDIF->VDCTRL0 = 0;	//先清零
	if(lcdid == ATKVGA) {   //VGA需要特殊处理
		LCDIF->VDCTRL0 = (0 << 29) | (1 << 28) | (0 << 27) |
					 (0 << 26) | (1 << 25) | (0 << 24) |
					 (1 << 21) | (1 << 20) | (tftlcd_dev.vspw << 0);
	} else {
		LCDIF->VDCTRL0 = (0 << 29) | (1 << 28) | (0 << 27) |
					 (0 << 26) | (0 << 25) | (1 << 24) |
					 (1 << 21) | (1 << 20) | (tftlcd_dev.vspw << 0);
	}

	/*
	 * 初始化ELCDIF的VDCTRL1寄存器
	 * 设置VSYNC总周期
	 */  
	LCDIF->VDCTRL1 = tftlcd_dev.height + tftlcd_dev.vspw + tftlcd_dev.vfpd + tftlcd_dev.vbpd;  //VSYNC周期
	 
	 /*
	  * 初始化ELCDIF的VDCTRL2寄存器
	  * 设置HSYNC周期
	  * bit[31:18] ：hsw
	  * bit[17:0]  : HSYNC总周期
	  */ 
	LCDIF->VDCTRL2 = (tftlcd_dev.hspw << 18) | (tftlcd_dev.width + tftlcd_dev.hspw + tftlcd_dev.hfpd + tftlcd_dev.hbpd);

	/*
	 * 初始化ELCDIF的VDCTRL3寄存器
	 * 设置HSYNC周期
	 * bit[27:16] ：水平等待时钟数
	 * bit[15:0]  : 垂直等待时钟数
	 */ 
	LCDIF->VDCTRL3 = ((tftlcd_dev.hbpd + tftlcd_dev.hspw) << 16) | (tftlcd_dev.vbpd + tftlcd_dev.vspw);

	/*
	 * 初始化ELCDIF的VDCTRL4寄存器
	 * 设置HSYNC周期
	 * bit[18] 1 : 当使用VSHYNC、HSYNC、DOTCLK的话此为置1
	 * bit[17:0]  : 宽度
	 */ 
	
	LCDIF->VDCTRL4 = (1<<18) | (tftlcd_dev.width);

	/*
     * 初始化ELCDIF的CUR_BUF和NEXT_BUF寄存器
     * 设置当前显存地址和下一帧的显存地址
	 */
	LCDIF->CUR_BUF = (unsigned int)tftlcd_dev.framebuffer;
	LCDIF->NEXT_BUF = (unsigned int)tftlcd_dev.framebuffer;


	lcd_enable();			/* 使能LCD 	*/
	delay_ms(10);
	lcd_clear(LCD_WHITE);	/* 清屏 		*/
	
}

/*
 * 读取屏幕ID，
 * 描述：LCD_DATA23=R7(M0);LCD_DATA15=G7(M1);LCD_DATA07=B7(M2);
 * 		M2:M1:M0
 *		0 :0 :0	//4.3寸480*272 RGB屏,ID=0X4342
 *		0 :0 :1	//7寸800*480 RGB屏,ID=0X7084
 *	 	0 :1 :0	//7寸1024*600 RGB屏,ID=0X7016
 *  	1 :0 :1	//10.1寸1280*800,RGB屏,ID=0X1018
 *		1 :0 :0	//4.3寸800*480 RGB屏,ID=0X4384
 * @param 		: 无
 * @return 		: 屏幕ID
 */
unsigned short lcd_read_panelid(void)
{
	unsigned char idx = 0;

	/* 配置屏幕ID信号线 */
	IOMUXC_SetPinMux(IOMUXC_LCD_VSYNC_GPIO3_IO03, 0);
	IOMUXC_SetPinConfig(IOMUXC_LCD_VSYNC_GPIO3_IO03, 0X10B0);

	/* 打开模拟开关 */
	gpio_pin_config_t idio_config;
	idio_config.direction = kGPIO_DigitalOutput;
	idio_config.outputLogic = 1;
	gpio_init(GPIO3, 3, &idio_config);

	/* 读取ID值，设置G7 B7 R7为输入 */
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA07_GPIO3_IO12, 0);		/* B7(M2) */
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA15_GPIO3_IO20, 0);		/* G7(M1) */
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA23_GPIO3_IO28, 0);		/* R7(M0) */

	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA07_GPIO3_IO12, 0xF080);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA15_GPIO3_IO20, 0xF080);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA23_GPIO3_IO28, 0xF080);  

	idio_config.direction = kGPIO_DigitalInput;
	gpio_init(GPIO3, 12, &idio_config);
	gpio_init(GPIO3, 20, &idio_config);
	gpio_init(GPIO3, 28, &idio_config);

	idx = (unsigned char)gpio_pinread(GPIO3, 28); 	/* 读取M0 */
	idx |= (unsigned char)gpio_pinread(GPIO3, 20) << 1;	/* 读取M1 */
	idx |= (unsigned char)gpio_pinread(GPIO3, 12) << 2;	/* 读取M2 */

	if(idx==0)return ATK4342;		//4.3寸屏,480*272分辨率
	else if(idx==1)return ATK7084;	//7寸屏,800*480分辨率
	else if(idx==2)return ATK7016;	//7寸屏,1024*600分辨率
	else if(idx==4)return ATK4384;	//4寸屏,800*480分辨率
	else if(idx==5)return ATK1018;	//10.1寸屏,1280*800分辨率		
	else if(idx==7)return ATKVGA;   //VGA模块，1366*768分辨率
	else return 0;

}

 
/*
 * @description	: LCD GPIO初始化
 * @param 		: 无
 * @return 		: 无
 */
void lcdgpio_init(void)
{
	gpio_pin_config_t gpio_config;
	

	/* 1、IO初始化复用功能 */
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA00_LCDIF_DATA00,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA01_LCDIF_DATA01,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA02_LCDIF_DATA02,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA03_LCDIF_DATA03,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA04_LCDIF_DATA04,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA05_LCDIF_DATA05,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA06_LCDIF_DATA06,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA07_LCDIF_DATA07,0);
	
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA08_LCDIF_DATA08,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA09_LCDIF_DATA09,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA10_LCDIF_DATA10,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA11_LCDIF_DATA11,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA12_LCDIF_DATA12,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA13_LCDIF_DATA13,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA14_LCDIF_DATA14,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA15_LCDIF_DATA15,0);

	IOMUXC_SetPinMux(IOMUXC_LCD_DATA16_LCDIF_DATA16,0);
	
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA17_LCDIF_DATA17,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA18_LCDIF_DATA18,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA19_LCDIF_DATA19,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA20_LCDIF_DATA20,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA21_LCDIF_DATA21,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA22_LCDIF_DATA22,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_DATA23_LCDIF_DATA23,0);

	IOMUXC_SetPinMux(IOMUXC_LCD_CLK_LCDIF_CLK,0);	
	IOMUXC_SetPinMux(IOMUXC_LCD_ENABLE_LCDIF_ENABLE,0);	
	IOMUXC_SetPinMux(IOMUXC_LCD_HSYNC_LCDIF_HSYNC,0);
	IOMUXC_SetPinMux(IOMUXC_LCD_VSYNC_LCDIF_VSYNC,0);

	IOMUXC_SetPinMux(IOMUXC_GPIO1_IO08_GPIO1_IO08,0);			/* 背光BL引脚      */
	IOMUXC_SetPinConfig(IOMUXC_UART1_CTS_B_GPIO1_IO18,0xF080);
					

	/* 2、配置LCD IO属性	
	 *bit 16:0 HYS关闭
	 *bit [15:14]: 0 默认22K上拉
	 *bit [13]: 0 pull功能
	 *bit [12]: 0 pull/keeper使能 
	 *bit [11]: 0 关闭开路输出
	 *bit [7:6]: 10 速度100Mhz
	 *bit [5:3]: 111 驱动能力为R0/7
	 *bit [0]: 1 高转换率
	 */
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA00_LCDIF_DATA00,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA01_LCDIF_DATA01,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA02_LCDIF_DATA02,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA03_LCDIF_DATA03,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA04_LCDIF_DATA04,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA05_LCDIF_DATA05,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA06_LCDIF_DATA06,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA07_LCDIF_DATA07,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA08_LCDIF_DATA08,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA09_LCDIF_DATA09,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA10_LCDIF_DATA10,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA11_LCDIF_DATA11,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA12_LCDIF_DATA12,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA13_LCDIF_DATA13,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA14_LCDIF_DATA14,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA15_LCDIF_DATA15,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA16_LCDIF_DATA16,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA17_LCDIF_DATA17,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA18_LCDIF_DATA18,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA19_LCDIF_DATA19,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA20_LCDIF_DATA20,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA21_LCDIF_DATA21,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA22_LCDIF_DATA22,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_DATA23_LCDIF_DATA23,0xB9);

	IOMUXC_SetPinConfig(IOMUXC_LCD_CLK_LCDIF_CLK,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_ENABLE_LCDIF_ENABLE,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_HSYNC_LCDIF_HSYNC,0xB9);
	IOMUXC_SetPinConfig(IOMUXC_LCD_VSYNC_LCDIF_VSYNC,0xB9);

	IOMUXC_SetPinConfig(IOMUXC_GPIO1_IO08_GPIO1_IO08,0xB9);	/* 背光BL引脚 		*/

	/* GPIO初始化 */
	gpio_config.direction = kGPIO_DigitalOutput;			/* 输出 			*/
	gpio_config.outputLogic = 1; 							/* 默认关闭背光 */
	gpio_init(GPIO1, 8, &gpio_config);						/* 背光默认打开 */
	gpio_pinwrite(GPIO1, 8, 1);								/* 打开背光     */
}

/*
 * @description		: LCD时钟初始化, LCD时钟计算公式如下：
 *                	  LCD CLK = 24 * loopDiv / prediv / div
 * @param -	loopDiv	: loopDivider值
 * @param -	prediv  : lcdifprediv值
 * @param -	div		: lcdifdiv值
 * @return 			: 无
 */
void lcdclk_init(unsigned char loopDiv, unsigned char prediv, unsigned char div)
{
	/* 先初始化video pll 
     * VIDEO PLL = OSC24M * (loopDivider + (denominator / numerator)) / postDivider
 	 *不使用小数分频器，因此denominator和numerator设置为0
 	 */
	CCM_ANALOG->PLL_VIDEO_NUM = 0;		/* 不使用小数分频器 */
	CCM_ANALOG->PLL_VIDEO_DENOM = 0;	

	/*
     * PLL_VIDEO寄存器设置
     * bit[13]:    1   使能VIDEO PLL时钟
     * bit[20:19]  2  设置postDivider为1分频
     * bit[6:0] : 32  设置loopDivider寄存器
	 */
	CCM_ANALOG->PLL_VIDEO =  (2 << 19) | (1 << 13) | (loopDiv << 0); 

	/*
     * MISC2寄存器设置
     * bit[31:30]: 0  VIDEO的post-div设置，时钟源来源于postDivider，1分频
	 */
	CCM_ANALOG->MISC2 &= ~(3 << 30);
	CCM_ANALOG->MISC2 = 0 << 30;

	/* LCD时钟源来源与PLL5，也就是VIDEO           PLL  */
	CCM->CSCDR2 &= ~(7 << 15);  	
	CCM->CSCDR2 |= (2 << 15);			/* 设置LCDIF_PRE_CLK使用PLL5 */

	/* 设置LCDIF_PRE分频 */
	CCM->CSCDR2 &= ~(7 << 12);		
	CCM->CSCDR2 |= (prediv - 1) << 12;	/* 设置分频  */

	/* 设置LCDIF分频 */
	CCM->CBCMR &= ~(7 << 23);					
	CCM->CBCMR |= (div - 1) << 23;				

	/* 设置LCD时钟源为LCDIF_PRE时钟 */
	CCM->CSCDR2 &= ~(7 << 9);					/* 清除原来的设置		 	*/
	CCM->CSCDR2 |= (0 << 9);					/* LCDIF_PRE时钟源选择LCDIF_PRE时钟 */
}

/*
 * @description	: 复位ELCDIF接口
 * @param 		: 无
 * @return 		: 无
 */
void lcd_reset(void)
{
	LCDIF->CTRL  = 1<<31; /* 强制复位 */
}

/*
 * @description	: 结束复位ELCDIF接口
 * @param 		: 无
 * @return 		: 无
 */
void lcd_noreset(void)
{
	LCDIF->CTRL  = 0<<31; /* 取消强制复位 */
}

/*
 * @description	: 使能ELCDIF接口
 * @param 		: 无
 * @return 		: 无
 */
void lcd_enable(void)
{
	LCDIF->CTRL |= 1<<0; /* 使能ELCDIF */
}

/*
 * @description		: 画点函数 
 * @param - x		: x轴坐标
 * @param - y		: y轴坐标
 * @param - color	: 颜色值
 * @return 			: 无
 */
inline void lcd_drawpoint(unsigned short x,unsigned short y,unsigned int color)
{ 
  	*(unsigned int*)((unsigned int)tftlcd_dev.framebuffer + 
		             tftlcd_dev.pixsize * (tftlcd_dev.width * y+x))=color;
}


/*
 * @description		: 读取指定点的颜色值
 * @param - x		: x轴坐标
 * @param - y		: y轴坐标
 * @return 			: 读取到的指定点的颜色值
 */
inline unsigned int lcd_readpoint(unsigned short x,unsigned short y)
{ 
	return *(unsigned int*)((unsigned int)tftlcd_dev.framebuffer + 
		   tftlcd_dev.pixsize * (tftlcd_dev.width * y + x));
}

/*
 * @description		: 清屏
 * @param - color	: 颜色值
 * @return 			: 读取到的指定点的颜色值
 */
void lcd_clear(unsigned int color)
{
	unsigned int num;
	unsigned int i = 0; 

	unsigned int *startaddr=(unsigned int*)tftlcd_dev.framebuffer;	//指向帧缓存首地址
	num=(unsigned int)tftlcd_dev.width * tftlcd_dev.height;			//缓冲区总长度
	for(i = 0; i < num; i++)
	{
		startaddr[i] = color;
	}		
}

/*
 * @description		: 以指定的颜色填充一块矩形
 * @param - x0		: 矩形起始点坐标X轴
 * @param - y0		: 矩形起始点坐标Y轴
 * @param - x1		: 矩形终止点坐标X轴
 * @param - y1		: 矩形终止点坐标Y轴
 * @param - color	: 要填充的颜色
 * @return 			: 读取到的指定点的颜色值
 */
void lcd_fill(unsigned    short x0, unsigned short y0, 
                 unsigned short x1, unsigned short y1, unsigned int color)
{ 
    unsigned short x, y;

	if(x0 < 0) x0 = 0;
	if(y0 < 0) y0 = 0;
	if(x1 >= tftlcd_dev.width) x1 = tftlcd_dev.width - 1;
	if(y1 >= tftlcd_dev.height) y1 = tftlcd_dev.height - 1;
	
    for(y = y0; y <= y1; y++)
    {
        for(x = x0; x <= x1; x++)
			lcd_drawpoint(x, y, color);
    }
}

#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_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	: 矩形坐上角坐标X轴
 * @param - y1	: 矩形坐上角坐标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的话不显示
 * @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++;
    }  
}

#include "bsp_clk.h"

#include "bsp_delay.h"

#include "bsp_led.h"

#include "bsp_beep.h"

#include "bsp_key_filter.h"

#include "bsp_interrupt.h"

#include "bsp_uart.h"

#include "bsp_lcd.h"

#include "bsp_lcdapi.h"

#include "stdio.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*/

	clk_enable();		/* 使能所有的时钟*/

	delay_init();		/* 延时初始化 */

	uart_init();		/*初始化串口*/	

	led_init();			/* 初始化led*/

	beep_init();		/* 初始化凤鸣器*/

	lcd_init();			/* 初始化LCD*/



	tftlcd_dev.forecolor = LCD_RED;

	while(1)			

	{	

		lcd_clear(backcolor[index]);

		delay_ms(1); 	  

		lcd_show_string(10, 40, 260, 32, 32,(char*)"Hello World"); 	

		lcd_show_string(10, 80, 240, 24, 24,(char*)"Hello World");

		lcd_show_string(10, 110, 240, 16, 16,(char*)"Hello World");      					 

		lcd_show_string(10, 130, 240, 12, 12,(char*)"2023/4/7");	      					 

	    index++;

		if(index == 10)

			index = 0;      

		state = !state;

		led_switch(LED0,state);





	}



	return 0;



}