#include "sys.h" #include "Lcd_Driver.h" #include "LCD_Config.h" #include "delay.h" //嵌入式开发网 //淘宝网站：http://mcudev.taobao.com //本测试程序使用的是模拟SPI接口驱动 //可自由更改接口IO配置，使用任意最少4 IO即可完成本款液晶驱动显示 /****************************************************************************** 接口定义在Lcd_Driver.h内定义，请根据接线修改并修改相应IO初始化LCD_GPIO_Init() #define LCD_BLK //PB1 //背光控制 #define LCD_RS //PC5 //命令数据切换 #define LCD_CS //PB12 //片选 #define LCD_SDO/RST //PB14 //复位 #define LCD_SCL //PB13 //时钟线 #define LCD_SDA //PB15 //数据线 *******************************************************************************/ //液晶IO初始化配置 void LCD_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC ,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 |GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 |GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//普通输出模式 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//普通输出模式 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_SetBits(GPIOB,GPIO_Pin_14);//MISO引脚输出为高 LCD_BLK_SET;//开启背光 LCD_BLK_CLR;//关闭背光 LCD_BLK_SET;//开启背光 } /**************************************************************************** * 名 称：void SPIv_WriteData(u8 Data) * 功 能：STM32_模拟SPI写一个字节数据底层函数 * 入口参数：Data * 出口参数：无 * 说 明：STM32_模拟SPI读写一个字节数据底层函数 ****************************************************************************/ void SPI_WriteData(u8 Data) { unsigned char i=0; for(i=8;i>0;i--) { if(Data&0x80) LCD_SDA_SET; //输出数据 else LCD_SDA_CLR; LCD_SCL_CLR; LCD_SCL_SET; Data<<=1; } } /**************************************************************************** * 名 称：void Lcd_WriteIndex(u8 idx) * 功 能：写 ST7735S 控制器寄存器地址 * 入口参数：idx 寄存器地址 * 出口参数：无 * 说 明：调用前需先选中控制器，内部函数 * 调用方法：Lcd_WriteIndex(0x00); ****************************************************************************/ void Lcd_WriteIndex(u8 Index) { //SPI 写命令时序开始 LCD_CS_CLR; LCD_RS_CLR; //写入命令 SPI_WriteData(Index); LCD_CS_SET; } /**************************************************************************** * 名 称：void Lcd_WriteData(u8 dat) * 功 能：写 ST7735S 寄存器数据 * 入口参数：dat 寄存器数据 * 出口参数：无 * 说 明：向控制器指定地址写入数据，调用前需先写寄存器地址，内部函数 * 调用方法：Lcd_WriteData(0x30) ****************************************************************************/ void Lcd_WriteData(u8 Data) { LCD_CS_CLR; LCD_RS_SET; //写入数据 SPI_WriteData(Data); LCD_CS_SET; } //写寄存器函数 void Lcd_WriteReg(u8 Index,u8 Data) { Lcd_WriteIndex(Index); Lcd_WriteData(Data); } //向液晶屏写一个16位数据 void LCD_WriteData_16Bit(uint16_t Data) { LCD_CS_CLR; LCD_RS_SET; SPI_WriteData(Data>>8); //写入高8位数据 SPI_WriteData(Data); //写入低8位数据 LCD_CS_SET; } //液晶屏复位函数 void Lcd_Reset(void) { LCD_RST_CLR; delay_ms(100); LCD_RST_SET; delay_ms(100); } //管理LCD重要参数 //默认为竖屏 _lcd_dev lcddev; //设置LCD参数 //方便进行横竖屏模式切换 void LCD_SetParam(void) { lcddev.wramcmd=0x2C; #if USE_HORIZONTAL==1 //使用横屏 lcddev.dir=1;//横屏 lcddev.width=160; lcddev.height=128; lcddev.setxcmd=0x2A; lcddev.setycmd=0x2B; Lcd_WriteReg(0x36,0xA0); #else//竖屏 lcddev.dir=0;//竖屏 lcddev.width=128; lcddev.height=160; lcddev.setxcmd=0x2A; lcddev.setycmd=0x2B; Lcd_WriteReg(0x36,0xC0); #endif } /************************************************* 函数名：LCD_Set_Region 功能：设置lcd显示区域，在此区域写点数据自动换行 入口参数：xy起点和终点,Y_IncMode表示先自增y再自增x 返回值：无 *************************************************/ void Lcd_SetRegion(u16 x_start,u16 y_start,u16 x_end,u16 y_end) { #if USE_HORIZONTAL==1 //使用横屏 Lcd_WriteIndex(0x2a); Lcd_WriteData(0x00); Lcd_WriteData(x_start); Lcd_WriteData(0x00); Lcd_WriteData(x_end); Lcd_WriteIndex(0x2b); Lcd_WriteData(0x00); Lcd_WriteData(y_start); Lcd_WriteData(0x00); Lcd_WriteData(y_end); #else Lcd_WriteIndex(0x2a); Lcd_WriteData(0x00); Lcd_WriteData(x_start); Lcd_WriteData(0x00); Lcd_WriteData(x_end); Lcd_WriteIndex(0x2b); Lcd_WriteData(0x00); Lcd_WriteData(y_start); Lcd_WriteData(0x00); Lcd_WriteData(y_end); #endif Lcd_WriteIndex(0x2c); //开始写入GRAM } /************************************************* 函数名：LCD_Set_XY 功能：设置lcd显示起始点 入口参数：xy坐标 返回值：无 *************************************************/ void Lcd_SetXY(u16 x,u16 y) { //Lcd_SetRegion(x,y,x,y); #if USE_HORIZONTAL==1 //使用横屏 Lcd_SetRegion(x+1,y+2,x+1,y+2); #else Lcd_SetRegion(x+2,y+1,x+2,y+1); #endif } /************************************************* 函数名：LCD_DrawPoint 功能：画一个点 入口参数：无 返回值：无 *************************************************/ void Gui_DrawPoint(u16 x,u16 y,u16 Data) { //Lcd_SetRegion(x,y,x+1,y+1); #if USE_HORIZONTAL==1 //使用横屏 Lcd_SetRegion(x+1,y+2,x+2,y+3); #else Lcd_SetRegion(x+2,y+1,x+3,y+2); #endif Lcd_WriteData(Data>>8); Lcd_WriteData(Data); } /***************************************** 函数功能：读TFT某一点的颜色 出口参数：color 点颜色值 ******************************************/ //unsigned int Lcd_ReadPoint(u16 x,u16 y) //{ // unsigned int Data; // Lcd_SetXY(x,y); // Lcd_WriteData(Data); // return Data; //} /************************************************* 函数名：Lcd_Clear 功能：全屏清屏函数 入口参数：填充颜色COLOR 返回值：无 *************************************************/ void Lcd_Clear(u16 Color) { unsigned int i,m; #if USE_HORIZONTAL==1 //使用横屏 //Lcd_SetRegion(2,1,X_MAX_PIXEL+1,Y_MAX_PIXEL); Lcd_SetRegion(1,2,X_MAX_PIXEL,Y_MAX_PIXEL+1); Lcd_WriteIndex(0x2C); for(i=0;i>8); Lcd_WriteData(Color); } #else Lcd_SetRegion(2,1,X_MAX_PIXEL+1,Y_MAX_PIXEL); Lcd_WriteIndex(0x2C); for(i=0;i>8); Lcd_WriteData(Color); } #endif } void Lcd_Init(void) { LCD_GPIO_Init();//使用模拟SPI 初始化IO接口 Lcd_Reset(); //复位液晶屏 Lcd_WriteIndex(0x11);//Sleep exit delay_ms (200); Lcd_WriteIndex(0xB1); Lcd_WriteData(0x05); Lcd_WriteData(0x3C); Lcd_WriteData(0x3C); Lcd_WriteIndex(0xB2); Lcd_WriteData(0x05); Lcd_WriteData(0x3C); Lcd_WriteData(0x3C); Lcd_WriteIndex(0xB3); Lcd_WriteData(0x05); Lcd_WriteData(0x3C); Lcd_WriteData(0x3C); Lcd_WriteData(0x05); Lcd_WriteData(0x3C); Lcd_WriteData(0x3C); //------------------------------------End ST7735S Frame Rate---------------------------------// Lcd_WriteIndex(0xB4); //Dot inversion Lcd_WriteData(0x03); //------------------------------------ST7735S Power Sequence---------------------------------// Lcd_WriteIndex(0xC0); Lcd_WriteData(0x28); Lcd_WriteData(0x08); Lcd_WriteData(0x04); Lcd_WriteIndex(0xC1); Lcd_WriteData(0XC0); Lcd_WriteIndex(0xC2); Lcd_WriteData(0x0D); Lcd_WriteData(0x00); Lcd_WriteIndex(0xC3); Lcd_WriteData(0x8D); Lcd_WriteData(0x2A); Lcd_WriteIndex(0xC4); Lcd_WriteData(0x8D); Lcd_WriteData(0xEE); //---------------------------------End ST7735S Power Sequence-------------------------------------// Lcd_WriteIndex(0xC5); //VCOM Lcd_WriteData(0x1A); Lcd_WriteIndex(0x36); //MX, MY, RGB mode Lcd_WriteData(0xC0); //------------------------------------ST7735S Gamma Sequence---------------------------------// Lcd_WriteIndex(0xE0); Lcd_WriteData(0x04); Lcd_WriteData(0x22); Lcd_WriteData(0x07); Lcd_WriteData(0x0A); Lcd_WriteData(0x2E); Lcd_WriteData(0x30); Lcd_WriteData(0x25); Lcd_WriteData(0x2A); Lcd_WriteData(0x28); Lcd_WriteData(0x26); Lcd_WriteData(0x2E); Lcd_WriteData(0x3A); Lcd_WriteData(0x00); Lcd_WriteData(0x01); Lcd_WriteData(0x03); Lcd_WriteData(0x13); Lcd_WriteIndex(0xE1); Lcd_WriteData(0x04); Lcd_WriteData(0x16); Lcd_WriteData(0x06); Lcd_WriteData(0x0D); Lcd_WriteData(0x2D); Lcd_WriteData(0x26); Lcd_WriteData(0x23); Lcd_WriteData(0x27); Lcd_WriteData(0x27); Lcd_WriteData(0x25); Lcd_WriteData(0x2D); Lcd_WriteData(0x3B); Lcd_WriteData(0x00); Lcd_WriteData(0x01); Lcd_WriteData(0x04); Lcd_WriteData(0x13); //------------------------------------End ST7735S Gamma Sequence-----------------------------// Lcd_WriteIndex(0x3A); //65k mode Lcd_WriteData(0x05); Lcd_WriteIndex(0x29); //Display on LCD_SetParam();//设置LCD参数 }