## C/C++跨平台屏幕驱动之TFT ### 库地址 - [机械师/HW_Lib](https://gitee.com/JiXieShi_STARSS/hw_-lib) - [JiXieShi/HW_Lib: 自用嵌入式工具库 - HW_Lib - Starss-Git](https://gitea.starss.cc/JiXieShi/HW_Lib) ### 相关代码段 1. 接口定义 ```c /** * @brief 写寄存器数据函数指针类型 * @param reg: [输入] 寄存器地址 * @param pdata: [输入] 数据缓冲区指针 * @param ldata: [输入] 数据长度 * @return uint8_t 返回状态 * @example write_status = TFT_WRITE_REG(reg_addr, data_buffer, data_length); **/ typedef uint8_t (*TFT_WRITE_REG_t)(uint8_t reg, uint8_t *pdata, size_t ldata); /** * @brief 读寄存器数据函数指针类型 * @param reg: [输入] 寄存器地址 * @param pdata: [输出] 数据缓冲区指针 * @param ldata: [输入] 数据长度 * @return uint8_t 返回状态 * @example read_status = TFT_READ_REG(reg_addr, data_buffer, data_length); **/ typedef uint8_t (*TFT_READ_REG_t)(uint8_t reg, uint8_t *pdata, size_t ldata); /** * @brief 发送数据函数指针类型 * @param data: [输入] 数据缓冲区指针 * @param len: [输入] 数据长度 * @return uint8_t 返回状态 * @example send_status = TFT_SEND_DATA(data_buffer, data_length); **/ typedef uint8_t (*TFT_SEND_DATA_t)(uint8_t *data, size_t len); /** * @brief 接收数据函数指针类型 * @param data: [输出] 数据缓冲区指针 * @param len: [输入] 数据长度 * @return uint8_t 返回状态 * @example recv_status = TFT_RECV_DATA(data_buffer, data_length); **/ typedef uint8_t (*TFT_RECV_DATA_t)(uint8_t *data, size_t len); /** * @brief TFT背光控制函数指针类型 * @param data: [输入] 数据 * @return uint8_t 返回值 */ typedef uint8_t (*TFT_BLACKLIGHT_t)(uint8_t data); /** * @brief TFT延迟函数指针类型 * @param ms: [输入] 毫秒延迟 * @return uint8_t 返回值 */ typedef void (*TFT_DELAY_t)(uint32_t ms); ``` 2. 类型定义 ```c /** * @brief TFT状态枚举 */ typedef enum { TFT_ERROR,/**< 错误状态 */ TFT_IDLE, /**< 空闲状态 */ TFT_WRITE, /**< 写入状态 */ TFT_REFRESH, /**< 刷新状态 */ } TFT_STATE_T; typedef enum { LONGITUDINAL = 0x01U,/* 液晶屏纵向选择 */ LONGITUDINAL_180,/* 液晶屏纵向旋转 180° 方向选择 */ HORIZONTAL,/* 液晶屏横向选择 */ HORIZONTAL_180,/* 液晶屏横向旋转 180° 方向选择 */ } TFT_DIR_T; typedef union TFT_Color { uint16_t color; uint16_t u16; uint8_t u8[2]; } TFT_Color_t; /** * @brief TFT设备结构体 */ struct TFT_Dev { uint32_t id; /**< TFT设备ID */ uint8_t setxcmd; /**< 设置X坐标命令 */ uint8_t setycmd; /**< 设置Y坐标命令 */ uint8_t wgramcmd; /**< 写GRAM命令 */ TFT_DIR_T dir: 4; /**< 显示方向，占4位 */ TFT_STATE_T state: 4; /**< TFT状态，占4位 */ uint16_t width; /**< 显示宽度 */ uint16_t height; /**< 显示高度 */ TFT_WRITE_REG_t writeReg; /**< 写寄存器函数指针 */ TFT_READ_REG_t readReg; /**< 读寄存器函数指针 */ TFT_SEND_DATA_t sendData; /**< 发送数据函数指针 */ TFT_RECV_DATA_t recvData; /**< 接收数据函数指针 */ TFT_BLACKLIGHT_t blacklight; /**< TFT背光控制函数指针 */ TFT_DELAY_t delay; /**< TFT延迟函数指针类型 */ #if REFRESH_CALL_ENABLE TFT_REFRESH_t call; /**< TFT刷新函数指针，仅在REFRESH_CALL_ENABLE宏定义启用时有效 */ #endif }; ``` ### 平台示例 1. PC模拟 ```c //硬件实现区 uint8_t tft_writereg(uint8_t reg, uint8_t *pdata, size_t ldata) { uint8_t result; fill = false; Data16_t data16; if (reg == SETXCMD) { if (ldata >= 4) { data16.u8[1] = *pdata; pdata++; data16.u8[0] = *pdata; pdata++; xs = data16.u16; data16.u8[1] = *pdata; pdata++; data16.u8[0] = *pdata; xe = data16.u16; } else if (ldata >= 2) { data16.u8[1] = *pdata; pdata++; data16.u8[0] = *pdata; xs = data16.u16; } // LOGT("SETX","X_S:%d,X_E:%d,len:%d",xs,xe,ldata); } else if (reg == SETYCMD) { if (ldata >= 4) { data16.u8[1] = *pdata; pdata++; data16.u8[0] = *pdata; pdata++; ys = data16.u16; data16.u8[1] = *pdata; pdata++; data16.u8[0] = *pdata; ye = data16.u16; } else if (ldata >= 2) { data16.u8[1] = *pdata; pdata++; data16.u8[0] = *pdata; ys = data16.u16; } // LOGT("SETY","Y_S:%d,Y_E:%d,len:%d",ys,ye,ldata); } else if (reg == WGRAM_CMD) { fill = true; } if (result > 0) { result = -1; } else { result = 0; } return result; } //硬件实现 uint8_t tft_senddata(uint8_t *data, size_t len) { uint8_t result; uint32_t color[len / 2]; TFT_Color_t color_u; if (!fill || len == 0)return -1; if (len == 2) { color_u.u8[1] = *data; color_u.u8[0] = *data++; SIM_Color_DrawPiexl(&tft_display, (SIM_Color_t) RGB565_to_ARGB8888(color_u.u16, true), xs, ys); // LOGT("Piexl","color:%x,x:%d,y:%d,len:%d",color_u.u16,xs,ys,len); // SIM_Color_ImgFromBuffer(color,xs, ys, uint16_t width, 1) } else { for (int i = 0; i < len / 2; i++) { color_u.u8[1] = *data; data++; color_u.u8[0] = *data; data++; color[i] = RGB565_to_ARGB8888(color_u.u16, true); } SIM_Color_ImgFromBuffer(&tft_display, color, xs, ys, len / 2 - 1, 1); // SIM_Color_DrawHLineBuffer(color, xs, ys, len / 2); // LOGT("Img","x:%d,y:%d,len:%d",xs,ys,len); } if (result > 0) { result = -1; } else { result = 0; } return result; } int Test_tft(void *arg) { //设备信息预填充 demo_tft.width = 480;//实际如有支持不用填(如ST7735/7796) demo_tft.height = 320;//实际如有支持不用填(如ST7735/7796) demo_tft.wgramcmd = WGRAM_CMD;//实际如有支持不用填(如ST7735/7796) demo_tft.setycmd = SETYCMD;//实际如有支持不用填(如ST7735/7796) demo_tft.setxcmd = SETXCMD;//实际如有支持不用填(如ST7735/7796) demo_tft.writeReg = tft_writereg;//必须实现 demo_tft.sendData = tft_senddata;//必须实现 demo_tft.dir = HORIZONTAL;//必填 //模拟初始化 SIM_Display_Init("TFT", demo_tft.width, demo_tft.height, 0xFFFF, 0x0000, 2, &tft_display); TFT_Init(&demo_tft);//初始化 TFT_Color_t t; t.color = 0XFFFF; TFT_Fill(&demo_tft, 0, 0, demo_tft.width, demo_tft.height, t); t.color = 0XFFFF; TFT_SetColor(0xFFFF, 0x0000); TFT_Fill(&demo_tft, 0, 0, demo_tft.width, demo_tft.height, t); TFT_SetColor(0x7D7C, 0x0000); TFT_DrawRect(&demo_tft, 0, 0, 50, 50); t.color = 0X01CF; TFT_Fill(&demo_tft, 1, 1, 49, 49, t); TFT_SetColor(0x7D7C, 0x0000); TFT_ShowCHString(&demo_tft, 0, 60, "星海科技机械师", 1); TFT_DrawCircle(&demo_tft, 25, 25, 15); TFT_DrawRoundedRect(&demo_tft,200,0,100,30,8); TFT_DrawArc(&demo_tft,200,50,30,0,360); TFT_DrawCross(&demo_tft, 25, 25, 10); TFT_DrawXCross(&demo_tft, 25, 25, 10); TFT_ShowString(&demo_tft, 60, 20, "JiXieShi", 16, 1); TFT_ShowString(&demo_tft, 0, 160, "abcdefghigklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ<>(){}[]\\/?.,;:'\"!@#$%^&*-=_+~|", 16, 1); for (float p = 0; p < 1; p += 0.001) { TFT_ShowBar(&demo_tft, 0, 100, demo_tft.width, 24, p); TFT_ShowBar(&demo_tft, 0, 125, demo_tft.width, 16, p); TFT_ShowBar(&demo_tft, 0, 142, demo_tft.width, 12, p); TFT_ShowBar(&demo_tft, 0, 155, demo_tft.width, 3, p); } SIM_Display_STOP(&tft_display); return 0; } ``` 效果如下![image-20241112223044103](https://s2.loli.net/2024/11/12/S6fBq8baWniX5Yy.png) 2. STM 双屏异显 ```c #define TFT_RS_SET HAL_GPIO_WritePin(TFT_DC_GPIO_Port,TFT_DC_Pin,GPIO_PIN_SET)//PC4 #define TFT_RS_RESET HAL_GPIO_WritePin(TFT_DC_GPIO_Port,TFT_DC_Pin,GPIO_PIN_RESET) //LCD_CS #define TFT_CS_SET HAL_GPIO_WritePin(TFT_CS_GPIO_Port,TFT_CS_Pin,GPIO_PIN_SET) #define TFT_CS_RESET HAL_GPIO_WritePin(TFT_CS_GPIO_Port,TFT_CS_Pin,GPIO_PIN_RESET) TFT_T st7735; TFT_T st7796; uint8_t tft_writereg(uint8_t reg,uint8_t* pdata,size_t ldata){ uint8_t result; TFT_CS_RESET; TFT_RS_RESET; result = HAL_SPI_Transmit(&hspi4,®,1,100); TFT_RS_SET; if(ldata > 0) result += HAL_SPI_Transmit(&hspi4,pdata,ldata,500); TFT_CS_SET; if(result>0){ result = -1;} else{ result = 0;} return result; } uint8_t tft_readreg(uint8_t reg,uint8_t* pdata,size_t ldata){ uint8_t result; TFT_CS_RESET; TFT_RS_RESET; result = HAL_SPI_Transmit(&hspi4,®,1,100); TFT_RS_SET; result += HAL_SPI_Receive(&hspi4,pdata,ldata,500); TFT_CS_SET; if(result>0){ result = -1;} else{ result = 0;} return result; } uint8_t tft_readdata(uint8_t *data,size_t len){ uint8_t result; TFT_CS_RESET; //TFT_RS_SET; result = HAL_SPI_Receive(&hspi4,data,len,500); TFT_CS_SET; if(result>0){ result = -1;} else{ result = 0;} return result; } uint8_t tft_senddata(uint8_t *data,size_t len){ uint8_t result; TFT_CS_RESET; //TFT_RS_SET; result =HAL_SPI_Transmit(&hspi4,data,len,100); TFT_CS_SET; if(result>0){ result = -1;} else{ result = 0;} return result; } uint8_t lcd_writereg(uint8_t reg,uint8_t* pdata,size_t ldata){ uint8_t result; LCD_CS_RESET; LCD_DC_RESET; result = HAL_SPI_Transmit(&hspi6,®,1,100); LCD_DC_SET; if(ldata > 0) result += HAL_SPI_Transmit(&hspi6,pdata,ldata,500); LCD_CS_SET; if(result>0){ result = -1;} else{ result = 0;} return result; } uint8_t lcd_readreg(uint8_t reg,uint8_t* pdata,size_t ldata){ uint8_t result; LCD_CS_RESET; LCD_DC_RESET; result = HAL_SPI_Transmit(&hspi6,®,1,100); LCD_DC_SET; result += HAL_SPI_Receive(&hspi6,pdata,ldata,500); LCD_CS_SET; if(result>0){ result = -1;} else{ result = 0;} return result; } uint8_t lcd_readdata(uint8_t *data,size_t len){ uint8_t result; LCD_CS_RESET; //LCD_DC_SET; result = HAL_SPI_Receive(&hspi6,data,len,500); LCD_CS_SET; if(result>0){ result = -1;} else{ result = 0;} return result; } uint8_t lcd_senddata(uint8_t *data,size_t len){ uint8_t result; LCD_CS_RESET; //LCD_DC_SET; result =HAL_SPI_Transmit(&hspi6,data,len,100); LCD_CS_SET; if(result>0){ result = -1;} else{ result = 0;} return result; } int main(){ st7735.sendData=tft_senddata; st7735.recvData=tft_readdata; st7735.writeReg=tft_writereg; st7735.readReg=tft_readreg; st7735.dir=LONGITUDINAL; st7735.delay=HAL_Delay; st7735.id=TFT_ST7735; // st7796.sendData=lcd_senddata; st7796.recvData=lcd_readdata; st7796.writeReg=lcd_writereg; st7796.readReg=lcd_readreg; st7796.dir=LONGITUDINAL; st7796.delay=HAL_Delay; st7796.id=TFT_ST7796; // TFT_Color_t t;t.color=0X0000; TFT_Init(&st7735); TFT_Init(&st7796); t.color=0XFFFF; TFT_SetColor(0xFFFF,0x0000); TFT_DrawRect(&st7735,0,0,50,50); TFT_Fill(&st7735,0,0,st7735.width,st7735.height,t); TFT_Fill(&st7796,0,0,st7796.width,st7796.height,t); TFT_SetColor(0x07E0,0x0000); TFT_DrawRect(&st7735,0,0,50,50); TFT_DrawRect(&st7796,0,0,50,50); t.color=0X01CF; TFT_Fill(&st7735,1,1,49,49,t); TFT_Fill(&st7796,1,1,49,49,t); TFT_SetColor(0x7D7C,0x0000); TFT_ShowCHString(&st7735,0,60,"星海科技机械师",1); TFT_ShowCHString(&st7796,0,60,"星海科技机械师",1); TFT_DrawCircle(&st7735,25,25,10); TFT_DrawCircle(&st796,25,25,10); TFT_DrawCross(&st7735,25,25,10); TFT_DrawCross(&st7796,25,25,10); TFT_ShowString(&st7735, 60, 20, "jxs", 16,1); TFT_ShowString(&st776, 60, 20, "jxs", 16,1); TFT_ShowString(&st7735, 0, 160, "abcdefghigklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ<>(){}[]\\/?.,;:'\"!@#$%^&*-=_+~|", 16,1); TFT_ShowString(&st7796, 0, 160, "abcdefghigklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ<>(){}[]\\/?.,;:'\"!@#$%^&*-=_+~|", 16,1); float p=0; TFT_ShowBar(&st7735,0,100,st7735.width,5,p); } ``` 效果如下![Cache_4b949c54e6743afd](https://s2.loli.net/2024/11/12/IC2Kf6dvS7mRjyB.jpg)

C跨平台驱动之TFT