本帖最后由 rock00210 于 2022-9-9 07:46 编辑
凌鸥创芯车规级LKS32AT085开发板测评—移植1.8寸TFT屏幕程序
首先非常感谢21ic和凌鸥创芯，很荣幸能参加此次活动并参与评测。
本次主要做MCU驱动1.8寸液晶，液晶驱动芯片为ST7735，此屏幕为SPI总线方式，共8个引脚如下图：
GND---0V，VCC---3.3V，，SCL---P1.4,SDA---P1.5，RES-----P1.6，DC-----P1.7，CS-----P1.8，BL-----P1.9。
SCL为SPI时钟，SDA为SPI数据，RES为SPI复位，DC为SPI指令和数据选择端，CS为片选，BL为背光，本次采用GPIO模拟的方式实现。关于SPI驱动的时序，请自行研究，在此不做赘述，TFT驱动程序如下：
//液晶IO初始化配置
voidLCD_GPIO_Init(void)
{
GPIO_InitTypeDefGPIO_InitStruct;
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIO1, &GPIO_InitStruct);
}
//向SPI总线传输一个8位数据
void SPI_WriteData(u8 Data)
{
unsigned char i=0;
for(i=8;i>0;i--)
{
if(Data&0x80)//输出数据
GPIO_SetBits(GPIO1, GPIO_Pin_5);
elseGPIO_ResetBits(GPIO1, GPIO_Pin_5);
GPIO_ResetBits(GPIO1, GPIO_Pin_4);
GPIO_SetBits(GPIO1, GPIO_Pin_4);
Data<<=1;
}
}
//向液晶屏写一个8位指令
voidLcd_WriteIndex(u8 Index)
{
//SPI 写命令时序开始
GPIO_ResetBits(GPIO1, GPIO_Pin_8);
GPIO_ResetBits(GPIO1, GPIO_Pin_7);
SPI_WriteData(Index);
GPIO_SetBits(GPIO1, GPIO_Pin_8);
}
//向液晶屏写一个8位数据
voidLcd_WriteData(u8 Data)
{
GPIO_ResetBits(GPIO1, GPIO_Pin_8);
GPIO_SetBits(GPIO1, GPIO_Pin_7);
SPI_WriteData(Data);
GPIO_SetBits(GPIO1, GPIO_Pin_8);
}
//向液晶屏写一个16位数据
void LCD_WriteData_16Bit(u16 Data)
{
GPIO_ResetBits(GPIO1, GPIO_Pin_8);
GPIO_SetBits(GPIO1, GPIO_Pin_7);
SPI_WriteData(Data>>8); //写入高8位数据
SPI_WriteData(Data); //写入低8位数据
GPIO_SetBits(GPIO1, GPIO_Pin_8);
}
voidLcd_WriteReg(u8 Index,u8 Data)
{
Lcd_WriteIndex(Index);
Lcd_WriteData(Data);
}
voidLcd_Reset(void)
{
GPIO_ResetBits(GPIO1, GPIO_Pin_6);
delay_ms(100);
GPIO_SetBits(GPIO1, GPIO_Pin_6);
delay_ms(50);
}
//LCD Init For 1.8Inch LCD Panel with ST7735R.
voidLcd_Init(void)
{
LCD_GPIO_Init();
Lcd_Reset(); //Reset before LCD Init.
//LCD Init For 1.44Inch LCD Panel with ST7735R.
Lcd_WriteIndex(0x11);//Sleep exit
delay_ms (120);
//ST7735R Frame Rate
Lcd_WriteIndex(0xB1);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB2);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB3);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB4); //Column inversion
Lcd_WriteData(0x07);
//ST7735R Power Sequence
Lcd_WriteIndex(0xC0);
Lcd_WriteData(0xA2);
Lcd_WriteData(0x02);
Lcd_WriteData(0x84);
Lcd_WriteIndex(0xC1);
Lcd_WriteData(0xC5);
Lcd_WriteIndex(0xC2);
Lcd_WriteData(0x0A);
Lcd_WriteData(0x00);
Lcd_WriteIndex(0xC3);
Lcd_WriteData(0x8A);
Lcd_WriteData(0x2A);
Lcd_WriteIndex(0xC4);
Lcd_WriteData(0x8A);
Lcd_WriteData(0xEE);
Lcd_WriteIndex(0xC5); //VCOM
Lcd_WriteData(0x0E);
Lcd_WriteIndex(0x36); //MX, MY, RGB mode
Lcd_WriteData(0xC0);
//ST7735R Gamma Sequence
Lcd_WriteIndex(0xe0);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x1a);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x18);
Lcd_WriteData(0x2f);
Lcd_WriteData(0x28);
Lcd_WriteData(0x20);
Lcd_WriteData(0x22);
Lcd_WriteData(0x1f);
Lcd_WriteData(0x1b);
Lcd_WriteData(0x23);
Lcd_WriteData(0x37);
Lcd_WriteData(0x00);
Lcd_WriteData(0x07);
Lcd_WriteData(0x02);
Lcd_WriteData(0x10);
Lcd_WriteIndex(0xe1);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x1b);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x17);
Lcd_WriteData(0x33);
Lcd_WriteData(0x2c);
Lcd_WriteData(0x29);
Lcd_WriteData(0x2e);
Lcd_WriteData(0x30);
Lcd_WriteData(0x30);
Lcd_WriteData(0x39);
Lcd_WriteData(0x3f);
Lcd_WriteData(0x00);
Lcd_WriteData(0x07);
Lcd_WriteData(0x03);
Lcd_WriteData(0x10);
Lcd_WriteIndex(0x2a);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00);
Lcd_WriteData(0x7f);
Lcd_WriteIndex(0x2b);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00);
Lcd_WriteData(0x9f);
Lcd_WriteIndex(0xF0); //Enable test command
Lcd_WriteData(0x01);
Lcd_WriteIndex(0xF6); //Disable ram power save mode
Lcd_WriteData(0x00);
Lcd_WriteIndex(0x3A); //65k mode
Lcd_WriteData(0x05);
Lcd_WriteIndex(0x29);//Display on
}
/*************************************************
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
返回值：无
*************************************************/
voidLcd_SetRegion(u16 x_start,u16 y_start,u16 x_end,u16 y_end)
{
Lcd_WriteIndex(0x2a);
Lcd_WriteData(0x00);
Lcd_WriteData(x_start);//Lcd_WriteData(x_start+2);
Lcd_WriteData(0x00);
Lcd_WriteData(x_end+2);
Lcd_WriteIndex(0x2b);
Lcd_WriteData(0x00);
Lcd_WriteData(y_start+0);
Lcd_WriteData(0x00);
Lcd_WriteData(y_end+1);
Lcd_WriteIndex(0x2c);
}
/*************************************************
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
*************************************************/
voidLcd_SetXY(u16 x,u16 y)
{
Lcd_SetRegion(x,y,x,y);
}
/*************************************************
函数名：LCD_DrawPoint
功能：画一个点
入口参数：无
返回值：无
*************************************************/
voidGui_DrawPoint(u16 x,u16 y,u16 Data)
{
Lcd_SetRegion(x,y,x+1,y+1);
LCD_WriteData_16Bit(Data);
}
/*****************************************
函数功能：读TFT某一点的颜色
出口参数：color 点颜色值
******************************************/
unsignedintLcd_ReadPoint(u16 x,u16 y)
{
unsignedint Data;
Lcd_SetXY(x,y);
//Lcd_ReadData();//丢掉无用字节
//Data=Lcd_ReadData();
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
*************************************************/
voidLcd_Clear(u16 Color)
{
unsignedinti,m;
Lcd_SetRegion(0,0,X_MAX_PIXEL-1,Y_MAX_PIXEL-1);
Lcd_WriteIndex(0x2C);
for(i=0;i<X_MAX_PIXEL;i++)
for(m=0;m<Y_MAX_PIXEL;m++)
{
LCD_WriteData_16Bit(Color);
}
}
显示状态如下：
如果想显示其他汉字或者图片，需要通过取模软件，导出16进制，生成数组进行显示。
总的来说，功率板和MCU板做的不错，另外此功率版还能兼容其他型号的MCU，具体可以和凌鸥创芯联系确认下，官方提供的例程和库函数也比较丰富，容易上手。官网的资料相对来说也比较丰富，只是分类做的不是太好，希望厂家以后能改进。
|
楼主
标题置顶
标题高亮
;){kind=link}