【经验分享】STM32驱动SPI接口的ST7798

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STMCU小助手发布时间：2022-4-23 16:44

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文章简介:	STM32驱动SPI接口的ST7798

lcd.c

void lcd_init()
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE );//PORTA时钟使能
RCC_APB2PeriphClockCmd( RCC_APB2Periph_SPI1, ENABLE );//SPI1时钟使能
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_8|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_4|GPIO_Pin_8|GPIO_Pin_15);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_3);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6| GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA
GPIO_SetBits(GPIOA,GPIO_Pin_5 | GPIO_Pin_6| GPIO_Pin_7); //PB13/14/15上拉
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //设置SPI单向或者双向的数据模式:SPI设置为双线双向全双工
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //设置SPI工作模式:设置为主SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //设置SPI的数据大小:SPI发送接收8位帧结构
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //串行同步时钟的空闲状态为高电平
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //串行同步时钟的第二个跳变沿（上升或下降）数据被采样
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS信号由硬件（NSS管脚）还是软件（使用SSI位）管理:内部NSS信号有SSI位控制
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //定义波特率预分频的值:波特率预分频值为256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //指定数据传输从MSB位还是LSB位开始:数据传输从MSB位开始
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC值计算的多项式
SPI_Init(SPI1, &SPI_InitStructure); //根据SPI_InitStruct中指定的参数初始化外设SPIx寄存器
SPI_Cmd(SPI1, ENABLE); //使能SPI外设
// lcd_read_write_byte(0xff);//启动传输
lcd_rst=1;
delay_ms(120);
lcd_rst=0;
delay_ms(120);
lcd_rst=1;
delay_ms(120);
/* Sleep Out */
lcd_write_cmd(0x11);
/* wait for power stability */
delay_ms(120);
lcd_write_cmd(0x36);
lcd_write_data(0x00);
lcd_write_cmd(0x3a);
lcd_write_data(0x05);
//--------------------------------ST7789V Frame rate setting----------------------------------//
lcd_write_cmd(0xb2);
lcd_write_data(0x0c);
lcd_write_data(0x0c);
lcd_write_data(0x00);
lcd_write_data(0x33);
lcd_write_data(0x33);
lcd_write_cmd(0xb7);
lcd_write_data(0x35);
//---------------------------------ST7789V Power setting--------------------------------------//
lcd_write_cmd(0xbb);
lcd_write_data(0x1c);
lcd_write_cmd(0xc0);
lcd_write_data(0x2c);
lcd_write_cmd(0xc2);
lcd_write_data(0x01);
lcd_write_cmd(0xc3);
lcd_write_data(0x0b);
lcd_write_cmd(0xc4);
lcd_write_data(0x20);
lcd_write_cmd(0xc6);
lcd_write_data(0x0f);
lcd_write_cmd(0xd0);
lcd_write_data(0xa4);
lcd_write_data(0xa1);
//--------------------------------ST7789V gamma setting---------------------------------------//
lcd_write_cmd(0xe0);
lcd_write_data(0xd0);
lcd_write_data(0x00);
lcd_write_data(0x03);
lcd_write_data(0x09);
lcd_write_data(0x13);
lcd_write_data(0x1c);
lcd_write_data(0x3a);
lcd_write_data(0x55);
lcd_write_data(0x48);
lcd_write_data(0x18);
lcd_write_data(0x12);
lcd_write_data(0x0e);
lcd_write_data(0x19);
lcd_write_data(0x1e);
lcd_write_cmd(0xe1);
lcd_write_data(0xd0);
lcd_write_data(0x00);
lcd_write_data(0x03);
lcd_write_data(0x09);
lcd_write_data(0x05);
lcd_write_data(0x25);
lcd_write_data(0x3a);
lcd_write_data(0x55);
lcd_write_data(0x50);
lcd_write_data(0x3d);
lcd_write_data(0x1c);
lcd_write_data(0x1d);
lcd_write_data(0x1d);
lcd_write_data(0x1e);
lcd_write_cmd(0x29);
lcd_address_set(0, 0, LCD_Width - 1, LCD_Height - 1);
lcd_set_speed(SPI_BaudRatePrescaler_2);
open_lcd();
}
//SPI 速度设置函数
//SpeedSet:
//SPI_BaudRatePrescaler_2 2分频
//SPI_BaudRatePrescaler_8 8分频
//SPI_BaudRatePrescaler_16 16分频
//SPI_BaudRatePrescaler_256 256分频
void lcd_set_speed(u8 SPI_BaudRatePrescaler)
{
assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));
SPI1->CR1&=0XFFC7;
SPI1->CR1|=SPI_BaudRatePrescaler; //设置SPI1速度
SPI_Cmd(SPI1,ENABLE);
}
//SPIx 读写一个字节
//TxData:要写入的字节
//返回值:读取到的字节
u8 lcd_read_write_byte(u8 TxData)
{
u8 retry=0;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET) //检查指定的SPI标志位设置与否:发送缓存空标志位
{
retry++;
if(retry>200)return 0;
}
SPI_I2S_SendData(SPI1, TxData); //通过外设SPIx发送一个数据
retry=0;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET) //检查指定的SPI标志位设置与否:接受缓存非空标志位
{
retry++;
if(retry>200)return 0;
}
return SPI_I2S_ReceiveData(SPI1); //返回通过SPIx最近接收的数据
}
/**
* @brief 写命令到LCD
*
* @param cmd 需要发送的命令
*
* @return void
*/
void lcd_write_cmd(u8 cmd)
{
lcd_dc=0;
lcd_cs=0;
lcd_read_write_byte(cmd);
lcd_cs=1;
}
/**
* @brief 写数据到LCD
*
* @param cmd 需要发送的数据
*
* @return void
*/
void lcd_write_data(u8 data)
{
lcd_dc=1;
lcd_cs=0;
lcd_read_write_byte(data);
lcd_cs=1;
}
/**
* @brief 写半个字的数据到LCD
*
* @param cmd 需要发送的数据
*
* @return void
*/
void lcd_write_halfword(const u16 da)
{
u8 data[2] = {0},i=0;
data[0] = da >> 8;
data[1] = da;
lcd_dc=1;
lcd_cs=0;
for(i=0;i<2;i++)
{
lcd_read_write_byte(data<i>);
}
lcd_cs=1;
}
/**
* 设置数据写入LCD缓存区域
*
* @param x1,y1 起点坐标
* @param x2,y2 终点坐标
*
* @return void
*/
void lcd_address_set(u16 x1, u16 y1, u16 x2, u16 y2)
{
lcd_write_cmd(0x2a);
lcd_write_data(x1 >> 8);
lcd_write_data(x1);
lcd_write_data(x2 >> 8);
lcd_write_data(x2);
lcd_write_cmd(0x2b);
lcd_write_data(y1 >> 8);
lcd_write_data(y1);
lcd_write_data(y2 >> 8);
lcd_write_data(y2);
lcd_write_cmd(0x2C);
}
/**
* 以一种颜色清空LCD屏
*
* @param color 清屏颜色
*
* @return void
*/
void lcd_clear(u16 color)
{
unsigned int i;
u8 data[2] = {0};
data[0] = color >> 8;
data[1] = color;
lcd_address_set(0, 0, LCD_Width - 1, LCD_Height - 1);
lcd_dc=1;
lcd_cs=0;
for(i = 0; i < (LCD_Width*LCD_Height); i++)
{
lcd_read_write_byte(data[0]);
lcd_read_write_byte(data[1]);
}
lcd_cs=0;
}
/**
* 画点函数
*
* @param x,y 画点坐标
*
* @return void
*/
void lcd_draw_point(u16 x, u16 y,u16 pointColor)
{
lcd_address_set(x, y, x, y);
lcd_write_halfword(pointColor);
}
/**
* @brief 画一个圆
*
* @param x0,y0 圆心坐标
* @param r 圆半径
*
* @return void
*/
void lcd_draw_circle(u16 x0, u16 y0, u8 r,u16 pointColor)
{
int a, b;
int di;
a = 0;
b = r;
di = 3 - (r << 1);
while(a <= b)
{
lcd_draw_point(x0 - b, y0 - a,pointColor);
lcd_draw_point(x0 + b, y0 - a,pointColor);
lcd_draw_point(x0 - a, y0 + b,pointColor);
lcd_draw_point(x0 - b, y0 - a,pointColor);
lcd_draw_point(x0 - a, y0 - b,pointColor);
lcd_draw_point(x0 + b, y0 + a,pointColor);
lcd_draw_point(x0 + a, y0 - b,pointColor);
lcd_draw_point(x0 + a, y0 + b,pointColor);
lcd_draw_point(x0 - b, y0 + a,pointColor);
a++;
if(di < 0)di += 4 * a + 6;
else
{
di += 10 + 4 * (a - b);
b--;
}
lcd_draw_point(x0 + a, y0 + b,pointColor);
}
}
/**
* @brief 显示一个ASCII码字符
*
* @param x,y 显示起始坐标
* @param chr 需要显示的字符
* @param size 字体大小(支持16/24/32号字体)
*
* @return void
*/
void lcd_show_char(u16 x, u16 y, char chr, u8 size,u16 pointColor,u16 backColor)
{
u8 temp, t1, t;
u8 csize; //得到字体一个字符对应点阵集所占的字节数
u16 colortemp;
u8 sta;
chr = chr - ' '; //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）
if((x > (LCD_Width - size / 2)) || (y > (LCD_Height - size))) return;
lcd_address_set(x, y, x + size / 2 - 1, y + size - 1);//(x,y,x+8-1,y+16-1)
if((size == 16) || (size == 32) ) //16和32号字体
{
csize = (size / 8 + ((size % 8) ? 1 : 0)) * (size / 2);
for(t = 0; t < csize; t++)
{
if(size == 16)temp = asc2_1608[chr][t]; //调用1608字体
else if(size == 32)temp = asc2_3216[chr][t]; //调用3216字体
else return; //没有的字库
for(t1 = 0; t1 < 8; t1++)
{
if(temp & 0x80) colortemp = pointColor;
else colortemp = backColor;
lcd_write_halfword(colortemp);
temp <<= 1;
}
}
}
else if (size == 12) //12号字体
{
csize = (size / 8 + ((size % 8) ? 1 : 0)) * (size / 2);
for(t = 0; t < csize; t++)
{
temp = asc2_1206[chr][t];
for(t1 = 0; t1 < 6; t1++)
{
if(temp & 0x80) colortemp = pointColor;
else colortemp = backColor;
lcd_write_halfword(colortemp);
temp <<= 1;
}
}
}
else if(size == 24) //24号字体
{
csize = (size * 16) / 8;
for(t = 0; t < csize; t++)
{
temp = asc2_2412[chr][t];
if(t % 2 == 0)sta = 8;
else sta = 4;
for(t1 = 0; t1 < sta; t1++)
{
if(temp & 0x80) colortemp = pointColor;
else colortemp = backColor;
lcd_write_halfword(colortemp);
temp <<= 1;
}
}
}
}
/**
* @brief 显示字符串
*
* @param x,y 起点坐标
* @param width 字符显示区域宽度
* @param height 字符显示区域高度
* @param size 字体大小
* @param p 字符串起始地址
*
* @return void
*/
void lcd_show_string(u16 x, u16 y, u16 width, u16 height, u8 size, char *p,u16 pointColor,u16 backColor)
{
u8 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_show_char(x, y, *p, size,pointColor,backColor);
x += size / 2;
p++;
}
}
/**
* @brief 显示图片
*
* @remark Image2Lcd取模方式： C语言数据/水平扫描/16位真彩色(RGB565)/高位在前其他的不要选
*
* @param x,y 起点坐标
* @param width 图片宽度
* @param height 图片高度
* @param p 图片缓存数据起始地址
*
* @return void
*/
void lcd_show_image(u16 x, u16 y, u16 width, u16 height, const u8 *p)
{
u16 i;
if(x + width > LCD_Width || y + height > LCD_Height)
{
return;
}
lcd_address_set(x, y, x + width - 1, y + height - 1);
lcd_dc=1;
for(i=0;i<width * height * 2;i++)
{
lcd_read_write_byte(p<i>);
}
}
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复制代码

lcd.h

#define lcd_cs PAout(4)
#define lcd_dc PAout(8)
#define lcd_rst PAout(15)
#define lcd_background PBout(3)
#define open_lcd() lcd_background=1
#define close_lcd() lcd_background=0
//LCD的宽和高定义
#define LCD_Width 240
#define LCD_Height 320
//画笔颜色
#define WHITE 0xFFFF
#define BLACK 0x0000
#define BLUE 0x001F
#define BRED 0XF81F
#define GRED 0XFFE0
#define GBLUE 0X07FF
#define RED 0xF800
#define MAGENTA 0xF81F
#define GREEN 0x07E0
#define CYAN 0x7FFF
#define YELLOW 0xFFE0
#define BROWN 0XBC40 //棕色
#define BRRED 0XFC07 //棕红色
#define GRAY 0X8430 //灰色
//GUI颜色
#define DARKBLUE 0X01CF //深蓝色
#define LIGHTBLUE 0X7D7C //浅蓝色
#define GRAYBLUE 0X5458 //灰蓝色
//以上三色为PANEL的颜色
#define LIGHTGREEN 0X841F //浅绿色
//#define LIGHTGRAY 0XEF5B //浅灰色(PANNEL)
#define LGRAY 0XC618 //浅灰色(PANNEL),窗体背景色
#define LGRAYBLUE 0XA651 //浅灰蓝色(中间层颜色)
#define LBBLUE 0X2B12 //浅棕蓝色(选择条目的反色)
void lcd_init(void);
void lcd_set_speed(u8 SPI_BaudRatePrescaler);
u8 lcd_read_write_byte(u8 TxData);
void lcd_clear(u16 color);
u16 lcd_read_id(void);
void lcd_draw_point(u16 x, u16 y,u16 pointColor);
void lcd_show_image(u16 x, u16 y, u16 width, u16 height, const u8 *p);
void lcd_show_string(u16 x, u16 y, u16 width, u16 height, u8 size, char *p,u16 pointColor,u16 backColor);
void lcd_show_char(u16 x, u16 y, char chr, u8 size,u16 pointColor,u16 backColor);
void lcd_draw_circle(u16 x0, u16 y0, u8 r,u16 pointColor);
void lcd_address_set(u16 x1, u16 y1, u16 x2, u16 y2);
void lcd_write_data(u8 data);
void lcd_write_cmd(u8 cmd);