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06 雅特力AT32A403开发板评测 06 1.28寸 SPI接口 圆形屏幕显示移植.

06-雅特力车规级MCU-AT32A403A开发板评测 GC9A01 SPI-LCD 1.28圆形屏幕

硬件平台

  1. AT32A403A Board开发板

  2. 1.28寸圆形彩色TFT显示屏高清IPS 模块240X240 SPI接口GC9A01

产品介绍

推荐一个屏幕资料参考网站 http://www.lcdwiki.com/1.28inch_IPS_Module

  • 1.28寸圆形IPS彩屏,支持 RGB 65K色显示,显示色彩丰富
  • 240X240分辨率,显示清晰
  • IPS全视角面板,超宽可视范围
  • 采用4线制SPI串行总线,只需几个IO即可点亮
  • 提供丰富的Arduino、STM32、C51以及MSP430示例程序
  • 军工级工艺标准,长期稳定工作
  • 提供底层驱动技术支持

产品参数

名称参数
显示颜色RGB 65K 彩色
SKUMSP1281
尺寸1.28(inch)
面板材质TFT
驱动芯片GC9A01
分辨率240*240 (Pixel)
显示接口4-line SPI interface
有效显示区域(AA区)直径:32.40 (mm)
触摸屏类型无触摸屏
触摸IC无触摸IC
模块PCB底板尺寸38.03x45.80(mm)
视角全角度
工作温度-10℃~60℃
存储温度-20℃~70℃
工作电压3.3V

接口定义

序号模块引脚引脚说明
1GND液晶屏电源地
2VCC液晶屏电源正(3.3V/5V)
3SCL液晶屏SPI总线时钟信号
4SDA液晶屏SPI总线写数据信号
5RES液晶屏复位控制信号(低电平复位,模块有复位电路,该引脚可不接)
6DC液晶屏寄存器/数据选择控制信号(低电平:寄存器,高电平:数据)
7CS液晶屏片选控制信号(低电平使能)
8BLK液晶屏背光控制信号(高电平点亮,如不需要控制,请接3.3V)

模拟SPI移植LCD屏幕驱动

  1. 建立工程模板,添加相关驱动文件

    //lcd_gc9a01 硬件驱动层代码
    lcd_gc9a01.c
    lcd_gc9a01.h
    //lcd_gc9a01 软件应用层代码
    lcd_guic
    lcd_gui.h
    lcd_font.h
    //lcd_gc9a01 软件测试代码
    lcd_example.c
    lcd_example.h

  1. 配置引脚 选择引脚,进入工程开始编写屏幕引脚初始化代码。为了方便后续移植,我在lcd_gc9a01.h处宏定义了每一个引脚,后续根据需要进行修改即可。
#define LCD_GPIO_PORT       GPIOD
#define LCD_GPIO_PORT_CLK CRM_GPIOD_PERIPH_CLOCK

#define SCL_GPIO_PORT GPIOD
#define SCL_GPIO_PIN GPIO_PINS_8
#define SCL_GPIO_PORT_CLK CRM_GPIOD_PERIPH_CLOCK

#define SDA_GPIO_PORT GPIOD
#define SDA_GPIO_PIN GPIO_PINS_9
#define SDA_GPIO_PORT_CLK CRM_GPIOD_PERIPH_CLOCK

#define RES_GPIO_PORT GPIOD
#define RES_GPIO_PIN GPIO_PINS_10
#define RES_GPIO_PORT_CLK CRM_GPIOD_PERIPH_CLOCK

#define DC_GPIO_PORT GPIOD
#define DC_GPIO_PIN GPIO_PINS_11
#define DC_GPIO_PORT_CLK CRM_GPIOD_PERIPH_CLOCK

#define CS_GPIO_PORT GPIOD
#define CS_GPIO_PIN GPIO_PINS_12
#define CS_GPIO_PORT_CLK CRM_GPIOD_PERIPH_CLOCK

#define BLK_GPIO_PORT GPIOD
#define BLK_GPIO_PIN GPIO_PINS_13
#define BLK_GPIO_PORT_CLK CRM_GPIOD_PERIPH_CLOCK

  1. 屏幕GPIO端口初始化配置
void lcd_gpio_init(void)
{
gpio_init_type gpio_init_struct;

/* enable the gpioa clock */
crm_periph_clock_enable(LCD_GPIO_PORT_CLK, TRUE);

/* set default parameter */
gpio_default_para_init(&gpio_init_struct);

/* configure the gpio */
gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
gpio_init_struct.gpio_pins = SDA_GPIO_PIN |SCL_GPIO_PIN|RES_GPIO_PIN|DC_GPIO_PIN|CS_GPIO_PIN|BLK_GPIO_PIN;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
gpio_init(LCD_GPIO_PORT, &gpio_init_struct);

}
  1. SPI 接口宏定义设置
#define SPI_SCLK_SET    gpio_bits_set(SCL_GPIO_PORT,SCL_GPIO_PIN)
#define SPI_SCLK_CLR gpio_bits_reset(SCL_GPIO_PORT,SCL_GPIO_PIN)

#define SPI_MOSI_SET gpio_bits_set(SDA_GPIO_PORT,SDA_GPIO_PIN)
#define SPI_MOSI_CLR gpio_bits_reset(SDA_GPIO_PORT,SDA_GPIO_PIN)



#define LCD_RES_SET gpio_bits_set(RES_GPIO_PORT,RES_GPIO_PIN)
#define LCD_RES_CLR gpio_bits_reset(RES_GPIO_PORT,RES_GPIO_PIN)

#define LCD_DC_SET gpio_bits_set(DC_GPIO_PORT,DC_GPIO_PIN)
#define LCD_DC_CLR gpio_bits_reset(DC_GPIO_PORT,DC_GPIO_PIN)

#define LCD_CS_SET gpio_bits_set(CS_GPIO_PORT,CS_GPIO_PIN)
#define LCD_CS_CLR gpio_bits_reset(CS_GPIO_PORT,CS_GPIO_PIN)

#define LCD_BLK_SET gpio_bits_set(BLK_GPIO_PORT,BLK_GPIO_PIN)
#define LCD_BLK_CLR gpio_bits_reset(BLK_GPIO_PORT,BLK_GPIO_PIN)

  1. 软件SPI代码实现

    /*****************************************************************************
    * @name :void SPI_WriteByte(uint8_t Data)
    * @function :Write a byte of data using STM32's Software SPI
    * @parameters :Data:Data to be written
    * @retvalue :None
    ******************************************************************************/
    void SPI_WriteByte(uint8_t Data)
    {
    unsigned char i=0;
    for(i=8;i>0;i--)
    {
    if(Data&0x80)
    SPI_MOSI_SET; //输出数据
    else
    SPI_MOSI_CLR;
    SPI_SCLK_CLR;
    SPI_SCLK_SET;
    Data<<=1;
    }
    }

    /*****************************************************************************
    * @name :void LCD_WR_REG(uint8_t data)
    * @function :Write an 8-bit command to the LCD screen
    * @parameters :data:Command value to be written
    * @retvalue :None
    ******************************************************************************/
    void LCD_WR_REG(uint8_t data)
    {
    LCD_CS_CLR;
    LCD_DC_CLR;
    SPI_WriteByte(data);
    LCD_CS_SET;
    }

    /*****************************************************************************
    * @name :void LCD_WR_DATA(uint8_t data)
    * @function :Write an 8-bit data to the LCD screen
    * @parameters :data:data value to be written
    * @retvalue :None
    ******************************************************************************/
    void LCD_WR_DATA(uint8_t data)
    {
    LCD_CS_CLR;
    LCD_DC_SET;
    SPI_WriteByte(data);
    LCD_CS_SET;
    }

    如果传输的数据位为1,则将SPI数据引脚拉高;传输的数据位为0,则将SPI数据引脚拉低。每次传输一个字节数据,高位在前,每个时钟上升沿传输1位数据。

  2. LCD初始化函数

    /*****************************************************************************
    * @name :void LCD_Init(void)
    * @date :2018-08-09
    * @function :Initialization LCD screen
    * @parameters :None
    * @retvalue :None
    ******************************************************************************/
    void LCD_Init(void)
    {
    lcd_gpio_init();
    LCD_RESET(); //LCD 复位
    //************* GC9A01初始化**********//
    LCD_WR_REG(0xEF);
    LCD_WR_REG(0xEB);
    LCD_WR_DATA(0x14);

    LCD_WR_REG(0xFE);
    LCD_WR_REG(0xEF);

    LCD_WR_REG(0xEB);
    LCD_WR_DATA(0x14);

    LCD_WR_REG(0x84);
    LCD_WR_DATA(0x40);

    LCD_WR_REG(0x85);
    LCD_WR_DATA(0xFF);

    LCD_WR_REG(0x86);
    LCD_WR_DATA(0xFF);

    LCD_WR_REG(0x87);
    LCD_WR_DATA(0xFF);

    LCD_WR_REG(0x88);
    LCD_WR_DATA(0x0A);

    LCD_WR_REG(0x89);
    LCD_WR_DATA(0x21);

    LCD_WR_REG(0x8A);
    LCD_WR_DATA(0x00);

    LCD_WR_REG(0x8B);
    LCD_WR_DATA(0x80);

    LCD_WR_REG(0x8C);
    LCD_WR_DATA(0x01);

    LCD_WR_REG(0x8D);
    LCD_WR_DATA(0x01);

    LCD_WR_REG(0x8E);
    LCD_WR_DATA(0xFF);

    LCD_WR_REG(0x8F);
    LCD_WR_DATA(0xFF);


    LCD_WR_REG(0xB6);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x20);

    LCD_WR_REG(0x36);
    LCD_WR_DATA(0x08);

    LCD_WR_REG(0x3A);
    LCD_WR_DATA(0x05);


    LCD_WR_REG(0x90);
    LCD_WR_DATA(0x08);
    LCD_WR_DATA(0x08);
    LCD_WR_DATA(0x08);
    LCD_WR_DATA(0x08);

    LCD_WR_REG(0xBD);
    LCD_WR_DATA(0x06);

    LCD_WR_REG(0xBC);
    LCD_WR_DATA(0x00);

    LCD_WR_REG(0xFF);
    LCD_WR_DATA(0x60);
    LCD_WR_DATA(0x01);
    LCD_WR_DATA(0x04);

    LCD_WR_REG(0xC3);
    LCD_WR_DATA(0x13);
    LCD_WR_REG(0xC4);
    LCD_WR_DATA(0x13);

    LCD_WR_REG(0xC9);
    LCD_WR_DATA(0x22);

    LCD_WR_REG(0xBE);
    LCD_WR_DATA(0x11);

    LCD_WR_REG(0xE1);
    LCD_WR_DATA(0x10);
    LCD_WR_DATA(0x0E);

    LCD_WR_REG(0xDF);
    LCD_WR_DATA(0x21);
    LCD_WR_DATA(0x0c);
    LCD_WR_DATA(0x02);

    LCD_WR_REG(0xF0);
    LCD_WR_DATA(0x45);
    LCD_WR_DATA(0x09);
    LCD_WR_DATA(0x08);
    LCD_WR_DATA(0x08);
    LCD_WR_DATA(0x26);
    LCD_WR_DATA(0x2A);

    LCD_WR_REG(0xF1);
    LCD_WR_DATA(0x43);
    LCD_WR_DATA(0x70);
    LCD_WR_DATA(0x72);
    LCD_WR_DATA(0x36);
    LCD_WR_DATA(0x37);
    LCD_WR_DATA(0x6F);


    LCD_WR_REG(0xF2);
    LCD_WR_DATA(0x45);
    LCD_WR_DATA(0x09);
    LCD_WR_DATA(0x08);
    LCD_WR_DATA(0x08);
    LCD_WR_DATA(0x26);
    LCD_WR_DATA(0x2A);

    LCD_WR_REG(0xF3);
    LCD_WR_DATA(0x43);
    LCD_WR_DATA(0x70);
    LCD_WR_DATA(0x72);
    LCD_WR_DATA(0x36);
    LCD_WR_DATA(0x37);
    LCD_WR_DATA(0x6F);

    LCD_WR_REG(0xED);
    LCD_WR_DATA(0x1B);
    LCD_WR_DATA(0x0B);

    LCD_WR_REG(0xAE);
    LCD_WR_DATA(0x77);

    LCD_WR_REG(0xCD);
    LCD_WR_DATA(0x63);


    LCD_WR_REG(0x70);
    LCD_WR_DATA(0x07);
    LCD_WR_DATA(0x07);
    LCD_WR_DATA(0x04);
    LCD_WR_DATA(0x0E);
    LCD_WR_DATA(0x0F);
    LCD_WR_DATA(0x09);
    LCD_WR_DATA(0x07);
    LCD_WR_DATA(0x08);
    LCD_WR_DATA(0x03);

    LCD_WR_REG(0xE8);
    LCD_WR_DATA(0x34);

    LCD_WR_REG(0x62);
    LCD_WR_DATA(0x18);
    LCD_WR_DATA(0x0D);
    LCD_WR_DATA(0x71);
    LCD_WR_DATA(0xED);
    LCD_WR_DATA(0x70);
    LCD_WR_DATA(0x70);
    LCD_WR_DATA(0x18);
    LCD_WR_DATA(0x0F);
    LCD_WR_DATA(0x71);
    LCD_WR_DATA(0xEF);
    LCD_WR_DATA(0x70);
    LCD_WR_DATA(0x70);

    LCD_WR_REG(0x63);
    LCD_WR_DATA(0x18);
    LCD_WR_DATA(0x11);
    LCD_WR_DATA(0x71);
    LCD_WR_DATA(0xF1);
    LCD_WR_DATA(0x70);
    LCD_WR_DATA(0x70);
    LCD_WR_DATA(0x18);
    LCD_WR_DATA(0x13);
    LCD_WR_DATA(0x71);
    LCD_WR_DATA(0xF3);
    LCD_WR_DATA(0x70);
    LCD_WR_DATA(0x70);

    LCD_WR_REG(0x64);
    LCD_WR_DATA(0x28);
    LCD_WR_DATA(0x29);
    LCD_WR_DATA(0xF1);
    LCD_WR_DATA(0x01);
    LCD_WR_DATA(0xF1);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x07);

    LCD_WR_REG(0x66);
    LCD_WR_DATA(0x3C);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0xCD);
    LCD_WR_DATA(0x67);
    LCD_WR_DATA(0x45);
    LCD_WR_DATA(0x45);
    LCD_WR_DATA(0x10);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x00);

    LCD_WR_REG(0x67);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x3C);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x01);
    LCD_WR_DATA(0x54);
    LCD_WR_DATA(0x10);
    LCD_WR_DATA(0x32);
    LCD_WR_DATA(0x98);

    LCD_WR_REG(0x74);
    LCD_WR_DATA(0x10);
    LCD_WR_DATA(0x85);
    LCD_WR_DATA(0x80);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x00);
    LCD_WR_DATA(0x4E);
    LCD_WR_DATA(0x00);

    LCD_WR_REG(0x98);
    LCD_WR_DATA(0x3e);
    LCD_WR_DATA(0x07);

    LCD_WR_REG(0x35);
    LCD_WR_REG(0x21);

    LCD_WR_REG(0x11);
    delay_ms(120);

    LCD_WR_REG(0x29);
    LCD_direction(USE_HORIZONTAL);//设置LCD显示方向
    LCD_BLK_SET;//点亮背光
    LCD_Clear(WHITE);//清全屏白色
    }
  1. 驱动完整代码见仓库代码

屏幕测试

  1. 主程序
#include "main.h"

/**
* @brief main function.
* @param none
* @retval none
*/
int main(void)
{
// unsigned char count_num;
system_clock_config();
at32_board_init();
uart_print_init(115200);
module_smg_gpio_iint();
LCD_Init();
/* output a message on hyperterminal using printf function */
//printf("usart printf example: retarget the c library printf function to the usart\r\n");
printf("Hardware_Init [ok] \r\n");
printf("at_start_a403a board testing 2024-02-13\r\n");
printf("at_start_a403a board module softspi lcd \r\n");


while(1)
{
printf("lcd_example_test [start] \r\n");
main_test();
menu_test();
English_Font_test();
Chinese_Font_test();

printf("lcd_example_test [end] \r\n");
}
}

  1. 测试效果