在实现LCD5110屏显示之后，本打算完成I2C接口的OLED屏显示，无奈经多次测试似乎在GD32F450上无法实现，故只得进行SPI接口的2.2寸TFT彩色屏测试。
为了便于连线，TFT屏与GD32F450开发板的连接是通过Arduino接口，相应的连接关系如下：
CS -- PE2 REST -- PE5 DC -- PE6 SDI -- PE4 SCK -- PD0 LED+ -- PD1
GND可直接从Arduino接口取用，而稍有遗憾的是3.3V 电源则要从其位置引用。
在相应引脚设置为输出模式的情况下，其输出高低电平的语句定义如下：
#define LCD_CS_High() gpio_bit_set(GPIOE, GPIO_PIN_2);
#define LCD_CS_Low() gpio_bit_reset(GPIOE, GPIO_PIN_2);
#define LCD_REST_High() gpio_bit_set(GPIOE, GPIO_PIN_5);
#define LCD_REST_Low() gpio_bit_reset(GPIOE, GPIO_PIN_5);
#define LCD_DC_High() gpio_bit_set(GPIOE, GPIO_PIN_6);
#define LCD_DC_Low() gpio_bit_reset(GPIOE, GPIO_PIN_6);
#define LCD_SDI_High() gpio_bit_set(GPIOE, GPIO_PIN_4);
#define LCD_SDI_Low() gpio_bit_reset(GPIOE, GPIO_PIN_4);
#define LCD_SCK_High() gpio_bit_set(GPIOD, GPIO_PIN_0);
#define LCD_SCK_Low() gpio_bit_reset(GPIOD, GPIO_PIN_0);
#define LCD_LED_High() gpio_bit_set(GPIOD, GPIO_PIN_1);
#define LCD_LED_Low() gpio_bit_reset(GPIOD, GPIO_PIN_1);
在其它函数基本不变的情况下，即可实现TFT屏的显示驱动。
为实现图像的显示，可将图像数据存放到数组中以供读取，实现的显示效果如图所示。
对应的引脚配置函数为： void SPI_CONFIG()
{
rcu_periph_clock_enable(RCU_GPIOE);
gpio_mode_set (GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_2| GPIO_PIN_5| GPIO_PIN_6| GPIO_PIN_4);
gpio_output_options_set(GPIOE, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN_2| GPIO_PIN_5| GPIO_PIN_6| GPIO_PIN_4);
rcu_periph_clock_enable(RCU_GPIOD);
gpio_mode_set (GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_0| GPIO_PIN_1);
gpio_output_options_set(GPIOD, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN_0| GPIO_PIN_1);
GPIO_BOP(GPIOD) = GPIO_PIN_1;
rcu_periph_clock_enable(RCU_GPIOB);
gpio_mode_set (GPIOB, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO_PIN_14);
gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_14);
}
初始化函数为： void Lcd_Init(void)
{
LCD_REST_Low();
delay_1ms(20);
LCD_REST_High();
delay_1ms(20);
LCD_CS_Low();
LCD_WR_REG(0xCB);
LCD_WR_DATA8(0x39);
LCD_WR_DATA8(0x2C);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x34);
LCD_WR_DATA8(0x02);
LCD_WR_REG(0xCF);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0XC1);
LCD_WR_DATA8(0X30);
LCD_WR_REG(0xE8);
LCD_WR_DATA8(0x85);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x78);
LCD_WR_REG(0xEA);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x00);
LCD_WR_REG(0xED);
LCD_WR_DATA8(0x64);
LCD_WR_DATA8(0x03);
LCD_WR_DATA8(0X12);
LCD_WR_DATA8(0X81);
LCD_WR_REG(0xF7);
LCD_WR_DATA8(0x20);
LCD_WR_REG(0xC0);
LCD_WR_DATA8(0x23);
LCD_WR_REG(0xC1);
LCD_WR_DATA8(0x10);
LCD_WR_REG(0xC5);
LCD_WR_DATA8(0x3e);
LCD_WR_DATA8(0x28);
LCD_WR_REG(0xC7);
LCD_WR_DATA8(0x86);
LCD_WR_REG(0x36);
LCD_WR_DATA8(0x48);
LCD_WR_REG(0x3A);
LCD_WR_DATA8(0x55);
LCD_WR_REG(0xB1);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x18);
LCD_WR_REG(0xB6);
LCD_WR_DATA8(0x08);
LCD_WR_DATA8(0x82);
LCD_WR_DATA8(0x27);
LCD_WR_REG(0xF2);
LCD_WR_DATA8(0x00);
LCD_WR_REG(0x26);
LCD_WR_DATA8(0x01);
LCD_WR_REG(0xE0);
LCD_WR_DATA8(0x0F);
LCD_WR_DATA8(0x31);
LCD_WR_DATA8(0x2B);
LCD_WR_DATA8(0x0C);
LCD_WR_DATA8(0x0E);
LCD_WR_DATA8(0x08);
LCD_WR_DATA8(0x4E);
LCD_WR_DATA8(0xF1);
LCD_WR_DATA8(0x37);
LCD_WR_DATA8(0x07);
LCD_WR_DATA8(0x10);
LCD_WR_DATA8(0x03);
LCD_WR_DATA8(0x0E);
LCD_WR_DATA8(0x09);
LCD_WR_DATA8(0x00);
LCD_WR_REG(0XE1);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x0E);
LCD_WR_DATA8(0x14);
LCD_WR_DATA8(0x03);
LCD_WR_DATA8(0x11);
LCD_WR_DATA8(0x07);
LCD_WR_DATA8(0x31);
LCD_WR_DATA8(0xC1);
LCD_WR_DATA8(0x48);
LCD_WR_DATA8(0x08);
LCD_WR_DATA8(0x0F);
LCD_WR_DATA8(0x0C);
LCD_WR_DATA8(0x31);
LCD_WR_DATA8(0x36);
LCD_WR_DATA8(0x0F);
LCD_WR_REG(0x11);
delay_1ms(120);
LCD_WR_REG(0x29);
LCD_WR_REG(0x2c);
}
主函数为： int main(void)
{
systick_config();
SPI_CONFIG();
Lcd_Init();
show_pic(gImage_123);
while (1);
}
| 
楼主
标题置顶
标题高亮
