基于GD32F450开发板的TFT串口屏图像显示

jinglixixi

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。
[img=474,350]file:///DersonalTempksohtmlwps9A6C.tmp.jpg[/img]
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);}图像显示函数为：
void show_pic(const unsigned char *p){int i,j;unsigned char picH,picL;Address_set(0,0,LCD_W-1,LCD_H-1);for(i=0;i<240;i++){for(j=0;j<320;j++){picH=*p++;picL=*p++;LCD_WR_DATA8(picH);LCD_WR_DATA8(picL);}}}主函数为：
int main(void){systick_config();SPI_CONFIG();Lcd_Init();show_pic(gImage_123);while (1);}