编写代码例程，要求如下：基于正点原子STM32F103ZET6开发板，使TFTLCD液晶屏能显示图片的驱动函数，驱动函数定义在lcd.c文件中

好的，以下是一个基于正点原子STM32F103ZET6开发板，使TFTLCD液晶屏能显示图片的驱动函数的例程，驱动函数定义在`lcd.c`文件中：

// lcd.c 文件

#include "lcd.h"

void LCD_WriteCommand(uint8_t cmd) {
  LCD_DC_LOW;
  LCD_CS_LOW;
  spi_write(cmd);
  LCD_CS_HIGH;
}

void LCD_WriteData(uint8_t data) {
  LCD_DC_HIGH;
  LCD_CS_LOW;
  spi_write(data);
  LCD_CS_HIGH;
}

void LCD_Init(void) {
  // 初始化SPI接口
  spi_init();
  
  // 复位LCD
  LCD_RST_LOW;
  delay_ms(100);
  LCD_RST_HIGH;
  delay_ms(100);

  // 初始化LCD
  LCD_WriteCommand(0x01); //软件复位
  delay_ms(50);
  LCD_WriteCommand(0x11); //休眠解除
  delay_ms(120);
  LCD_WriteCommand(0x3A); //设置像素格式
  LCD_WriteData(0x55);
  LCD_WriteCommand(0xC2); //电源控制设置
  LCD_WriteData(0x44);
  LCD_WriteData(0x00);
  LCD_WriteCommand(0xC5); //VCOM控制设置
  LCD_WriteData(0x00);
  LCD_WriteData(0x00);
  LCD_WriteCommand(0xE0); //设置Gamma表
  LCD_WriteData(0x0F);
  LCD_WriteData(0x1F);
  LCD_WriteData(0x1C);
  LCD_WriteData(0x0C);
  LCD_WriteData(0x0F);
  LCD_WriteData(0x08);
  LCD_WriteData(0x48);
  LCD_WriteData(0x98);
  LCD_WriteData(0x37);
  LCD_WriteData(0x0A);
  LCD_WriteData(0x13);
  LCD_WriteData(0x04);
  LCD_WriteData(0x11);
  LCD_WriteData(0x0D);
  LCD_WriteData(0x00);
  LCD_WriteCommand(0xE1); //设置Gamma表
  LCD_WriteData(0x0F);
  LCD_WriteData(0x32);
  LCD_WriteData(0x2E);
  LCD_WriteData(0x0B);
  LCD_WriteData(0x0D);
  LCD_WriteData(0x05);
  LCD_WriteData(0x47);
  LCD_WriteData(0x75);
  LCD_WriteData(0x37);
  LCD_WriteData(0x06);
  LCD_WriteData(0x10);
  LCD_WriteData(0x03);
  LCD_WriteData(0x24);
  LCD_WriteData(0x20);
  LCD_WriteData(0x00);
  LCD_WriteCommand(0x20); //显示开启
  LCD_WriteCommand(0x36); //设置扫描方向
  LCD_WriteData(0xC8);
  LCD_WriteCommand(0x2A); //设置X方向坐标
  LCD_WriteData(0x00);
  LCD_WriteData(0x00);
  LCD_WriteData(0x00);
  LCD_WriteData(0xEF);
  LCD_WriteCommand(0x2B); //设置Y方向坐标
  LCD_WriteData(0x00);
  LCD_WriteData(0x00);
  LCD_WriteData(0x01);
  LCD_WriteData(0x3F);
  LCD_WriteCommand(0x29); //显示开始
}

void LCD_DrawImage(uint16_t x, uint16_t y, uint16_t width, uint16_t height, const uint8_t* image_data) {
  uint32_t size = width * height * 2;
  LCD_SetWindow(x, y, x + width - 1, y + height - 1);
  for (uint32_t i = 0; i < size; i += 2) {
    uint16_t color = (image_data[i] << 8) | image_data[i+1];
    LCD_WriteData(color);
  }
}

void LCD_SetWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1) {
  LCD_WriteCommand(0x2A); //设置X方向坐标
  LCD_WriteData(x0 >> 8);
  LCD_WriteData(x0 & 0xFF);
  LCD_WriteData(x1 >> 8);
  LCD_WriteData(x1 & 0xFF);
  LCD_WriteCommand(0x2B); //设置Y方向坐标
  LCD_WriteData(y0 >> 8);
  LCD_WriteData(y0 & 0xFF);
  LCD_WriteData(y1 >> 8);
  LCD_WriteData(y1 & 0xFF);
  LCD_WriteCommand(0x2C); //开始写数据
}

这个例程中，`LCD_Init()`函数用于初始化LCD屏幕，`LCD_DrawImage()`函数用于在指定的位置显示图片，`LCD_SetWindow()`函数用于设置LCD屏幕上的窗口区域。需要注意的是，这里的图片数据是一个二进制数组，需要在主程序中定义好并传入函数中。