请教spi驱动lcd显示屏问题

发布于 2018-12-03 17:20:48 浏览：2943 订阅该版

/*
 * SPI_ILI9225_LCD驱动
 */
#include "drv_lcd.h"

#define SPI_BUS_NAME   "spi1"
#define SPI_ILI9225_LCD_NAME "spi10"
struct LCD_ILI9225_SPI_CS//片选
{
 rt_uint8_t pin;
};
struct rt_lcd_ops
{
 void (* drawPoint)(rt_uint8_t x,rt_uint8_t y,rt_uint16_t data);
 void (* drawLine)(rt_uint16_t x0, rt_uint16_t y0,rt_uint16_t x1, rt_uint16_t y1,rt_uint16_t Color);
 void (* drawCircle)(rt_uint16_t X,rt_uint16_t Y,rt_uint16_t R,rt_uint16_t fc);
 void (* drawRect)(rt_uint16_t x, rt_uint16_t y, rt_uint16_t w, rt_uint16_t h,rt_uint16_t bc);
};
static struct rt_spi_device spi_dev_lcd;
static struct LCD_ILI9225_SPI_CS spi_cs;

void delay_ms(rt_uint32_t nms)
{
 volatile rt_uint16_t i;
 while (nms--)
 {
  for (i = 0; i < 500; i++)
  {
   __NOP();
  }
 }
}
//发送命令
static void ILI9225_write_reg(const rt_uint8_t cmd)
{
 rt_size_t len;
 
 rt_pin_write(TFT_RS,PIN_LOW);
 
 len = rt_spi_send(&spi_dev_lcd,&cmd,1);
 
    if (len != 1)
    {
        rt_kprintf("ILI9225_write_reg error. %d <br>", len);
    } 
}
//发送数据
static void ILI9225_write_data(const rt_uint8_t data)
{
    rt_size_t len;
 
    rt_pin_write(TFT_RS,PIN_HIGH);
    len = rt_spi_send(&spi_dev_lcd, &data, 1);
    if (len != 1)
    {
        rt_kprintf("ILI9225_write_data error. %d <br>", len);
    }
}
//发送16位数据
static void ILI9225_write_16bit_data(const rt_uint16_t data)
{
 ILI9225_write_data(data >> 8);
 ILI9225_write_data(data&0x00ff);
}
//寄存器写数据
static void ILI9225_write_reg_with_data(const rt_uint8_t cmd,const rt_uint16_t data)
{
 ILI9225_write_reg(cmd);
 ILI9225_write_16bit_data(data);
}
//SPI配置
static int rt_hw_ILI9225_config(void)
{
    rt_err_t res;
 spi_cs.pin=TFT_CS;
 rt_pin_mode(spi_cs.pin,PIN_MODE_OUTPUT);
 
    res = rt_spi_bus_attach_device(&spi_dev_lcd, SPI_ILI9225_LCD_NAME, SPI_BUS_NAME,(void* )&spi_cs);
    if (res != RT_EOK)
    {
        rt_kprintf("rt_spi_bus_attach_device! <br>");
        return res;
    }
    /* config spi */
    {
        struct rt_spi_configuration cfg;
        cfg.data_width = 8;
        cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_MASK;
        cfg.max_hz = 20 * 1000 * 1000; /* 20M,SPI max 42MHz, 4-wire spi */
        rt_spi_configure(&spi_dev_lcd, &cfg);
    }
    return RT_EOK;
}
//
static int ILI9225_hw_level_Init(void)
{
 rt_hw_ILI9225_config();
 
 rt_pin_mode(TFT_RS, PIN_MODE_OUTPUT);
 
 //LCD Init For 2.0inch LCD Panel with ILI9225. 
 ILI9225_write_reg_with_data(0x10, 0x0000); // Set SAP,DSTB,STB
 ILI9225_write_reg_with_data(0x11, 0x0000); // Set APON,PON,AON,VCI1EN,VC
 ILI9225_write_reg_with_data(0x12, 0x0000); // Set BT,DC1,DC2,DC3
 ILI9225_write_reg_with_data(0x13, 0x0000); // Set GVDD
 ILI9225_write_reg_with_data(0x14, 0x0000); // Set VCOMH/VCOML voltage
 delay_ms(40); // Delay 20 ms
 
 // Please follow this power on sequence
 ILI9225_write_reg_with_data(0x11, 0x0018); // Set APON,PON,AON,VCI1EN,VC
 ILI9225_write_reg_with_data(0x12, 0x1121); // Set BT,DC1,DC2,DC3
 ILI9225_write_reg_with_data(0x13, 0x0063); // Set GVDD
 ILI9225_write_reg_with_data(0x14, 0x3961); // Set VCOMH/VCOML voltage
 ILI9225_write_reg_with_data(0x10, 0x0800); // Set SAP,DSTB,STB
 delay_ms(10); // Delay 10 ms
 ILI9225_write_reg_with_data(0x11, 0x1038); // Set APON,PON,AON,VCI1EN,VC
 delay_ms(30); // Delay 30 ms
  
 ILI9225_write_reg_with_data(0x02, 0x0100); // set 1 line inversion
 
 ILI9225_write_reg_with_data(0x01,0x001C);//横屏
 ILI9225_write_reg_with_data(0x03,0x1038);
 
 ILI9225_write_reg_with_data(0x07, 0x0000); // Display off
 ILI9225_write_reg_with_data(0x08, 0x0808); // set the back porch and front porch
 ILI9225_write_reg_with_data(0x0B, 0x1100); // set the clocks number per line
 ILI9225_write_reg_with_data(0x0C, 0x0000); // CPU interface
 ILI9225_write_reg_with_data(0x0F, 0x0501); // Set Osc
 ILI9225_write_reg_with_data(0x15, 0x0020); // Set VCI recycling
 ILI9225_write_reg_with_data(0x20, 0x0000); // RAM Address
 ILI9225_write_reg_with_data(0x21, 0x0000); // RAM Address
 //-------------- Set GRAM area -----------------//
 ILI9225_write_reg_with_data(0x30, 0x0000); 
 ILI9225_write_reg_with_data(0x31, 0x00DB); 
 ILI9225_write_reg_with_data(0x32, 0x0000); 
 ILI9225_write_reg_with_data(0x33, 0x0000); 
 ILI9225_write_reg_with_data(0x34, 0x00DB); 
 ILI9225_write_reg_with_data(0x35, 0x0000); 
 ILI9225_write_reg_with_data(0x36, 0x00AF); 
 ILI9225_write_reg_with_data(0x37, 0x0000); 
 ILI9225_write_reg_with_data(0x38, 0x00DB); 
 ILI9225_write_reg_with_data(0x39, 0x0000); 
 // ----------- Adjust the Gamma Curve ----------//
 ILI9225_write_reg_with_data(0x50, 0x0603); 
 ILI9225_write_reg_with_data(0x51, 0x080D); 
 ILI9225_write_reg_with_data(0x52, 0x0D0C); 
 ILI9225_write_reg_with_data(0x53, 0x0205); 
 ILI9225_write_reg_with_data(0x54, 0x040A); 
 ILI9225_write_reg_with_data(0x55, 0x0703); 
 ILI9225_write_reg_with_data(0x56, 0x0300); 
 ILI9225_write_reg_with_data(0x57, 0x0400); 
 ILI9225_write_reg_with_data(0x58, 0x0B00); 
 ILI9225_write_reg_with_data(0x59, 0x0017);
 
 ILI9225_write_reg_with_data(0x0F, 0x0701); // Vertical RAM Address Position
 ILI9225_write_reg_with_data(0x07, 0x0012); // Vertical RAM Address Position
 delay_ms(50);                        // Delay 50ms
 ILI9225_write_reg_with_data(0x07, 0x1017); // Vertical RAM Address Position 
 
 rt_pin_mode(TFT_LEDA,PIN_MODE_OUTPUT);
 rt_pin_write(TFT_LEDA,PIN_HIGH);
 rt_thread_delay(10);
 
 lcd_clear(GREEN);
 return 0;
}

SPI10挂载成功，ili9225初始化代码也没问题，但是不能实现清屏******
求大神指导