ILI9341芯片驱动程序的问题

只看该作者 · 2016-3-11 19:46

本人刚入门stm32不久。最近自己设计了一款stm32最小系统+SD卡+TFT触摸屏。在写3.2寸TFT驱动程序时，参数设置使用了原厂提供的初始化程序，可是屏幕变成背景灰色，有一道一道的纹线，使用原子的驱动程序也出现同样的情况。读取屏幕的ID，可以正确的读到9431。现在卡在这里，不知道怎么办。请各位大神指点迷津。
程序如下：
ILI9341驱动程序：
#include <ILI9341.h>
#include "delay.h"

extern int REK; //ID号

void ILI9341_GPIO_config(void) //引脚配置
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable , ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_6|GPIO_Pin_5|GPIO_Pin_4|GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_All);
}

void LCD_WR_DATA(unsigned int val) //写数据
{
LCD_RS_SET;
LCD_RD_SET;
LCD_CS_CLR;
DATAOUT(val);
LCD_WR_CLR;
LCD_WR_SET;
LCD_CS_SET;
}

void LCD_WR_REG(unsigned int reg) //写命令字
{
LCD_RS_CLR;//Ð´µØÖ·
LCD_RD_SET;
LCD_CS_CLR;
DATAOUT(reg);
LCD_WR_CLR;
LCD_WR_SET;
LCD_CS_SET;
}

u16 LCD_RD_DATA(void) //读数据使用原子的程序
{
u16 t;
GPIOA->CRL=0X88888888;
GPIOA->CRH=0X88888888;
GPIOA->ODR=0X0000;

LCD_RS_SET;
LCD_CS_CLR;
LCD_RD_CLR;
t=DATAIN;
LCD_RD_SET;
LCD_CS_SET;

GPIOA->CRL=0X33333333;
GPIOA->CRH=0X33333333;
GPIOA->ODR=0XFFFF;
return t;
}

void LCD_Init(void) //ILI9341初始化
{
ILI9341_GPIO_config();

LCD_RE_SET;
delay_ms(100);
LCD_RE_CLR;
delay_ms(200);
LCD_RE_SET;
delay_ms(300);

LCD_WR_REG(0xD3);
LCD_RD_DATA(); //dummy read
LCD_RD_DATA();
REK=LCD_RD_DATA();
REK<<=8;
REK|=LCD_RD_DATA();

LCD_WR_REG(0xCF);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0xC1);
LCD_WR_DATA(0X30);
LCD_WR_REG(0xED);
LCD_WR_DATA(0x64);
LCD_WR_DATA(0x03);
LCD_WR_DATA(0X12);
LCD_WR_DATA(0X81);
LCD_WR_REG(0xE8);
LCD_WR_DATA(0x85);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x79);
LCD_WR_REG(0xCB);
LCD_WR_DATA(0x39);
LCD_WR_DATA(0x2C);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x34);
LCD_WR_DATA(0x02);
LCD_WR_REG(0xF7);
LCD_WR_DATA(0x20);
LCD_WR_REG(0xEA);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_REG(0xC0); //Power control
LCD_WR_DATA(0x1D); //VRH[5:0]
LCD_WR_REG(0xC1); //Power control
LCD_WR_DATA(0x12); //SAP[2:0];BT[3:0]
LCD_WR_REG(0xC5); //VCM control
LCD_WR_DATA(0x33);
LCD_WR_DATA(0x3F);
LCD_WR_REG(0xC7); //VCM control
LCD_WR_DATA(0x92);
LCD_WR_REG(0x3A); // Memory Access Control
LCD_WR_DATA(0x55);
LCD_WR_REG(0x36); // Memory Access Control
LCD_WR_DATA(0x08);
LCD_WR_REG(0xB1);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x12);
LCD_WR_REG(0xB6); // Display Function Control
LCD_WR_DATA(0x0A);
LCD_WR_DATA(0xA2);

LCD_WR_REG(0x44);
LCD_WR_DATA(0x02);

LCD_WR_REG(0xF2); // 3Gamma Function Disable
LCD_WR_DATA(0x00);
LCD_WR_REG(0x26); //Gamma curve selected
LCD_WR_DATA(0x01);
LCD_WR_REG(0xE0); //Set Gamma
LCD_WR_DATA(0x0F);
LCD_WR_DATA(0x22);
LCD_WR_DATA(0x1C);
LCD_WR_DATA(0x1B);
LCD_WR_DATA(0x08);
LCD_WR_DATA(0x0F);
LCD_WR_DATA(0x48);
LCD_WR_DATA(0xB8);
LCD_WR_DATA(0x34);
LCD_WR_DATA(0x05);
LCD_WR_DATA(0x0C);
LCD_WR_DATA(0x09);
LCD_WR_DATA(0x0F);
LCD_WR_DATA(0x07);
LCD_WR_DATA(0x00);
LCD_WR_REG(0XE1); //Set Gamma
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x23);
LCD_WR_DATA(0x24);
LCD_WR_DATA(0x07);
LCD_WR_DATA(0x10);
LCD_WR_DATA(0x07);
LCD_WR_DATA(0x38);
LCD_WR_DATA(0x47);
LCD_WR_DATA(0x4B);
LCD_WR_DATA(0x0A);
LCD_WR_DATA(0x13);
LCD_WR_DATA(0x06);
LCD_WR_DATA(0x30);
LCD_WR_DATA(0x38);
LCD_WR_DATA(0x0F);
LCD_WR_REG(0x11); //Exit Sleep
delay_ms(120);
LCD_WR_REG(0x29); //Display on
}

void LCD_SetArea(unsigned int stx,unsigned int sty,unsigned int endx,unsigned int endy) //设置窗口
{
LCD_WR_REG(0x2A);
// LCD_WR_DATA((stx>>8)&0x00ff);
// LCD_WR_DATA(stx&0x00ff);
// LCD_WR_DATA((endx>>8)&0x00ff);
// LCD_WR_DATA(endx&0x00ff);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x01);
LCD_WR_DATA(0x3f);
// LCD_WR_DATAX(stx);
// LCD_WR_DATAX(endx);

LCD_WR_REG(0x2B);
// LCD_WR_DATA((sty>>8)&0x00ff);
// LCD_WR_DATA(sty&0x00ff);
// LCD_WR_DATA((endy>>8)&0x00ff);
// LCD_WR_DATA(endy&0x00ff);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0xef);
// LCD_WR_DATAX(sty);
// LCD_WR_DATAX(endy);
}

void LCD_SetAreaXY(unsigned char x,unsigned int y)
{
LCD_SetArea(x,y,x,y);
}

void LcdWirteColorData(unsigned int color) //写颜色值至ILI9341
{
LCD_RS_SET;
LCD_RD_SET;
LCD_CS_CLR;
DATAOUT(color);
LCD_WR_CLR;
LCD_WR_SET;
LCD_CS_SET;
}

void LCD_Clear(unsigned int color) //清屏操作
{
unsigned int i,j;

LCD_SetArea(0,0,239,319);
LCD_WR_REG(0x2C);
for(i = 0;i < 320;i++)
{
for(j = 0;j < 240;j++)
{
LcdWirteColorData(color);
}
}
}
主函数：
int REK = 0xffff;

int main(void)
{
USART3_Config(9600);
            delay_init();
            LCD_Init();
            LCD_Clear(Yellow);
while(1)
{
printf("ID is :%x\n",REK);
                     LCD_Clear(Yellow);
}
}