I have an 2.8" LCD that it's controller is ILI9325. I'm trying to use it. for start off, I have written a simple program. the program is this:
#include "stm32f10x.h"
#include "ILI9325.h"
int main(void)
{
uint8_t b,c;
Lcd_Configuration();
Lcd_Initialize();
Lcd_Clear(0xffff);
Lcd_Clear(0x0000);
Lcd_Clear(0xff00);
for ( b = 0 ; b < 200 ; b++ )
{
for ( c = 0 ; c < 200 ; c++ )
{
DrawPixel( b , c , 0xffff );
}
}
test_color();
/* Infinite loop */
while (1)
{
}
}
The ILI9325.h
is:
#ifndef __ILI9325_H
#define __ILI9325_H
// ILI9320 or ILI9325
#define ILI9325
#define ID_AM 110
extern u16 q;
//#define Delay //Display Delay//Immediately
#define Set_Cs GPIO_SetBits(GPIOC,GPIO_Pin_8);
#define Clr_Cs GPIO_ResetBits(GPIOC,GPIO_Pin_8);
#define Set_Rs GPIO_SetBits(GPIOC,GPIO_Pin_9);
#define Clr_Rs GPIO_ResetBits(GPIOC,GPIO_Pin_9);
#define Set_nWr GPIO_SetBits(GPIOC,GPIO_Pin_10);
#define Clr_nWr GPIO_ResetBits(GPIOC,GPIO_Pin_10);
#define Set_nRd GPIO_SetBits(GPIOC,GPIO_Pin_11);
#define Clr_nRd GPIO_ResetBits(GPIOC,GPIO_Pin_11);
#define Set_Rst GPIO_SetBits(GPIOC,GPIO_Pin_12);
#define Clr_Rst GPIO_ResetBits(GPIOC,GPIO_Pin_12);
#define Lcd_Light_ON GPIO_SetBits(GPIOC,GPIO_Pin_13);
#define Lcd_Light_OFF GPIO_ResetBits(GPIOC,GPIO_Pin_13);
typedef union
{
u16 U16;
u8 U8[2];
}ColorTypeDef;
void Lcd_Configuration(void);
void DataToWrite(u16 data);
void LCD_WR_REG(u16 Index,u16 CongfigTemp);
void Lcd_Initialize(void);
void Lcd_WR_Start(void);
void Lcd_SetCursor(u8 x,u16 y);
void Lcd_Clear(u16 Color);
void Lcd_ClearCharBox(u8 x,u16 y,u16 Color);
void DrawPixel(u16 x, u16 y, int Color);
void Lcd_SetBox(u8 xStart,u16 yStart,u8 xLong,u16 yLong,u16 x_offset,u16 y_offset);
void Lcd_ColorBox(u8 x,u16 y,u8 xLong,u16 yLong,u16 Color);
void test_color(void);
void Delay_nms(int n);
//u16 Read9325(void);
#endif
and the ILI9325.c
is:
#include "stm32f10x.h"
#include "ILI9325.h"
u16 q;
/****************************************************************
PB8--PB15
PC0--PC7
PC8 --> Lcd_cs
PC9 --> Lcd_rs*
PC10 --> Lcd_wr
PC11 --> Lcd_rd*
PC12 --> Lcd_rst
PC13 --> Lcd_blaklight
*****************************************************************/
void Lcd_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_13;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
void DataToWrite(u16 data)
{
u16 temp;
temp = GPIO_ReadOutputData(GPIOB);
GPIO_Write(GPIOB, (data<<8)|(temp&0x00ff));
temp = GPIO_ReadOutputData(GPIOC);
GPIO_Write(GPIOC, (data>>8)|(temp&0xff00));
}
void LCD_WR_REG(u16 Index,u16 CongfigTemp)
{
Clr_Cs;
Clr_Rs;
Set_nRd;
DataToWrite(Index);
Clr_nWr;
Set_nWr;
Set_Rs;
DataToWrite(CongfigTemp);
Clr_nWr;
Set_nWr;
Set_Cs;
}
u16 CheckController(void)
{
u16 tmp=0,tmp1=0,tmp2=0;
GPIO_InitTypeDef GPIO_InitStructure;
DataToWrite(0xffff);
Set_Rst;
Set_nWr;
Set_Cs;
Set_Rs;
Set_nRd;
Set_Rst;
Delay_nms(1);
Clr_Rst;
Delay_nms(1);
Set_Rst;
Delay_nms(1);
LCD_WR_REG(0x0000,0x0001); //start oscillation
Delay_nms(1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_ResetBits(GPIOC,GPIO_Pin_8);
GPIO_SetBits(GPIOC,GPIO_Pin_9);
GPIO_ResetBits(GPIOC,GPIO_Pin_11);
tmp1 = GPIO_ReadInputData(GPIOB);
tmp2 = GPIO_ReadInputData(GPIOC);
tmp = (tmp1>>8) | (tmp2<<8);
GPIO_SetBits(GPIOC,GPIO_Pin_11);
GPIO_SetBits(GPIOC,GPIO_Pin_8);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_Init(GPIOC, &GPIO_InitStructure);
return tmp;
}
void Lcd_Initialize(void)
{
u16 i;
Lcd_Light_ON;
DataToWrite(0xffff);
Set_Rst;
Set_nWr;
Set_Cs;
Set_Rs;
Set_nRd;
Set_Rst;
Delay_nms(1);
Clr_Rst;
Delay_nms(1);
Set_Rst;
Delay_nms(1);
/*
#ifdef ILI9325
LCD_WR_REG(0x00e3,0x3008);
LCD_WR_REG(0x00e7,0x0010);
LCD_WR_REG(0x00ef,0x1231); //Set the internal vcore voltage
LCD_WR_REG(0x0001,0x0100); //When SS = 0, the shift direction of outputs is from S1 to S720
#endif //When SS = 1, the shift direction of outputs is from S720 to S1.
#ifdef ILI9320
LCD_WR_REG(0x00e5,0x8000);
LCD_WR_REG(0x0000,0x0001);
LCD_WR_REG(0x0001,0x0100);//S
Delay_nms(10);
#endif
LCD_WR_REG(0x0002,0x0700);//Line inversion
#if ID_AM==000
LCD_WR_REG(0x0003,0x0000);
#elif ID_AM==001
LCD_WR_REG(0x0003,0x0008);
#elif ID_AM==010
LCD_WR_REG(0x0003,0x0010);
#elif ID_AM==011
LCD_WR_REG(0x0003,0x0018);
#elif ID_AM==100
LCD_WR_REG(0x0003,0x0020);
#elif ID_AM==101
LCD_WR_REG(0x0003,0x0028);
#elif ID_AM==110
LCD_WR_REG(0x0003,0x0030);
#elif ID_AM==111
LCD_WR_REG(0x0003,0x0038);
#endif
LCD_WR_REG(0x0004,0x0000);
LCD_WR_REG(0x0008,0x0207);
LCD_WR_REG(0x0009,0x0000);
LCD_WR_REG(0x000a,0x0000);
LCD_WR_REG(0x000c,0x0001);
LCD_WR_REG(0x000d,0x0000);
LCD_WR_REG(0x000f,0x0000);
LCD_WR_REG(0x0010,0x0000);
LCD_WR_REG(0x0011,0x0000);
LCD_WR_REG(0x0012,0x0000);
LCD_WR_REG(0x0013,0x0000);
Delay_nms(200);
LCD_WR_REG(0x0010,0x17b0);
LCD_WR_REG(0x0011,0x0137);
Delay_nms(50);
LCD_WR_REG(0x0012,0x0139);
Delay_nms(50);
LCD_WR_REG(0x0013,0x1700);
LCD_WR_REG(0x0029,0x0000);
LCD_WR_REG(0x002b,0x0000);
Delay_nms(50);
#if ID_AM==000
LCD_WR_REG(0x0020,0x00ef);
LCD_WR_REG(0x0021,0x013f);
#elif ID_AM==001
LCD_WR_REG(0x0020,0x00ef);
LCD_WR_REG(0x0021,0x013f);
#elif ID_AM==010
LCD_WR_REG(0x0020,0x0000);
LCD_WR_REG(0x0021,0x013f);
#elif ID_AM==011
LCD_WR_REG(0x0020,0x0000);
LCD_WR_REG(0x0021,0x013f);
#elif ID_AM==100
LCD_WR_REG(0x0020,0x00ef);
LCD_WR_REG(0x0021,0x0000);
#elif ID_AM==101
LCD_WR_REG(0x0020,0x00ef);
LCD_WR_REG(0x0021,0x0000);
#elif ID_AM==110
LCD_WR_REG(0x0020,0x0000);
LCD_WR_REG(0x0021,0x0000);
#elif ID_AM==111
LCD_WR_REG(0x0020,0x0000);
LCD_WR_REG(0x0021,0x0000);
#endif
LCD_WR_REG(0x0030,0x0000);
LCD_WR_REG(0x0031,0x0507);
LCD_WR_REG(0x0032,0x0104);
LCD_WR_REG(0x0035,0x0105);
LCD_WR_REG(0x0036,0x0404);
LCD_WR_REG(0x0037,0x0603);
LCD_WR_REG(0x0038,0x0004);
LCD_WR_REG(0x0039,0x0007);
LCD_WR_REG(0x003c,0x0501);
LCD_WR_REG(0x003d,0x0404);
LCD_WR_REG(0x0050,0x0000);
LCD_WR_REG(0x0051,0x00ef);
LCD_WR_REG(0x0052,0x0000);
LCD_WR_REG(0x0053,0x013f);
#ifdef ILI9325
LCD_WR_REG(0x0060,0xa700);//G
#endif
#ifdef ILI9320
LCD_WR_REG(0x0060,0x2700);//G
#endif
LCD_WR_REG(0x0061,0x0001);//Enables the grayscale inversion of the image by setting REV=1.??????????????????????????????
LCD_WR_REG(0x006a,0x0000);
LCD_WR_REG(0x0080,0x0000);
LCD_WR_REG(0x0081,0x0000);
LCD_WR_REG(0x0082,0x0000);
LCD_WR_REG(0x0083,0x0000);
LCD_WR_REG(0x0084,0x0000);
LCD_WR_REG(0x0085,0x0000);
LCD_WR_REG(0x0090,0x0010);
LCD_WR_REG(0x0092,0x0000);
LCD_WR_REG(0x0093,0x0003);
LCD_WR_REG(0x0095,0x0110);
LCD_WR_REG(0x0097,0x0000);
LCD_WR_REG(0x0098,0x0000);
LCD_WR_REG(0x0007,0x0130);
#ifdef Immediately
LCD_WR_REG(0x0007,0x0173);
#endif
*/
i = CheckController();
q=i;
if(i==0x9325||i==0x9328)
{
LCD_WR_REG(0x00e7,0x0010);
LCD_WR_REG(0x0000,0x0001); //start internal osc
LCD_WR_REG(0x0001,0x0100);
LCD_WR_REG(0x0002,0x0700); //power on sequence
LCD_WR_REG(0x0003,(1<<12)|(1<<5)|(1<<4) ); //65K
LCD_WR_REG(0x0004,0x0000);
LCD_WR_REG(0x0008,0x0207);
LCD_WR_REG(0x0009,0x0000);
LCD_WR_REG(0x000a,0x0000); //display setting
LCD_WR_REG(0x000c,0x0001); //display setting
LCD_WR_REG(0x000d,0x0000); //0f3c
LCD_WR_REG(0x000f,0x0000);
LCD_WR_REG(0x0010,0x0000);
LCD_WR_REG(0x0011,0x0007);
LCD_WR_REG(0x0012,0x0000);
LCD_WR_REG(0x0013,0x0000);
for(i=50000;i>0;i--);
LCD_WR_REG(0x0010,0x1590);
LCD_WR_REG(0x0011,0x0227);
for(i=50000;i>0;i--);
LCD_WR_REG(0x0012,0x009c);
for(i=50000;i>0;i--);
LCD_WR_REG(0x0013,0x1900);
LCD_WR_REG(0x0029,0x0023);
LCD_WR_REG(0x002b,0x000e);
for(i=50000;i>0;i--);
LCD_WR_REG(0x0020,0x0000);
LCD_WR_REG(0x0021,0x0000);
for(i=50000;i>0;i--);
LCD_WR_REG(0x0030,0x0007);
LCD_WR_REG(0x0031,0x0707);
LCD_WR_REG(0x0032,0x0006);
LCD_WR_REG(0x0035,0x0704);
LCD_WR_REG(0x0036,0x1f04);
LCD_WR_REG(0x0037,0x0004);
LCD_WR_REG(0x0038,0x0000);
LCD_WR_REG(0x0039,0x0706);
LCD_WR_REG(0x003c,0x0701);
LCD_WR_REG(0x003d,0x000f);
for(i=50000;i>0;i--);
LCD_WR_REG(0x0050,0x0000);
LCD_WR_REG(0x0051,0x00ef);
LCD_WR_REG(0x0052,0x0000);
LCD_WR_REG(0x0053,0x013f);
LCD_WR_REG(0x0060,0xa700);
LCD_WR_REG(0x0061,0x0001);
LCD_WR_REG(0x006a,0x0000);
LCD_WR_REG(0x0080,0x0000);
LCD_WR_REG(0x0081,0x0000);
LCD_WR_REG(0x0082,0x0000);
LCD_WR_REG(0x0083,0x0000);
LCD_WR_REG(0x0084,0x0000);
LCD_WR_REG(0x0085,0x0000);
LCD_WR_REG(0x0090,0x0010);
LCD_WR_REG(0x0092,0x0000);
LCD_WR_REG(0x0093,0x0003);
LCD_WR_REG(0x0095,0x0110);
LCD_WR_REG(0x0097,0x0000);
LCD_WR_REG(0x0098,0x0000);
//display on sequence
LCD_WR_REG(0x0007,0x0133);
LCD_WR_REG(0x0020,0x0000);
LCD_WR_REG(0x0021,0x0000);
}
else if(i==0x9320)
{
LCD_WR_REG(0x00,0x0000);
LCD_WR_REG(0x01,0x0100); //Driver Output Contral.
LCD_WR_REG(0x02,0x0700); //LCD Driver Waveform Contral.
LCD_WR_REG(0x03,0x1030); //Entry Mode Set.
LCD_WR_REG(0x04,0x0000); //Scalling Contral.
LCD_WR_REG(0x08,0x0202); //Display Contral 2.(0x0207)
LCD_WR_REG(0x09,0x0000); //Display Contral 3.(0x0000)
LCD_WR_REG(0x0a,0x0000); //Frame Cycle Contal.(0x0000)
LCD_WR_REG(0x0c,(1<<0)); //Extern Display Interface Contral 1.(0x0000)
LCD_WR_REG(0x0d,0x0000); //Frame Maker Position.
LCD_WR_REG(0x0f,0x0000); //Extern Display Interface Contral 2.
for(i=50000;i>0;i--);
LCD_WR_REG(0x07,0x0101); //Display Contral.
for(i=50000;i>0;i--);
LCD_WR_REG(0x10,(1<<12)|(0<<8)|(1<<7)|(1<<6)|(0<<4)); //Power Control 1.(0x16b0)
LCD_WR_REG(0x11,0x0007); //Power Control 2.(0x0001)
LCD_WR_REG(0x12,(1<<8)|(1<<4)|(0<<0)); //Power Control 3.(0x0138)
LCD_WR_REG(0x13,0x0b00); //Power Control 4.
LCD_WR_REG(0x29,0x0000); //Power Control 7.
LCD_WR_REG(0x2b,(1<<14)|(1<<4));
LCD_WR_REG(0x50,0); //Set X Start.
LCD_WR_REG(0x51,239); //Set X End.
LCD_WR_REG(0x52,0); //Set Y Start.
LCD_WR_REG(0x53,319); //Set Y End.
LCD_WR_REG(0x60,0x2700); //Driver Output Control.
LCD_WR_REG(0x61,0x0001); //Driver Output Control.
LCD_WR_REG(0x6a,0x0000); //Vertical Srcoll Control.
LCD_WR_REG(0x80,0x0000); //Display Position? Partial Display 1.
LCD_WR_REG(0x81,0x0000); //RAM Address Start? Partial Display 1.
LCD_WR_REG(0x82,0x0000); //RAM Address End-Partial Display 1.
LCD_WR_REG(0x83,0x0000); //Displsy Position? Partial Display 2.
LCD_WR_REG(0x84,0x0000); //RAM Address Start? Partial Display 2.
LCD_WR_REG(0x85,0x0000); //RAM Address End? Partial Display 2.
LCD_WR_REG(0x90,(0<<7)|(16<<0)); //Frame Cycle Contral.(0x0013)
LCD_WR_REG(0x92,0x0000); //Panel Interface Contral 2.(0x0000)
LCD_WR_REG(0x93,0x0001); //Panel Interface Contral 3.
LCD_WR_REG(0x95,0x0110); //Frame Cycle Contral.(0x0110)
LCD_WR_REG(0x97,(0<<8)); //
LCD_WR_REG(0x98,0x0000); //Frame Cycle Contral.
LCD_WR_REG(0x07,0x0173); //(0x0173)
}
}
void Lcd_WR_Start(void)
{
Clr_Cs;
Clr_Rs;
Set_nRd;
DataToWrite(0x0022);
Clr_nWr;
Set_nWr;
Set_Rs;
}
void Lcd_SetCursor(u8 x,u16 y)
{
LCD_WR_REG(0x20,x);
LCD_WR_REG(0x21,y);
}
void Lcd_Clear(u16 Color)
{
u32 temp;
Lcd_SetCursor(0x00, 0x0000);
LCD_WR_REG(0x0050,0x00);
LCD_WR_REG(0x0051,239);
LCD_WR_REG(0x0052,0x00);
LCD_WR_REG(0x0053,319);
Lcd_WR_Start();
Set_Rs;
for (temp = 0; temp < 76800; temp++)
{
DataToWrite(Color);
Clr_nWr;
Set_nWr;
}
Set_Cs;
}
void Lcd_SetBox(u8 xStart,u16 yStart,u8 xLong,u16 yLong,u16 x_offset,u16 y_offset)
{
#if ID_AM==000
Lcd_SetCursor(xStart+xLong-1+x_offset,yStart+yLong-1+y_offset);
#elif ID_AM==001
Lcd_SetCursor(xStart+xLong-1+x_offset,yStart+yLong-1+y_offset);
#elif ID_AM==010
Lcd_SetCursor(xStart+x_offset,yStart+yLong-1+y_offset);
#elif ID_AM==011
Lcd_SetCursor(xStart+x_offset,yStart+yLong-1+y_offset);
#elif ID_AM==100
Lcd_SetCursor(xStart+xLong-1+x_offset,yStart+y_offset);
#elif ID_AM==101
Lcd_SetCursor(xStart+xLong-1+x_offset,yStart+y_offset);
#elif ID_AM==110
Lcd_SetCursor(xStart+x_offset,yStart+y_offset);
#elif ID_AM==111
Lcd_SetCursor(xStart+x_offset,yStart+y_offset);
#endif
LCD_WR_REG(0x0050,xStart+x_offset);
LCD_WR_REG(0x0051,xStart+xLong-1+x_offset);
LCD_WR_REG(0x0052,yStart+y_offset);
LCD_WR_REG(0x0053,yStart+yLong-1+y_offset);
}
void Lcd_ColorBox(u8 xStart,u16 yStart,u8 xLong,u16 yLong,u16 Color)
{
u32 temp;
Lcd_SetBox(xStart,yStart,xLong,yLong,0,0);
Lcd_WR_Start();
Set_Rs;
for (temp=0; temp<xLong*yLong; temp++)
{
DataToWrite(Color);
Clr_nWr;
Set_nWr;
}
Set_Cs;
}
void Lcd_ClearCharBox(u8 x,u16 y,u16 Color)
{
u32 temp;
Lcd_SetBox(x*8,y*16,8,16,0,0);
Lcd_WR_Start();
Set_Rs;
for (temp=0; temp < 128; temp++)
{
DataToWrite(Color);
Clr_nWr;
//Delay_nus(22);
Set_nWr;
}
Set_Cs;
}
void Delay_nms(int n)
{
u32 f=n,k;
for (; f!=0; f--)
{
for(k=0xFFF; k!=0; k--);
}
}
void DrawPixel(u16 x, u16 y, int Color)
{
Lcd_SetCursor(x,y);
Lcd_WR_Start();
Set_Rs;
DataToWrite(Color);
Clr_nWr;
Set_nWr;
Set_Cs;
}
void DispPic240_320(const unsigned char *str)
{
u32 temp;
ColorTypeDef color;
Lcd_SetCursor(0x00, 0x0000);
LCD_WR_REG(0x0050,0x00);
LCD_WR_REG(0x0051,239);
LCD_WR_REG(0x0052,0);
LCD_WR_REG(0x0053,319);
Lcd_WR_Start();
Set_Rs;
for (temp = 0; temp < 240*320; temp++)
{
color.U8[1] =*(unsigned short *)(&str[ 2 * temp]);
color.U8[0]=*(unsigned short *)(&str[ 2 * temp+1]);
//DataToWrite(i);
DataToWrite(color.U16);
Clr_nWr;
Set_nWr;
}
//==============================
}
void test_color(void){
u8 R_data,G_data,B_data,i,j;
Lcd_SetCursor(0x00, 0x0000);
LCD_WR_REG(0x0050,0x00);
LCD_WR_REG(0x0051,239);
LCD_WR_REG(0x0052,0);
LCD_WR_REG(0x0053,319);
Lcd_WR_Start();
Set_Rs;
R_data=0;G_data=0;B_data=0;
for(j=0;j<50;j++)
{
for(i=0;i<240;i++)
{R_data=i/8;DataToWrite(R_data<<11|G_data<<5|B_data);
Clr_nWr;Set_nWr;}
}
R_data=0x1f;G_data=0x3f;B_data=0x1f;
for(j=0;j<50;j++)
{
for(i=0;i<240;i++)
{
G_data=0x3f-(i/4);
B_data=0x1f-(i/8);
DataToWrite(R_data<<11|G_data<<5|B_data);
Clr_nWr;
Set_nWr;
}
}
//----------------------------------
R_data=0;G_data=0;B_data=0;
for(j=0;j<50;j++)
{
for(i=0;i<240;i++)
{G_data=i/4;
DataToWrite(R_data<<11|G_data<<5|B_data);
Clr_nWr;
Set_nWr;}
}
R_data=0x1f;G_data=0x3f;B_data=0x1f;
for(j=0;j<50;j++)
{
for(i=0;i<240;i++)
{
R_data=0x1f-(i/8);
B_data=0x1f-(i/8);
DataToWrite(R_data<<11|G_data<<5|B_data);
Clr_nWr;
Set_nWr;
}
}
//----------------------------------
R_data=0;G_data=0;B_data=0;
for(j=0;j<60;j++)
{
for(i=0;i<240;i++)
{B_data=i/8;DataToWrite(R_data<<11|G_data<<5|B_data);
Clr_nWr;
Set_nWr;}
}
B_data=0;
R_data=0x1f;G_data=0x3f;B_data=0x1f;
for(j=0;j<60;j++)
{
for(i=0;i<240;i++)
{
G_data=0x3f-(i/4);
R_data=0x1f-(i/8);
DataToWrite(R_data<<11|G_data<<5|B_data);
Clr_nWr;
Set_nWr;
}
}
Set_Cs;
}
All pins of the LCD are connected to MCU and supply like this schematic:
VCC-------->3.3v
GND-------->GND
LED_VCC---->3.3v
LED_GND---->GND
Y(-)------->not connected
Y(+)------->not connected
X(-)------->not connected
X(+)------->not connected
IM0-------->not connected
RD--------->PC13
WR--------->PC10
RS--------->PC9
CS--------->PC8
RSt-------->PC12
(D1-D8)---->(PC0-PC7)
(D10-D17)-->(PB8-PB15)
As you can see its interface is 16bit. for 16bit interface, if you see page 10 of ILI9325's datasheet you will see this:
And page 26:
But lone IM[3:0]
pin that I can see is IM0
. by the way I think my circuit should work but when I trun on the circuit, lone thing that I can see is this:
Just a white background! damn it! What's the problem? in your opinion why doesn't my circuit(LCD) work?
Best Answer
There may be a thousand reasons why the LCD is not working.
It could be one of these for starters:
I can tell you from direct experience that it is a rare day that firing up a new LCD module, particularly graphics ones, will just start working. It can be a slow and painstaking process.
One of the first things that you have to do is to work at a very low level and make sure that all the interface signals look good and have correct timing.
Next try to convince yourself that you are actually communicating with the display controller. This can sometimes be done by writing some register and then reading it back to see that the written bit values come back. Other times it may be necessary to write one register and then read back the BUSY status to see that it toggles to BUSY and then back to not busy.