I recently purchased an arduino for my school project and want to display pictures on it. I cannot really get started, because when i start the example Sketch (show bmp picture) my screen turns white and does nothing.
As far as a i know examples should work from begin, since every other example works, just not the show bmp from micro sd. I use a micro SD fat 32 and converted my picture to my 320x480 resolution. I also installed all the librarys and theres no error while compiling. Is there maybe any basic step i dont know about, what has to be done, when you're getting started?
The code:
#include <SD.h>
#include <SPI.h>
#include <LCDWIKI_GUI.h> //Core graphics library
#include <LCDWIKI_KBV.h> //Hardware-specific library
//the definiens of 16bit mode as follow:
//if the IC model is known or the modules is unreadable,you can use this constructed function
LCDWIKI_KBV my_lcd(ILI9486,40,38,39,-1,41); //model,cs,cd,wr,rd,reset
#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF
#define PIXEL_NUMBER (my_lcd.Get_Display_Width()/4)
#define FILE_NUMBER 4
#define FILE_NAME_SIZE_MAX 20
uint32_t bmp_offset = 0;
uint16_t s_width = my_lcd.Get_Display_Width();
uint16_t s_heigh = my_lcd.Get_Display_Height();
//int16_t PIXEL_NUMBER;
char file_name[FILE_NUMBER][FILE_NAME_SIZE_MAX];
uint16_t read_16(File fp)
{
uint8_t low;
uint16_t high;
low = fp.read();
high = fp.read();
return (high<<8)|low;
}
uint32_t read_32(File fp)
{
uint16_t low;
uint32_t high;
low = read_16(fp);
high = read_16(fp);
return (high<<8)|low;
}
bool analysis_bpm_header(File fp)
{
if(read_16(fp) != 0x4D42)
{
return false;
}
//get bpm size
read_32(fp);
//get creator information
read_32(fp);
//get offset information
bmp_offset = read_32(fp);
//get DIB infomation
read_32(fp);
//get width and heigh information
uint32_t bpm_width = read_32(fp);
uint32_t bpm_heigh = read_32(fp);
if((bpm_width != s_width) || (bpm_heigh != s_heigh))
{
return false;
}
if(read_16(fp) != 1)
{
return false;
}
read_16(fp);
if(read_32(fp) != 0)
{
return false;
}
return true;
}
void draw_bmp_picture(File fp)
{
uint16_t i,j,k,l,m=0;
uint8_t bpm_data[PIXEL_NUMBER*3] = {0};
uint16_t bpm_color[PIXEL_NUMBER];
fp.seek(bmp_offset);
for(i = 0;i < s_heigh;i++)
{
for(j = 0;j<s_width/PIXEL_NUMBER;j++)
{
m = 0;
fp.read(bpm_data,PIXEL_NUMBER*3);
for(k = 0;k<PIXEL_NUMBER;k++)
{
bpm_color[k]= my_lcd.Color_To_565(bpm_data[m+2], bpm_data[m+1], bpm_data[m+0]);
m +=3;
}
for(l = 0;l<PIXEL_NUMBER;l++)
{
my_lcd.Set_Draw_color(bpm_color[l]);
my_lcd.Draw_Pixel(j*PIXEL_NUMBER+l,i);
}
}
}
}
void setup()
{
Serial.begin(9600);
my_lcd.Init_LCD();
my_lcd.Fill_Screen(BLUE);
//s_width = my_lcd.Get_Display_Width();
//s_heigh = my_lcd.Get_Display_Height();
//PIXEL_NUMBER = my_lcd.Get_Display_Width()/4;
if(PIXEL_NUMBER == 60)
{
strcpy(file_name[0],"flower.bmp");
strcpy(file_name[1],"tiger.bmp");
strcpy(file_name[2],"tree.bmp");
strcpy(file_name[3],"RedRose.bmp");
}
else
{
strcpy(file_name[0],"01.bmp");
strcpy(file_name[1],"02.bmp");
strcpy(file_name[2],"03.bmp");
strcpy(file_name[3],"04.bmp");
}
//Init SD_Card
pinMode(53, OUTPUT);
if (!SD.begin(53))
{
my_lcd.Set_Text_Back_colour(BLUE);
my_lcd.Set_Text_colour(WHITE);
my_lcd.Set_Text_Size(1);
my_lcd.Print_String("SD Card Init fail!",0,0);
}
}
void loop()
{
int i = 0;
File bmp_file;
for(i = 0;i<FILE_NUMBER;i++)
{
bmp_file = SD.open(file_name[i]);
if(!bmp_file)
{
my_lcd.Set_Text_Back_colour(BLUE);
my_lcd.Set_Text_colour(WHITE);
my_lcd.Set_Text_Size(1);
my_lcd.Print_String("didnt find BMPimage!",0,10);
while(1);
}
if(!analysis_bpm_header(bmp_file))
{
my_lcd.Set_Text_Back_colour(BLUE);
my_lcd.Set_Text_colour(WHITE);
my_lcd.Set_Text_Size(1);
my_lcd.Print_String("bad bmp picture!",0,0);
return;
}
draw_bmp_picture(bmp_file);
bmp_file.close();
delay(2000);
}
}
/code
link to my shield: http://www.lcdwiki.com/3.5inch_Arduino_Display-UNO
Libraries: Adafruit_GFX, Adafruit_TFTLCD, MCUFRIEND_kbv + preinstalled by arduino