main.cpp

00001 //
00002 // OV7670 + FIFO AL422B camera board test
00003 //
00004 #include "mbed.h"
00005 #include "ov7670.h"
00006 #include "stdio.h"
00007 #include "SPI_TFT.h"
00008 #include "string"
00009 #include "Arial12x12.h"
00010 #include "Arial24x23.h"
00011 #include "Arial28x28.h"
00012 #include "font_big.h"
00013 
00014 OV7670 camera(
00015     p28,p27,       // SDA,SCL(I2C / SCCB)
00016     p21,p22,p20,   // VSYNC,HREF,WEN(FIFO)
00017     Port0,0x07800033,
00018     p23,p24,p25) ; // RRST,OE,RCLK
00019 
00020 // the TFT is connected to SPI pin 5-7
00021 SPI_TFT TFT(p5, p6, p7, p8, p14,"TFT"); // mosi, miso, sclk, cs, reset
00022 
00023 Serial pc(USBTX,USBRX);
00024 
00025 #define SIZEX (160)
00026 #define SIZEY (120)
00027 #define SIZE 19200
00028 
00029 unsigned char bank0 [SIZE];
00030 unsigned char *bank1 = (unsigned char *)(0x2007C000);
00031 
00032 int main() {
00033 
00034     // Set up the TFT
00035     TFT.claim(stdout);                          // Send stdout to the TFT display
00036     TFT.background(Black);                      // Set background to black
00037     TFT.foreground(White);                      // Set chars to white
00038     TFT.cls();                                  // Clear the screen
00039     TFT.set_font((unsigned char*) Arial12x12);  // Select the font
00040     TFT.set_orientation(3);                     // Select orientation
00041 
00042     // Reset camera on power up
00043     camera.Reset() ;
00044 
00045     // Set up for 160*120 pixels RGB565
00046     camera.InitQQVGA() ;
00047     
00048     // Print message to screen
00049     pc.printf("Hit Any Key to stop RGBx160x120 Capture Data.\r\n");
00050           
00051     // Kick things off by capturing an image
00052     camera.CaptureNext() ;
00053     while (camera.CaptureDone() == false) ;
00054 
00055     // Now enter the main loop
00056     while (!pc.readable()) {
00057 
00058         // Start reading in the image data from the camera hardware buffer                   
00059         camera.ReadStart();
00060 
00061         // Read in the first half of the image
00062         for (int i = 0; i < SIZE; i++) {
00063             bank0[i] =  camera.ReadOneByte();
00064         }
00065 
00066         // Read in the second half of the image
00067         for (int i = 0; i < SIZE ; i++) {
00068             bank1[i] =  camera.ReadOneByte();
00069         }  
00070         
00071         // Stop reading the image
00072         camera.ReadStop() ; 
00073         
00074         // Immediately request the next image to be captured (takes around 45ms)
00075         camera.CaptureNext() ;
00076         
00077         // Use this time to display the image on the screen
00078         // Display the top half
00079         TFT.Bitmap(0,0,160,60,bank1);
00080         // Display the bottom half
00081         TFT.Bitmap(0,60,160,60,bank0);
00082         
00083         /* Note: we still have around 15ms left here to do other stuff */
00084         
00085         // Now wait for the image to finish being captured
00086         while (camera.CaptureDone() == false) ;
00087     }
00088 }