A program that records images from the OV7670 camera and displays them on a SPI TFT display. Working at 15fps
Dependencies: mbed TFT_fonts_old
Diff: main.cpp
- Revision:
- 1:c98598814170
- Parent:
- 0:aabbf2286bf2
--- a/main.cpp Tue Mar 27 19:10:18 2012 +0000 +++ b/main.cpp Sat Mar 31 10:05:59 2012 +0000 @@ -14,16 +14,20 @@ OV7670 camera( p28,p27, // SDA,SCL(I2C / SCCB) p21,p22,p20, // VSYNC,HREF,WEN(FIFO) - p19,p18,p17,p16,p15,p14,p13,p12, // D7-D0 + Port0,0x07800033, p23,p24,p25) ; // RRST,OE,RCLK // the TFT is connected to SPI pin 5-7 -SPI_TFT TFT(p5, p6, p7, p8, p9,"TFT"); // mosi, miso, sclk, cs, reset +SPI_TFT TFT(p5, p6, p7, p8, p14,"TFT"); // mosi, miso, sclk, cs, reset Serial pc(USBTX,USBRX); #define SIZEX (160) #define SIZEY (120) +#define SIZE 19200 + +unsigned char bank0 [SIZE]; +unsigned char *bank1 = (unsigned char *)(0x2007C000); int main() { @@ -35,72 +39,50 @@ TFT.set_font((unsigned char*) Arial12x12); // Select the font TFT.set_orientation(3); // Select orientation - printf("Testing..."); - - int i ; - pc.baud(115200) ; - pc.printf("Camera resetting..\r\n") ; - + // Reset camera on power up camera.Reset() ; - pc.printf("Before Init...\r\n") ; - pc.printf("AD : +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F") ; - for (i=0; i<OV7670_REGMAX; i++) { - int data ; - data = camera.ReadReg(i) ; // READ REG - if ((i & 0x0F) == 0) { - pc.printf("\r\n%02X : ",i) ; - } - pc.printf("%02X ",data) ; - } - pc.printf("\r\n") ; - + // Set up for 160*120 pixels RGB565 camera.InitQQVGA() ; + + // Print message to screen + pc.printf("Hit Any Key to stop RGBx160x120 Capture Data.\r\n"); + + // Kick things off by capturing an image + camera.CaptureNext() ; + while (camera.CaptureDone() == false) ; - pc.printf("After Init...\r\n") ; - pc.printf("AD : +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F") ; - for (i=0; i<OV7670_REGMAX; i++) { - int data ; - data = camera.ReadReg(i) ; // READ REG - if ((i & 0x0F) == 0) { - pc.printf("\r\n%02X : ",i) ; + // Now enter the main loop + while (!pc.readable()) { + + // Start reading in the image data from the camera hardware buffer + camera.ReadStart(); + + // Read in the first half of the image + for (int i = 0; i < SIZE; i++) { + bank0[i] = camera.ReadOneByte(); } - pc.printf("%02X ",data) ; - } - pc.printf("\r\n") ; - // CAPTURE and SEND LOOP - while (1) { - pc.printf("Hit Any Key to send RGBx160x120 Capture Data.\r\n") ; - while (!pc.readable()) ; - pc.getc() ; + // Read in the second half of the image + for (int i = 0; i < SIZE ; i++) { + bank1[i] = camera.ReadOneByte(); + } + + // Stop reading the image + camera.ReadStop() ; + + // Immediately request the next image to be captured (takes around 45ms) camera.CaptureNext() ; - while (camera.CaptureDone() == false) ; - pc.printf("*\r\n") ; - camera.ReadStart() ; - i = 0 ; - int colour; - for (int y = 0; y < SIZEY; y++) { - int r,g,b,d1,d2 ; - for (int x = 0; x < SIZEX; x++) { - d1 = camera.ReadOneByte() ; // upper nibble is XXX , lower nibble is B - d2 = camera.ReadOneByte() ; // upper nibble is G , lower nibble is R - b = (d1 & 0x0F) ; - g = (d2 & 0xF0) >> 4 ; - r = (d2 & 0x0F) ; - pc.printf ("%1X%1X%1X",r,g,b) ; - - // Calculate colour - colour = r << 11; - colour += g << 5; - colour += b; - - // Display pixel on TFT screen - TFT.pixel(x, y, colour); - } - pc.printf("\r\n") ; - } - camera.ReadStop() ; + // Use this time to display the image on the screen + // Display the top half + TFT.Bitmap(0,0,160,60,bank1); + // Display the bottom half + TFT.Bitmap(0,60,160,60,bank0); + + /* Note: we still have around 15ms left here to do other stuff */ + + // Now wait for the image to finish being captured + while (camera.CaptureDone() == false) ; } }