Joseph Bradshaw
mbed serial interface for the OV528 camera (uCAM TTL 120 from 4D systems).
Dependents: mbed_uCAM_TTL120_20141118
Library for interfacing the mbed to the OV528 jpeg engine camera from Omnivision. I tested this program using the uCAM TTL 120 from 4D systems, now obsolete.
Above is a saved jpeg image from the camera at 480x640 resolution
Camera and TFT screen setup
Closeup of the TFT screen displaying a 60x80 pixel 16 bit color bitmap image. The RGB (565) pixel colors were reversed when read from the camera relative to the TFT screen so a bit mask and shift had to be applied when displaying the pixel color.
bit mask and shift
int k=12;
for(int i=0;i<60;i++){
for(int j=0;j<80;j++){
//returned 16-bit color is 565(RGB)
pixel_col = (imageData[k] << 8);
k++;
pixel_col += imageData[k];
k++;
// fputc(((picture[k] >> 8) & 0xff), fp); //write pixel high byte to file
// fputc(picture[k] & 0xff, fp); //write low byte
//swap R and B bits in returned pixel for TFT display
int TFT_pix_col = 0;
TFT_pix_col += (pixel_col & 0x001f) << 11;
TFT_pix_col += (pixel_col & 0xf800) >> 11;
TFT_pix_col += (pixel_col & 0x07e0);
TFT.pixel(j, i, TFT_pix_col); //Do something with the pixel
}
}