hmm, good point 
I didn't think the hex colour values for the whole image would do me much good (because I have no idea how to go about translating them), but i tried saving the r5 g6 b5 values to the SD like this:
void writeBMP(File outFile){
char VH, VL;
uint8_t temp,temp_last;
int i, j, posn, nextNum;
unsigned int r5, g6, b5;
//Write the BMP header
for( i = 0; i < 54; i++)
{
char ch = pgm_read_byte(&bmp_header[i]);
outFile.write((uint8_t*)&ch,1);
}
//Read the first dummy byte from FIFO
temp = myCAM1.read_fifo();
//Read 320x240x2 byte from FIFO
for(i = 0; i < 240; i++)
for(j = 0; j < 320; j++)
{
VH = myCAM1.read_fifo();
VL = myCAM1.read_fifo();
b5 = VH & 0x1F;
g6 = ((VH & 0xE0) >> 5 | (VL & 0x03) << 3) & 0x3F;
r5 = (VL >> 3) & 0x1F;
//Write image data to file
outFile.write(b5);
outFile.write(g6);
outFile.write(r5);
}
Interestingly, it only worked with the 24-bit header to give IMAGE01.bmp (I assume this has something to do with the way it saves -- The 16-bit header gave green and blue garbage). The image is darkened, but still has the magenta staining issue. IMAGE02.bmp shows the result with the original scaling code. Any ideas? Have I got the bits wrong or am I shifting them the incorrect amount?
