I did read through that topic, and while it was interesting and helped me get a better idea of some of the coding it didn't help with the issue I'm having. I actually posted a reply in that topic with a suggestion for making a change to the HacroCam's firmware to get the camera to take pictures in greyscale rather than RGB.
I realize that it's kind of a pain to have to download, unzip, and go over a bunch of new code so instead I'll post the gist of it here. So here's the original Arduino sketch provided by Hacromatic, minus the functions that make a lot of it work:
#include "HacroCam.h"
#include <avr/pgmspace.h>
#define NUM_HACROCAMS 8
byte g_debug = 0;
const byte g_bufsize = 32;
byte g_bufpos = 0;
char g_buf[g_bufsize];
byte g_nextcam = 0;
HacroCam hcams[NUM_HACROCAMS];
byte g_camidx = 0xff;
static PROGMEM prog_uint8_t crc_table[256] =
{
0x00, 0x2f, 0x5e, 0x71, 0xbc, 0x93, 0xe2, 0xcd, 0x57, 0x78, 0x09, 0x26, 0xeb, 0xc4, 0xb5, 0x9a,
0xae, 0x81, 0xf0, 0xdf, 0x12, 0x3d, 0x4c, 0x63, 0xf9, 0xd6, 0xa7, 0x88, 0x45, 0x6a, 0x1b, 0x34,
0x73, 0x5c, 0x2d, 0x02, 0xcf, 0xe0, 0x91, 0xbe, 0x24, 0x0b, 0x7a, 0x55, 0x98, 0xb7, 0xc6, 0xe9,
0xdd, 0xf2, 0x83, 0xac, 0x61, 0x4e, 0x3f, 0x10, 0x8a, 0xa5, 0xd4, 0xfb, 0x36, 0x19, 0x68, 0x47,
0xe6, 0xc9, 0xb8, 0x97, 0x5a, 0x75, 0x04, 0x2b, 0xb1, 0x9e, 0xef, 0xc0, 0x0d, 0x22, 0x53, 0x7c,
0x48, 0x67, 0x16, 0x39, 0xf4, 0xdb, 0xaa, 0x85, 0x1f, 0x30, 0x41, 0x6e, 0xa3, 0x8c, 0xfd, 0xd2,
0x95, 0xba, 0xcb, 0xe4, 0x29, 0x06, 0x77, 0x58, 0xc2, 0xed, 0x9c, 0xb3, 0x7e, 0x51, 0x20, 0x0f,
0x3b, 0x14, 0x65, 0x4a, 0x87, 0xa8, 0xd9, 0xf6, 0x6c, 0x43, 0x32, 0x1d, 0xd0, 0xff, 0x8e, 0xa1,
0xe3, 0xcc, 0xbd, 0x92, 0x5f, 0x70, 0x01, 0x2e, 0xb4, 0x9b, 0xea, 0xc5, 0x08, 0x27, 0x56, 0x79,
0x4d, 0x62, 0x13, 0x3c, 0xf1, 0xde, 0xaf, 0x80, 0x1a, 0x35, 0x44, 0x6b, 0xa6, 0x89, 0xf8, 0xd7,
0x90, 0xbf, 0xce, 0xe1, 0x2c, 0x03, 0x72, 0x5d, 0xc7, 0xe8, 0x99, 0xb6, 0x7b, 0x54, 0x25, 0x0a,
0x3e, 0x11, 0x60, 0x4f, 0x82, 0xad, 0xdc, 0xf3, 0x69, 0x46, 0x37, 0x18, 0xd5, 0xfa, 0x8b, 0xa4,
0x05, 0x2a, 0x5b, 0x74, 0xb9, 0x96, 0xe7, 0xc8, 0x52, 0x7d, 0x0c, 0x23, 0xee, 0xc1, 0xb0, 0x9f,
0xab, 0x84, 0xf5, 0xda, 0x17, 0x38, 0x49, 0x66, 0xfc, 0xd3, 0xa2, 0x8d, 0x40, 0x6f, 0x1e, 0x31,
0x76, 0x59, 0x28, 0x07, 0xca, 0xe5, 0x94, 0xbb, 0x21, 0x0e, 0x7f, 0x50, 0x9d, 0xb2, 0xc3, 0xec,
0xd8, 0xf7, 0x86, 0xa9, 0x64, 0x4b, 0x3a, 0x15, 0x8f, 0xa0, 0xd1, 0xfe, 0x33, 0x1c, 0x6d, 0x42
};
void setup()
{
Serial.begin(230400);
}
void loop()
{
byte available = Serial.available();
if (available)
{
byte freespace = g_bufsize-g_bufpos;
byte toread = (available > freespace) ? freespace : available;
for (byte i = 0; i < toread; ++i)
{
byte b = Serial.read();
if (b == '\r')
{
processMessage();
}
else if (b == '\n')
{
if (g_bufpos)
processMessage();
}
else
{
if (g_debug && (b == 127 || b == 8))
{
if (g_bufpos)
{
Serial.write(8);
g_buf[--g_bufpos] = 0;
}
}
else
{
if (g_debug)
Serial.print((char)b);
g_buf[g_bufpos++] = b;
}
}
}
if (g_bufpos == g_bufsize)
{
if (g_debug)
Serial.println("buffer overflow");
// Something bad happened, and we'll never execute another command
// because the buffer is full and yet doesn't contain a complete
// command. The only reasonable thing to do here, besides halt, is
// to clear the buffer.
clearBuffer();
}
}
}
And here's the Arduino code given in the Line Drawings tutorial:
#include "HacroCam.h"
HacroCam hcam;
void setup()
{
hcam.begin();
hcam.setReadAddress(0x0);
hcam.setWriteAddress(0x0);
hcam.setCaptureMode(HacroCam::RGB320x240);
uint8_t wait = hcam.capture();
delay(1000UL*wait + 8000UL);
}
void loop()
{
}
Obviously the second code block is much simpler since it's only designed to give the HacroCam a quick set of parameters, then take an image and wait for a while. The bigger problem is that the first code block uses an array of hcams[] objects while the second uses a single hcam object. So am I just making this a lot harder than it needs to be? Should I just be able to use the stock Arduino sketch to access my HacroCam with modified firmware?