int main(void)
{
uint8_t addr1, addr2; /* i2c addresses */
uint16_t x, y;
char buf[128]; /* temporary string buffer for various stuff */
/* uart stuff */
char rcvbuf[32], c;
uint8_t rcvbufpos = 0;
init_board();
ov7670_init();
printf("Camtest says hi!\n");
printf("System clock: [%d]\n", SystemCoreClock);
UART0_PrintString("Camtest says hi!\r\n");
while (1) {
c = UART0_Getchar();
if (c == EOF) {
continue;
} else if ((c >= 32) && (c <= 126)) {
rcvbuf[rcvbufpos++] = c;
} else if (c == 13) {
rcvbuf[rcvbufpos++] = 0;
rcvbufpos = 0;
if (strcmp(rcvbuf, "getimage") == 0) {
ov7670_readframe();
UART0_PrintString("OK\r\n");
} else if (strlen(rcvbuf) >= 9 &&
strncmp(rcvbuf, "getline ", 8) == 0) {
y = atoi(rcvbuf + 8);
for (x = 0; x < 160; x ++) {
UART0_Sendchar(qqvgaframe1[x + (y * 160)]);
UART0_Sendchar(qqvgaframe2[x + (y * 160)]);
}
} else if (strlen(rcvbuf) == 9 &&
strncmp(rcvbuf, "regr 0x", 7) == 0) {
addr1 = strtoul(rcvbuf + 7, NULL, 16);
sprintf(buf, "0x%.2x 0x%.2x\r\n", addr1, ov7670_get(addr1));
printf("%s", buf);
UART0_PrintString(buf);
} else if (strlen(rcvbuf) == 14 &&
strncmp(rcvbuf, "regw 0x", 7) == 0) {
strncpy(buf, rcvbuf + 7, 2);
buf[2] = 0;
addr1 = strtoul((char *) buf, NULL, 16);
addr2 = strtoul(rcvbuf + 12, NULL, 16);
ov7670_set(addr1, addr2);
sprintf(buf, "0x%.2x 0x%.2x\r\n", addr1, addr2);
UART0_PrintString(buf);
} else {
UART0_PrintString("ERR\r\n");
printf("Unknown command: [%s]\n", rcvbuf);
}
}
}
return 0;
}
uint8_t ov7670_init(void)
{
if (ov7670_get(REG_PID) != 0x76) {
return 0;
}
ov7670_set(REG_COM7, 0x80); /* reset to default values */
ov7670_set(REG_CLKRC, 0x80);
ov7670_set(REG_COM11, 0x0A);
ov7670_set(REG_TSLB, 0x04);
ov7670_set(REG_TSLB, 0x04);
ov7670_set(REG_COM7, 0x04); /* output format: rgb */
ov7670_set(REG_RGB444, 0x00); /* disable RGB444 */
ov7670_set(REG_COM15, 0xD0); /* set RGB565 */
/* not even sure what all these do, gonna check the oscilloscope and go
* from there... */
ov7670_set(REG_HSTART, 0x16);
ov7670_set(REG_HSTOP, 0x04);
ov7670_set(REG_HREF, 0x24);
ov7670_set(REG_VSTART, 0x02);
ov7670_set(REG_VSTOP, 0x7a);
ov7670_set(REG_VREF, 0x0a);
ov7670_set(REG_COM10, 0x02);
ov7670_set(REG_COM3, 0x04);
ov7670_set(REG_MVFP, 0x3f);
/* 160x120, i think */
//ov7670_set(REG_COM14, 0x1a); // divide by 4
//ov7670_set(0x72, 0x22); // downsample by 4
//ov7670_set(0x73, 0xf2); // divide by 4
/* 320x240: */
ov7670_set(REG_COM14, 0x19);
ov7670_set(0x72, 0x11);
ov7670_set(0x73, 0xf1);
// test pattern
//ov7670_set(0x70, 0xf0);
//ov7670_set(0x71, 0xf0);
// COLOR SETTING
ov7670_set(0x4f, 0x80);
ov7670_set(0x50, 0x80);
ov7670_set(0x51, 0x00);
ov7670_set(0x52, 0x22);
ov7670_set(0x53, 0x5e);
ov7670_set(0x54, 0x80);
ov7670_set(0x56, 0x40);
ov7670_set(0x58, 0x9e);
ov7670_set(0x59, 0x88);
ov7670_set(0x5a, 0x88);
ov7670_set(0x5b, 0x44);
ov7670_set(0x5c, 0x67);
ov7670_set(0x5d, 0x49);
ov7670_set(0x5e, 0x0e);
ov7670_set(0x69, 0x00);
ov7670_set(0x6a, 0x40);
ov7670_set(0x6b, 0x0a);
ov7670_set(0x6c, 0x0a);
ov7670_set(0x6d, 0x55);
ov7670_set(0x6e, 0x11);
ov7670_set(0x6f, 0x9f);
ov7670_set(0xb0, 0x84);
return 1;
}
int ov7670_init() {
int hstart = 456, hstop = 24, vstart = 14, vstop = 494;
unsigned char v;
if (ov7670_get(REG_PID) != 0x76) {
return 1;
}
ov7670_set(REG_COM7, COM7_RESET); /* reset to default values */
ov7670_set(REG_CLKRC, 0x01);
ov7670_set(REG_COM7, COM7_FMT_VGA | COM7_YUV); /* output format: YUCV */
ov7670_set(REG_HSTART, (hstart >> 3) & 0xff);
ov7670_set(REG_HSTOP, (hstop >> 3) & 0xff);
v = ov7670_get(REG_HREF);
v = (v & 0xc0) | ((hstop & 0x7) << 3) | (hstart & 0x7);
ov7670_set(REG_HREF, v);
ov7670_set(REG_VSTART, (vstart >> 2) & 0xff);
ov7670_set(REG_VSTOP, (vstop >> 2) & 0xff);
v = ov7670_get(REG_VREF);
v = (v & 0xf0) | ((vstop & 0x3) << 2) | (vstart & 0x3);
ov7670_set(REG_VREF, v);
ov7670_set(REG_COM3, COM3_SCALEEN | COM3_DCWEN);
ov7670_set(REG_COM14, COM14_DCWEN | 0x01);
ov7670_set(0x73, 0xf1);
ov7670_set(0xa2, 0x52);
ov7670_set(0x7b, 0x1c);
ov7670_set(0x7c, 0x28);
ov7670_set(0x7d, 0x3c);
ov7670_set(0x7f, 0x69);
ov7670_set(REG_COM9, 0x38);
ov7670_set(0xa1, 0x0b);
ov7670_set(0x74, 0x19);
ov7670_set(0x9a, 0x80);
ov7670_set(0x43, 0x14);
ov7670_set(REG_COM13, 0xc0);
ov7670_set(0x70, 0x3A);
ov7670_set(0x71, 0x35);
ov7670_set(0x72, 0x11);
/* Gamma curve values */
ov7670_set(0x7a, 0x20);
ov7670_set(0x7b, 0x10);
ov7670_set(0x7c, 0x1e);
ov7670_set(0x7d, 0x35);
ov7670_set(0x7e, 0x5a);
ov7670_set(0x7f, 0x69);
ov7670_set(0x80, 0x76);
ov7670_set(0x81, 0x80);
ov7670_set(0x82, 0x88);
ov7670_set(0x83, 0x8f);
ov7670_set(0x84, 0x96);
ov7670_set(0x85, 0xa3);
ov7670_set(0x86, 0xaf);
ov7670_set(0x87, 0xc4);
ov7670_set(0x88, 0xd7);
ov7670_set(0x89, 0xe8);
/* AGC and AEC parameters. Note we start by disabling those features,
then turn them only after tweaking the values. */
ov7670_set(REG_COM8, COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT);
ov7670_set(REG_GAIN, 0);
ov7670_set(REG_AECH, 0);
ov7670_set(REG_COM4, 0x40); /* magic reserved bit */
ov7670_set(REG_COM9, 0x18); /* 4x gain + magic rsvd bit */
ov7670_set(REG_BD50MAX, 0x05);
ov7670_set(REG_BD60MAX, 0x07);
ov7670_set(REG_AEW, 0x95);
ov7670_set(REG_AEB, 0x33);
ov7670_set(REG_VPT, 0xe3);
ov7670_set(REG_HAECC1, 0x78);
ov7670_set(REG_HAECC2, 0x68);
ov7670_set(0xa1, 0x03); /* magic */
ov7670_set(REG_HAECC3, 0xd8);
ov7670_set(REG_HAECC4, 0xd8);
ov7670_set(REG_HAECC5, 0xf0);
ov7670_set(REG_HAECC6, 0x90);
ov7670_set(REG_HAECC7, 0x94);
ov7670_set(REG_COM8,
COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT | COM8_AGC | COM8_AEC);
/* Almost all of these are magic "reserved" values. */
ov7670_set(REG_COM5, 0x61);
ov7670_set(REG_COM6, 0x4b);
ov7670_set(0x16, 0x02);
ov7670_set(REG_MVFP, 0x07);
ov7670_set(0x21, 0x02);
ov7670_set(0x22, 0x91);
ov7670_set(0x29, 0x07);
ov7670_set(0x33, 0x0b);
ov7670_set(0x35, 0x0b);
ov7670_set(0x37, 0x1d);
ov7670_set(0x38, 0x71);
ov7670_set(0x39, 0x2a);
ov7670_set(REG_COM12, 0x78);
ov7670_set(0x4d, 0x40);
ov7670_set(0x4e, 0x20);
ov7670_set(REG_GFIX, 0);
ov7670_set(0x6b, 0x4a);
ov7670_set(0x74, 0x10);
ov7670_set(0x8d, 0x4f);
ov7670_set(0x8e, 0);
ov7670_set(0x8f, 0);
ov7670_set(0x90, 0);
ov7670_set(0x91, 0);
ov7670_set(0x96, 0);
ov7670_set(0x9a, 0);
ov7670_set(0xb0, 0x84);
ov7670_set(0xb1, 0x0c);
ov7670_set(0xb2, 0x0e);
ov7670_set(0xb3, 0x82);
ov7670_set(0xb8, 0x0a);
/* Matrix coefficients */
ov7670_set(0x4f, 0x80);
ov7670_set(0x50, 0x80);
ov7670_set(0x51, 0);
ov7670_set(0x52, 0x22);
ov7670_set(0x53, 0x5e);
ov7670_set(0x54, 0x80);
ov7670_set(0x58, 0x9e);
/* More reserved magic, some of which tweaks white balance */
ov7670_set(0x43, 0x0a);
ov7670_set(0x44, 0xf0);
ov7670_set(0x45, 0x34);
ov7670_set(0x46, 0x58);
ov7670_set(0x47, 0x28);
ov7670_set(0x48, 0x3a);
ov7670_set(0x59, 0x88);
ov7670_set(0x5a, 0x88);
ov7670_set(0x5b, 0x44);
ov7670_set(0x5c, 0x67);
ov7670_set(0x5d, 0x49);
ov7670_set(0x5e, 0x0e);
ov7670_set(0x6c, 0x0a);
ov7670_set(0x6d, 0x55);
ov7670_set(0x6e, 0x11);
ov7670_set(0x6f, 0x9f); /* "9e for advance AWB" */
ov7670_set(0x6a, 0x40);
ov7670_set(REG_BLUE, 0x40);
ov7670_set(REG_RED, 0x60);
ov7670_set(REG_COM8,
COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT | COM8_AGC | COM8_AEC
| COM8_AWB);
return 0;
}
