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; }