static int ov7670_detect(struct i2c_client *client)
{
unsigned char v;
int ret;
ret = ov7670_init(client);
if (ret < 0)
return ret;
ret = ov7670_read(client, REG_MIDH, &v);
if (ret < 0)
return ret;
if (v != 0x7f) /* OV manuf. id. */
return -ENODEV;
ret = ov7670_read(client, REG_MIDL, &v);
if (ret < 0)
return ret;
if (v != 0xa2)
return -ENODEV;
/*
* OK, we know we have an OmniVision chip...but which one?
*/
ret = ov7670_read(client, REG_PID, &v);
if (ret < 0)
return ret;
if (v != 0x76) /* PID + VER = 0x76 / 0x73 */
return -ENODEV;
ret = ov7670_read(client, REG_VER, &v);
if (ret < 0)
return ret;
if (v != 0x73) /* PID + VER = 0x76 / 0x73 */
return -ENODEV;
return 0;
}
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;
}
void setup() {
SYSTEMConfigPerformance(SYSCLK);
// Initialize hardware UART2 and establish communication at 9600 bps
UARTInit(9600);
// Init i2c
I2CInit();
// if (I2CInit((uint32_t) I2CMASTER) == 0) {
// printf("Fatal error!\n");
// while (1);
// }
ov7670_init();
// включить таймер
//T1CON = 0x8030;
//OpenTimer2( T2_ON | T2_SOURCE_INT | T2_PS_1_8, 0x0008);
//OpenTimer2( T2_ON | T2_SOURCE_INT | T2_PS_1_256, 0xFFFF);
// This statement says: turn on timer2 | have it use an internal clock source | have it
// use a prescaler of 1:256, and use a period of 0xFFFF or 2^16 cycles
// Timer2 as configured would trigger an interrupt at a frequency of (80MHZ/256/65535), or 4.77
// times a second.
//ConfigIntTimer2( T2_INT_ON | T2_INT_PRIOR_2);
// This statement configured the timer to produce an interrupt with a priority of 2
//INTEnableSystemMultiVectoredInt();
// Use multi-vectored interrupts
OpenTimer2(T2_ON | T2_PS_1_8, 0);
OpenOC4( OC_ON | OC_TIMER_MODE32 | OC_TIMER2_SRC | OC_CONTINUE_PULSE | OC_LOW_HIGH , 0, 0 );
}
