Hola amigos del foro, soy nueva y no tengo mucha idea de Arduino, estoy aprendiendo y todavía voy un poco floja en el asunto jeje.
Para clase he montado una placa de arduino uno junto con una cámara OV7670 y un adaptador de microSD para almacenar las imágenes.
He conseguido que funcione mas o menos y quiero incluir un botón de disparo, es decir, decirle al programa cuando tiene que hacer la fotografía, el problema es que casi no me quedan pines libres en la placa.
¿Alguien puede ayudarme? Muchas gracias de antemano
Pdt: Incluyo fritzing y código para que podáis verlo 
#include <Wire.h>
void XCLK_SETUP(void) {
pinMode(9, OUTPUT); //Set pin 9 to output
//Initialize timer 1
//WGM13, WGM12, WGM11 & WGM10 bits SET- Fast PWM mode
//COM1A0 SET- Toggle OC1A on compare match
TCCR1A = (1 << COM1A0) | (1 << WGM11) | (1 << WGM10);
//SET CS10 bit for clock select with no prescaling
TCCR1B = (1 << WGM13) | (1 << WGM12) | (1 << CS10);
//Output Compare Register 1A(OCR1A) = 0
//This will lead to a match on every clock cycle
//Toggle OC1A output pin on every match instance
//Therefore, the generated waveform will have half
//the frequency of the driving clock i.e. 8Mhz
//OC1A pin- PB1 (alternate functn) pin i.e. Arduino pin 9
OCR1A = 0;
}
void WriteOV7670(byte regID, byte regVal) {
// Slave 7-bit address is 0x21.
// R/W bit set automatically by Wire functions
// dont write 0x42 or 0x43 for slave address
Wire.beginTransmission(0x21);
// Reset all register values
Wire.write(regID);
Wire.write(regVal);
Wire.endTransmission();
delay(1);
}
void ReadOV7670(byte regID) {
// Reading from a register is done in two steps
// Step 1: Write register address to the slave
// from which data is to be read.
Wire.beginTransmission(0x21); // 7-bit Slave address
Wire.write(regID); // reading from register
Wire.endTransmission();
// Step 2: Read 1 byte from Slave
Wire.requestFrom(0x21, 1);
Serial.print("Read request Status:");
Serial.println(Wire.available());
Serial.print(regID, HEX);
Serial.print(":");
Serial.println(Wire.read(), HEX);
}
void Init_OV7670() {
//Reset All Register Values
WriteOV7670(0x12, 0x80);
delay(100);
WriteOV7670(0x3A, 0x04); //TSLB
WriteOV7670(0x13, 0xC0); //COM8
WriteOV7670(0x00, 0x00); //GAIN
WriteOV7670(0x10, 0x00); //AECH
WriteOV7670(0x0D, 0x40); //COM4
WriteOV7670(0x14, 0x18); //COM9
WriteOV7670(0x24, 0x95); //AEW
WriteOV7670(0x25, 0x33); //AEB
WriteOV7670(0x13, 0xC5); //COM8
WriteOV7670(0x6A, 0x40); //GGAIN
WriteOV7670(0x01, 0x40); //BLUE
WriteOV7670(0x02, 0x60); //RED
WriteOV7670(0x13, 0xC7); //COM8
WriteOV7670(0x41, 0x08); //COM16
WriteOV7670(0x15, 0x20); //COM10 - PCLK does not toggle on HBLANK
}
#include <SD.h>
int CS_Pin = 10;
void setup() {
// SD setup
Serial.begin(9600);
pinMode(CS_Pin, OUTPUT);
if (SD.begin(CS_Pin)) {
Serial.println("Card Initialization Successful!");
} else {
Serial.println("Card Initialization Failed!");
}
File dataFile = SD.open("test.bmp", FILE_WRITE);
for (int i = 0; i < 240; i++) {
for (int j = 0; j < 320; j++) {
dataFile.write(0x77);
}
}
dataFile.close();
}
void loop() {
}
void QVGA_Image(String title) {
int h, w;
File dataFile = SD.open(title, FILE_WRITE);
while (!(PIND & );//wait for high
while ((PIND & );//wait for low
h = 240;
while (h--) {
w = 320;
byte dataBuffer[320];
while (w--) {
while ((PIND & 4)); //wait for low
dataBuffer[319 - w] = (PINC & 15) | (PIND & 240);
while (!(PIND & 4)); //wait for high
while ((PIND & 4)); //wait for low
while (!(PIND & 4)); //wait for high
}
dataFile.write(dataBuffer, 320);
}
dataFile.close();
delay(100);
}
