Hola:
Tienes razón. Es que todavía no controlo mucho este foro.... :~
Aquí teneis el código que estoy intentado usar:
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>
#include <SD.h>
#include <Wire.h>
#define SD_CS 4 // Chip select line for SD card
#define TFT_CS 10 // Chip select line for TFT display
#define TFT_DC 9 // Data/command line for TFT
#define TFT_RST 8 // Reset line for TFT (or connect to +5V)
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
#define DS1307_I2C_ADDRESS 0x68
// Convierte números normales decimales a BCD (binario decimal codificado)
byte decToBcd(byte val)
{
return ( (val/10*16) + (val%10) );
}
// Convierte BCD (binario decimal codificado) a números normales decimales
byte bcdToDec(byte val)
{
return ( (val/16*10) + (val%16) );
}
// 1) Sets the date and time on the ds1307
// 2) Starts the clock
// 3) Sets hour mode to 24 hour clock
void setDateDs1307(byte second, // 0-59
byte minute, // 0-59
byte hour, // 1-23
byte dayOfWeek, // 1-7
byte dayOfMonth, // 1-28/29/30/31
byte month, // 1-12
byte year) // 0-99
{
Wire.beginTransmission(DS1307_I2C_ADDRESS);
Wire.write((uint8_t) 0);
Wire.write(decToBcd(second));
Wire.write(decToBcd(minute));
Wire.write(decToBcd(hour));
Wire.write(decToBcd(dayOfWeek));
Wire.write(decToBcd(dayOfMonth));
Wire.write(decToBcd(month));
Wire.write(decToBcd(year));
Wire.endTransmission();
}
// Establece la fecha y la hora del reloj
void getDateDs1307(byte *second,
byte *minute,
byte *hour,
byte *dayOfWeek,
byte *dayOfMonth,
byte *month,
byte *year)
{
// Resetea el registro puntero
Wire.beginTransmission(DS1307_I2C_ADDRESS);
Wire.write((uint8_t) 0);
Wire.endTransmission();
Wire.requestFrom(DS1307_I2C_ADDRESS, 7);
// Alguno de estos necesitan enmascarar porque ciertos bits son bits de control
*second = bcdToDec(Wire.read() & 0x7f);
*minute = bcdToDec(Wire.read());
*hour = bcdToDec(Wire.read() & 0x3f);
*dayOfWeek = bcdToDec(Wire.read());
*dayOfMonth = bcdToDec(Wire.read());
*month = bcdToDec(Wire.read());
*year = bcdToDec(Wire.read());
}
void setup(void) {
Serial.begin(9600);
byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
Wire.begin();
Serial.begin(9600);
tft.initR(INITR_REDTAB); // enciende la pantalla
tft.setTextWrap(false);
tft.fillScreen(ST7735_BLACK);
tft.setCursor(20, 30);
tft.setTextColor(ST7735_RED);
tft.setTextSize(1);
tft.println("Hello World!");
delay (2000);
bmpDraw("parrot.bmp", 0, 0);
Serial.print("Initializing SD card...");
if (!SD.begin(SD_CS)) {
Serial.println("failed!");
return;
}
Serial.println("OK!");
delay (2000);
}
void loop() {
byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
getDateDs1307(&second, &minute, &hour, &dayOfWeek, &dayOfMonth, &month, &year);
tft.fillScreen(ST7735_BLACK);
tft.setTextWrap(true);
tft.setTextSize(2);
tft.setCursor(20, 30);
tft.setTextColor(ST7735_WHITE);
if (hour < 10) Serial.print("0");
tft.print(hour, DEC);
tft.print(":");
if (minute < 10) Serial.print("0");
tft.print(minute, DEC);
tft.setTextSize(1);
tft.setCursor(10, 60);
tft.setTextColor(ST7735_RED);
tft.setTextColor(ST7735_BLUE);
if (dayOfMonth < 10) Serial.print("0");
tft.print(dayOfMonth, DEC);
tft.print("/");
if (month < 10) Serial.print("0");
tft.print(month, DEC);
tft.print("/");
tft.print("20");
if (year < 10) Serial.print("0");
tft.print(year, DEC);
tft.setTextColor(ST7735_YELLOW);
switch (dayOfWeek)
{
case 1:
tft.println(" Lunes");
break;
case 2:
tft.println(" Martes");
break;
case 3:
tft.println(" Miercoles");
break;
case 4:
tft.println(" Jueves");
break;
case 5:
tft.println(" Viernes");
break;
case 6:
tft.println(" Sabado");
break;
case 7:
tft.println(" Domingo");
break;
}
delay(5000); //Pausa durante 1 segundo
bmpDraw("parrot.bmp", 0, 0);
delay (2000);
}
// This function opens a Windows Bitmap (BMP)
#define BUFFPIXEL 20
void bmpDraw(char *filename, uint8_t x, uint8_t y) {
File bmpFile;
int bmpWidth, bmpHeight; // W+H in pixels
uint8_t bmpDepth; // Bit depth (currently must be 24)
uint32_t bmpImageoffset; // Start of image data in file
uint32_t rowSize; // Not always = bmpWidth; may have padding
uint8_t sdbuffer[3*BUFFPIXEL]; // pixel buffer (R+G+B per pixel)
uint8_t buffidx = sizeof(sdbuffer); // Current position in sdbuffer
boolean goodBmp = false; // Set to true on valid header parse
boolean flip = true; // BMP is stored bottom-to-top
int w, h, row, col;
uint8_t r, g, b;
uint32_t pos = 0, startTime = millis();
if((x >= tft.width()) || (y >= tft.height())) return;
Serial.println();
Serial.print("Loading image '");
Serial.print(filename);
Serial.println('\'');
// Open requested file on SD card
if ((bmpFile = SD.open(filename)) == NULL) {
Serial.print("File not found");
return;
}
// Parse BMP header
if(read16(bmpFile) == 0x4D42) { // BMP signature
Serial.print("File size: "); Serial.println(read32(bmpFile));
(void)read32(bmpFile); // Read & ignore creator bytes
bmpImageoffset = read32(bmpFile); // Start of image data
Serial.print("Image Offset: "); Serial.println(bmpImageoffset, DEC);
// Read DIB header
Serial.print("Header size: "); Serial.println(read32(bmpFile));
bmpWidth = read32(bmpFile);
bmpHeight = read32(bmpFile);
if(read16(bmpFile) == 1) { // # planes -- must be '1'
bmpDepth = read16(bmpFile); // bits per pixel
Serial.print("Bit Depth: "); Serial.println(bmpDepth);
if((bmpDepth == 24) && (read32(bmpFile) == 0)) { // 0 = uncompressed
goodBmp = true; // Supported BMP format -- proceed!
Serial.print("Image size: ");
Serial.print(bmpWidth);
Serial.print('x');
Serial.println(bmpHeight);
rowSize = (bmpWidth * 3 + 3) & ~3;
if(bmpHeight < 0) {
bmpHeight = -bmpHeight;
flip = false;
}
// Crop area to be loaded
w = bmpWidth;
h = bmpHeight;
if((x+w-1) >= tft.width()) w = tft.width() - x;
if((y+h-1) >= tft.height()) h = tft.height() - y;
// Set TFT address window to clipped image bounds
tft.setAddrWindow(x, y, x+w-1, y+h-1);
for (row=0; row<h; row++) { // For each scanline...
if(flip) // Bitmap is stored bottom-to-top order (normal BMP)
pos = bmpImageoffset + (bmpHeight - 1 - row) * rowSize;
else // Bitmap is stored top-to-bottom
pos = bmpImageoffset + row * rowSize;
if(bmpFile.position() != pos) { // Need seek?
bmpFile.seek(pos);
buffidx = sizeof(sdbuffer); // Force buffer reload
}
for (col=0; col<w; col++) { // For each pixel...
// Time to read more pixel data?
if (buffidx >= sizeof(sdbuffer)) { // Indeed
bmpFile.read(sdbuffer, sizeof(sdbuffer));
buffidx = 0; // Set index to beginning
}
// Convert pixel from BMP to TFT format, push to display
b = sdbuffer[buffidx++];
g = sdbuffer[buffidx++];
r = sdbuffer[buffidx++];
tft.pushColor(tft.Color565(r,g,b));
} // end pixel
} // end scanline
Serial.print("Loaded in ");
Serial.print(millis() - startTime);
Serial.println(" ms");
} // end goodBmp
}
}
bmpFile.close();
if(!goodBmp) Serial.println("BMP format not recognized.");
}
uint16_t read16(File f) {
uint16_t result;
((uint8_t *)&result)[0] = f.read(); // LSB
((uint8_t *)&result)[1] = f.read(); // MSB
return result;
}
uint32_t read32(File f) {
uint32_t result;
((uint8_t *)&result)[0] = f.read(); // LSB
((uint8_t *)&result)[1] = f.read();
((uint8_t *)&result)[2] = f.read();
((uint8_t *)&result)[3] = f.read(); // MSB
return result;
}