driverblock
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08681bb197
commit
85770d547d
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#include <Adafruit_GFX.h> // Core graphics library
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#include <SPI.h>
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#include <Wire.h>
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#include <SD.h>
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#include "Adafruit_RA8875.h"
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#include <Adafruit_STMPE610.h>
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#define sd_cs 6 // uding ethernet shield sd
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// Library only supports hardware SPI at this time
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// Connect SCLK to UNO Digital #13 (Hardware SPI clock)
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// Connect MISO to UNO Digital #12 (Hardware SPI MISO)
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// Connect MOSI to UNO Digital #11 (Hardware SPI MOSI)
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#define RA8875_INT 3
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#define RA8875_CS 10
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#define RA8875_RESET 9
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Adafruit_RA8875 tft = Adafruit_RA8875(RA8875_CS, RA8875_RESET);
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void setup () {
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Serial.begin(9600);
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if (!SD.begin(sd_cs))
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{
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Serial.println("initialization failed!");
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return;
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}
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Serial.println("initialization done.");
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Serial.println("RA8875 start");
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/* Initialise the display using 'RA8875_480x272' or 'RA8875_800x480' */
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if (!tft.begin(RA8875_800x480)) {
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Serial.println("RA8875 Not Found!");
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while (1);
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}
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Serial.println("Found RA8875");
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tft.displayOn(true);
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tft.GPIOX(true); // Enable TFT - display enable tied to GPIOX
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tft.PWM1config(true, RA8875_PWM_CLK_DIV1024); // PWM output for backlight
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tft.PWM1out(255);
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Serial.print("(");
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Serial.print(tft.width());
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Serial.print(", ");
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Serial.print(tft.height());
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Serial.println(")");
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tft.graphicsMode(); // go back to graphics mode
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tft.fillScreen(RA8875_BLACK);
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tft.graphicsMode();
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bmpDraw("parrot.bmp", 0, 0);
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}
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void loop()
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{
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}
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// This function opens a Windows Bitmap (BMP) file and
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// displays it at the given coordinates. It's sped up
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// by reading many pixels worth of data at a time
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// (rather than pixel by pixel). Increasing the buffer
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// size takes more of the Arduino's precious RAM but
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// makes loading a little faster. 20 pixels seems a
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// good balance.
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#define BUFFPIXEL 20
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void bmpDraw(char *filename, int x, int y) {
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File bmpFile;
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int bmpWidth, bmpHeight; // W+H in pixels
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uint8_t bmpDepth; // Bit depth (currently must be 24)
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uint32_t bmpImageoffset; // Start of image data in file
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uint32_t rowSize; // Not always = bmpWidth; may have padding
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uint8_t sdbuffer[3*BUFFPIXEL]; // pixel in buffer (R+G+B per pixel)
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uint16_t lcdbuffer[BUFFPIXEL]; // pixel out buffer (16-bit per pixel)
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uint8_t buffidx = sizeof(sdbuffer); // Current position in sdbuffer
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boolean goodBmp = false; // Set to true on valid header parse
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boolean flip = true; // BMP is stored bottom-to-top
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int w, h, row, col;
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uint8_t r, g, b;
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uint32_t pos = 0, startTime = millis();
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uint8_t lcdidx = 0;
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boolean first = true;
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if((x >= tft.width()) || (y >= tft.height())) return;
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Serial.println();
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Serial.print(F("Loading image '"));
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Serial.print(filename);
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Serial.println('\'');
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// Open requested file on SD card
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if ((bmpFile = SD.open(filename)) == NULL) {
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Serial.println(F("File not found"));
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return;
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}
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// Parse BMP header
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if(read16(bmpFile) == 0x4D42) { // BMP signature
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Serial.println(F("File size: "));
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Serial.println(read32(bmpFile));
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(void)read32(bmpFile); // Read & ignore creator bytes
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bmpImageoffset = read32(bmpFile); // Start of image data
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Serial.print(F("Image Offset: "));
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Serial.println(bmpImageoffset, DEC);
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// Read DIB header
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Serial.print(F("Header size: "));
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Serial.println(read32(bmpFile));
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bmpWidth = read32(bmpFile);
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bmpHeight = read32(bmpFile);
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if(read16(bmpFile) == 1) { // # planes -- must be '1'
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bmpDepth = read16(bmpFile); // bits per pixel
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Serial.print(F("Bit Depth: "));
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Serial.println(bmpDepth);
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if((bmpDepth == 24) && (read32(bmpFile) == 0)) { // 0 = uncompressed
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goodBmp = true; // Supported BMP format -- proceed!
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Serial.print(F("Image size: "));
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Serial.print(bmpWidth);
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Serial.print('x');
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Serial.println(bmpHeight);
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// BMP rows are padded (if needed) to 4-byte boundary
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rowSize = (bmpWidth * 3 + 3) & ~3;
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// If bmpHeight is negative, image is in top-down order.
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// This is not canon but has been observed in the wild.
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if(bmpHeight < 0) {
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bmpHeight = -bmpHeight;
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flip = false;
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}
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// Crop area to be loaded
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w = bmpWidth;
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h = bmpHeight;
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if((x+w-1) >= tft.width()) w = tft.width() - x;
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if((y+h-1) >= tft.height()) h = tft.height() - y;
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// Set TFT address window to clipped image bounds
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for (row=0; row<h; row++) { // For each scanline...
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// Seek to start of scan line. It might seem labor-
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// intensive to be doing this on every line, but this
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// method covers a lot of gritty details like cropping
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// and scanline padding. Also, the seek only takes
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// place if the file position actually needs to change
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// (avoids a lot of cluster math in SD library).
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if(flip) // Bitmap is stored bottom-to-top order (normal BMP)
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pos = bmpImageoffset + (bmpHeight - 1 - row) * rowSize;
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else // Bitmap is stored top-to-bottom
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pos = bmpImageoffset + row * rowSize;
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if(bmpFile.position() != pos) { // Need seek?
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bmpFile.seek(pos);
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buffidx = sizeof(sdbuffer); // Force buffer reload
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}
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for (col=0; col<w; col++) { // For each column...
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// Time to read more pixel data?
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if (buffidx >= sizeof(sdbuffer)) { // Indeed
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// Push LCD buffer to the display first
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if(lcdidx > 0) {
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tft.drawPixel(col, row, lcdbuffer[lcdidx]);
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lcdidx = 0;
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first = false;
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}
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bmpFile.read(sdbuffer, sizeof(sdbuffer));
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buffidx = 0; // Set index to beginning
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}
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// Convert pixel from BMP to TFT format
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b = sdbuffer[buffidx++];
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g = sdbuffer[buffidx++];
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r = sdbuffer[buffidx++];
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lcdbuffer[lcdidx] = color565(r,g,b);
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tft.drawPixel(col, row, lcdbuffer[lcdidx]);
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} // end pixel
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} // end scanline
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// Write any remaining data to LCD
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if(lcdidx > 0) {
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tft.drawPixel(col, row, lcdbuffer[lcdidx]);
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}
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Serial.print(F("Loaded in "));
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Serial.print(millis() - startTime);
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Serial.println(" ms");
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} // end goodBmp
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}
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}
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bmpFile.close();
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if(!goodBmp) Serial.println(F("BMP format not recognized."));
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}
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// These read 16- and 32-bit types from the SD card file.
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// BMP data is stored little-endian, Arduino is little-endian too.
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// May need to reverse subscript order if porting elsewhere.
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uint16_t read16(File f) {
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uint16_t result;
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((uint8_t *)&result)[0] = f.read(); // LSB
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((uint8_t *)&result)[1] = f.read(); // MSB
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return result;
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}
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uint32_t read32(File f) {
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uint32_t result;
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((uint8_t *)&result)[0] = f.read(); // LSB
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((uint8_t *)&result)[1] = f.read();
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((uint8_t *)&result)[2] = f.read();
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((uint8_t *)&result)[3] = f.read(); // MSB
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return result;
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}
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uint16_t color565(uint8_t r, uint8_t g, uint8_t b) {
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return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
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}
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byte decToBcd(byte val){
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// Convert normal decimal numbers to binary coded decimal
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return ( (val/10*16) + (val%10) );
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}
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