Fixed SD example
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sumotoy
parent
1d7ce616fb
commit
682590386c
1 changed files with 92 additions and 85 deletions
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@ -15,10 +15,22 @@ An SD bmp image load example. (extracted and modded by Adafruit old library http
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#include <Adafruit_GFX.h>
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#include <TFT_ILI9163C.h>
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//PINS
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#define __CS 10
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#define __DC 9
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#define __SDCS 2
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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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boolean SDInited = true;
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TFT_ILI9163C tft = TFT_ILI9163C(__CS, __DC);
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SdFat SD;
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SdFile myFile;
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@ -35,6 +47,7 @@ void setup(void) {
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if (!SD.begin(__SDCS,SPI_HALF_SPEED)) {
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tft.setCursor(0,0);
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tft.print("sd failed!");
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SDInited = false;
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}
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Serial.println("OK!");
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//your image here!
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@ -44,98 +57,92 @@ void setup(void) {
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void loop() {
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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, uint8_t x, uint16_t y) {
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void bmpDraw(const char *filename, uint8_t x, uint16_t y) {
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if (SDInited){
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File bmpFile;
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uint16_t 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 sdbufferLen = BUFFPIXEL * 3;
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uint8_t sdbuffer[sdbufferLen]; // pixel buffer (R+G+B per pixel)
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uint8_t buffidx = sdbufferLen; // 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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uint16_t w, h, row, col;
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uint8_t r, g, b;
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uint32_t pos = 0;
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File bmpFile;
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uint16_t 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 sdbufferLen = BUFFPIXEL * 3;
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uint8_t sdbuffer[sdbufferLen]; // pixel buffer (R+G+B per pixel)
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uint8_t buffidx = sdbufferLen; // 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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uint16_t w, h, row, col;
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uint8_t r, g, b;
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uint32_t pos = 0;
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if((x >= tft.width()) || (y >= tft.height())) return;
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if((x >= tft.width()) || (y >= tft.height())) return;
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// Open requested file on SD card
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if ((bmpFile = SD.open(filename)) == NULL) {
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tft.setCursor(0,0);
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tft.print("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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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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// Read DIB header
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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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if((bmpDepth == 24) && (read32(bmpFile) == 0)) { // 0 = uncompressed
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goodBmp = true; // Supported BMP format -- proceed!
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rowSize = (bmpWidth * 3 + 3) & ~3;// BMP rows are padded (if needed) to 4-byte boundary
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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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tft.startPushData(x, y, x+w-1, y+h-1);
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for (row=0; row<h; row++) { // For each scanline...
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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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}
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else { // Bitmap is stored top-to-bottom
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pos = bmpImageoffset + row * rowSize;
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}
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if (bmpFile.position() != pos) { // Need seek?
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bmpFile.seek(pos);
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buffidx = sdbufferLen; // Force buffer reload
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}
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for (col=0; col<w; col++) { // For each pixel...
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// Time to read more pixel data?
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if (buffidx >= sdbufferLen) { // Indeed
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bmpFile.read(sdbuffer, sdbufferLen);
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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, push to display
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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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tft.pushData(tft.Color565(r,g,b));
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} // end pixel
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} // end scanline
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tft.endPushData();
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} // end goodBmp
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// Open requested file on SD card
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if ((bmpFile = SD.open(filename)) == NULL) {
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tft.setCursor(0,0);
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tft.print("file not found!");
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return;
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}
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}
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bmpFile.close();
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if(!goodBmp) {
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tft.setCursor(0,0);
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tft.print("file unrecognized!");
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// Parse BMP header
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if(read16(bmpFile) == 0x4D42) { // BMP signature
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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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// Read DIB header
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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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if((bmpDepth == 24) && (read32(bmpFile) == 0)) { // 0 = uncompressed
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goodBmp = true; // Supported BMP format -- proceed!
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rowSize = (bmpWidth * 3 + 3) & ~3;// BMP rows are padded (if needed) to 4-byte boundary
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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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tft.startPushData(x, y, x+w-1, y+h-1);
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for (row=0; row<h; row++) { // For each scanline...
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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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}
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else { // Bitmap is stored top-to-bottom
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pos = bmpImageoffset + row * rowSize;
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}
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if (bmpFile.position() != pos) { // Need seek?
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bmpFile.seek(pos);
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buffidx = sdbufferLen; // Force buffer reload
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}
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for (col=0; col<w; col++) { // For each pixel...
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// Time to read more pixel data?
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if (buffidx >= sdbufferLen) { // Indeed
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bmpFile.read(sdbuffer, sdbufferLen);
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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, push to display
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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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tft.pushData(tft.Color565(r,g,b));
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} // end pixel
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} // end scanline
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tft.endPushData();
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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) {
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tft.setCursor(0,0);
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tft.print("file unrecognized!");
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}
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}
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}
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