Help needed please.
I have a 1.8" TFT with integraded SD card attached to an Arduino UNO. This also has an RF receiver.
On a second Arduino UNO, I have an RF transmitter and four buttons. When I press each of the buttons in turn, the relative messages are received on the first UNO and a corresponding message is displayed on the TFT. All works well until I added code in an attempt to load a corresponding graphics file from the integrated SD card reader.
When I load the sketch, I get "Initializing SD card...OK!", but the messages don't display nor do the graphics. I have pasted the sketch below. Any help will be very much appreciated.
Thanks
#define mosi 11
#define cs 10
#define dc 9
#define rst 8
#include <VirtualWire.h>
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>
#include <SD.h>
#include <VirtualWire.h>
Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, rst);
#define SD_CS 4// Chip select line for SD card
void setup(void) {
tft.initR(INITR_BLACKTAB);
Serial.begin(9600);
Serial.print("Initializing SD card...");
if (!SD.begin(SD_CS)) {
Serial.println("failed!");
return;
}
Serial.println("OK!");
}
void loop() {
tft.fillScreen(ST7735_BLACK);
tft.setTextSize(2);
tft.setCursor(5, 20);
tft.setTextWrap(false);
uint8_t buf[VW_MAX_MESSAGE_LEN];
uint8_t buflen = VW_MAX_MESSAGE_LEN;
if (vw_get_message(buf, &buflen)) // Non-blocking
{
int i;
char msg;
for (i = 0; i < buflen; i++)
{
char nChar=buf[i];
if(nChar == 49){
Serial.print ("Message 1");
Serial.println (" ");
tft.fillScreen(ST7735_BLUE);
tft.setTextColor(ST7735_WHITE);
tft.print ("Message 1");
bmpDraw("message1.bmp", 0, 0);
}
delay (1000);
if(nChar == 50){
Serial.print ("Message 2");
Serial.println (" ");
tft.fillScreen(ST7735_WHITE);
tft.setTextColor(ST7735_BLACK);
tft.print ("Message 2");
bmpDraw("message2.bmp", 0, 0);
}
delay (1000);
if(nChar == 51){
Serial.print ("Message 3");
Serial.println (" ");
tft.fillScreen(ST7735_YELLOW);
tft.setTextColor(ST7735_BLUE);
tft.print ("Message 3");
bmpDraw("message3.bmp", 0, 0);
}
delay (1000);
if(nChar == 52){
Serial.print ("Message 4");
Serial.println (" ");
tft.fillScreen(ST7735_WHITE);
tft.setTextColor(ST7735_RED);
tft.print ("Message 2");
bmpDraw("message2.bmp", 0, 0);
}
delay (1000);
}
}
}
#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);
// BMP rows are padded (if needed) to 4-byte boundary
rowSize = (bmpWidth * 3 + 3) & ~3;
// If bmpHeight is negative, image is in top-down order.
// This is not canon but has been observed in the wild.
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...
// Seek to start of scan line. .
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;
}