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97 lines
2.2 KiB
97 lines
2.2 KiB
7 years ago
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/*
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Read/Write File Example
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*/
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#include <Wire.h>
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#include <SPI.h>
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#include <digitalWriteFast.h>
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#include <GraphicsLib.h>
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#include <MI0283QT2.h>
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#include <MI0283QT9.h>
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#include <DisplaySPI.h>
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#include <DisplayI2C.h>
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#include <SD.h>
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//Declare only one display !
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// MI0283QT2 lcd; //MI0283QT2 Adapter v1
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// MI0283QT9 lcd; //MI0283QT9 Adapter v1
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// DisplaySPI lcd; //SPI (GLCD-Shield or MI0283QT Adapter v2)
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DisplayI2C lcd; //I2C (GLCD-Shield or MI0283QT Adapter v2)
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File myFile;
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void setup()
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{
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int x;
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//init Serial port
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Serial.begin(9600);
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while(!Serial); //wait for serial port to connect - needed for Leonardo only
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//init LCD
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Serial.println("Init Display...");
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lcd.begin();
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//lcd.begin(SPI_CLOCK_DIV4, 8); //SPI Displays: spi-clk=Fcpu/4, rst-pin=8
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//lcd.begin(0x20, 8); //I2C Displays: addr=0x20, rst-pin=8
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lcd.fillScreen(RGB(255,255,255));
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//init SD-Card
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Serial.println("Init SD-Card...");
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x = lcd.drawText(5, 5, "Init SD-Card...", RGB(0,0,0), RGB(255,255,255), 1);
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if(!SD.begin(4)) //cs-pin=4
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{
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Serial.println("failed");
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lcd.drawText(x, 5, "failed", RGB(0,0,0), RGB(255,255,255), 1);
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while(1);
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}
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//open file for writing
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Serial.println("Open File...");
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x = lcd.drawText(5, 5, "Open File...", RGB(0,0,0), RGB(255,255,255), 1);
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myFile = SD.open("test.txt", FILE_WRITE);
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if(myFile)
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{
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Serial.println("Writing...");
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lcd.drawText(5, 5, "Writing...", RGB(0,0,0), RGB(255,255,255), 1);
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myFile.println("This is a Test: ABC 123");
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myFile.close();
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}
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else
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{
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Serial.println("error");
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lcd.drawText(x, 5, "error", RGB(0,0,0), RGB(255,255,255), 1);
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}
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//open file for reading
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Serial.println("Open File...");
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x = lcd.drawText(5, 5, "Open File...", RGB(0,0,0), RGB(255,255,255), 1);
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myFile = SD.open("test.txt");
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if(myFile)
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{
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Serial.println("Reading...");
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lcd.drawText(x, 5, "Reading...", RGB(0,0,0), RGB(255,255,255), 1);
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lcd.setCursor(0, 20);
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while(myFile.available())
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{
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uint8_t c;
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c = myFile.read();
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Serial.write(c);
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lcd.print((char)c);
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}
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myFile.close();
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}
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else
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{
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Serial.println("error");
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lcd.drawText(x, 5, "error", RGB(0,0,0), RGB(255,255,255), 1);
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}
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}
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void loop()
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{
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//do nothing
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}
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