SD Card

platformio.ini

@@ -18,3 +18,4 @@ framework = arduino
 lib_deps = 
 	arpruss/USBComposite for STM32F1@^0.99
 	olikraus/U8g2@^2.28.8
+	arduino-libraries/SD@^1.2.4

src/main.cpp

 #include <Arduino.h>
-#include <USBComposite.h>
 #include <U8g2lib.h>
+#include <USBComposite.h>
+
+#include <SD.h>
+#include <SPI.h>
+
+File root;
+File myFile;
 
 #ifdef U8X8_HAVE_HW_SPI
 #include <SPI.h>
@@ -9,34 +15,52 @@
 #include <Wire.h>
 #endif
 
-U8G2_SSD1306_128X64_NONAME_F_HW_I2C oled(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
-
-USBMultiSerial<1> VirtSerial;
-
+U8G2_SSD1306_128X64_NONAME_F_HW_I2C oled(U8G2_R0, /* reset=*/U8X8_PIN_NONE);
+USBSerial VirtSerial;
 
 void setup(void) {
-  VirtSerial.begin();  
-
-  VirtSerial.ports[0].println("Moin");
-
+    // VirtSerial.begin(9600);
+    // while (!USBComposite);
 
+    oled.begin();
+    oled.setFont(u8g2_font_bubble_tr);
+    oled.firstPage();
+    do {
+        oled.setCursor(0, 25);
+        oled.print("Crypt");
+        oled.setCursor(30, 55);
+        oled.print("Stick");
+    } while (oled.nextPage());
+    delay(3000);
+    oled.setFont(u8g2_font_7x14_mf);
+    oled.clear();
 
+    if (!SD.begin(PA4)) {
+        oled.firstPage();
+        do {
+            oled.setCursor(0, 25);
+            oled.print("SD card init failed");
+        } while (oled.nextPage());
+        while (1)
+            ;
+    }
+    
+    do {
+        oled.setCursor(0, 25);
+        oled.print("SD card init done");
+    } while (oled.nextPage());
 
-  
-  oled.begin();
-  oled.setFont(u8g2_font_bubble_tr);
-  oled.firstPage();
-  do {
-    oled.setCursor(0, 25);
-    oled.print("Crypt");
-    oled.setCursor(30, 55);
-    oled.print("Stick");
-  } while ( oled.nextPage() );
-  delay(1000);
-
-}
+    root = SD.open("/");
+    myFile = SD.open("test.txt", FILE_READ);
 
-void loop(void) {
+    if (myFile) {
+        while (myFile.available()) {
+            VirtSerial.print((char)myFile.read());
+        }
+    } else {
+        VirtSerial.println("error opening test.txt");
+    }
 
 }
 
+void loop(void) {}
\ No newline at end of file