Diff: main.cpp

Revision:

0:a55017238349

Child:

1:fa206fcadfad

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Mar 30 14:35:55 2015 +0000
@@ -0,0 +1,44 @@
+/* Testing the overflow of Timer
+LCD on I2C bus, PCF8574
+ */
+#include "mbed.h"
+#include "TextLCD.h"
+
+Timer t;
+
+I2C i2c_lcd(I2C_SDA,I2C_SCL); // SDA, SCL
+
+TextLCD_I2C lcd(&i2c_lcd, 0x40, TextLCD::LCD16x2); // I2C bus, PCF8574 Slaveaddress, LCD Type
+
+int main()
+{
+    uint32_t    Millis, LastMillis;
+
+    i2c_lcd.frequency(400000);  // 400KHz
+    lcd.setCursor(lcd.CurOff_BlkOff); // Cursor off, Blink off
+    lcd.cls();
+    lcd.setBacklight(TextLCD::LightOn);
+    lcd.locate(0,0);  // Goto beginning of line = second par.
+    lcd.printf("Testing Timer...\n");
+    lcd.locate(0,1);  // Goto beginning of line = second par.
+    lcd.printf("...us overflow  \n");
+
+    t.reset();
+    t.start();
+    Millis = t.read_ms() & 0x2000;
+    lcd.locate(0,1);  // Goto beginning of line = second par.
+    lcd.printf("Start M: %08d",Millis);
+
+    do {
+        LastMillis = Millis;
+        Millis = t.read_ms() & 0x2000;
+    } while(LastMillis <= Millis);
+
+    lcd.locate(0,0);  // Goto beginning of line = second par.
+    lcd.printf("Last M: %08d",LastMillis);
+    lcd.locate(0,1);
+    lcd.printf("Act. M: %08d",Millis);
+
+    printf("Last Millis: %06d",LastMillis);
+    printf("Act. Millis: %06d",Millis);
+}