Revision 1:3561ca8c9754, committed 2018-04-06

Comitter:

inggrig

Date:

Fri Apr 06 09:33:48 2018 +0000

Parent:

0:6beb6f498640

Commit message:

Library for I2C Lcd 16x2 with china 1? I2C module

Changed in this revision

diff -r 6beb6f498640 -r 3561ca8c9754 TextLCD.cpp
--- a/TextLCD.cpp	Mon Aug 09 14:17:02 2010 +0000
+++ b/TextLCD.cpp	Fri Apr 06 09:33:48 2018 +0000
@@ -54,19 +54,22 @@
 TextLCD::TextLCD(PinName sda, PinName scl, int i2cAddress, LCDType type) : _i2c(sda, scl),
         _type(type) {
     _i2cAddress = i2cAddress;
-    wait(0.015);        // Wait 15ms to ensure powered up
+    wait(0.020);        // Wait 15ms to ensure powered up
 
     // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
     for (int i=0; i<3; i++) {
-        writeByte(0x3, false);
-        wait(0.00164);  // this command takes 1.64ms, so wait for it
+        writeByte(0x03, false);
+        wait(0.005);  // this command takes 1.64ms, so wait for it
     }
     writeByte(0x2, false);     // 4-bit mode
-    wait(0.000040f);    // most instructions take 40us
+    wait(0.000080f);    // most instructions take 40us
 
     writeCommand(0x28); // Function set 001 BW N F - -
+    wait(0.000080f);
     writeCommand(0x0C);
+    wait(0.000080f);
     writeCommand(0x6);  // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
+    wait(0.000080f);
     cls();
 }
 
@@ -120,15 +123,17 @@
 }
 
 void TextLCD::writeNibble(int data, bool rs) {
+    data=data<<4;
+    data=data | 0x08; //backlight on
     if (rs) {
         data = data | RS_ON; // set rs bit
     }
     data |= E_ON; // E on
     writeI2CByte(data);
     data ^= E_ON; // E off
-    wait_us(1);
+    wait_us(100);
     writeI2CByte(data);
-    wait_us(1000);
+    wait_us(100);
 }
 
 void TextLCD::writeByte(int data, bool rs) {

diff -r 6beb6f498640 -r 3561ca8c9754 TextLCD.h
--- a/TextLCD.h	Mon Aug 09 14:17:02 2010 +0000
+++ b/TextLCD.h	Fri Apr 06 09:33:48 2018 +0000
@@ -25,8 +25,8 @@
 
 #include "mbed.h"
 
-#define E_ON 0x10
-#define RS_ON 0x80
+#define E_ON 0x04
+#define RS_ON 0x01
 
 /** A TextLCD interface for driving 4-bit HD44780-based LCDs
  *

diff -r 6beb6f498640 -r 3561ca8c9754 main.cpp
--- a/main.cpp	Mon Aug 09 14:17:02 2010 +0000
+++ b/main.cpp	Fri Apr 06 09:33:48 2018 +0000
@@ -1,8 +1,15 @@
 #include "mbed.h"
 #include "TextLCD.h"
 
-TextLCD lcd(p9, p10);
-
+TextLCD lcd(PB_9, PB_8,0x4E);
+int k=0;
 int main() {
+    wait(1);
     lcd.printf("Hi mbed World!\n");
+    while(1)
+    {
+        wait(1);
+        lcd.printf("Hi mbed World %d!\n",k);
+        k++;
+    }
 }

diff -r 6beb6f498640 -r 3561ca8c9754 mbed.bld
--- a/mbed.bld	Mon Aug 09 14:17:02 2010 +0000
+++ b/mbed.bld	Fri Apr 06 09:33:48 2018 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/9114680c05da
+https://os.mbed.com/users/mbed_official/code/mbed/builds/994bdf8177cb
\ No newline at end of file