Revision 9:dbeef6223e7a, committed 2017-07-07

Comitter:

zhangyx

Date:

Fri Jul 07 15:27:16 2017 +0000

Parent:

8:308d188a2d3a

Child:

10:b5b2b8035bbf

Commit message:

LCD2004 demo

Changed in this revision

--- a/TextLCD.cpp	Thu Jan 02 21:07:01 2014 +0000
+++ b/TextLCD.cpp	Fri Jul 07 15:27:16 2017 +0000
@@ -25,7 +25,7 @@
 
 TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5,
                  PinName d6, PinName d7, LCDType type) : _rs(rs),
-        _e(e), _d(d4, d5, d6, d7),
+        _e(e,1), _d(d4, d5, d6, d7),
         _type(type) {
 
     _e  = 1;
@@ -39,12 +39,13 @@
         wait(0.00164);  // this command takes 1.64ms, so wait for it
     }
     writeByte(0x2);     // 4-bit mode
-    wait(0.000040f);    // most instructions take 40us
+    wait(0.00164);    // 1.64ms
 
     writeCommand(0x28); // Function set 001 BW N F - -
     writeCommand(0x0C);
     writeCommand(0x6);  // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
     cls();
+
 }
 
 void TextLCD::character(int column, int row, int c) {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jul 07 15:27:16 2017 +0000
@@ -0,0 +1,31 @@
+#include "mbed.h"
+#include "TextLCD.h"
+int main() {
+    TextLCD lcd(A5, A4, A3, A2, A1, A0, TextLCD::LCD20x4); // rs, e, d4-d7, model
+    
+    lcd.printf("Hello World!");
+    wait_ms(1000); //等待1秒
+    lcd.cls(); //清屏
+    
+    for(int i=0; i<10000; i+=4){
+        lcd.locate(0,0); //分别控制起始的列和行，从0开始
+        lcd.printf("%d", i);
+        wait_ms(1000); //等待1秒
+        
+        lcd.locate(0,1);
+        lcd.printf("%d", i+1);
+        wait_ms(1000);
+        
+        lcd.locate(0,2);
+        lcd.printf("%d", i+2);
+        wait_ms(1000);
+        
+        lcd.locate(0,3);
+        lcd.printf("%d", i+3);
+        wait_ms(1000);
+        
+        lcd.cls(); //清屏
+    }
+
+    while(1);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Jul 07 15:27:16 2017 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/mbed_official/code/mbed/builds/64910690c574
\ No newline at end of file