Diff: CharLcd4bit.cpp

Revision:

0:0e84781e64cf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CharLcd4bit.cpp	Fri Oct 06 05:01:05 2017 +0000
@@ -0,0 +1,127 @@
+#include "CharLcd4bit.h"
+
+#define WAIT_E()            wait_ms(1)
+#define CHAR_MAX_PER_LINE   16
+#define LINE_MAX            2
+
+/* コンストラクタ */
+CharLcd4bit::CharLcd4bit(
+    PinName rs,
+    PinName rw,
+    PinName e,
+    PinName db4,
+    PinName db5,
+    PinName db6,
+    PinName db7) :
+    RS(rs),
+    RW(rw),
+    E(e),
+    DB4(db4),
+    DB5(db5),
+    DB6(db6),
+    DB7(db7)
+{
+    
+}
+
+/* LCD初期化 */
+void CharLcd4bit::Initialize(void)
+{
+    lcd8(0x03, false);//8bit mode
+    lcd8(0x03, false);//8bit mode
+    lcd8(0x03, false);//8bit mode
+    lcd8(0x02, false);//4bit mode
+    lcd4(0x08);//２行表示モード
+    lcd4(0x0c);//表示設定
+    lcd4(0x06);//entry mode
+    lcd4(0x01);//clear
+}
+
+/* 1行出力 */
+void CharLcd4bit::WriteLine(int line, char *str)
+{
+    char *ad=0;
+    
+    // 文字位置指定
+    SetPosition(line, 0);
+
+    ad = str;
+    for(int i = 0; i < CHAR_MAX_PER_LINE; i++)
+    {
+        if(*ad)
+        {
+            WriteChar(*ad);
+            ad++;
+        }
+        else
+        {
+            // 文字数が足りない時は空白で埋める
+            WriteChar(' ');
+        }
+    }
+}
+
+/* 1行出力 */
+void CharLcd4bit::WriteStr(char *str)
+{
+    char *ad=0;
+
+    ad = str;
+    while(*ad)
+    {
+        WriteChar(*ad);
+        ad++;
+    }
+}
+
+/* 1文字出力 */
+void CharLcd4bit::WriteChar(char c)
+{
+    lcd8(c >> 4, true);
+    lcd8(c, true);
+}
+
+/* 文字位置指定 */
+void CharLcd4bit::SetPosition(int line, int position)
+{
+    if(line==1)
+        lcd4(0x80 + position); /*1行目*/
+    else if(line==2)
+        lcd4(0xc0 + position); /*2行目*/
+}
+
+void CharLcd4bit::Clear()
+{
+    lcd4(0x01);
+}
+
+/* 8bitモード出力 -> 4bit接続に変換して出力 */
+void CharLcd4bit::lcd8(char c, bool isData)
+{
+    char temp = c;
+    
+    DB4 = temp & 0x01;
+    temp = temp >> 1;
+
+    DB5 = temp & 0x01;
+    temp = temp >> 1;
+
+    DB6 = temp & 0x01;
+    temp = temp >> 1;
+
+    DB7 = temp & 0x01;
+    
+    if(isData) RS = 1;
+    E=1;
+    WAIT_E();
+    E=0;
+    if(isData) RS = 0;
+    WAIT_E();
+}
+
+/* 4bitモード出力 */
+void CharLcd4bit::lcd4(char data)
+{
+    lcd8(data >> 4, false);
+    lcd8(data, false);
+}
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