不韋 呂 / UIT_AQM1602

I2C 接続の LCD AQM1602XA-RN-GBW 用のライブラリ． Library for LCD 1602XA-RN-GBW connected using I2C interface.

Dependents:   UIT2_MovingAv_Intr UIT2_VariableFIR UIT2_VowelSynthesizer UIT2_ALE_LeakyLMS ... more

Diff: AQM1602.cpp

Revision:
3:414f98234c94
Parent:
1:18cd1c4212c3
Child:
4:c943f05b7843
--- a/AQM1602.cpp	Mon Jun 15 05:26:21 2015 +0000
+++ b/AQM1602.cpp	Sun Jul 05 10:35:49 2015 +0000
@@ -1,7 +1,7 @@
 //-------------------------------------------------------
 //  Class for LCD, AQM1602XA-RN-GBW
 //
-//  2014/06/09, Copyright (c) 2015 MIKAMI, Naoki
+//  2015/07/05, Copyright (c) 2015 MIKAMI, Naoki
 //-------------------------------------------------------
 
 #include "AQM1602.hpp"
@@ -16,7 +16,13 @@
         if (clock != 100000) i2c_.frequency(clock);
 
         wait_ms(40);
-        WriteCmd(0x39); // To extended command
+        connected_ = WriteCmd(0x39);    // To extended command
+        if (!connected_)
+        {
+            fprintf(stderr, "\r\nLCD AQM1602 not connected\r\n");
+            return;
+        }
+
         WriteCmd(0x14); // Internal OSC frequency
         WriteCmd(0x70 | 0x00); // Contrast set
         WriteCmd(0x54 | 0x02); // Power/ICON/Contrast control
@@ -72,11 +78,11 @@
     // Following functions: private
 
     // Send command and data
-    void Aqm1602::LcdTx(uint8_t cmdData, uint8_t data)
+    bool Aqm1602::LcdTx(uint8_t cmdData, uint8_t data)
     {
         char tx[2] = { cmdData, data };
-        i2c_.write(LCD_ADDRESS_, tx, 2);
+        int rt = i2c_.write(LCD_ADDRESS_, tx, 2);
+        return (rt == 0) ? true : false;
     }
 }
 
-