不韋 呂 / UIT_ACM1602NI

Class library for LCD character display ACM1602NI using I2C on Nucleo. Nucleo 用 I2C 接続の LCD キャラクタ･ディスプレー ACM1602Ni 用のクラス･ライブラリ．

Dependents:   UIT2_VariableFIR_LPFHPF UIT2_VariableFIR_LPF UIT2_InputSW_LCD ADDA_Prototype_PollingSW ... more

Diff: ACM1602NI.cpp

Revision:
8:6f28524bcb29
Parent:
7:fd23d2941f36
Child:
10:49e6a8f8fe4f
Child:
11:bbf31054cfd8
diff -r fd23d2941f36 -r 6f28524bcb29 ACM1602NI.cpp
--- a/ACM1602NI.cpp	Sat Jan 17 09:59:57 2015 +0000
+++ b/ACM1602NI.cpp	Thu Mar 26 01:34:27 2015 +0000
@@ -1,7 +1,7 @@
 //-------------------------------------------------------
 //  Class for LCD, ACM1602Ni
 //
-//  2015/01/17, Copyright (c) 2015 MIKAMI, Naoki
+//  2015/03/26, Copyright (c) 2015 MIKAMI, Naoki
 //-------------------------------------------------------
 
 #include "ACM1602NI.hpp"
@@ -65,9 +65,15 @@
     // Send command and data
     bool Acm1602Ni::LcdTx(uint8_t cmdData, uint8_t data)
     {
-        if (!Start()) return false;
+        // Generate start condition
+        i2c_.start();
+
+        // Send slave address
+        TxDR(LCD_ADDRESS_);
+
+        if (!IsTxMode()) return false;
         
-        // defines kind of "data" in next statement
+        // Define kind of "data" in next statement
         TxDR(cmdData);
         TxDR(data);
         wait_us(500);   // indispensable
@@ -78,26 +84,18 @@
         return true;
     }
 
-    // Preparation for send of command and data
-    bool Acm1602Ni::Start()
+    // Check on transmitter mode
+    bool Acm1602Ni::IsTxMode()
     {
-        const uint8_t LENGTH = 10;
-
-        // Generate start condition
-        i2c_.start();
-
-        // Send slave address
-        TxDR(LCD_ADDRESS_);
-        // Confirm on transmit mode
-        for (int n=0; n<LENGTH; n++)
+        for (int n=0; n<10; n++)
         {
             wait_us(10);      
             if (CheckSR12(I2C_SR1_TXE | I2C_SR1_ADDR,
                           I2C_SR2_MSL | I2C_SR2_BUSY
-                                      | I2C_SR2_TRA)) break;
-            if (n == LENGTH-1) return false;
+                                      | I2C_SR2_TRA))
+                return true;
         }
-
-        return true;
+        
+        return false;
     }
 }