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この2つのコードを使ってLCDの日付けと時刻を表示させたいのです。

2021/01/31 06:27

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DMR

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@@ -1 +1,305 @@
 LCD（SO1602AWWB-UC-WB-U)」を持っています。これを使ってRTC（DS1307）とシリアル通信でLCDに表示させる方法が分かりません。
+```#include <Wire.h>
+int DS1307_ADDRESS=0x68;
+int val=0;
+byte command;
+void  setTime(){
+  byte hour=(Serial.read()<<4);
+  hour=hour+(Serial.read()&0x0F);
+  byte minute=(Serial.read()<<4);
+ minute=minute+(Serial.read()&0x0F);
+  byte sec=(Serial.read()<<4);
+  sec=sec+(Serial.read()&0x0F);
+Wire.beginTransmission(DS1307_ADDRESS);
+Wire.write(val);
+Wire.write(sec);
+Wire.write(minute);
+Wire.write(hour);
+Wire.endTransmission();
+ }
+void setDay(){
+  byte year=(Serial.read()<<4);
+  year=year+(Serial.read()&0x0F);
+  byte month=(Serial.read()<<4);
+  month=month+(Serial.read()&0x0F);
+  byte day=(Serial.read()<<4);
+  day=day+(Serial.read()&0x0F);
+  byte day_of_week=(Serial.read()&0x0F);
+  Wire.beginTransmission(DS1307_ADDRESS);
+  Wire.write(0x03);
+  Wire.write(day_of_week);
+  Wire.write(day);
+  Wire.write(month);
+  Wire.write(year);
+  Wire.endTransmission();
+}
+void printTime(){
+   Wire.beginTransmission(DS1307_ADDRESS);
+   Wire.write(val);
+   Wire.endTransmission();
+   Wire.requestFrom(DS1307_ADDRESS,7);
+   byte r_sec=Wire.read();
+   byte r_minute=Wire.read();
+   byte r_hour=Wire.read();
+   byte r_day_of_week=Wire.read();
+   byte r_date=Wire.read();
+   byte r_month=Wire.read();
+   byte r_year=Wire.read();
+   Serial.print(r_year,HEX);
+   Serial.print("/");
+   Serial.print(r_month,HEX);
+   Serial.print("/");
+   Serial.print(r_date,HEX);
+   Serial.print(" ");
+   Serial.print(r_hour,HEX);
+   Serial.print(":");
+   Serial.print( r_minute,HEX);
+   Serial.print(":");
+   Serial.print( r_sec,HEX);
+   Serial.print(" smtwtfs= ");
+   Serial.println(r_day_of_week,HEX);
+}
+void setup() {
+  Serial.begin(9600);
+  Wire.begin();
+  Serial.flush();
+}
+void loop() {
+  if(Serial.available()){
+    command=Serial.read();
+    if(command==0x74){
+      setTime();
+    }
+    Serial.println(command);
+    if(command==0x64){
+      setDay();
+    }
+  }
+ printTime();
+ delay(2000);
+}
+```#include <Wire.h>
+#define OLED_ADRS 0x3C //SA0=L(SA0=H の場合は 0x3D)
+int DisplayON = 0x0F,
+ClearDisplay = 0x01,
+ReturnHome = 0x02;
+void setup() {
+Wire.begin(); //Wire ﾗｲﾌﾞﾗﾘを初期化し、I2C ﾏｽﾀとしてﾊﾞｽに接続
+init_oled();
+}
+void loop() {
+ char moji[] = "I2C OLED WHITE12345";
+ for(int i = 0; i < 20; i++) {
+ writeData(moji[i]);
+ }
+ writeCommand(0x20+0x80); //2 行目の先頭
+ for(int i = 0; i < 20; i++) {
+ writeData(i+0xB1);
+ }
+contrast_max(); //輝度を最大に設定
+while(1){}
+}
+//----main end----
+void writeData(byte t_data)
+{
+ Wire.beginTransmission(OLED_ADRS);
+ Wire.write(0x40);
+ Wire.write(t_data);
+ Wire.endTransmission();
+delay(1);
+}
+void writeCommand(byte t_command)
+{
+ Wire.beginTransmission(OLED_ADRS);
+ Wire.write(0x00);
+ Wire.write(t_command);
+ Wire.endTransmission();
+delay(10);
+}
+void contrast_max(){
+writeCommand(0x2a);//RE=1
+writeCommand(0x79);//SD=1
+writeCommand(0x81);//コントラストセット
+writeCommand(0xFF);//輝度ＭＡＸ
+writeCommand(0x78);//SD を０にもどす
+writeCommand(0x28); //2C=高文字　28=ノーマル
+delay(100);
+}
+void init_oled()
+{
+delay(100);
+writeCommand(ClearDisplay); // Clear Display
+delay(20);
+writeCommand(ReturnHome); // ReturnHome
+delay(2);
+writeCommand(DisplayON); // Send Display on command
+delay(2);
+writeCommand(ClearDisplay); // Clear Display
+delay(20);
+}
+コード
+```