Dai Yokota / TextLCD_ostream

Using std::ostream with TextLCD

Dependencies:   ACM1602NI TextLCD

Dependents:   TextLCD_ostream_sample

This is class library inherited std::ostream for TextLCD
Because a large amount of memory is needed, do not work in low memory MPU

Sample program is here. And notebook page is here (sorry notebook page is only in Japanese)

TextLCD_ostream.h@1:e46139d4b8ba, 2016-06-18 (annotated)

Committer:
jk1lot
Date:
Sat Jun 18 14:20:29 2016 +0000
Revision:
1:e46139d4b8ba
Parent:
0:4ba062d3d524
Child:
2:eaa44bec9b96
1st published version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jk1lot 0:4ba062d3d524 1 #ifndef TEXTLCD_OSTREAM_H
jk1lot 0:4ba062d3d524 2 #define TEXTLCD_OSTREAM_H
jk1lot 0:4ba062d3d524 3
jk1lot 0:4ba062d3d524 4 #include "TextLCD.h"
jk1lot 0:4ba062d3d524 5 #include<iostream>
jk1lot 0:4ba062d3d524 6 #include <streambuf>
jk1lot 0:4ba062d3d524 7
jk1lot 0:4ba062d3d524 8 class lcd_streambuf : public std::streambuf {
jk1lot 0:4ba062d3d524 9 public:
jk1lot 1:e46139d4b8ba 10 lcd_streambuf() : lcd(NULL) {}
jk1lot 1:e46139d4b8ba 11 lcd_streambuf(TextLCD_Base *p) : lcd(p) {}
jk1lot 1:e46139d4b8ba 12 void setlcd(TextLCD_Base *p) {lcd=p;}
jk1lot 1:e46139d4b8ba 13 TextLCD_Base *getlcd() {return lcd;}
jk1lot 1:e46139d4b8ba 14
jk1lot 1:e46139d4b8ba 15 virtual int_type overflow( int_type c = EOF );
jk1lot 0:4ba062d3d524 16 private:
jk1lot 1:e46139d4b8ba 17 TextLCD_Base *lcd;
jk1lot 0:4ba062d3d524 18 };
jk1lot 0:4ba062d3d524 19
jk1lot 1:e46139d4b8ba 20 /** ostream rapper for TextLCD
jk1lot 1:e46139d4b8ba 21 @code
jk1lot 1:e46139d4b8ba 22 #include "mbed.h"
jk1lot 1:e46139d4b8ba 23 #include "TextLCD_ostream.h"
jk1lot 1:e46139d4b8ba 24
jk1lot 1:e46139d4b8ba 25 I2C i2c(p28,p27); // SDA, SCL
jk1lot 1:e46139d4b8ba 26 TextLCD_I2C_N lcd(&i2c, ST7032_SA, TextLCD::LCD16x2, NC, TextLCD::ST7032_3V3);
jk1lot 1:e46139d4b8ba 27 lcd_ostream lcdstream(&lcd);
jk1lot 1:e46139d4b8ba 28
jk1lot 1:e46139d4b8ba 29 int main() {
jk1lot 1:e46139d4b8ba 30 using namespace std;
jk1lot 1:e46139d4b8ba 31 lcd.setContrast(32);
jk1lot 1:e46139d4b8ba 32 lcdstream.cls() << "Hello world" << endl << "LCD ostream";
jk1lot 1:e46139d4b8ba 33 }
jk1lot 1:e46139d4b8ba 34 @endcode
jk1lot 1:e46139d4b8ba 35 */
jk1lot 0:4ba062d3d524 36 class lcd_ostream : public std::ostream {
jk1lot 0:4ba062d3d524 37 public:
jk1lot 1:e46139d4b8ba 38 /// @param p pointer to object of TextLCD_Base and derived from it
jk1lot 1:e46139d4b8ba 39 lcd_ostream(TextLCD_Base *p);
jk1lot 1:e46139d4b8ba 40 /// set cursor position.
jk1lot 1:e46139d4b8ba 41 /// same as TextLCD::locate(), except return value type
jk1lot 0:4ba062d3d524 42 lcd_ostream& locate(int column, int row);
jk1lot 1:e46139d4b8ba 43 /// clear screen
jk1lot 1:e46139d4b8ba 44 /// same as TextLCD::cls(), except return value type
jk1lot 0:4ba062d3d524 45 lcd_ostream& cls();
jk1lot 1:e46139d4b8ba 46 protected:
jk1lot 1:e46139d4b8ba 47 TextLCD_Base *lcd;
jk1lot 0:4ba062d3d524 48 private:
jk1lot 1:e46139d4b8ba 49 lcd_streambuf lcd_buf;
jk1lot 0:4ba062d3d524 50 };
jk1lot 0:4ba062d3d524 51 #endif