CQ Publishing / Mbed 2 deprecated tg_201410s7_lcrmeter

Transistor Gijutsu, October 2014, Special Features Chapter 7，Software of the LCRmeter トランジスタ技術2014年10月号　特集第7章のソフトウェア,サバイバルLCRメータ

Dependencies:   mbed

lcd_P4bit.cpp@0:b3e41ec91adf, 2014-08-28 (annotated)

Committer:
Dance
Date:
Thu Aug 28 07:09:42 2014 +0000
Revision:
0:b3e41ec91adf
????????2014?10?????7????????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Dance 0:b3e41ec91adf 1 //
Dance 0:b3e41ec91adf 2 // HD44780 type 4bit parallel LCD control
Dance 0:b3e41ec91adf 3 //
Dance 0:b3e41ec91adf 4 #include "mbed.h"
Dance 0:b3e41ec91adf 5
Dance 0:b3e41ec91adf 6 DigitalOut LCDRS(P0_3); // LCD module Register Select
Dance 0:b3e41ec91adf 7 DigitalOut LCDE(P0_1); // LCD module Enable
Dance 0:b3e41ec91adf 8 DigitalOut LCDD4(P1_19); // LCD data lines(4bit)
Dance 0:b3e41ec91adf 9 DigitalOut LCDD5(P0_5);
Dance 0:b3e41ec91adf 10 DigitalOut LCDD6(P0_4);
Dance 0:b3e41ec91adf 11 DigitalOut LCDD7(P1_15);
Dance 0:b3e41ec91adf 12
Dance 0:b3e41ec91adf 13 void enable( void )
Dance 0:b3e41ec91adf 14 {
Dance 0:b3e41ec91adf 15 wait_us( 1 );
Dance 0:b3e41ec91adf 16 LCDE = 1;
Dance 0:b3e41ec91adf 17 wait_us( 1 );
Dance 0:b3e41ec91adf 18 LCDE = 0;
Dance 0:b3e41ec91adf 19 wait_us( 1 );
Dance 0:b3e41ec91adf 20 }
Dance 0:b3e41ec91adf 21
Dance 0:b3e41ec91adf 22 void lcd_set4bit( unsigned char d )
Dance 0:b3e41ec91adf 23 {
Dance 0:b3e41ec91adf 24 LCDD4 = d & 0x01;
Dance 0:b3e41ec91adf 25 LCDD5 = d & 0x02;
Dance 0:b3e41ec91adf 26 LCDD6 = d & 0x04;
Dance 0:b3e41ec91adf 27 LCDD7 = d & 0x08;
Dance 0:b3e41ec91adf 28 }
Dance 0:b3e41ec91adf 29
Dance 0:b3e41ec91adf 30 void lcd_write4bit( unsigned char d )
Dance 0:b3e41ec91adf 31 {
Dance 0:b3e41ec91adf 32 lcd_set4bit( d );
Dance 0:b3e41ec91adf 33 enable();
Dance 0:b3e41ec91adf 34 }
Dance 0:b3e41ec91adf 35
Dance 0:b3e41ec91adf 36 void LCD_cmd( char c )
Dance 0:b3e41ec91adf 37 {
Dance 0:b3e41ec91adf 38 LCDRS = 0;
Dance 0:b3e41ec91adf 39 lcd_write4bit( c / 16 );
Dance 0:b3e41ec91adf 40 lcd_write4bit( c & 0x0f );
Dance 0:b3e41ec91adf 41 wait_us( 30 );
Dance 0:b3e41ec91adf 42 }
Dance 0:b3e41ec91adf 43
Dance 0:b3e41ec91adf 44 void LCD_data( char d )
Dance 0:b3e41ec91adf 45 {
Dance 0:b3e41ec91adf 46 LCDRS = 1;
Dance 0:b3e41ec91adf 47 lcd_write4bit( d / 16 );
Dance 0:b3e41ec91adf 48 lcd_write4bit( d & 0x0f );
Dance 0:b3e41ec91adf 49 wait_us( 30 );
Dance 0:b3e41ec91adf 50 }
Dance 0:b3e41ec91adf 51
Dance 0:b3e41ec91adf 52 void LCD_puts( char *s )
Dance 0:b3e41ec91adf 53 {
Dance 0:b3e41ec91adf 54 while( *s ) LCD_data( *s++ );
Dance 0:b3e41ec91adf 55 }
Dance 0:b3e41ec91adf 56
Dance 0:b3e41ec91adf 57 void LCD_iniz( void )
Dance 0:b3e41ec91adf 58 {
Dance 0:b3e41ec91adf 59 LCDE = 0;
Dance 0:b3e41ec91adf 60 LCDRS = 0;
Dance 0:b3e41ec91adf 61 wait_ms( 40 ); // wait 40mS
Dance 0:b3e41ec91adf 62 lcd_write4bit( 0x03 );
Dance 0:b3e41ec91adf 63 wait_ms( 5 );
Dance 0:b3e41ec91adf 64 lcd_write4bit( 0x03 );
Dance 0:b3e41ec91adf 65 wait_ms( 2 );
Dance 0:b3e41ec91adf 66 lcd_write4bit( 0x03 );
Dance 0:b3e41ec91adf 67 wait_ms( 2 );
Dance 0:b3e41ec91adf 68 lcd_write4bit( 0x02 ); // 4bit interface select
Dance 0:b3e41ec91adf 69 LCD_cmd( 0x28 ); // 2 lines 5x8 chr.
Dance 0:b3e41ec91adf 70 LCD_cmd( 0x08 ); // display off
Dance 0:b3e41ec91adf 71 LCD_cmd( 0x01 ); // display clear
Dance 0:b3e41ec91adf 72 wait_ms( 2 );
Dance 0:b3e41ec91adf 73 LCD_cmd( 0x06 ); // entry mode
Dance 0:b3e41ec91adf 74 LCD_cmd( 0x0C ); // display on
Dance 0:b3e41ec91adf 75 }
Dance 0:b3e41ec91adf 76