Stefan Kummer
Contrast not optimal
Fork of
SB1602E
by 
Tedd OKANO
Diff: SB1002E.cpp
- Revision:
- 0:995f80348e02
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SB1002E.cpp Mon Oct 20 12:54:53 2014 +0000
@@ -0,0 +1,250 @@
+/** Text LCD module "SB1602E" class library
+ *
+ * @author Tedd OKANO & Masato YAMANISHI
+ * @version 2.0
+ * @date 20-Oct-2014
+ *
+ * SB1602E is an I2C based low voltage text LCD panel (based Sitronix ST7032 chip)
+ * The module by StrawberryLinux
+ * http://strawberry-linux.com/catalog/items?code=27002 (Online shop page (Japanese))
+ * http://strawberry-linux.com/pub/ST7032i.pdf (datasheet of the chip)
+ *
+ * This is a library to operate this module easy.
+ *
+ * Released under the Apache 2 license License
+ *
+ * revision history (class lib name was "TextLCD_SB1602E")
+ * revision 1.0 22-Jan-2010 a. 1st release
+ * revision 1.1 23-Jan-2010 a. class name has been changed from lcd_SB1602E to TextLCD_SB1602E
+ * b. printf() added
+ * c. copyright notice added
+ * revision 1.3 02-May-2014 a. puticon() added (for SB1602B) by Masato YAMANISHI san
+ * revision 2.0 20-Oct-2014 a. class name is changed and published as "SB1602E"
+ * b. re-written for better usability
+ */
+
+#include <stdarg.h>
+#include "mbed.h"
+#include "SB1602E.h"
+
+
+SB1602E::SB1602E( PinName I2C_sda, PinName I2C_scl, char *init_massage ) : i2c_p( new I2C( I2C_sda, I2C_scl ) ), i2c( *i2c_p )
+{
+ init( init_massage );
+}
+
+SB1602E::SB1602E( I2C &i2c_, char *init_massage ) : i2c_p( NULL ), i2c( i2c_ )
+{
+ init( init_massage );
+}
+
+SB1602E::~SB1602E()
+{
+ if ( NULL != i2c_p )
+ delete i2c_p;
+}
+
+void SB1602E::init( char *init_massage )
+{
+ const char init_seq0[] = {
+ Comm_FunctionSet_Normal,
+ Comm_ReturnHome, // This may be required to reset the scroll function
+ Comm_FunctionSet_Extended,
+ Comm_InternalOscFrequency,
+ Comm_ContrastSet | ( DEFAULT_CONTRAST & 0xF),
+ Comm_PwrIconContrast | ((DEFAULT_CONTRAST >> 4) & 0x3),
+ Comm_FollowerCtrl | 0x0A,
+ };
+ const char init_seq1[] = {
+ Comm_DisplayOnOff,
+ Comm_ClearDisplay,
+ Comm_EntryModeSet,
+ };
+
+ i2c_addr = 0x7C;
+
+ wait( 0.04 ); // interval after hardware reset
+
+ for ( int i = 0; i < sizeof( init_seq0 ); i++ ) {
+ lcd_command( init_seq0[ i ] );
+ wait( 30e-6 );
+ }
+
+ wait( 0.2 );
+
+ for ( int i = 0; i < sizeof( init_seq1 ); i++ ) {
+ lcd_command( init_seq1[ i ] );
+ wait( 2e-3 );
+ }
+
+ set_CGRAM( 7, '\x1F' );
+
+ curs[ 0 ] = 0;
+ curs[ 1 ] = 0;
+
+ if ( init_massage )
+ {
+ puts( 0, init_massage );
+ curs[ 0 ] = 0;
+ }
+}
+
+void SB1602E::printf( char line, char *format, ... )
+{
+ char s[ 32 ];
+ va_list args;
+
+ va_start( args, format );
+ vsnprintf( s, 32, format, args );
+ va_end( args );
+
+ puts( line, s );
+}
+
+void SB1602E::putc( char line, char c )
+{
+ if ( (c == '\n') || (c == '\r') ) {
+ clear_lest_of_line( line );
+ curs[ line ] = 0;
+ return;
+ }
+
+ putcxy( c, curs[ line ]++, line );
+}
+
+void SB1602E::puts( char line, char *s )
+{
+ while ( char c = *s++ )
+ putc( line, c );
+}
+
+void SB1602E::putcxy( char c, char x, char y )
+{
+ const char Comm_SetDDRAMAddress = 0x80;
+ const char DDRAMAddress_Ofst[] = { 0x00, 0x40 };
+
+ if ( (x >= MaxCharsInALine) || (y >= 2) )
+ return;
+
+ lcd_command( (Comm_SetDDRAMAddress | DDRAMAddress_Ofst[ y ]) + x );
+ lcd_data( c );
+}
+
+void SB1602E::clear( void )
+{
+ lcd_command( Comm_ClearDisplay );
+ wait( 2e-3 );
+ curs[ 0 ] = 0;
+ curs[ 1 ] = 0;
+}
+
+void SB1602E::contrast( char contrast )
+{
+ lcd_command( Comm_FunctionSet_Extended );
+ lcd_command( Comm_ContrastSet | (contrast & 0x0f) );
+ lcd_command( Comm_PwrIconContrast | ((contrast>>4) & 0x03) );
+ lcd_command( Comm_FunctionSet_Normal );
+}
+
+void SB1602E::put_custom_char( char c_code, const char *cg, char x, char y )
+{
+ for ( int i = 0; i < 5; i++ ) {
+ set_CGRAM( c_code, cg );
+ putcxy( c_code, x, y );
+ }
+}
+
+void SB1602E::set_CGRAM( char char_code, const char* cg )
+{
+ for ( int i = 0; i < 8; i++ ) {
+ lcd_command( (Comm_SetCGRAM | (char_code << 3) | i) );
+ lcd_data( *cg++ );
+ }
+}
+
+void SB1602E::set_CGRAM( char char_code, char v )
+{
+ char c[ 8 ];
+
+ for ( int i = 0; i < 8; i++ )
+ c[ i ] = v;
+
+ set_CGRAM( char_code, c );
+}
+
+void SB1602E::clear_lest_of_line( char line )
+{
+ for ( int i = curs[ line ]; i < MaxCharsInALine; i++ )
+ putcxy( ' ', i, line );
+}
+
+int SB1602E::lcd_write( char first, char second )
+{
+ char cmd[2];
+
+ cmd[ 0 ] = first;
+ cmd[ 1 ] = second;
+
+ return ( i2c.write( i2c_addr, cmd, 2 ) );
+
+}
+
+int SB1602E::lcd_command( char command )
+{
+ return ( lcd_write( COMMAND, command ) );
+}
+
+int SB1602E::lcd_data( char data )
+{
+ return ( lcd_write( DATA, data ) );
+}
+
+// Following function has been imported from Masato YAMANISHI san's code.
+// Thank you!
+// http://developer.mbed.org/users/masato/code/TextLCD_SB1602E/file/39110c58e55c/TextLCD_SB1602E.h
+
+const unsigned char icon_data[]= {
+ // アイコンアドレス, 該当ビット
+ 0x00, 0x10, // 0b10000,
+ 0x02, 0x10, // 0b10000,
+ 0x04, 0x10, // 0b10000,
+ 0x06, 0x10, // 0b10000,
+
+ 0x07, 0x10, // 0b10000,
+ 0x07, 0x08, // 0b01000,
+ 0x09, 0x10, // 0b10000,
+ 0x0B, 0x10, // 0b10000,
+
+ 0x0D, 0x08, // 0b01000,
+ 0x0D, 0x04, // 0b00100,
+ 0x0D, 0x02, // 0b00010,
+ 0x0D, 0x10, // 0b10000,
+
+ 0x0F, 0x10, // 0b10000, // アンテナマーク
+};
+
+void SB1602E::puticon(unsigned short flg)
+{
+ static unsigned char icon_buff[16]; // アイコンの編集用
+ unsigned char i;
+
+ for(i=0; i<sizeof(icon_data)/2; i++) {
+ if(flg & (0x1000>>i)) { // 該当ビットが立っていたら
+ icon_buff[icon_data[i*2]] |= icon_data[i*2+1]; // バッファを立てます。
+ } else {
+ icon_buff[icon_data[i*2]] &= ~icon_data[i*2+1]; // バッファをクリアします。
+ }
+ }
+ // 一括でLCDに書き込みます。
+ for(i=0; i<16; i++) {
+ lcd_command(Comm_FunctionSet_Extended); // 0b00111001); // コマンド
+ lcd_command(Comm_SetCGRAM + i); // 0b01000000+i); // アイコン領域のアドレスを設定
+ lcd_data(icon_buff[i]); // アイコンデータ
+ }
+}
+
+
+
+
+
+