739 lines
22 KiB
C
Executable File
739 lines
22 KiB
C
Executable File
/*****************************************************************************
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Title : HD44780 Library
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Author : SA Development
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Version: 1.11
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*****************************************************************************/
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#include <avr/pgmspace.h>
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#include <avr/sfr_defs.h>
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#include <inttypes.h>
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#define __ASSERT_USE_STDERR
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#include <assert.h>
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#include "hd44780.h"
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#include "hd44780_settings.h"
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#if (USE_ADELAY_LIBRARY==1)
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#include "adelay.h"
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#else
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#define Delay_ns(__ns) \
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if((unsigned long) (F_CPU/1000000000.0 * __ns) != F_CPU/1000000000.0 * __ns)\
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__builtin_avr_delay_cycles((unsigned long) ( F_CPU/1000000000.0 * __ns)+1);\
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else __builtin_avr_delay_cycles((unsigned long) ( F_CPU/1000000000.0 * __ns))
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#define Delay_us(__us) \
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if((unsigned long) (F_CPU/1000000.0 * __us) != F_CPU/1000000.0 * __us)\
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__builtin_avr_delay_cycles((unsigned long) ( F_CPU/1000000.0 * __us)+1);\
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else __builtin_avr_delay_cycles((unsigned long) ( F_CPU/1000000.0 * __us))
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#define Delay_ms(__ms) \
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if((unsigned long) (F_CPU/1000.0 * __ms) != F_CPU/1000.0 * __ms)\
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__builtin_avr_delay_cycles((unsigned long) ( F_CPU/1000.0 * __ms)+1);\
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else __builtin_avr_delay_cycles((unsigned long) ( F_CPU/1000.0 * __ms))
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#define Delay_s(__s) \
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if((unsigned long) (F_CPU/1.0 * __s) != F_CPU/1.0 * __s)\
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__builtin_avr_delay_cycles((unsigned long) ( F_CPU/1.0 * __s)+1);\
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else __builtin_avr_delay_cycles((unsigned long) ( F_CPU/1.0 * __s))
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#endif
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#if !defined(LCD_BITS) || (LCD_BITS!=4 && LCD_BITS!=8)
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#error LCD_BITS is not defined or not valid.
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#endif
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#if !defined(WAIT_MODE) || (WAIT_MODE!=0 && WAIT_MODE!=1)
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#error WAIT_MODE is not defined or not valid.
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#endif
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#if !defined(RW_LINE_IMPLEMENTED) || (RW_LINE_IMPLEMENTED!=0 && RW_LINE_IMPLEMENTED!=1)
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#error RW_LINE_IMPLEMENTED is not defined or not valid.
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#endif
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#if (WAIT_MODE==1 && RW_LINE_IMPLEMENTED!=1)
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#error WAIT_MODE=1 requires RW_LINE_IMPLEMENTED=1.
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#endif
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#if !defined(LCD_DISPLAYS) || (LCD_DISPLAYS<1) || (LCD_DISPLAYS>4)
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#error LCD_DISPLAYS is not defined or not valid.
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#endif
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// Constants/Macros
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#define PIN(x) (*(&x - 2)) // Address of Data Direction Register of Port X
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#define DDR(x) (*(&x - 1)) // Address of Input Register of Port X
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//PORT defines
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#define lcd_rs_port_low() LCD_RS_PORT&=~_BV(LCD_RS_PIN)
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#if RW_LINE_IMPLEMENTED==1
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#define lcd_rw_port_low() LCD_RW_PORT&=~_BV(LCD_RW_PIN)
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#endif
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#define lcd_db0_port_low() LCD_DB0_PORT&=~_BV(LCD_DB0_PIN)
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#define lcd_db1_port_low() LCD_DB1_PORT&=~_BV(LCD_DB1_PIN)
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#define lcd_db2_port_low() LCD_DB2_PORT&=~_BV(LCD_DB2_PIN)
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#define lcd_db3_port_low() LCD_DB3_PORT&=~_BV(LCD_DB3_PIN)
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#define lcd_db4_port_low() LCD_DB4_PORT&=~_BV(LCD_DB4_PIN)
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#define lcd_db5_port_low() LCD_DB5_PORT&=~_BV(LCD_DB5_PIN)
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#define lcd_db6_port_low() LCD_DB6_PORT&=~_BV(LCD_DB6_PIN)
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#define lcd_db7_port_low() LCD_DB7_PORT&=~_BV(LCD_DB7_PIN)
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#define lcd_rs_port_high() LCD_RS_PORT|=_BV(LCD_RS_PIN)
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#if RW_LINE_IMPLEMENTED==1
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#define lcd_rw_port_high() LCD_RW_PORT|=_BV(LCD_RW_PIN)
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#endif
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#define lcd_db0_port_high() LCD_DB0_PORT|=_BV(LCD_DB0_PIN)
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#define lcd_db1_port_high() LCD_DB1_PORT|=_BV(LCD_DB1_PIN)
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#define lcd_db2_port_high() LCD_DB2_PORT|=_BV(LCD_DB2_PIN)
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#define lcd_db3_port_high() LCD_DB3_PORT|=_BV(LCD_DB3_PIN)
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#define lcd_db4_port_high() LCD_DB4_PORT|=_BV(LCD_DB4_PIN)
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#define lcd_db5_port_high() LCD_DB5_PORT|=_BV(LCD_DB5_PIN)
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#define lcd_db6_port_high() LCD_DB6_PORT|=_BV(LCD_DB6_PIN)
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#define lcd_db7_port_high() LCD_DB7_PORT|=_BV(LCD_DB7_PIN)
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#define lcd_rs_port_set(value) if (value) lcd_rs_port_high(); else lcd_rs_port_low();
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#if RW_LINE_IMPLEMENTED==1
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#define lcd_rw_port_set(value) if (value) lcd_rw_port_high(); else lcd_rw_port_low();
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#endif
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#define lcd_db0_port_set(value) if (value) lcd_db0_port_high(); else lcd_db0_port_low();
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#define lcd_db1_port_set(value) if (value) lcd_db1_port_high(); else lcd_db1_port_low();
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#define lcd_db2_port_set(value) if (value) lcd_db2_port_high(); else lcd_db2_port_low();
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#define lcd_db3_port_set(value) if (value) lcd_db3_port_high(); else lcd_db3_port_low();
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#define lcd_db4_port_set(value) if (value) lcd_db4_port_high(); else lcd_db4_port_low();
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#define lcd_db5_port_set(value) if (value) lcd_db5_port_high(); else lcd_db5_port_low();
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#define lcd_db6_port_set(value) if (value) lcd_db6_port_high(); else lcd_db6_port_low();
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#define lcd_db7_port_set(value) if (value) lcd_db7_port_high(); else lcd_db7_port_low();
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//PIN defines
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#define lcd_db0_pin_get() (((PIN(LCD_DB0_PORT) & _BV(LCD_DB0_PIN))==0)?0:1)
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#define lcd_db1_pin_get() (((PIN(LCD_DB1_PORT) & _BV(LCD_DB1_PIN))==0)?0:1)
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#define lcd_db2_pin_get() (((PIN(LCD_DB2_PORT) & _BV(LCD_DB2_PIN))==0)?0:1)
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#define lcd_db3_pin_get() (((PIN(LCD_DB3_PORT) & _BV(LCD_DB3_PIN))==0)?0:1)
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#define lcd_db4_pin_get() (((PIN(LCD_DB4_PORT) & _BV(LCD_DB4_PIN))==0)?0:1)
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#define lcd_db5_pin_get() (((PIN(LCD_DB5_PORT) & _BV(LCD_DB5_PIN))==0)?0:1)
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#define lcd_db6_pin_get() (((PIN(LCD_DB6_PORT) & _BV(LCD_DB6_PIN))==0)?0:1)
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#define lcd_db7_pin_get() (((PIN(LCD_DB7_PORT) & _BV(LCD_DB7_PIN))==0)?0:1)
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//DDR defines
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#define lcd_rs_ddr_low() DDR(LCD_RS_PORT)&=~_BV(LCD_RS_PIN)
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#if RW_LINE_IMPLEMENTED==1
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#define lcd_rw_ddr_low() DDR(LCD_RW_PORT)&=~_BV(LCD_RW_PIN)
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#endif
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#define lcd_db0_ddr_low() DDR(LCD_DB0_PORT)&=~_BV(LCD_DB0_PIN)
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#define lcd_db1_ddr_low() DDR(LCD_DB1_PORT)&=~_BV(LCD_DB1_PIN)
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#define lcd_db2_ddr_low() DDR(LCD_DB2_PORT)&=~_BV(LCD_DB2_PIN)
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#define lcd_db3_ddr_low() DDR(LCD_DB3_PORT)&=~_BV(LCD_DB3_PIN)
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#define lcd_db4_ddr_low() DDR(LCD_DB4_PORT)&=~_BV(LCD_DB4_PIN)
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#define lcd_db5_ddr_low() DDR(LCD_DB5_PORT)&=~_BV(LCD_DB5_PIN)
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#define lcd_db6_ddr_low() DDR(LCD_DB6_PORT)&=~_BV(LCD_DB6_PIN)
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#define lcd_db7_ddr_low() DDR(LCD_DB7_PORT)&=~_BV(LCD_DB7_PIN)
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#define lcd_rs_ddr_high() DDR(LCD_RS_PORT)|=_BV(LCD_RS_PIN)
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#if RW_LINE_IMPLEMENTED==1
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#define lcd_rw_ddr_high() DDR(LCD_RW_PORT)|=_BV(LCD_RW_PIN)
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#endif
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#define lcd_db0_ddr_high() DDR(LCD_DB0_PORT)|=_BV(LCD_DB0_PIN)
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#define lcd_db1_ddr_high() DDR(LCD_DB1_PORT)|=_BV(LCD_DB1_PIN)
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#define lcd_db2_ddr_high() DDR(LCD_DB2_PORT)|=_BV(LCD_DB2_PIN)
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#define lcd_db3_ddr_high() DDR(LCD_DB3_PORT)|=_BV(LCD_DB3_PIN)
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#define lcd_db4_ddr_high() DDR(LCD_DB4_PORT)|=_BV(LCD_DB4_PIN)
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#define lcd_db5_ddr_high() DDR(LCD_DB5_PORT)|=_BV(LCD_DB5_PIN)
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#define lcd_db6_ddr_high() DDR(LCD_DB6_PORT)|=_BV(LCD_DB6_PIN)
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#define lcd_db7_ddr_high() DDR(LCD_DB7_PORT)|=_BV(LCD_DB7_PIN)
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#define lcd_rs_ddr_set(value) if (value) lcd_rs_ddr_high(); else lcd_rs_ddr_low();
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#if RW_LINE_IMPLEMENTED==1
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#define lcd_rw_ddr_set(value) if (value) lcd_rw_ddr_high(); else lcd_rw_ddr_low();
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#endif
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#define lcd_db0_ddr_set(value) if (value) lcd_db0_ddr_high(); else lcd_db0_ddr_low();
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#define lcd_db1_ddr_set(value) if (value) lcd_db1_ddr_high(); else lcd_db1_ddr_low();
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#define lcd_db2_ddr_set(value) if (value) lcd_db2_ddr_high(); else lcd_db2_ddr_low();
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#define lcd_db3_ddr_set(value) if (value) lcd_db3_ddr_high(); else lcd_db3_ddr_low();
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#define lcd_db4_ddr_set(value) if (value) lcd_db4_ddr_high(); else lcd_db4_ddr_low();
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#define lcd_db5_ddr_set(value) if (value) lcd_db5_ddr_high(); else lcd_db5_ddr_low();
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#define lcd_db6_ddr_set(value) if (value) lcd_db6_ddr_high(); else lcd_db6_ddr_low();
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#define lcd_db7_ddr_set(value) if (value) lcd_db7_ddr_high(); else lcd_db7_ddr_low();
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#if (WAIT_MODE==1 && RW_LINE_IMPLEMENTED==1)
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static unsigned char PrevCmdInvolvedAddressCounter=0;
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#endif
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#if (LCD_DISPLAYS>1)
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static unsigned char ActiveDisplay=1;
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#endif
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static inline void lcd_e_port_low()
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{
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#if (LCD_DISPLAYS>1)
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switch (ActiveDisplay)
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{
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case 2 : LCD_E2_PORT&=~_BV(LCD_E2_PIN);
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break;
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#if (LCD_DISPLAYS>=3)
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case 3 : LCD_E3_PORT&=~_BV(LCD_E3_PIN);
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break;
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#endif
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#if (LCD_DISPLAYS==4)
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case 4 : LCD_E4_PORT&=~_BV(LCD_E4_PIN);
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break;
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#endif
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default :
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#endif
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LCD_E_PORT&=~_BV(LCD_E_PIN);
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#if (LCD_DISPLAYS>1)
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}
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#endif
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}
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static inline void lcd_e_port_high()
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{
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#if (LCD_DISPLAYS>1)
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switch (ActiveDisplay)
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{
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case 2 : LCD_E2_PORT|=_BV(LCD_E2_PIN);
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break;
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#if (LCD_DISPLAYS>=3)
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case 3 : LCD_E3_PORT|=_BV(LCD_E3_PIN);
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break;
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#endif
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#if (LCD_DISPLAYS==4)
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case 4 : LCD_E4_PORT|=_BV(LCD_E4_PIN);
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break;
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#endif
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default :
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#endif
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LCD_E_PORT|=_BV(LCD_E_PIN);
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#if (LCD_DISPLAYS>1)
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}
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#endif
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}
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static inline void lcd_e_ddr_low()
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{
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#if (LCD_DISPLAYS>1)
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switch (ActiveDisplay)
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{
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case 2 : DDR(LCD_E2_PORT)&=~_BV(LCD_E2_PIN);
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break;
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#if (LCD_DISPLAYS>=3)
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case 3 : DDR(LCD_E3_PORT)&=~_BV(LCD_E3_PIN);
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break;
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#endif
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#if (LCD_DISPLAYS==4)
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case 4 : DDR(LCD_E4_PORT)&=~_BV(LCD_E4_PIN);
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break;
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#endif
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default :
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#endif
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DDR(LCD_E_PORT)&=~_BV(LCD_E_PIN);
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#if (LCD_DISPLAYS>1)
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}
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#endif
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}
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static inline void lcd_e_ddr_high()
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{
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#if (LCD_DISPLAYS>1)
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switch (ActiveDisplay)
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{
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case 2 : DDR(LCD_E2_PORT)|=_BV(LCD_E2_PIN);
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break;
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#if (LCD_DISPLAYS>=3)
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case 3 : DDR(LCD_E3_PORT)|=_BV(LCD_E3_PIN);
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break;
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#endif
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#if (LCD_DISPLAYS==4)
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case 4 : DDR(LCD_E4_PORT)|=_BV(LCD_E4_PIN);
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break;
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#endif
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default :
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#endif
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DDR(LCD_E_PORT)|=_BV(LCD_E_PIN);
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#if (LCD_DISPLAYS>1)
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}
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#endif
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}
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/*************************************************************************
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loops while lcd is busy, returns address counter
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*************************************************************************/
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#if (WAIT_MODE==1 && RW_LINE_IMPLEMENTED==1)
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static uint8_t lcd_read(uint8_t rs);
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static void lcd_waitbusy(void)
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{
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register uint8_t c;
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unsigned int ul1=0;
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while ( ((c=lcd_read(0)) & (1<<LCD_BUSY)) && ul1<((F_CPU/16384>=16)?F_CPU/16384:16)) // Wait Until Busy Flag is Cleared
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ul1++;
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}
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#endif
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/*************************************************************************
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Low-level function to read byte from LCD controller
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Input: rs 1: read data
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0: read busy flag / address counter
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Returns: byte read from LCD controller
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*************************************************************************/
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#if RW_LINE_IMPLEMENTED==1
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static uint8_t lcd_read(uint8_t rs)
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{
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uint8_t data;
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#if (WAIT_MODE==1 && RW_LINE_IMPLEMENTED==1)
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if (rs)
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lcd_waitbusy();
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if (PrevCmdInvolvedAddressCounter)
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{
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Delay_us(5);
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PrevCmdInvolvedAddressCounter=0;
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}
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#endif
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if (rs)
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{
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lcd_rs_port_high(); // RS=1: Read Data
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#if (WAIT_MODE==1 && RW_LINE_IMPLEMENTED==1)
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PrevCmdInvolvedAddressCounter=1;
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#endif
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}
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else lcd_rs_port_low(); // RS=0: Read Busy Flag
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lcd_rw_port_high(); // RW=1: Read Mode
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#if LCD_BITS==4
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lcd_db7_ddr_low(); // Configure Data Pins as Input
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lcd_db6_ddr_low();
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lcd_db5_ddr_low();
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lcd_db4_ddr_low();
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lcd_e_port_high(); // Read High Nibble First
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Delay_ns(500);
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data=lcd_db4_pin_get() << 4 | lcd_db5_pin_get() << 5 |
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lcd_db6_pin_get() << 6 | lcd_db7_pin_get() << 7;
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lcd_e_port_low();
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Delay_ns(500);
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lcd_e_port_high(); // Read Low Nibble
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Delay_ns(500);
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data|=lcd_db4_pin_get() << 0 | lcd_db5_pin_get() << 1 |
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lcd_db6_pin_get() << 2 | lcd_db7_pin_get() << 3;
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lcd_e_port_low();
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lcd_db7_ddr_high(); // Configure Data Pins as Output
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lcd_db6_ddr_high();
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lcd_db5_ddr_high();
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lcd_db4_ddr_high();
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lcd_db7_port_high(); // Pins High (Inactive)
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lcd_db6_port_high();
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lcd_db5_port_high();
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lcd_db4_port_high();
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#else //using 8-Bit-Mode
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lcd_db7_ddr_low(); // Configure Data Pins as Input
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lcd_db6_ddr_low();
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lcd_db5_ddr_low();
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lcd_db4_ddr_low();
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lcd_db3_ddr_low();
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lcd_db2_ddr_low();
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lcd_db1_ddr_low();
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lcd_db0_ddr_low();
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lcd_e_port_high();
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Delay_ns(500);
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data=lcd_db7_pin_get() << 7 | lcd_db6_pin_get() << 6 |
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lcd_db5_pin_get() << 5 | lcd_db4_pin_get() << 4 |
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lcd_db3_pin_get() << 3 | lcd_db2_pin_get() << 2 |
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lcd_db1_pin_get() << 1 | lcd_db0_pin_get();
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lcd_e_port_low();
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lcd_db7_ddr_high(); // Configure Data Pins as Output
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lcd_db6_ddr_high();
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lcd_db5_ddr_high();
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lcd_db4_ddr_high();
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lcd_db3_ddr_high();
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lcd_db2_ddr_high();
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lcd_db1_ddr_high();
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lcd_db0_ddr_high();
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lcd_db7_port_high(); // Pins High (Inactive)
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lcd_db6_port_high();
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lcd_db5_port_high();
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lcd_db4_port_high();
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lcd_db3_port_high();
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lcd_db2_port_high();
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lcd_db1_port_high();
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lcd_db0_port_high();
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#endif
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lcd_rw_port_low();
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#if (WAIT_MODE==0 || RW_LINE_IMPLEMENTED==0)
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if (rs)
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Delay_us(40);
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else Delay_us(1);
|
|
#endif
|
|
return data;
|
|
}
|
|
|
|
uint8_t lcd_getc()
|
|
{
|
|
return lcd_read(1);
|
|
}
|
|
|
|
#endif
|
|
|
|
/*************************************************************************
|
|
Low-level function to write byte to LCD controller
|
|
Input: data byte to write to LCD
|
|
rs 1: write data
|
|
0: write instruction
|
|
Returns: none
|
|
*************************************************************************/
|
|
static void lcd_write(uint8_t data,uint8_t rs)
|
|
{
|
|
#if (WAIT_MODE==1 && RW_LINE_IMPLEMENTED==1)
|
|
lcd_waitbusy();
|
|
if (PrevCmdInvolvedAddressCounter)
|
|
{
|
|
Delay_us(5);
|
|
PrevCmdInvolvedAddressCounter=0;
|
|
}
|
|
#endif
|
|
|
|
if (rs)
|
|
{
|
|
lcd_rs_port_high(); // RS=1: Write Character
|
|
#if (WAIT_MODE==1 && RW_LINE_IMPLEMENTED==1)
|
|
PrevCmdInvolvedAddressCounter=1;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
lcd_rs_port_low(); // RS=0: Write Command
|
|
#if (WAIT_MODE==1 && RW_LINE_IMPLEMENTED==1)
|
|
PrevCmdInvolvedAddressCounter=0;
|
|
#endif
|
|
}
|
|
|
|
#if LCD_BITS==4
|
|
lcd_db7_port_set(data&_BV(7)); //Output High Nibble
|
|
lcd_db6_port_set(data&_BV(6));
|
|
lcd_db5_port_set(data&_BV(5));
|
|
lcd_db4_port_set(data&_BV(4));
|
|
|
|
Delay_ns(100);
|
|
lcd_e_port_high();
|
|
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
|
|
lcd_db7_port_set(data&_BV(3)); //Output High Nibble
|
|
lcd_db6_port_set(data&_BV(2));
|
|
lcd_db5_port_set(data&_BV(1));
|
|
lcd_db4_port_set(data&_BV(0));
|
|
|
|
Delay_ns(100);
|
|
lcd_e_port_high();
|
|
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
|
|
lcd_db7_port_high(); // All Data Pins High (Inactive)
|
|
lcd_db6_port_high();
|
|
lcd_db5_port_high();
|
|
lcd_db4_port_high();
|
|
|
|
#else //using 8-Bit_Mode
|
|
lcd_db7_port_set(data&_BV(7)); //Output High Nibble
|
|
lcd_db6_port_set(data&_BV(6));
|
|
lcd_db5_port_set(data&_BV(5));
|
|
lcd_db4_port_set(data&_BV(4));
|
|
lcd_db3_port_set(data&_BV(3)); //Output High Nibble
|
|
lcd_db2_port_set(data&_BV(2));
|
|
lcd_db1_port_set(data&_BV(1));
|
|
lcd_db0_port_set(data&_BV(0));
|
|
|
|
Delay_ns(100);
|
|
lcd_e_port_high();
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
|
|
lcd_db7_port_high(); // All Data Pins High (Inactive)
|
|
lcd_db6_port_high();
|
|
lcd_db5_port_high();
|
|
lcd_db4_port_high();
|
|
lcd_db3_port_high();
|
|
lcd_db2_port_high();
|
|
lcd_db1_port_high();
|
|
lcd_db0_port_high();
|
|
#endif
|
|
|
|
#if (WAIT_MODE==0 || RW_LINE_IMPLEMENTED==0)
|
|
if (!rs && data<=((1<<LCD_CLR) | (1<<LCD_HOME))) // Is command clrscr or home?
|
|
Delay_us(1640);
|
|
else Delay_us(40);
|
|
#endif
|
|
}
|
|
|
|
/*************************************************************************
|
|
Send LCD controller instruction command
|
|
Input: instruction to send to LCD controller, see HD44780 data sheet
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_command(uint8_t cmd)
|
|
{
|
|
lcd_write(cmd,0);
|
|
}
|
|
|
|
/*************************************************************************
|
|
Set cursor to specified position
|
|
Input: pos position
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_goto(uint8_t pos)
|
|
{
|
|
//Do not go outside of screen limits
|
|
assert(pos < LCD_COLS_MAX);
|
|
lcd_command((1<<LCD_DDRAM)+pos);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
Clear screen
|
|
Input: none
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_clrscr()
|
|
{
|
|
lcd_command(1<<LCD_CLR);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
Return home
|
|
Input: none
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_home()
|
|
{
|
|
lcd_command(1<<LCD_HOME);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
Display character
|
|
Input: character to be displayed
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_putc(char c)
|
|
{
|
|
lcd_write(c,1);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
Display string
|
|
Input: string to be displayed
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_puts(const char *s)
|
|
{
|
|
register char c;
|
|
|
|
while ((c=*s++))
|
|
lcd_putc(c);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
Display string from flash
|
|
Input: string to be displayed
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_puts_P(const char *progmem_s)
|
|
{
|
|
register char c;
|
|
|
|
while ((c=pgm_read_byte(progmem_s++)))
|
|
lcd_putc(c);
|
|
}
|
|
|
|
/*************************************************************************
|
|
Initialize display
|
|
Input: none
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_init()
|
|
{
|
|
//Set All Pins as Output
|
|
lcd_e_ddr_high();
|
|
lcd_rs_ddr_high();
|
|
#if RW_LINE_IMPLEMENTED==1
|
|
lcd_rw_ddr_high();
|
|
#endif
|
|
lcd_db7_ddr_high();
|
|
lcd_db6_ddr_high();
|
|
lcd_db5_ddr_high();
|
|
lcd_db4_ddr_high();
|
|
#if LCD_BITS==8
|
|
lcd_db3_ddr_high();
|
|
lcd_db2_ddr_high();
|
|
lcd_db1_ddr_high();
|
|
lcd_db0_ddr_high();
|
|
#endif
|
|
|
|
//Set All Control Lines Low
|
|
lcd_e_port_low();
|
|
lcd_rs_port_low();
|
|
#if RW_LINE_IMPLEMENTED==1
|
|
lcd_rw_port_low();
|
|
#endif
|
|
|
|
//Set All Data Lines High
|
|
lcd_db7_port_high();
|
|
lcd_db6_port_high();
|
|
lcd_db5_port_high();
|
|
lcd_db4_port_high();
|
|
#if LCD_BITS==8
|
|
lcd_db3_port_high();
|
|
lcd_db2_port_high();
|
|
lcd_db1_port_high();
|
|
lcd_db0_port_high();
|
|
#endif
|
|
|
|
//Startup Delay
|
|
Delay_ms(DELAY_RESET);
|
|
|
|
//Initialize Display
|
|
lcd_db7_port_low();
|
|
lcd_db6_port_low();
|
|
Delay_ns(100);
|
|
lcd_e_port_high();
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
|
|
Delay_us(4100);
|
|
|
|
lcd_e_port_high();
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
|
|
Delay_us(100);
|
|
|
|
lcd_e_port_high();
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
|
|
Delay_us(40);
|
|
|
|
//Init differs between 4-bit and 8-bit from here
|
|
#if (LCD_BITS==4)
|
|
lcd_db4_port_low();
|
|
Delay_ns(100);
|
|
lcd_e_port_high();
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
Delay_us(40);
|
|
|
|
lcd_db4_port_low();
|
|
Delay_ns(100);
|
|
lcd_e_port_high();
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
Delay_ns(500);
|
|
|
|
#if (LCD_DISPLAYS==1)
|
|
if (LCD_DISPLAY_LINES>1)
|
|
lcd_db7_port_high();
|
|
#else
|
|
unsigned char c;
|
|
switch (ActiveDisplay)
|
|
{
|
|
case 1 : c=LCD_DISPLAY_LINES; break;
|
|
case 2 : c=LCD_DISPLAY2_LINES; break;
|
|
#if (LCD_DISPLAYS>=3)
|
|
case 3 : c=LCD_DISPLAY3_LINES; break;
|
|
#endif
|
|
#if (LCD_DISPLAYS==4)
|
|
case 4 : c=LCD_DISPLAY4_LINES; break;
|
|
#endif
|
|
}
|
|
if (c>1)
|
|
lcd_db7_port_high();
|
|
#endif
|
|
|
|
Delay_ns(100);
|
|
lcd_e_port_high();
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
Delay_us(40);
|
|
#else
|
|
#if (LCD_DISPLAYS==1)
|
|
if (LCD_DISPLAY_LINES<2)
|
|
lcd_db3_port_low();
|
|
#else
|
|
unsigned char c;
|
|
switch (ActiveDisplay)
|
|
{
|
|
case 1 : c=LCD_DISPLAY_LINES; break;
|
|
case 2 : c=LCD_DISPLAY2_LINES; break;
|
|
#if (LCD_DISPLAYS>=3)
|
|
case 3 : c=LCD_DISPLAY3_LINES; break;
|
|
#endif
|
|
#if (LCD_DISPLAYS==4)
|
|
case 4 : c=LCD_DISPLAY4_LINES; break;
|
|
#endif
|
|
}
|
|
if (c<2)
|
|
lcd_db3_port_low();
|
|
#endif
|
|
|
|
lcd_db2_port_low();
|
|
Delay_ns(100);
|
|
lcd_e_port_high();
|
|
Delay_ns(500);
|
|
lcd_e_port_low();
|
|
Delay_us(40);
|
|
#endif
|
|
|
|
//Display Off
|
|
lcd_command(_BV(LCD_DISPLAYMODE));
|
|
|
|
//Display Clear
|
|
lcd_clrscr();
|
|
|
|
//Entry Mode Set
|
|
lcd_command(_BV(LCD_ENTRY_MODE) | _BV(LCD_ENTRY_INC));
|
|
|
|
//Display On
|
|
lcd_command(_BV(LCD_DISPLAYMODE) | _BV(LCD_DISPLAYMODE_ON));
|
|
}
|
|
|
|
#if (LCD_DISPLAYS>1)
|
|
void lcd_use_display(int ADisplay)
|
|
{
|
|
if (ADisplay>=1 && ADisplay<=LCD_DISPLAYS)
|
|
ActiveDisplay=ADisplay;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*************************************************************************
|
|
Clear characters at position until length
|
|
Input: start position and lentgh
|
|
Returns: none
|
|
*************************************************************************/
|
|
void lcd_clr(uint8_t pos, uint8_t len)
|
|
{
|
|
for (int i = 0; i < len; i++) {
|
|
lcd_goto(pos + i);
|
|
lcd_putc(' ');
|
|
}
|
|
}
|
|
|