LCD.zip_1602a_单片机_液晶屏

// // LCD.c // is the detail of how to use LCD 1602A on TX-1C platform // the common end of them is negative. // ------> Usage, only for parameter "display_mode" #define LCD_DISPLAY_DEFAULT 0x0E #define LCD_DISPLAY_ON 0x0C #define LCD_CURSOR_ON 0x0A #define LCD_CURSOR_FLASH 0x09 // Usage, only for parameter "cursor_movement" #define LCD_CURSOR_MOVE_DEFAULT 0x06 extern void LCD__show_char( unsigned char content, unsigned char LnSeq, unsigned char ColSeq ); extern void LCD__display( unsigned char content_LtoR[], unsigned char LnSeq, unsigned char ColSeq ); extern void LCD__clear_screen( ); extern unsigned char LCD__get_cursor__line_serial( ); extern unsigned char LCD__get_cursor__column_serial( ); extern void LCD__display_mode__toggle( unsigned char display_mode, unsigned char cursor_movement ); extern void LCD__cursor_move( unsigned char ln_serial, unsigned char col_serial ); // ** !!! NOTICE !!! this library will affect "P0.0" to "P0.7", "P2.6", "P2.7", "P3.4", "P3.5" ports // Add functions ( both inline and separate ): // "LCD__PORT_EN__HIGH_PULZE", // "LCD__check_and_initialize", // "LCD__write_command", // "LCD__write_data", // "LCD__show_char" ** extern // "LCD__display" ** extern // "LCD__clear_screen" ** extern // "LCD__get_cursor__line_serial" ** extern // "LCD__get_cursor__column_serial" ** extern // "LCD__cursor_mode_toggle" ** extern // "LCD__cursor_move" ** extern // "LCD_1602A_initialize" // on 03:15 PM 28/JUN/2017 (UTC+8) // //*********************************************************************************************************** //*********************************************************************************************************** //*********************************************************************************************************** // // ** !!! NOTICE !!! ** // The current version of LCD Library is not ready to cooperate with Roll Screen ops !!!!!!! // //*********************************************************************************************************** //*********************************************************************************************************** //*********************************************************************************************************** #include <reg52.h> #include "TX-1C.h" // Function prototype needed // LCD__INTERNAL_IMPLEMENTATION void LCD_1602A_initialize(); // Mind this crucial guy~! // // Mind!! Serial or Sequence number = ID number + 1 unsigned char LCD_GLOBAL__current_screen_cursor__line_id = 0x00; unsigned char LCD_GLOBAL__current_screen_cursor__column_id = 0x00; unsigned char LCD_GLOBAL__FLAG__is_LCD_initialized = 0; unsigned char LCD_GLOBAL__FLAG__is_LCD_data_pointer_autoincrement_plus = 1; #define LCD__PORT_RS__DATA 1 #define LCD__PORT_RS__COMMAND 0 //#define LCD__PORT_RW__READ 1 // This is cancelled by TX-1C because Port 5 RW is forced to be 0 //#define LCD__PORT_RW__WRITE 0 // This is cancelled by TX-1C because Port 5 RW is forced to be 0 // ------------------------------------------------------------------------------ // TX-1C Platform is USB powered(weak), so we need to disable the Digit Cubes first. sbit dula = P2^6; // 1st 74HC573, select which to show on cubes. sbit wela = P2^7; // 2nd 74HC573, select what to show on cubes. sbit lcden = P3^4; // LCD Port 6 EN: Enable, need pulze. sbit lcdrs = P3^5; // LCD Port 4 RS: select data/command, please use macro /////////////////////////////////////////////////////////////////////////////////////// // Inline Give EN a High Pulze, long enough to let LCD "1602A" be available // Approximately 5ms // LCD__INTERNAL_IMPLEMENTATION #define LCD__PORT_EN__HIGH_PULZE(); { lcden=1; delay(5); lcden=0;} /////////////////////////////////////////////////////////////////////////////////////// // Inline Give LCD commands. // LCD__INTERNAL_IMPLEMENTATION #define LCD__check_and_initialize(); { if ( !LCD_GLOBAL__FLAG__is_LCD_initialized ) LCD_1602A_initialize();} /////////////////////////////////////////////////////////////////////////////////////// // Inline Give LCD commands. // LCD__INTERNAL_IMPLEMENTATION #define LCD__write_command( com_id );\ {\ unsigned char temp_P0 = P0;\ lcdrs = LCD__PORT_RS__COMMAND;\ P0 = com_id;\ delay(5);\ LCD__PORT_EN__HIGH_PULZE();\ P0 = temp_P0;\ } /////////////////////////////////////////////////////////////////////////////////////// // Inline Give LCD data. // LCD__INTERNAL_IMPLEMENTATION #define LCD__write_data( num );\ {\ unsigned char temp_P0 = P0;\ lcdrs = LCD__PORT_RS__DATA;\ P0 = num;\ delay(5);\ LCD__PORT_EN__HIGH_PULZE();\ P0 = temp_P0;\ } /////////////////////////////////////////////////////////////////////////////////////// // LCD__show_char // // TODO: Single character display // Param: @1: character to be shown // @2: where to show, Line sequence 1st ~ 2nd limited, (= 1 to 2 ) decimally // @3: where to show, column sequence 1st ~ 16th limited, (= 1 to 16 ) decimally // Return: Nothing. // // Note! '~' cannot be displayed !!!! // *** ---> !!! Side Effect: Unknown or Non-existing /////////////////////////////////////////////////////////////////////////////////////// extern void LCD__show_char( unsigned char content, unsigned char LnSeq, unsigned char ColSeq ) { LCD__check_and_initialize( ); // TODO: Security Check: if access violation ? if so, abort current ops. if ( !content || !( 1 <= LnSeq && 2 >= LnSeq) || !(1 <= ColSeq && 16>= ColSeq ) ) return ; LCD__cursor_move( LnSeq, ColSeq ); LCD__write_data( content ); LCD_GLOBAL__current_screen_cursor__column_id++; } /////////////////////////////////////////////////////////////////////////////////////// // LCD__display // // TODO: auto-increment=plus display information // Param: @1: The contents( left to right, '\0' terminated ) array to be displayed on cubes. // @2: where to show, Line sequence 1st ~ 2nd limited, (= 1 to 2 ) decimally // @3: where to show, column sequence 1st ~ 16th limited, (= 1 to 16 ) decimally // Return: Nothing. // // Note! '~' cannot be displayed !!!! // *** ---> !!! Side Effect: Unknown or Non-existing /////////////////////////////////////////////////////////////////////////////////////// extern void LCD__display( unsigned char content_LtoR[], unsigned char LnSeq, unsigned char ColSeq ) { unsigned char counter; LCD__check_and_initialize( ); // TODO: Security Check: if access violation ? if so, abort current ops. if ( !content_LtoR || !( 1 <= LnSeq && 2 >= LnSeq) || !(1 <= ColSeq && 16>= ColSeq ) ) return ; LCD__cursor_move( LnSeq, ColSeq ); // TODO: write da