_3_seg7x8_test_bsp.rar_断码表7seg

/****************************************************************************** * * * License Agreement * * * * Copyright (c) 2006 Altera Corporation, San Jose, California, USA. * * All rights reserved. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the "Software"), * * to deal in the Software without restriction, including without limitation * * the rights to use, copy, modify, merge, publish, distribute, sublicense, * * and/or sell copies of the Software, and to permit persons to whom the * * Software is furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included in * * all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * * DEALINGS IN THE SOFTWARE. * * * * This agreement shall be governed in all respects by the laws of the State * * of California and by the laws of the United States of America. * * * ******************************************************************************/ /* ===================================================================== */ /* * This file provides the implementation of the functions used to drive a * LCD panel. * * Characters written to the device will appear on the LCD panel as though * it is a very small terminal. If the lines written to the terminal are * longer than the number of characters on the terminal then it will scroll * the lines of text automatically to display them all. * * If more lines are written than will fit on the terminal then it will scroll * when characters are written to the line "below" the last displayed one - * the cursor is allowed to sit below the visible area of the screen providing * that this line is entirely blank. * * The following control sequences may be used to move around and do useful * stuff: * CR Moves back to the start of the current line * LF Moves down a line and back to the start * BS Moves back a character without erasing * ESC Starts a VT100 style escape sequence * * The following escape sequences are recognised: * ESC [ <row> ; <col> H Move to row and column specified (positions are * counted from the top left which is 1;1) * ESC [ K Clear from current position to end of line * ESC [ 2 J Clear screen and go to top left * */ /* ===================================================================== */ #include <string.h> #include <ctype.h> #include <fcntl.h> #include <unistd.h> #include <errno.h> #include "sys/alt_alarm.h" #include "altera_avalon_lcd_16207_regs.h" #include "altera_avalon_lcd_16207.h" /* --------------------------------------------------------------------- */ /* Commands which can be written to the COMMAND register */ enum /* Write to character RAM */ { LCD_CMD_WRITE_DATA = 0x80 /* Bits 6:0 hold character RAM address */ }; enum /* Write to character generator RAM */ { LCD_CMD_WRITE_CGR = 0x40 /* Bits 5:0 hold character generator RAM address */ }; enum /* Function Set command */ { LCD_CMD_FUNCTION_SET = 0x20, LCD_CMD_8BIT = 0x10, LCD_CMD_TWO_LINE = 0x08, LCD_CMD_BIGFONT = 0x04 }; enum /* Shift command */ { LCD_CMD_SHIFT = 0x10, LCD_CMD_SHIFT_DISPLAY = 0x08, LCD_CMD_SHIFT_RIGHT = 0x04 }; enum /* On/Off command */ { LCD_CMD_ONOFF = 0x08, LCD_CMD_ENABLE_DISP = 0x04, LCD_CMD_ENABLE_CURSOR = 0x02, LCD_CMD_ENABLE_BLINK = 0x01 }; enum /* Entry Mode command */ { LCD_CMD_MODES = 0x04, LCD_CMD_MODE_INC = 0x02, LCD_CMD_MODE_SHIFT = 0x01 }; enum /* Home command */ { LCD_CMD_HOME = 0x02 }; enum /* Clear command */ { LCD_CMD_CLEAR = 0x01 }; /* Where in LCD character space do the rows start */ static char colstart[4] = { 0x00, 0x40, 0x20, 0x60 }; /* --------------------------------------------------------------------- */ static void lcd_write_command(altera_avalon_lcd_16207_state* sp, unsigned char command) { unsigned int base = sp->base; /* We impose a timeout on the driver in case the LCD panel isn't connected. * The first time we call this function the timeout is approx 25ms * (assuming 5 cycles per loop and a 200MHz clock). Obviously systems * with slower clocks, or debug builds, or slower memory will take longer. */ int i = 1000000; /* Don't bother if the LCD panel didn't work before */ if (sp->broken) return; /* Wait until LCD isn't busy. */ while (IORD_ALTERA_AVALON_LCD_16207_STATUS(base) & ALTERA_AVALON_LCD_16207_STATUS_BUSY_MSK) if (--i == 0) { sp->broken = 1; return; } /* Despite what it says in the datasheet, the LCD isn't ready to accept * a write immediately after it returns BUSY=0. Wait for 100us more. */ usleep(100); IOWR_ALTERA_AVALON_LCD_16207_COMMAND(base, command); } /* --------------------------------------------------------------------- */ static void lcd_write_data(altera_avalon_lcd_16207_state* sp, unsigned char data) { unsigned int base = sp->base; /* We impose a timeout on the driver in case the LCD panel isn't connected. * The first time we call this function the timeout is approx 25ms * (assuming 5 cycles per loop and a 200MHz clock). Obviously systems * with slower clocks, or debug builds, or slower memory will take longer. */ int i = 1000000; /* Don't bother if the LCD panel didn't work before */ if (sp->broken) return; /* Wait until LCD isn't busy. */ while (IORD_ALTERA_AVALON_LCD_16207_STATUS(base) & ALTERA_AVALON_LCD_16207_STATUS_BUSY_MSK) if (--i == 0) { sp->broken = 1; return; } /* Despite what it says in the datasheet, the LCD isn't ready to accept * a write immediately after it returns BUSY=0. Wait for 100us more. */ usleep(100); IOWR_ALTERA_AVALON_LCD_16207_DATA(base, data); sp->address++; } /* --------------------------------------------------------------------- */ static void lcd_clear_screen(altera_avalon_lcd_16207_state* sp) { int y; lcd_write_command(sp, LCD_CMD_CLEAR); sp->x = 0; sp->y = 0; sp->address = 0; for (y = 0 ; y < ALT_LCD_HEIGHT ; y++) { memset(sp->line[y].data, ' ', sizeof(sp->line[0].data)); memset(sp->line[y].visible, ' ', sizeof(sp->line[0].visible)); sp->line[y].width = 0; } } /* --------------------------------------------------------------------- */