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Add LPC2368 demo.
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Richard Barry
parent
0a6d59a611
commit
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43 changed files with 5064 additions and 2124 deletions
392
Demo/ARM7_LPC2368_Rowley/LCD/portlcd.c
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392
Demo/ARM7_LPC2368_Rowley/LCD/portlcd.c
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/*****************************************************************************
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*
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* Project : lwIP Web
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* Subproject :
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* Name : portlcd.c
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* Function : Routines for LCD
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* Designer : K. Sterckx
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* Creation date : 22/01/2007
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* Compiler : GNU ARM
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* Processor : LPC2368
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* Last update :
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* Last updated by :
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* History :
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* based on example code from NXP
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*
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************************************************************************
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*
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* This code is used to place text on the LCD.
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*
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************************************************************************/
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#include <targets/LPC2368.h>
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#include "portlcd.h"
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#include "FreeRTOS.h"
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#include "Task.h"
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/* Please note, on old MCB2300 board, the LCD_E bit is p1.30, on the new board
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it's p1.31, please check the schematic carefully, and change LCD_CTRL and LCD_E
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accordingly if you have a different board. */
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/* LCD IO definitions */
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#define LCD_E 0x80000000 /* Enable control pin */
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#define LCD_RW 0x20000000 /* Read/Write control pin */
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#define LCD_RS 0x10000000 /* Data/Instruction control */
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#define LCD_CTRL 0xB0000000 /* Control lines mask */
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#define LCD_DATA 0x0F000000 /* Data lines mask */
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/* Local variables */
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static unsigned int lcd_ptr;
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/* 8 user defined characters to be loaded into CGRAM (used for bargraph) */
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static const unsigned char UserFont[8][8] = {
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{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
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{ 0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10 },
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{ 0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x18 },
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{ 0x1C,0x1C,0x1C,0x1C,0x1C,0x1C,0x1C,0x1C },
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{ 0x1E,0x1E,0x1E,0x1E,0x1E,0x1E,0x1E,0x1E },
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{ 0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F },
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{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
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{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }
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};
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/* Local Function Prototypes */
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static void lcd_write( unsigned int c );
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static void lcd_write_4bit( unsigned int c );
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static unsigned int lcd_read_stat( void );
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static void lcd_write_cmd( unsigned int c );
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static void lcd_write_data( unsigned int d );
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static void lcd_wait_busy( void );
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/******************************************************************************
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** Function name: lcd_write_4bit
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**
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** Descriptions:
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**
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** parameters: four bits to write
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** Returned value: None
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**
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******************************************************************************/
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static void lcd_write_4bit(unsigned int c)
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{
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/* Write a 4-bit command to LCD controller. */
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FIO1DIR |= LCD_DATA | LCD_CTRL;
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FIO1CLR = LCD_RW | LCD_DATA;
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FIO1SET = (c & 0xF) << 24;
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FIO1SET = LCD_E;
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vTaskDelay(0);
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FIO1CLR = LCD_E;
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vTaskDelay(0);
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return;
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}
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/******************************************************************************
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** Function name: lcd_write
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**
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** Descriptions:
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**
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** parameters: word to write
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** Returned value: None
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**
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******************************************************************************/
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static void lcd_write(unsigned int c)
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{
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/* Write data/command to LCD controller. */
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lcd_write_4bit (c >> 4);
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lcd_write_4bit (c);
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return;
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}
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/******************************************************************************
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** Function name: lcd_read_stat
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**
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** Descriptions:
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**
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** parameters: None
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** Returned value: status
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**
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******************************************************************************/
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static unsigned int lcd_read_stat(void)
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{
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/* Read status of LCD controller (ST7066) */
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unsigned int stat;
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FIO1DIR &= ~LCD_DATA;
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FIO1CLR = LCD_RS;
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FIO1SET = LCD_RW;
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vTaskDelay( 0 );
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FIO1SET = LCD_E;
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vTaskDelay( 0 );
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stat = (FIO1PIN >> 20) & 0xF0;
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FIO1CLR = LCD_E;
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vTaskDelay( 0 );
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FIO1SET = LCD_E;
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vTaskDelay( 0 );
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stat |= (FIO1PIN >> 24) & 0xF;
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FIO1CLR = LCD_E;
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return (stat);
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}
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/******************************************************************************
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** Function name: lcd_wait_busy
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**
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** Descriptions:
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**
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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static void lcd_wait_busy(void)
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{
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/* Wait until LCD controller (ST7066) is busy. */
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unsigned int stat;
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do
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{
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stat = lcd_read_stat();
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}
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while (stat & 0x80); /* Wait for busy flag */
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return;
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}
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/******************************************************************************
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** Function name: lcd_write_cmd
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**
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** Descriptions:
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**
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** parameters: command word
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** Returned value: None
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**
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******************************************************************************/
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static void lcd_write_cmd(unsigned int c)
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{
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/* Write command to LCD controller. */
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lcd_wait_busy();
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FIO1CLR = LCD_RS;
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lcd_write(c);
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return;
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}
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/******************************************************************************
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** Function name: lcd_write_data
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**
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** Descriptions:
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**
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** parameters: data word
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** Returned value: None
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**
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******************************************************************************/
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static void lcd_write_data(unsigned int d)
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{
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/* Write data to LCD controller. */
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lcd_wait_busy();
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FIO1SET = LCD_RS;
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lcd_write(d);
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return;
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}
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/******************************************************************************
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** Function name: LCD_init
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**
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** Descriptions:
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**
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void LCD_init(void)
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{
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/* Initialize the ST7066 LCD controller to 4-bit mode. */
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PINSEL3 = 0x00000000;
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#if USE_FIO
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SCS |= 0x00000001;/* set GPIOx to use Fast I/O */
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#endif
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FIO1DIR |= LCD_CTRL | LCD_DATA;
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FIO1CLR = LCD_RW | LCD_RS | LCD_DATA;
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lcd_write_4bit(0x3); /* Select 4-bit interface */
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vTaskDelay(100);
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lcd_write_4bit(0x3);
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vTaskDelay(100);
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lcd_write_4bit(0x3);
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lcd_write_4bit(0x2);
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lcd_write_cmd(0x28); /* 2 lines, 5x8 character matrix */
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lcd_write_cmd(0x0e); /* Display ctrl:Disp/Curs/Blnk=ON */
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lcd_write_cmd(0x06); /* Entry mode: Move right, no shift */
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LCD_load( (unsigned char *)&UserFont, sizeof (UserFont) );
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LCD_cls();
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return;
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}
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/******************************************************************************
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** Function name: LCD_load
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**
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** Descriptions:
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**
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** parameters: pointer to the buffer and counter
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** Returned value: None
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**
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******************************************************************************/
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void LCD_load(unsigned char *fp, unsigned int cnt)
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{
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/* Load user-specific characters into CGRAM */
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unsigned int i;
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lcd_write_cmd( 0x40 ); /* Set CGRAM address counter to 0 */
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for (i = 0; i < cnt; i++, fp++)
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{
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lcd_write_data( *fp );
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}
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return;
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}
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/******************************************************************************
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** Function name: LCD_gotoxy
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**
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** Descriptions:
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**
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** parameters: pixel X and Y
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** Returned value: None
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**
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******************************************************************************/
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void LCD_gotoxy(unsigned int x, unsigned int y)
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{
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/* Set cursor position on LCD display. Left corner: 1,1, right: 16,2 */
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unsigned int c;
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c = --x;
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if (--y)
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{
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c |= 0x40;
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}
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lcd_write_cmd (c | 0x80);
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lcd_ptr = y*16 + x;
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return;
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}
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/******************************************************************************
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** Function name: LCD_cls
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**
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** Descriptions:
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**
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void LCD_cls(void)
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{
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/* Clear LCD display, move cursor to home position. */
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lcd_write_cmd (0x01);
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LCD_gotoxy (1,1);
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return;
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}
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/******************************************************************************
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** Function name: LCD_cur_off
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**
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** Descriptions:
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**
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void LCD_cur_off(void)
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{
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/* Switch off LCD cursor. */
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lcd_write_cmd(0x0c);
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return;
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}
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/******************************************************************************
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** Function name: LCD_on
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**
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** Descriptions:
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**
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void LCD_on(void)
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{
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/* Switch on LCD and enable cursor. */
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lcd_write_cmd (0x0e);
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return;
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}
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/******************************************************************************
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** Function name: LCD_putc
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**
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** Descriptions:
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**
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** parameters: unsigned char character
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** Returned value: None
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**
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******************************************************************************/
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void LCD_putc(unsigned char c)
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{
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/* Print a character to LCD at current cursor position. */
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if (lcd_ptr == 16)
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{
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lcd_write_cmd (0xc0);
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}
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lcd_write_data(c);
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lcd_ptr++;
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return;
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}
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/******************************************************************************
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** Function name: LCD_puts
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**
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** Descriptions:
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**
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** parameters: pointer to the buffer
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** Returned value: None
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**
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******************************************************************************/
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void LCD_puts(unsigned char *sp)
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{
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/* Print a string to LCD display. */
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while (*sp)
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{
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LCD_putc (*sp++);
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}
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return;
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}
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/******************************************************************************
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** Function name: LCD_bargraph
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**
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** Descriptions:
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**
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** parameters: value and size
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** Returned value: None
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**
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******************************************************************************/
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void LCD_bargraph(unsigned int val, unsigned int size)
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{
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/* Print a bargraph to LCD display. */
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/* - val: value 0..100 % */
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/* - size: size of bargraph 1..16 */
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unsigned int i;
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val = val * size / 20; /* Display matrix 5 x 8 pixels */
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for (i = 0; i < size; i++)
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{
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if (val > 5)
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{
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LCD_putc(5);
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val -= 5;
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}
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else
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{
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LCD_putc(val);
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break;
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}
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}
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return;
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}
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