--- /dev/null
+/**
+ * \file
+ * <!--
+ * Copyright 2003, 2004, 2005, 2006 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 2001 Bernardo Innocenti <bernie@codewiz.org>
+ * This file is part of DevLib - See README.devlib for information.
+ * -->
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ * \author Stefano Fedrigo <aleph@develer.com>
+ *
+ * \brief Displaytech 32122A LCD driver
+ */
+
+/*#*
+ *#* $Log$
+ *#* Revision 1.1 2006/01/16 03:50:57 bernie
+ *#* Import into DevLib.
+ *#*
+ *#*/
+
+#include "lcd.h"
+#include <gfx/gfx.h>
+#include <drv/timer.h>
+
+#include <cfg/cpu.h>
+#include <hw.h>
+#include <cfg/macros.h> /* BV() */
+#include <cfg/debug.h>
+
+#include <avr/io.h>
+#include <stdbool.h>
+#include <inttypes.h>
+
+#ifdef CONFIG_LCD_SOFTINT_REFRESH
+
+ /*! Interval between softint driven lcd refresh */
+# define LCD_REFRESH_INTERVAL 20 /* 20ms -> 50fps */
+
+#endif /* CONFIG_LCD_SOFTINT_REFRESH */
+
+/*! Number of LCD pages */
+#define LCD_PAGES 4
+
+/*! Width of an LCD page */
+#define LCD_PAGESIZE (LCD_WIDTH / 2)
+
+/*!
+ * \name LCD I/O pins/ports
+ * @{
+ */
+#define LCD_PF_DB0 PF4
+#define LCD_PF_DB1 PF5
+#define LCD_PF_DB2 PF6
+#define LCD_PF_DB3 PF7
+#define LCD_PD_DB4 PD4
+#define LCD_PD_DB5 PD5
+#define LCD_PD_DB6 PD6
+#define LCD_PD_DB7 PD7
+#define LCD_PB_A0 PB0
+#define LCD_PE_RW PE7
+#define LCD_PE_E1 PE2
+#define LCD_PE_E2 PE6
+/*@}*/
+
+/*!
+ * \name DB high nibble (DB[4-7])
+ * @{
+ */
+#define LCD_DATA_HI_PORT PORTD
+#define LCD_DATA_HI_PIN PIND
+#define LCD_DATA_HI_DDR DDRD
+#define LCD_DATA_HI_SHIFT 0
+#define LCD_DATA_HI_MASK 0xF0
+/*@}*/
+
+/*!
+ * \name DB low nibble (DB[0-3])
+ * @{
+ */
+#define LCD_DATA_LO_PORT PORTF
+#define LCD_DATA_LO_PIN PINF
+#define LCD_DATA_LO_DDR DDRF
+#define LCD_DATA_LO_SHIFT 4
+#define LCD_DATA_LO_MASK 0xF0
+/*@}*/
+
+/*!
+ * \name LCD bus control macros
+ * @{
+ */
+#define LCD_CLR_A0 (PORTB &= ~BV(LCD_PB_A0))
+#define LCD_SET_A0 (PORTB |= BV(LCD_PB_A0))
+#define LCD_CLR_RD (PORTE &= ~BV(LCD_PE_RW))
+#define LCD_SET_RD (PORTE |= BV(LCD_PE_RW))
+#define LCD_CLR_E1 (PORTE &= ~BV(LCD_PE_E1))
+#define LCD_SET_E1 (PORTE |= BV(LCD_PE_E1))
+#define LCD_CLR_E2 (PORTE &= ~BV(LCD_PE_E2))
+#define LCD_SET_E2 (PORTE |= BV(LCD_PE_E2))
+#define LCD_SET_E(x) (PORTE |= (x))
+#define LCD_CLR_E(x) (PORTE &= ~(x))
+/*@}*/
+
+/*!
+ * \name Chip select bits for LCD_SET_E()
+ * @{
+ */
+#define LCDF_E1 (BV(LCD_PE_E1))
+#define LCDF_E2 (BV(LCD_PE_E2))
+/*@}*/
+
+/*! Read from the LCD data bus (DB[0-7]) */
+#define LCD_READ ( \
+ ((LCD_DATA_LO_PIN & LCD_DATA_LO_MASK) >> LCD_DATA_LO_SHIFT) | \
+ ((LCD_DATA_HI_PIN & LCD_DATA_HI_MASK) >> LCD_DATA_HI_SHIFT) \
+ )
+
+/*! Write to the LCD data bus (DB[0-7]) */
+#define LCD_WRITE(d) \
+ do { \
+ LCD_DATA_LO_PORT = (LCD_DATA_LO_PORT & ~LCD_DATA_LO_MASK) | (((d)<<LCD_DATA_LO_SHIFT) & LCD_DATA_LO_MASK); \
+ LCD_DATA_HI_PORT = (LCD_DATA_HI_PORT & ~LCD_DATA_HI_MASK) | (((d)<<LCD_DATA_HI_SHIFT) & LCD_DATA_HI_MASK); \
+ } while (0)
+
+/*! Set data bus direction to output (write to display) */
+#define LCD_DB_OUT \
+ do { \
+ LCD_DATA_LO_DDR |= LCD_DATA_LO_MASK; \
+ LCD_DATA_HI_DDR |= LCD_DATA_HI_MASK; \
+ } while (0)
+
+/*! Set data bus direction to input (read from display) */
+#define LCD_DB_IN \
+ do { \
+ LCD_DATA_LO_DDR &= ~LCD_DATA_LO_MASK; \
+ LCD_DATA_HI_DDR &= ~LCD_DATA_HI_MASK; \
+ } while (0)
+
+/*! Delay for tEW (160ns) */
+#define LCD_DELAY_WRITE \
+ do { \
+ NOP; \
+ NOP; \
+ } while (0)
+
+/*! Delay for tACC6 (180ns) */
+#define LCD_DELAY_READ \
+ do { \
+ NOP; \
+ NOP; \
+ NOP; \
+ } while (0)
+
+
+/*!
+ * \name 32122A Commands
+ * @{
+ */
+#define LCD_CMD_DISPLAY_ON 0xAF
+#define LCD_CMD_DISPLAY_OFF 0xAE
+#define LCD_CMD_STARTLINE 0xC0
+#define LCD_CMD_PAGEADDR 0xB8
+#define LCD_CMD_COLADDR 0x00
+#define LCD_CMD_ADC_LEFT 0xA1
+#define LCD_CMD_ADC_RIGHT 0xA0
+#define LCD_CMD_STATIC_OFF 0xA4
+#define LCD_CMD_STATIC_ON 0xA5
+#define LCD_CMD_DUTY_32 0xA9
+#define LCD_CMD_DUTY_16 0xA8
+#define LCD_CMD_RMW_ON 0xE0
+#define LCD_CMD_RMW_OFF 0xEE
+#define LCD_CMD_RESET 0xE2
+/*@}*/
+
+/* Status flags */
+#define LCDF_BUSY BV(7)
+
+#ifdef CONFIG_LCD_WAIT
+/*!
+ * \code
+ * __ __
+ * RS __\____________/__
+ * ____________
+ * R/W __/ \__
+ * _______
+ * E1 _____/ \____
+ * ______ ____
+ * DATA X/ \====/
+ *
+ * \endcode
+ */
+#define WAIT_LCD \
+ do { \
+ uint8_t status; \
+ LCD_DB_IN; \
+ do { \
+ LCD_SET_RD; \
+ LCD_CLR_A0; \
+ LCD_SET_E1; \
+ LCD_DELAY_READ; \
+ status = LCD_READ; \
+ LCD_CLR_E1; \
+ LCD_SET_A0; \
+ LCD_CLR_RD; \
+ } while (status & LCDF_BUSY); \
+ LCD_DB_OUT; \
+ } while (0)
+
+#else /* CONFIG_LCD_WAIT */
+
+#define WAIT_LCD do {} while(0)
+
+#endif /* CONFIG_LCD_WAIT */
+
+
+/*!
+ * Raster buffer to draw into.
+ *
+ * Bits in the bitmap bytes have vertical orientation,
+ * as required by the LCD driver.
+ */
+DECLARE_WALL(wall_before_raster, WALL_SIZE)
+static uint8_t lcd_raster[LCD_WIDTH * ((LCD_HEIGHT + 7) / 8)];
+DECLARE_WALL(wall_after_raster, WALL_SIZE)
+
+/*! Default LCD bitmap */
+struct Bitmap lcd_bitmap;
+
+
+#ifdef CONFIG_LCD_SOFTINT_REFRESH
+
+/*! Timer for regular LCD refresh */
+static Timer *lcd_refresh_timer;
+
+#endif /* CONFIG_LCD_SOFTINT_REFRESH */
+
+
+/*
+static bool lcd_check(void)
+{
+ uint8_t status;
+ uint16_t retries = 32768;
+ PORTA = 0xFF;
+ DDRA = 0x00;
+ do {
+ cbi(PORTC, PCB_LCD_RS);
+ sbi(PORTC, PCB_LCD_RW);
+ sbi(PORTC, PCB_LCD_E);
+ --retries;
+ NOP;
+ status = PINA;
+ cbi(PORTC, PCB_LCD_E);
+ cbi(PORTC, PCB_LCD_RW);
+ } while ((status & LCDF_BUSY) && retries);
+
+ return (retries != 0);
+}
+*/
+
+
+static inline void lcd_cmd(uint8_t cmd, uint8_t chip)
+{
+ WAIT_LCD;
+
+ /* __ __
+ * A0 __\____________/__
+ *
+ * R/W __________________
+ * ______
+ * E1 _____/ \_____
+ *
+ * DATA --<============>--
+ */
+ LCD_WRITE(cmd);
+ //LCD_DB_OUT;
+ LCD_CLR_A0;
+ LCD_SET_E(chip);
+ LCD_DELAY_WRITE;
+ LCD_CLR_E(chip);
+ LCD_SET_A0;
+ //LCD_DB_IN;
+}
+
+
+static inline uint8_t lcd_read(uint8_t chip)
+{
+ uint8_t data;
+
+ WAIT_LCD;
+
+ /*!
+ * \code
+ * __________________
+ * A0 __/ \__
+ * ____________
+ * R/W __/ \__
+ * _______
+ * E1 _____/ \____
+ *
+ * DATA -------<=====>----
+ *
+ * \endcode
+ */
+ LCD_DB_IN;
+ //LCD_SET_A0;
+ LCD_SET_RD;
+ LCD_SET_E(chip);
+ LCD_DELAY_READ;
+ data = LCD_READ;
+ LCD_CLR_E(chip);
+ LCD_CLR_RD;
+ //LCD_CLR_A0;
+ LCD_DB_OUT;
+
+ return data;
+}
+
+
+static inline void lcd_write(uint8_t c, uint8_t chip)
+{
+ WAIT_LCD;
+
+ /*!
+ * \code
+ * __________________
+ * A0 ___/ \___
+ *
+ * R/W __________________
+ * ______
+ * E1 _____/ \_____
+ *
+ * DATA -<==============>-
+ *
+ * \endcode
+ */
+ LCD_WRITE(c);
+ //LCD_DB_OUT;
+ //LCD_SET_A0;
+ LCD_SET_E(chip);
+ LCD_DELAY_WRITE;
+ LCD_CLR_E(chip);
+ //LCD_CLR_A0;
+ //LCD_DB_IN;
+}
+
+
+/*!
+ * Set LCD contrast PWM.
+ */
+void lcd_setpwm(int duty)
+{
+ ASSERT(duty >= LCD_MIN_PWM);
+ ASSERT(duty <= LCD_MAX_PWM);
+
+ OCR3C = duty;
+}
+
+
+static void lcd_clear(void)
+{
+ uint8_t page, j;
+
+ for (page = 0; page < LCD_PAGES; ++page)
+ {
+ lcd_cmd(LCD_CMD_COLADDR | 0, LCDF_E1 | LCDF_E2);
+ lcd_cmd(LCD_CMD_PAGEADDR | page, LCDF_E1 | LCDF_E2);
+ for (j = 0; j < LCD_PAGESIZE; j++)
+ lcd_write(0, LCDF_E1 | LCDF_E2);
+ }
+}
+
+
+static void lcd_writeraster(const uint8_t *raster)
+{
+ uint8_t page, rows;
+ const uint8_t *right_raster;
+
+ CHECK_WALL(wall_before_raster);
+ CHECK_WALL(wall_after_raster);
+
+ for (page = 0; page < LCD_PAGES; ++page)
+ {
+ lcd_cmd(LCD_CMD_PAGEADDR | page, LCDF_E1 | LCDF_E2);
+ lcd_cmd(LCD_CMD_COLADDR | 0, LCDF_E1 | LCDF_E2);
+
+ /* Super optimized lamer loop */
+ right_raster = raster + LCD_PAGESIZE;
+ rows = LCD_PAGESIZE;
+ do
+ {
+ lcd_write(*raster++, LCDF_E1);
+ lcd_write(*right_raster++, LCDF_E2);
+ }
+ while (--rows);
+ raster = right_raster;
+ }
+}
+
+
+void lcd_blit_bitmap(Bitmap *bm)
+{
+ lcd_writeraster(bm->raster);
+}
+
+
+#ifdef CONFIG_LCD_SOFTINT_REFRESH
+
+static void lcd_refresh_softint(void)
+{
+ lcd_blit_bitmap(&lcd_bitmap);
+ timer_add(lcd_refresh_timer);
+}
+
+#endif /* CONFIG_LCD_SOFTINT_REFRESH */
+
+
+/*!
+ * Initialize LCD subsystem.
+ *
+ * \note The PWM used for LCD contrast is initialized in drv/pwm.c
+ * because it is the same PWM used for output attenuation.
+ */
+void lcd_init(void)
+{
+ // FIXME: interrupts are already disabled when we get here?!?
+ cpuflags_t flags;
+ IRQ_SAVE_DISABLE(flags);
+
+ PORTB |= BV(LCD_PB_A0);
+ DDRB |= BV(LCD_PB_A0);
+
+ PORTE &= ~(BV(LCD_PE_RW) | BV(LCD_PE_E1) | BV(LCD_PE_E2));
+ DDRE |= BV(LCD_PE_RW) | BV(LCD_PE_E1) | BV(LCD_PE_E2);
+
+/* LCD hw reset
+ LCD_RESET_PORT |= BV(LCD_RESET_BIT);
+ LCD_RESET_DDR |= BV(LCD_RESET_BIT);
+ LCD_DELAY_WRITE;
+ LCD_DELAY_WRITE;
+ LCD_RESET_PORT &= ~BV(LCD_RESET_BIT);
+ LCD_DELAY_WRITE;
+ LCD_DELAY_WRITE;
+ LCD_RESET_PORT |= BV(LCD_RESET_BIT);
+*/
+ /*
+ * Data bus is in output state most of the time:
+ * LCD r/w functions assume it is left in output state
+ */
+ LCD_DB_OUT;
+
+ // Wait for RST line to stabilize at Vcc.
+ IRQ_ENABLE;
+ timer_delay(20);
+ IRQ_SAVE_DISABLE(flags);
+
+ lcd_cmd(LCD_CMD_RESET, LCDF_E1 | LCDF_E2);
+ lcd_cmd(LCD_CMD_DISPLAY_ON, LCDF_E1 | LCDF_E2);
+ lcd_cmd(LCD_CMD_STARTLINE | 0, LCDF_E1 | LCDF_E2);
+
+ /* Initialize anti-corruption walls for raster */
+ INIT_WALL(wall_before_raster);
+ INIT_WALL(wall_after_raster);
+
+ IRQ_RESTORE(flags);
+
+ lcd_clear();
+ lcd_setpwm(LCD_DEF_PWM);
+
+ gfx_bitmapInit(&lcd_bitmap, lcd_raster, LCD_WIDTH, LCD_HEIGHT);
+ gfx_bitmapClear(&lcd_bitmap);
+
+#ifdef CONFIG_LCD_SOFTINT_REFRESH
+
+ /* Init IRQ driven LCD refresh */
+ lcd_refresh_timer = timer_new();
+ ASSERT(lcd_refresh_timer != NULL);
+ INITEVENT_INT(&lcd_refresh_timer->expire, (Hook)lcd_refresh_softint, 0);
+ lcd_refresh_timer->delay = LCD_REFRESH_INTERVAL;
+ timer_add(lcd_refresh_timer);
+
+#endif /* CONFIG_LCD_SOFTINT_REFRESH */
+}
--- /dev/null
+/*!
+ * \file
+ * <!--
+ * Copyright 2003, 2004, 2006 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 2001 Bernardo Innocenti <bernie@codewiz.org>
+ * This file is part of DevLib - See README.devlib for information.
+ * -->
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ * \author Stefano Fedrigo <aleph@develer.com>
+ *
+ * \brief Displaytech 32122A LCD driver
+ */
+
+/*#*
+ *#* $Log$
+ *#* Revision 1.1 2006/01/16 03:50:57 bernie
+ *#* Import into DevLib.
+ *#*
+ *#* Revision 1.13 2005/11/27 22:41:08 bernie
+ *#* Remove trailing whitespace.
+ *#*
+ *#* Revision 1.12 2004/08/29 21:46:11 bernie
+ *#* CVSSILENT: Mark CVS log blocks.
+ *#*
+ *#* Revision 1.11 2004/06/11 12:40:11 customer_pw
+ *#* Changes for new board_kf
+ *#*
+ *#* Revision 1.10 2004/03/24 15:37:03 bernie
+ *#* Remove Copyright messages from Doxygen output
+ *#*
+ *#* Revision 1.9 2004/02/26 18:48:52 aleph
+ *#* Remove generic setting function which live better in levels.c
+ *#*
+ *#* Revision 1.8 2004/02/11 11:14:35 aleph
+ *#* Adeguate lcd_setcontrast to new leveledit callback interface
+ *#*
+ *#* Revision 1.7 2004/02/10 21:45:13 aleph
+ *#* Values for contrast setting are logical ascending (1->10) instead of raw PWM (240->50)
+ *#*
+ *#* Revision 1.6 2004/02/09 15:52:09 aleph
+ *#* Add reasonable min and max level #define for contrast
+ *#*
+ *#* Revision 1.5 2004/01/13 00:04:10 aleph
+ *#* change lcd_clear() to static and minor var/define name enhancements
+ *#*
+ *#* Revision 1.4 2004/01/07 19:06:48 aleph
+ *#* Some LCD bus optmizations and add bitmap rendering funcs
+ *#*
+ *#* Revision 1.3 2003/12/22 15:27:26 aleph
+ *#* Add E2 chip select and some code cosmetic changes
+ *#*
+ *#* Revision 1.2 2003/12/19 00:20:17 aleph
+ *#* Add contrast PWM
+ *#*
+ *#* Revision 1.1 2003/12/08 03:46:42 aleph
+ *#* Add lcd driver
+ *#*
+ *#*/
+
+#ifndef LCD_GFX_H
+#define LCD_GFX_H
+
+/* Predefined LCD PWM contrast values */
+#define LCD_DEF_PWM 145
+#define LCD_MAX_PWM 505
+#define LCD_MIN_PWM 130
+
+/* Display bitmap dims */
+#define LCD_WIDTH 122
+#define LCD_HEIGHT 32
+
+/* fwd decl */
+struct Bitmap;
+
+extern struct Bitmap lcd_bitmap;
+
+void lcd_init(void);
+void lcd_setpwm(int duty);
+void lcd_blit_bitmap(struct Bitmap *bm);
+
+#endif // LCD_GFX_H
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