--- /dev/null
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2003, 2004, 2005, 2006 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 2001 Bernie Innocenti <bernie@codewiz.org>
+ *
+ * -->
+ *
+ * \brief Displaytech 32122A LCD driver
+ *
+ * \author Bernie Innocenti <bernie@codewiz.org>
+ * \author Stefano Fedrigo <aleph@develer.com>
+ *
+ */
+
+
+#include "lcd_32122a.h"
+
+#include "hw/hw_lcd_32122a.h"
+
+#include "cfg/cfg_lcd_32122a.h"
+
+#include <cfg/macros.h> /* BV() */
+#include <cfg/debug.h>
+#include <cfg/module.h>
+
+#include <gfx/gfx.h>
+
+#include <drv/timer.h>
+#include <drv/pwm.h>
+
+#include <cpu/irq.h>
+#include <cpu/types.h>
+
+
+/** Number of LCD pages */
+#define LCD_PAGES 4
+
+/** Width of an LCD page */
+#define LCD_PAGESIZE (LCD_WIDTH / 2)
+
+/**
+ * \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)
+
+#if 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.
+ */
+static uint8_t lcd_raster[RAST_SIZE(LCD_WIDTH, LCD_HEIGHT)];
+
+/** Default LCD bitmap */
+struct Bitmap lcd_bitmap;
+
+
+#if CONFIG_LCD_SOFTINT_REFRESH
+
+/** Timer for regular LCD refresh */
+static Timer lcd_refresh_timer;
+
+#endif /* CONFIG_LCD_SOFTINT_REFRESH */
+
+
+INLINE void lcd_32122_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;
+
+}
+
+
+INLINE uint8_t lcd_32122_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;
+}
+
+INLINE void lcd_32122_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;
+}
+
+static void lcd_32122_clear(void)
+{
+ uint8_t page, j;
+
+ for (page = 0; page < LCD_PAGES; ++page)
+ {
+ lcd_32122_cmd(LCD_CMD_COLADDR, LCDF_E1 | LCDF_E2);
+ lcd_32122_cmd(LCD_CMD_PAGEADDR | page, LCDF_E1 | LCDF_E2);
+ for (j = 0; j < LCD_PAGESIZE; j++)
+ lcd_32122_write(0, LCDF_E1 | LCDF_E2);
+ }
+}
+
+
+static void lcd_32122_writeRaster(const uint8_t *raster)
+{
+ uint8_t page, rows;
+ const uint8_t *right_raster;
+
+ for (page = 0; page < LCD_PAGES; ++page)
+ {
+ lcd_32122_cmd(LCD_CMD_PAGEADDR | page, LCDF_E1 | LCDF_E2);
+ lcd_32122_cmd(LCD_CMD_COLADDR | 0, LCDF_E1 | LCDF_E2);
+
+ /* Super optimized lamer loop */
+ right_raster = raster + LCD_PAGESIZE;
+ rows = LCD_PAGESIZE;
+ do
+ {
+ lcd_32122_write(*raster++, LCDF_E1);
+ lcd_32122_write(*right_raster++, LCDF_E2);
+ }
+ while (--rows);
+ raster = right_raster;
+ }
+}
+
+#if CONFIG_LCD_SOFTINT_REFRESH
+
+static void lcd_32122_refreshSoftint(void)
+{
+ lcd_32122_blitBitmap(&lcd_bitmap);
+ timer_setDelay(&lcd_refresh_timer, ms_to_ticks(CONFIG_LCD_REFRESH));
+ timer_add(&lcd_refresh_timer);
+}
+
+#endif /* CONFIG_LCD_SOFTINT_REFRESH */
+
+/**
+ * Set LCD contrast PWM.
+ */
+void lcd_32122_setPwm(int duty)
+{
+ ASSERT(duty >= LCD_MIN_PWM);
+ ASSERT(duty <= LCD_MAX_PWM);
+
+ pwm_setDuty(LCD_PWM_CH, duty);
+ pwm_enable(LCD_PWM_CH, true);
+}
+
+/**
+ * Update the LCD display with data from the provided bitmap.
+ */
+void lcd_32122_blitBitmap(Bitmap *bm)
+{
+ lcd_32122_writeRaster(bm->raster);
+}
+
+
+/**
+ * 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_32122_init(void)
+{
+ MOD_CHECK(timer);
+
+ pwm_init();
+
+ lcd_32122a_hw_bus_init();
+ LCD_32122_RESET();
+
+ lcd_32122_cmd(LCD_CMD_RESET, LCDF_E1 | LCDF_E2);
+ lcd_32122_cmd(LCD_CMD_DISPLAY_ON, LCDF_E1 | LCDF_E2);
+ lcd_32122_cmd(LCD_CMD_STARTLINE | 0, LCDF_E1 | LCDF_E2);
+
+
+ lcd_32122_clear();
+ lcd_32122_setPwm(LCD_DEF_PWM);
+
+ gfx_bitmapInit(&lcd_bitmap, lcd_raster, LCD_WIDTH, LCD_HEIGHT); gfx_bitmapClear(&lcd_bitmap);
+
+#if CONFIG_LCD_SOFTINT_REFRESH
+ /* Init IRQ driven LCD refresh */
+ timer_setSoftint(&lcd_refresh_timer, (Hook)lcd_32122_refreshSoftint, 0);
+ timer_setDelay(&lcd_refresh_timer, ms_to_ticks(CONFIG_LCD_REFRESH));
+ timer_add(&lcd_refresh_timer);
+#endif /* CONFIG_LCD_SOFTINT_REFRESH */
+
+}
+
projects / bertos.git / blobdiff