--- /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 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief ILI9225B 176x220 graphic driver
+ *
+ * \author Stefano Fedrigo <aleph@develer.com>
+ *
+ * Display initialization sequence is based on Atmel's softpack library
+ * implementation, see license below.
+ */
+
+/* ----------------------------------------------------------------------------
+ * ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2010, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+#include "lcd_ili9225.h"
+
+#include "hw/hw_ili9225.h"
+
+#include <drv/timer.h>
+#include <drv/ser.h>
+#include <io/kfile.h>
+
+
+static struct Serial *spi;
+
+
+struct lcd_ili9225_reg
+{
+ uint8_t cmd; // Register index, if 0xFF wait for value ms
+ uint16_t data; // Register value
+};
+
+static const struct lcd_ili9225_reg init_seq[] =
+{
+ {0x01, 0x011c}, // Set SS, SM, GS and NL bits
+ {0x02, 0x0100}, // Set 1 line inversion
+ {0x03, 0x1030}, // Entry Mode set GRAM write direction and BGR=1
+ {0x08, 0x0808}, // Set BP and FP
+ {0x0C, 0x0001}, // RGB Input Interface Control: 16-bit RGB interface
+ {0x0F, 0x0A01}, // Set frame rate: 83Hz
+ {0x20, LCD_WIDTH}, // Set GRAM Address
+ {0x21, LCD_HEIGHT}, // Set GRAM Address
+
+ /* power on sequence */
+ {0x10, 0x0A00}, // Set asp DSTB,STB
+ {0x11, 0x1038}, // SET APON PON AON VCI1EN VC
+ {0xFF, 50}, // Wait 50 ms
+
+ {0x12, 0x1121}, // Internal reference voltage = VCI
+ {0x13, 0x06CE}, // Set GVDD
+ {0x14, 0x676F}, // Set VCOMH/VCOML voltage
+
+ // Set gram area
+ {0x30, 0x0000},
+ {0x31, 0x00DB},
+ {0x32, 0x0000},
+ {0x33, 0x0000},
+ {0x34, 0x00DB},
+ {0x35, 0x0000},
+ {0x36, LCD_WIDTH},
+ {0x37, 0x0000},
+ {0x38, LCD_HEIGHT},
+ {0x39, 0x0000},
+
+ // Set gamma curve
+ {0x50, 0x0000},
+ {0x51, 0x060A},
+ {0x52, 0x0D0A},
+ {0x53, 0x0303},
+ {0x54, 0x0A0D},
+ {0x55, 0x0A06},
+ {0x56, 0x0000},
+ {0x57, 0x0303},
+ {0x58, 0x0000},
+ {0x59, 0x0000},
+};
+
+static void lcd_cmd(uint8_t cmd)
+{
+ LCD_CS_LOW();
+ LCD_RS_LOW();
+ kfile_write(&spi->fd, &cmd, sizeof(cmd));
+}
+
+static void lcd_data(uint16_t data)
+{
+ char bytes[2];
+ bytes[0] = data >> 8;
+ bytes[1] = data & 0xFF;
+
+ kfile_flush(&spi->fd);
+ LCD_RS_HIGH();
+ kfile_write(&spi->fd, bytes, 2);
+ kfile_flush(&spi->fd);
+ LCD_CS_HIGH();
+}
+
+static void lcd_regWrite(uint8_t reg, uint16_t data)
+{
+ lcd_cmd(reg);
+ lcd_data(data);
+}
+
+static void lcd_startBlit(uint8_t x, uint8_t y, uint8_t width, uint8_t height)
+{
+ ASSERT((x + width) <= LCD_WIDTH);
+ ASSERT((y + height) <= LCD_HEIGHT);
+
+ lcd_regWrite(0x36, x + width);
+ lcd_regWrite(0x37, x);
+ lcd_regWrite(0x38, y + height);
+ lcd_regWrite(0x39, y);
+
+ lcd_regWrite(0x20, x);
+ lcd_regWrite(0x21, y);
+}
+
+/*
+ * Refresh a raw image on screen
+ */
+void lcd_ili9225_blitRaw(UNUSED_ARG(const uint8_t *, data),
+ uint8_t x, uint8_t y, uint8_t width, uint8_t height)
+{
+ lcd_startBlit(x, y, width, height);
+ // TODO
+}
+
+/*
+ * Refresh a bitmap on screen
+ */
+void lcd_ili9225_blitBitmap(const Bitmap *bm)
+{
+ //uint16_t lcd_row[bm->width];
+ uint8_t mask;
+ int i, l, r;
+
+ lcd_startBlit(0, 0, bm->width, bm->height);
+
+ for (l = 0; l < bm->height / 8; l++)
+ {
+ for (mask = 1; mask; mask <<= 1)
+ {
+ for (i = 0; i < bm->width; i++)
+ {
+ if (bm->raster[l * bm->width + i] & mask)
+ lcd_regWrite(0x22, 0xffff);
+ else
+ lcd_regWrite(0x22, 0x0000);
+ }
+ }
+ }
+
+ for (r = 0, mask = 1; r < bm->height % 8; r++, mask <<= 1)
+ {
+ for (i = 0; i < bm->width; i++)
+ {
+ if (bm->raster[l * bm->width + i] & mask)
+ lcd_regWrite(0x22, 0xffff);
+ else
+ lcd_regWrite(0x22, 0x0000);
+ }
+ }
+}
+
+/**
+ * Turn off display.
+ */
+void lcd_ili9225_off(void)
+{
+ lcd_regWrite(0x07, 0x0000);
+}
+
+/**
+ * Turn on display.
+ */
+void lcd_ili9225_on(void)
+{
+ lcd_regWrite(0x07, 0x1017);
+}
+
+/**
+ * Reset display.
+ */
+static void lcd_reset(void)
+{
+ LCD_RESET_LOW();
+ timer_delay(20);
+ LCD_RESET_HIGH();
+ timer_delay(50);
+}
+
+/**
+ * Set display backlight intensity.
+ */
+void lcd_ili9225_backlight(unsigned level)
+{
+ unsigned i;
+
+ if (level > LCD_BACKLIGHT_MAX)
+ level = LCD_BACKLIGHT_MAX;
+
+ // Switch off backlight
+ LCD_BACKLIGHT_LOW();
+ timer_delay(1);
+
+ // Set new level
+ for (i = 0; i <= level; i++)
+ {
+ LCD_BACKLIGHT_LOW();
+ LCD_BACKLIGHT_LOW();
+ LCD_BACKLIGHT_LOW();
+
+ LCD_BACKLIGHT_HIGH();
+ LCD_BACKLIGHT_HIGH();
+ LCD_BACKLIGHT_HIGH();
+ }
+}
+
+/**
+ * Display initialization.
+ */
+void lcd_ili9225_init(struct Serial *_spi)
+{
+ unsigned i;
+
+ ASSERT(_spi);
+ spi = _spi;
+ lcd_ili9225_hw_bus_init();
+
+ lcd_reset();
+ lcd_ili9225_off();
+
+ for (i = 0; i < countof(init_seq); i++)
+ {
+ if (init_seq[i].cmd != 0xFF)
+ lcd_regWrite(init_seq[i].cmd, init_seq[i].data);
+ else
+ timer_delay(init_seq[i].data);
+ }
+
+ lcd_ili9225_on();
+}
projects / bertos.git / blobdiff