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bertos/drv/lcd_rit128x96.c

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+/**
+ * \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 OLED-RIT-128x96 (P14201) graphic display driver
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ */
+
+#include "lcd_rit128x96.h"
+
+#include "hw/hw_rit128x96.h"
+
+#include <cfg/debug.h>
+#include <cfg/macros.h>
+
+
+/*
+ * Hard-coded command initialization sequence.
+ *
+ * NOTE: the first byte is the size of the command.
+ */
+static const uint8_t init_cmd[] =
+{
+	/* Unlock commands */
+	3, 0xfd, 0x12, 0xe3,
+	/* Display off */
+	2, 0xae, 0xe3,
+	/* Icon off */
+	3, 0x94, 0, 0xe3,
+	/* Multiplex ratio */
+	3, 0xa8, 95, 0xe3,
+	/* Contrast */
+	3, 0x81, 0xb7, 0xe3,
+	/* Pre-charge current */
+	3, 0x82, 0x3f, 0xe3,
+	/* Display Re-map */
+	3, 0xa0, 0x52, 0xe3,
+	/* Display Start Line */
+	3, 0xa1, 0, 0xe3,
+	/* Display Offset */
+	3, 0xa2, 0x00, 0xe3,
+	/* Display Mode Normal */
+	2, 0xa4, 0xe3,
+	/* Phase Length */
+	3, 0xb1, 0x11, 0xe3,
+	/* Frame frequency */
+	3, 0xb2, 0x23, 0xe3,
+	/* Front Clock Divider */
+	3, 0xb3, 0xe2, 0xe3,
+	/* Set gray scale table */
+	17, 0xb8, 1, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 19, 22, 26, 30, 0xe3,
+	/* Second pre-charge period */
+	3, 0xbb, 0x01, 0xe3,
+	/* Pre-charge voltage */
+	3, 0xbc, 0x3f, 0xe3,
+	/* Display ON */
+	2, 0xaf, 0xe3,
+};
+
+/*
+ * Hard-coded command shutdown sequence.
+ */
+static const uint8_t exit_cmd[] =
+{
+	/* Display OFF */
+	0xae, 0xe3
+};
+
+/*
+ * Hard-coded horizontal increment command.
+ */
+static const uint8_t horizontal_inc[] =
+{
+	0xa0, 0x52
+};
+
+/**
+ * Write a sequence of data bytes to the LCD controller
+ */
+static void lcd_dataWrite(const uint8_t *buf, size_t count)
+{
+	while (count--)
+		LCD_WRITE(*buf++);
+}
+
+/* Turn on the OLED display */
+void rit128x96_on(void)
+{
+	unsigned int i;
+
+	/* Loop through the SSD1329 controller initialization sequence */
+	LCD_SET_COMMAND();
+	for (i = 0; i < sizeof(init_cmd); i += init_cmd[i] + 1)
+		lcd_dataWrite(init_cmd + i + 1, init_cmd[i] - 1);
+}
+
+/* Turn off the OLED display */
+void rit128x96_off(void)
+{
+	LCD_SET_COMMAND();
+	lcd_dataWrite(exit_cmd, sizeof(exit_cmd));
+}
+
+static void lcd_start_blit(uint8_t x, uint8_t y, uint8_t width, uint8_t height)
+{
+	uint8_t buffer[3];
+
+	ASSERT((x + width) <= LCD_WIDTH);
+	ASSERT((y + height) <= LCD_HEIGHT);
+
+	/* Enter command mode */
+	LCD_SET_COMMAND();
+
+	buffer[0] = 0x15;
+	buffer[1] = x / 2;
+	buffer[2] = (x + width - 2) / 2;
+	lcd_dataWrite(buffer, 3);
+
+	buffer[0] = 0x75;
+	buffer[1] = y;
+	buffer[2] = y + height - 1;
+	lcd_dataWrite(buffer, 3);
+	lcd_dataWrite((const uint8_t *)&horizontal_inc, sizeof(horizontal_inc));
+}
+
+/* Refresh a raw image on screen */
+void rit128x96_blitRaw(const uint8_t *data,
+		uint8_t x, uint8_t y, uint8_t width, uint8_t height)
+{
+	lcd_start_blit(x, y, width, height);
+	/*
+	 * Enter data mode and send the encoded image data to the OLED display,
+	 * over the SSI bus.
+	 */
+	LCD_SET_DATA();
+	while (height--)
+	{
+		/* Write an entire row at once */
+		lcd_dataWrite(data, width / 2);
+		data += width / 2;
+	}
+}
+
+/* Refresh a bitmap on screen */
+void rit128x96_blitBitmap(const Bitmap *bm)
+{
+	uint8_t lcd_row[bm->width / 2];
+	uint8_t mask;
+	int i, l;
+
+	lcd_start_blit(0, 0, bm->width, bm->height);
+	/*
+	 * Enter data mode and send the encoded image data to the OLED display,
+	 * over the SSI bus.
+	 */
+	LCD_SET_DATA();
+	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_row[i / 2] |= i & 1 ? 0x0f : 0xf0;
+				else
+					lcd_row[i / 2] &= i & 1 ? 0xf0 : 0x0f;
+			}
+			/* Write an entire row at once */
+			lcd_dataWrite(lcd_row, sizeof(lcd_row));
+		}
+	}
+}
+
+/* Initialize the OLED display */
+void rit128x96_init(void)
+{
+	/* Initialize the communication bus */
+	lcd_rit128x96_hw_bus_init();
+
+	/* Turn on the OLED display */
+	rit128x96_on();
+}