--- /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 HX8347 low-level hardware macros for Atmel SAM3X-EK board.
+ *
+ * The LCD controller is connected to the cpu static memory controller.
+ * LCD has 16 data lines and usual RS/WR/RD lines. The data lines
+ * are connected to the SMC data bus (D0-15), while the SCM address bus
+ * (A1 only) is used to drive the RS pin. WR/RD are connected to SMC's
+ * NWE and NRD respectively.
+ *
+ * \author Stefano Fedrigo <aleph@develer.com>
+ */
+
+#ifndef HW_HX8347_H
+#define HW_HX8347_H
+
+#include "cfg/macros.h"
+#include <io/sam3.h>
+
+
+/*
+ * LCD I/O pins/ports and peripherals
+ */
+#define LCD_DATABUS_PINS (0xFFFF << 2)
+#define LCD_DATABUS_PORT PIOC_BASE
+#define LCD_DATABUS_PERIPH PIO_PERIPH_A
+
+#define LCD_NRD_PIN BV(29)
+#define LCD_NRD_PORT PIOA_BASE
+#define LCD_NRD_PERIPH PIO_PERIPH_B
+
+#define LCD_NWE_PIN BV(18)
+#define LCD_NWE_PORT PIOC_BASE
+#define LCD_NWE_PERIPH PIO_PERIPH_A
+
+#define LCD_NCS2_PIN BV(24)
+#define LCD_NCS2_PORT PIOB_BASE
+#define LCD_NCS2_PERIPH PIO_PERIPH_B
+
+#define LCD_RS_PIN BV(22)
+#define LCD_RS_PORT PIOC_BASE
+#define LCD_RS_PERIPH PIO_PERIPH_A
+
+
+// How many cpu clocks per nanosecond.
+#define CLOCKS_PER_NS(ns) ((uint32_t)((ns * (CPU_FREQ/1000000)) / 1000) + 1)
+
+
+// LCD Base Address, chip select 2
+#define LCD_BASE 0x62000000
+
+// LCD index register address
+#define LCD_IR (*(uint16_t *)(LCD_BASE))
+
+// LCD data address (A1 drives RS signal)
+#define LCD_D (*(uint16_t *)(LCD_BASE + 2))
+
+/**
+ * Send a command to LCD controller.
+ */
+INLINE void hx8347_cmd(uint8_t cmd)
+{
+ LCD_IR = cmd;
+}
+
+/**
+ * Send data to LCD controller.
+ */
+INLINE void hx8347_write(uint16_t data)
+{
+ LCD_D = data;
+}
+
+/**
+ * Read data from LCD controller.
+ */
+INLINE uint16_t hx8347_read(void)
+{
+ return LCD_D;
+}
+
+/**
+ * Bus initialization: on SAM3X-EK the display is wired
+ * on the static memory controller, chip select 2.
+ */
+INLINE void hx8347_busInit(void)
+{
+ // Configure pins: disable PIO...
+ HWREG(LCD_DATABUS_PORT + PIO_PDR_OFF) = LCD_DATABUS_PINS;
+ HWREG(LCD_NRD_PORT + PIO_PDR_OFF) = LCD_NRD_PIN;
+ HWREG(LCD_NWE_PORT + PIO_PDR_OFF) = LCD_NWE_PIN;
+ HWREG(LCD_NCS2_PORT + PIO_PDR_OFF) = LCD_NCS2_PIN;
+ HWREG(LCD_RS_PORT + PIO_PDR_OFF) = LCD_RS_PIN;
+
+ // ... enable pull-up...
+ HWREG(LCD_DATABUS_PORT + PIO_PUER_OFF) = LCD_DATABUS_PINS;
+ HWREG(LCD_NRD_PORT + PIO_PUER_OFF) = LCD_NRD_PIN;
+ HWREG(LCD_NWE_PORT + PIO_PUER_OFF) = LCD_NWE_PIN;
+ HWREG(LCD_NCS2_PORT + PIO_PUER_OFF) = LCD_NCS2_PIN;
+ HWREG(LCD_RS_PORT + PIO_PUER_OFF) = LCD_RS_PIN;
+
+ // ... and select appropriate peripheral.
+ PIO_PERIPH_SEL(LCD_DATABUS_PORT, LCD_DATABUS_PINS, LCD_DATABUS_PERIPH);
+ PIO_PERIPH_SEL(LCD_NRD_PORT, LCD_NRD_PIN, LCD_NRD_PERIPH);
+ PIO_PERIPH_SEL(LCD_NWE_PORT, LCD_NWE_PIN, LCD_NWE_PERIPH);
+ PIO_PERIPH_SEL(LCD_NCS2_PORT, LCD_NCS2_PIN, LCD_NCS2_PERIPH);
+ PIO_PERIPH_SEL(LCD_RS_PORT, LCD_RS_PIN, LCD_RS_PERIPH);
+
+ // Enable peripheral clock
+ PMC_PCER = SMC_SDRAMC_ID;
+
+ // Static memory controller configuration
+ SMC_SETUP2 =
+ SMC_SETUP_NWE_SETUP(CLOCKS_PER_NS(10)) |
+ SMC_SETUP_NCS_WR_SETUP(CLOCKS_PER_NS(10)) |
+ SMC_SETUP_NRD_SETUP(CLOCKS_PER_NS(90)) |
+ SMC_SETUP_NCS_RD_SETUP(CLOCKS_PER_NS(90));
+
+ SMC_PULSE2 =
+ SMC_PULSE_NWE_PULSE(CLOCKS_PER_NS(35)) |
+ SMC_PULSE_NCS_WR_PULSE(CLOCKS_PER_NS(35)) |
+ SMC_PULSE_NRD_PULSE(CLOCKS_PER_NS(355)) |
+ SMC_PULSE_NCS_RD_PULSE(CLOCKS_PER_NS(355));
+
+ SMC_CYCLE2 =
+ SMC_CYCLE_NWE_CYCLE(CLOCKS_PER_NS(100)) |
+ SMC_CYCLE_NRD_CYCLE(CLOCKS_PER_NS(460));
+
+ SMC_MODE2 =
+ SMC_MODE_WRITE_MODE | SMC_MODE_READ_MODE | SMC_MODE_DBW;
+}
+
+#endif /* HW_HX8347_H */
projects / bertos.git / blobdiff