Add basic LCD support
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1517 42af7a65-404d-4744-a932-0658087f49c3
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@ -59,7 +59,9 @@
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# stack in bytes. If not defined, the user task stacks will be
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# used during interrupt handling.
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# CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
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#
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# CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to skp16c26.
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# CONFIG_ARCH_LCD - Configure LCD. Unique to skp16c26.
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CONFIG_ARCH=sh
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CONFIG_ARCH_SH=y
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CONFIG_ARCH_CHIP=m16c
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@ -74,6 +76,8 @@ CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
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CONFIG_BOARD_LOOPSPERMSEC=16945
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CONFIG_ARCH_INTERRUPTSTACK=128
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CONFIG_ARCH_STACKDUMP=y
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CONFIG_ARCH_LEDS=n
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CONFIG_ARCH_LCD=y
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#
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# M16C specific device driver settings
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@ -39,7 +39,7 @@ CFLAGS += -I$(TOPDIR)/sched
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ASRCS =
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AOBJS = $(ASRCS:.S=$(OBJEXT))
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CSRCS = up_leds.c up_buttons.c up_lcdconsole.c
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CSRCS = up_leds.c up_buttons.c up_lcd.c up_lcdconsole.c
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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226
configs/skp16c26/src/up_lcd.c
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226
configs/skp16c26/src/up_lcd.c
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@ -0,0 +1,226 @@
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/************************************************************************************
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* configs/scp16c26/src/up_lcd.c
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include "up_arch.h"
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#include "up_internal.h"
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#include "chip.h"
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#ifdef CONFIG_ARCH_LCD
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/************************************************************************************
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* Definitions
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************************************************************************************/
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/* LCD commands *********************************************************************/
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#define LCD_CLEAR 0x01 /* Clear LCD display and home cursor */
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#define LCD_HOME_L1 0x80 /* move cursor to line 1 */
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#define LCD_HOME_L2 0xc0 /* move cursor to line 2 */
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#define CURSOR_MODE_DEC 0x04 /* Cursor auto decrement after R/W */
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#define CURSOR_MODE_INC 0x06 /* Cursor auto increment after R/W */
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#define FUNCTION_SET 0x28 /* Setup, 4 bits,2 lines, 5X7 */
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#define LCD_CURSOR_ON 0x0e /* Display ON with Cursor */
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#define LCD_CURSOR_OFF 0x0c /* Display ON with Cursor off */
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#define LCD_CURSOR_BLINK 0x0d /* Display on with blinking cursor */
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#define LCD_CURSOR_LEFT 0x10 /* Move Cursor Left One Position */
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#define LCD_CURSOR_RIGHT 0x14 /* Move Cursor Right One Position */
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/************************************************************************************
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* Private Data
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************************************************************************************/
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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/************************************************************************************
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* Name: up_lcddelay
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************************************************************************************/
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static void up_lcddelay(uint16 count)
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{
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uint32 counter = (uint16)count << 8;
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while(counter--)
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{
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asm("\tnop\n\tnop\n\tnop\n" : :); /* 3 NOPs */
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}
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}
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/************************************************************************************
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* Name: up_setrs
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************************************************************************************/
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static inline void up_setrs(boolean data)
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{
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/* Set/clear bit 1 of port 6 */
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register ubyte regval = getreg8(M16C_P6);
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if (data)
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{
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regval |= (1 << 0); /* High = data */
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}
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else
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{
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regval &= ~(1 << 0); /* Low = control */
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}
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putreg8(regval, M16C_P6);
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}
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/************************************************************************************
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* Name: up_seten
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************************************************************************************/
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static inline void up_seten(void)
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{
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/* Set bit 1 of port 6 */
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register ubyte regval = getreg8(M16C_P6);
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regval = (1 << 1);
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putreg8(regval, M16C_P6);
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}
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/************************************************************************************
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* Name: up_clren
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************************************************************************************/
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static inline void up_clren(void)
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{
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/* Clear bit 1 of port 6 */
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register ubyte regval = getreg8(M16C_P6);
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regval &= ~(1 << 1);
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putreg8(regval, M16C_P6);
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}
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/************************************************************************************
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* Name: up_enpluse
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************************************************************************************/
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static inline void up_enpulse(boolean data)
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{
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up_seten(); /* EN enable chip (HIGH) */
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up_lcddelay(0); /* Short delay */
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up_clren(); /* Latch data by setting EN low */
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up_lcddelay(0); /* Short delay for data writes */
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if (!data) up_lcddelay(0); /* Longer delay for control writes */
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}
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/************************************************************************************
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* Name: up_lcdwrite
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************************************************************************************/
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void up_lcdwrite(boolean data, ubyte ch)
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{
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up_setrs(data); /* Set RS appropriately */
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/* Write upper nibble first. Only the lower 4 bits of P9 are valid. The upper four
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* bits are reserved and must be zero.
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*/
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putreg8(ch >> 4, M16C_P9);
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up_enpulse(data);
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/* Write lower nibble second */
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putreg8(ch & 0x0f, M16C_P9);
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up_enpulse(data);
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}
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: up_lcdinit
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************************************************************************************/
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void up_lcdinit(void)
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{
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ubyte regval;
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/* Enable writing to PD9 by selecting bit 2 in the protection register */
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regval = getreg8(M16C_PRCR);
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regval |= (1 << 2);
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putreg8(regval, M16C_PRCR);
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/* We can't read PD9, so we can't OR the values in */
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putreg8(0x0f, M16C_PD9);
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/* Set EN (port 6 bit 1) and Set RS (port 6 bit 0) as outputs */
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regval = getreg8(M16C_P6);
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regval |= (1 << 1) | (1 << 0);
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putreg8(regval, M16C_P6);
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regval = getreg8(M16C_PD6);
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regval |= (1 << 1) | (1 << 0);
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putreg8(regval, M16C_PD6);
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/* Set EN low */
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up_clren();
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/* Write the reset sequence */
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up_lcdwrite(FALSE, 0x33);
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up_lcddelay(20);
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up_lcdwrite(FALSE, 0x32);
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up_lcddelay(20);
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up_lcdwrite(FALSE, FUNCTION_SET); /* reset sequence */
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up_lcdwrite(FALSE, FUNCTION_SET);
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up_lcdwrite(FALSE, LCD_CURSOR_OFF);
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up_lcdwrite(FALSE, LCD_CLEAR);
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up_lcdwrite(FALSE, LCD_HOME_L1);
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}
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/************************************************************************************
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* Name: up_lcdputc
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************************************************************************************/
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void up_lcdputc(char ch)
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{
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up_lcdwrite(TRUE, ch);
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}
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#endif /* CONFIG_ARCH_LCD */
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@ -56,7 +56,7 @@
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# undef HAVE_SERIALCONSOLE
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#endif
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#ifndef HAVE_SERIALCONSOLE
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#if !defined(HAVE_SERIALCONSOLE) && defined(CONFIG_ARCH_LCD)
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/************************************************************************************
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* Definitions
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@ -71,23 +71,9 @@
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************************************************************************************/
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/************************************************************************************
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* Public Funtions
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: up_lowsetup
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*
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* Description:
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* This performs basic initialization of the hardware used for the console.
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* Its purpose is to get the console output availabe as soon as possible.
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*
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************************************************************************************/
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void up_lowsetup(void)
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{
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# warning "To be provided"
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}
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/************************************************************************************
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* Name: up_earlyconsoleinit
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*
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@ -98,10 +84,11 @@ void up_lowsetup(void)
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*
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************************************************************************************/
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#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DEV_LOWCONSOLE)
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#ifdef CONFIG_USE_EARLYSERIALINIT
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# warning "You probably need to define CONFIG_ARCH_LOWCONSOLE"
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void up_earlyconsoleinit(void)
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{
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/* In this context, up_earlyconsoleinit does not need to do anything. */
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/* There is probably a problem if we are here */
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}
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#endif
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@ -114,10 +101,13 @@ void up_earlyconsoleinit(void)
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*
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************************************************************************************/
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#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DEV_LOWCONSOLE)
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#if CONFIG_USE_SERIALDRIVER
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# warning "You probably need to define CONFIG_ARCH_LOWCONSOLE"
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void up_consoleinit(void)
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{
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/* In this context, up_earlyconsoleinit does not need to do anything. */
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/* There is probably a problem if we are here */
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lowconsole_init();
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}
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#endif
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@ -131,7 +121,7 @@ void up_consoleinit(void)
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void up_lowputc(char ch)
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{
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# warning "To be provided"
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up_lcdputc(ch);
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}
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/************************************************************************************
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@ -144,10 +134,8 @@ void up_lowputc(char ch)
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int up_putc(int ch)
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{
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/* Same as up_lowputc in this context */
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up_lowputc(ch);
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up_lcdputc(ch);
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return ch;
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}
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#endif /* HAVE_SERIALCONSOLE */
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#endif /* !HAVE_SERIALCONSOLE && CONFIG_ARCH_LCD */
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@ -54,7 +54,7 @@
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************************************************************************************/
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/************************************************************************************
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* Public Funtions
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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