1080 lines
30 KiB
C
1080 lines
30 KiB
C
/****************************************************************************
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* drivers/lcd/st7565.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* Reference: "Product Specification, OEL Display Module, ST7567", Univision
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* Technology Inc., SAS1-6020-B, January 3, 2008.
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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 <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/lcd/lcd.h>
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#include <nuttx/lcd/st7565.h>
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#include "st7565.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* ST7565 Configuration Settings:
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*
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* CONFIG_ST7565_NINTERFACES - Specifies the number of physical
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* ST7565 devices that will be supported. NOTE: At present, this
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* must be undefined or defined to be 1.
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* CONFIG_LCD_ST7565DEBUG - Enable detailed ST7565 debst7565 output
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* (CONFIG_DEBUG_FEATURES and CONFIG_VERBOSE must also be enabled).
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*
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* Required LCD driver settings:
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* CONFIG_LCD_ST7565 - Enable ST7565 support
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* CONFIG_LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be
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* accepted.
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*
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*/
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/* Verify that all configuration requirements have been met */
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/* CONFIG_ST7565_NINTERFACES determines the number of physical interfaces
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* that will be supported.
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*/
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#ifndef CONFIG_ST7565_NINTERFACES
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# define CONFIG_ST7565_NINTERFACES 1
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#endif
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#if CONFIG_ST7565_NINTERFACES != 1
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# warning "Only a single ST7565 interface is supported"
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# undef CONFIG_ST7565_NINTERFACES
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# define CONFIG_ST7565_NINTERFACES 1
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#endif
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/* Verbose debst7565 must also be enabled to use the extra OLED debst7565 */
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#ifndef CONFIG_DEBUG_FEATURES
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# undef CONFIG_DEBUG_INFO
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# undef CONFIG_DEBUG_GRAPHICS
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#endif
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#ifndef CONFIG_DEBUG_INFO
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# undef CONFIG_LCD_ST7565DEBUG
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#endif
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/* Check contrast selection */
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#ifndef CONFIG_LCD_MAXCONTRAST
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# define CONFIG_LCD_MAXCONTRAST 255
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#endif
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#if CONFIG_LCD_MAXCONTRAST <= 0 || CONFIG_LCD_MAXCONTRAST > 255
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# error "CONFIG_LCD_MAXCONTRAST exceeds supported maximum"
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#endif
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#if CONFIG_LCD_MAXCONTRAST < 255
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# warning "Optimal setting of CONFIG_LCD_MAXCONTRAST is 255"
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#endif
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/* Color Properties *********************************************************/
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/* The ST7565 display controller can handle a resolution of 128x64. */
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/* Display Resolution */
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#ifdef CONFIG_ST7565_XRES
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# define ST7565_XRES CONFIG_ST7565_XRES
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#else
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# define ST7565_XRES 128
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#endif
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#ifdef CONFIG_ST7565_YRES
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# define ST7565_YRES CONFIG_ST7565_YRES
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#else
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# define ST7565_YRES 64
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#endif
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/* Color depth and format */
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#define ST7565_BPP 1
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#define ST7565_COLORFMT FB_FMT_Y1
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/* Bytes per logical row andactual device row */
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#define ST7565_XSTRIDE (ST7565_XRES >> 3) /* Pixels arrange "horizontally
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* for 'user' */
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#define ST7565_YSTRIDE (ST7565_YRES >> 3) /* But actual device
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* arrangement is 'vertical' */
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/* The size of the shadow frame buffer */
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#define ST7565_FBSIZE (ST7565_XRES * ST7565_YSTRIDE)
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/* Bit helpers */
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#define LS_BIT (1 << 0)
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#define MS_BIT (1 << 7)
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/****************************************************************************
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* Private Type Definition
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****************************************************************************/
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/* This structure describes the state of this driver */
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struct st7565_dev_s
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{
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/* Publicly visible device structure */
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struct lcd_dev_s dev;
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/* Private LCD-specific information follows */
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FAR struct st7565_lcd_s *lcd;
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uint8_t contrast;
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uint8_t power_level;
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/* TODO implement READ mode, possible in 8080bus interface */
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/* The ST7565 does not support reading from the display memory in SPI mode.
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* Since there is 1 BPP and access is byte-by-byte, it is necessary to keep
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* a shadow copy of the framebuffer memory.
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*/
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uint8_t fb[ST7565_FBSIZE];
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Drivers helpers */
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static inline void st7565_reset(FAR struct st7565_dev_s *priv, bool on);
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static inline void st7565_select(FAR struct st7565_dev_s *priv);
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static inline void st7565_deselect(FAR struct st7565_dev_s *priv);
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static inline void st7565_cmddata(FAR struct st7565_dev_s *priv, bool cmd);
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static inline int st7565_send_one_data(FAR struct st7565_dev_s *priv,
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uint8_t data);
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static inline int st7565_send_data_buf(FAR struct st7565_dev_s *priv,
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FAR const uint8_t * buf, int size);
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static inline int st7565_backlight(FAR struct st7565_dev_s *priv, int level);
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/* LCD Data Transfer Methods */
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static int st7565_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row,
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fb_coord_t col, FAR const uint8_t *buffer,
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size_t npixels);
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static int st7565_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row,
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fb_coord_t col, FAR uint8_t *buffer,
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size_t npixels);
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/* LCD Configuration */
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static int st7565_getvideoinfo(FAR struct lcd_dev_s *dev,
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FAR struct fb_videoinfo_s *vinfo);
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static int st7565_getplaneinfo(FAR struct lcd_dev_s *dev,
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unsigned int planeno,
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FAR struct lcd_planeinfo_s *pinfo);
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/* LCD RGB Mapping */
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#ifdef CONFIG_FB_CMAP
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# error "RGB color mapping not supported by this driver"
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#endif
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/* Cursor Controls */
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#ifdef CONFIG_FB_HWCURSOR
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# error "Cursor control not supported by this driver"
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#endif
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/* LCD Specific Controls */
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static int st7565_getpower(struct lcd_dev_s *dev);
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static int st7565_setpower(struct lcd_dev_s *dev, int power);
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static int st7565_getcontrast(struct lcd_dev_s *dev);
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static int st7565_setcontrast(struct lcd_dev_s *dev,
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unsigned int contrast);
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/* Initialization */
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static inline void up_clear(FAR struct st7565_dev_s *priv);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* This is working memory allocated by the LCD driver for each LCD device
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* and for each color plane. This memory will hold one raster line of data.
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* The size of the allocated run buffer must therefore be at least
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* (bpp * xres / 8). Actual alignment of the buffer must conform to the
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* bitwidth of the underlying pixel type.
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*
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* If there are multiple planes, they may share the same working buffer
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* because different planes will not be operate on concurrently. However,
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* if there are multiple LCD devices, they must each have unique run buffers.
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*/
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static uint8_t g_runbuffer[ST7565_XSTRIDE + 1];
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/* This structure describes the overall LCD video controller */
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static const struct fb_videoinfo_s g_videoinfo =
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{
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.fmt = ST7565_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
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.xres = ST7565_XRES, /* Horizontal resolution in pixel columns */
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.yres = ST7565_YRES, /* Vertical resolution in pixel rows */
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.nplanes = 1, /* Number of color planes supported */
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};
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/* This is the standard, NuttX Plane information object */
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static const struct lcd_planeinfo_s g_planeinfo =
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{
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.putrun = st7565_putrun, /* Put a run into LCD memory */
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.getrun = st7565_getrun, /* Get a run from LCD memory */
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.buffer = (uint8_t *) g_runbuffer, /* Run scratch buffer */
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.bpp = ST7565_BPP, /* Bits-per-pixel */
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};
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/* This is the standard, NuttX LCD driver object */
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static struct st7565_dev_s g_st7565dev =
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{
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.dev =
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{
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/* LCD Configuration */
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.getvideoinfo = st7565_getvideoinfo,
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.getplaneinfo = st7565_getplaneinfo,
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/* LCD RGB Mapping -- Not supported */
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/* Cursor Controls -- Not supported */
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/* LCD Specific Controls */
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.getpower = st7565_getpower,
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.setpower = st7565_setpower,
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.getcontrast = st7565_getcontrast,
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.setcontrast = st7565_setcontrast,
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},
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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: st7565_reset
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*
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* Description:
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* Enable/Disable reset pin of LCD the device.
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*
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* priv - A reference to the driver specific structure
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*
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****************************************************************************/
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static inline void st7565_reset(FAR struct st7565_dev_s *priv, bool on)
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{
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if (priv->lcd->reset != NULL)
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{
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priv->lcd->reset(priv->lcd, on);
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}
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}
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/****************************************************************************
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* Name: st7565_select
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*
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* Description:
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* Select the device (as necessary) before performing any operations.
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*
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* priv - A reference to the driver specific structure
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*
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****************************************************************************/
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static inline void st7565_select(FAR struct st7565_dev_s *priv)
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{
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priv->lcd->select(priv->lcd);
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}
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/****************************************************************************
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* Name: st7565_deselect
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*
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* Description:
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* Deselect the device (as necessary).
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*
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* priv - A reference to the driver specific structure
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*
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****************************************************************************/
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static inline void st7565_deselect(FAR struct st7565_dev_s *priv)
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{
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priv->lcd->deselect(priv->lcd);
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}
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/****************************************************************************
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* Name: st7565_cmddata
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*
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* Description:
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* Select command (A0 = 0) or data (A0 = 1) mode.
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*
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* priv - A reference to the driver specific structure.
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* cmd - If true command mode will be selected.
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*
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****************************************************************************/
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static inline void st7565_cmddata(FAR struct st7565_dev_s *priv, bool cmd)
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{
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priv->lcd->cmddata(priv->lcd, cmd);
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}
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/****************************************************************************
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* Name: st7565_send_one_data
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*
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* Description:
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* Send one data to the LCD driver (A0 = 1).
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*
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* priv - A reference to the driver specific structure.
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* data - Byte to send as data to LCD driver.
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*
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****************************************************************************/
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static inline int st7565_send_one_data(FAR struct st7565_dev_s *priv,
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uint8_t data)
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{
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return priv->lcd->senddata(priv->lcd, &data, 1);
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}
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/****************************************************************************
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* Name: st7565_send_data_buf
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*
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* Description:
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* Send a data buffer to the LCD driver (A0 = 1).
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*
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* priv - A reference to the driver specific structure.
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* buf - Buffer sent as data to LCD driver.
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* size - Size of buffer in bytes.
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*
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****************************************************************************/
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static inline int st7565_send_data_buf(FAR struct st7565_dev_s *priv,
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FAR const uint8_t * buf, int size)
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{
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return priv->lcd->senddata(priv->lcd, buf, size);
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}
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/****************************************************************************
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* Name: st7565_backlight
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*
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* Description:
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* Change backlight level of display.
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*
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* priv - A reference to the driver specific structure.
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* level - Set backlight pwm from 0 CONFIG_LCD_MAXPOWER-1.
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*
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****************************************************************************/
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static inline int st7565_backlight(FAR struct st7565_dev_s *priv, int level)
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{
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return priv->lcd->backlight(priv->lcd, level);
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}
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/****************************************************************************
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* Name: st7565_putrun
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*
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* Description:
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* This method can be used to write a partial raster line to the LCD:
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*
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* dev - The lcd device
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* row - Starting row to write to (range: 0 <= row < yres)
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* col - Starting column to write to (range: 0 <= col <= xres-npixels)
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* buffer - The buffer containing the run to be written to the LCD
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* npixels - The number of pixels to write to the LCD
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* (range: 0 < npixels <= xres-col)
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*
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****************************************************************************/
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static int st7565_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row,
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fb_coord_t col, FAR const uint8_t *buffer,
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size_t npixels)
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{
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FAR struct st7565_dev_s *priv = (FAR struct st7565_dev_s *)dev;
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FAR uint8_t *fbptr;
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FAR uint8_t *ptr;
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uint8_t fbmask;
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uint8_t page;
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uint8_t usrmask;
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uint8_t i;
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int pixlen;
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ginfo("row: %d col: %d npixels: %d\n", row, col, npixels);
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DEBUGASSERT(buffer);
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/* Clip the run to the display */
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pixlen = npixels;
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if ((unsigned int)col + (unsigned int)pixlen > (unsigned int)ST7565_XRES)
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{
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pixlen = (int)ST7565_XRES - (int)col;
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}
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/* Verify that some portion of the run remains on the display */
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if (pixlen <= 0 || row > ST7565_YRES)
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{
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return OK;
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}
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/* Get the page number.
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* The range of 64 lines is divided up into eight pages of 8 lines each.
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*/
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page = row >> 3;
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/* Update the shadow frame buffer memory.
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* First determine the pixel position in the frame buffer memory.
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* Pixels are organized like this:
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*
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* --------+---+---+---+---+-...-+-----+
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* Segment | 0 | 1 | 2 | 3 | ... | 131 |
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* --------+---+---+---+---+-...-+-----+
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* Bit 0 | | X | | | | |
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* Bit 1 | | X | | | | |
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* Bit 2 | | X | | | | |
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* Bit 3 | | X | | | | |
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* Bit 4 | | X | | | | |
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* Bit 5 | | X | | | | |
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* Bit 6 | | X | | | | |
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* Bit 7 | | X | | | | |
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* --------+---+---+---+---+-...-+-----+
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*
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* So, in order to draw a white, horizontal line, at row 45. we would have
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* to modify all of the bytes in* page 45/8 = 5. We would have to set bit
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* 45%8 = 5 in every byte in the page.
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*/
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fbmask = 1 << (row & 7);
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fbptr = &priv->fb[page * ST7565_XRES + col];
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ptr = fbptr;
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#ifdef CONFIG_LCD_PACKEDMSFIRST
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usrmask = MS_BIT;
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#else
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usrmask = LS_BIT;
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#endif
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for (i = 0; i < pixlen; i++)
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{
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/* Set or clear the corresponding bit */
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if ((*buffer & usrmask) != 0)
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{
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*ptr++ |= fbmask;
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}
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else
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{
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*ptr++ &= ~fbmask;
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}
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/* Inc/Decrement to the next source pixel */
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#ifdef CONFIG_LCD_PACKEDMSFIRST
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if (usrmask == LS_BIT)
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{
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buffer++;
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usrmask = MS_BIT;
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}
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else
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{
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usrmask >>= 1;
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}
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#else
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if (usrmask == MS_BIT)
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{
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buffer++;
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usrmask = LS_BIT;
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}
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else
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{
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usrmask <<= 1;
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}
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#endif
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}
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/* Select and lock the device */
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st7565_select(priv);
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/* Select command transfer */
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st7565_cmddata(priv, true);
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/* Set the starting position for the run */
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st7565_send_one_data(priv, ST7565_SETPAGESTART + page);
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st7565_send_one_data(priv, ST7565_SETCOLL + (col & 0x0f));
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st7565_send_one_data(priv, ST7565_SETCOLH + (col >> 4));
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/* Select data transfer */
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|
|
st7565_cmddata(priv, false);
|
|
|
|
/* Then transfer all of the data */
|
|
|
|
st7565_send_data_buf(priv, fbptr, pixlen);
|
|
|
|
/* Unlock and de-select the device */
|
|
|
|
st7565_deselect(priv);
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7565_getrun
|
|
*
|
|
* TODO implement read function that possible in 8080bus
|
|
*
|
|
* Description:
|
|
* This method can be used to read a partial raster line from the LCD:
|
|
*
|
|
* row - Starting row to read from (range: 0 <= row < yres)
|
|
* col - Starting column to read read (range: 0 <= col <= xres-npixels)
|
|
* buffer - The buffer in which to return the run read from the LCD
|
|
* npixels - The number of pixels to read from the LCD
|
|
* (range: 0 < npixels <= xres-col)
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7565_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row,
|
|
fb_coord_t col, FAR uint8_t *buffer,
|
|
size_t npixels)
|
|
{
|
|
FAR struct st7565_dev_s *priv = (FAR struct st7565_dev_s *)dev;
|
|
FAR uint8_t *fbptr;
|
|
uint8_t page;
|
|
uint8_t fbmask;
|
|
uint8_t usrmask;
|
|
uint8_t i;
|
|
int pixlen;
|
|
|
|
ginfo("row: %d col: %d npixels: %d\n", row, col, npixels);
|
|
DEBUGASSERT(buffer);
|
|
|
|
/* Clip the run to the display */
|
|
|
|
pixlen = npixels;
|
|
if ((unsigned int)col + (unsigned int)pixlen > (unsigned int)ST7565_XRES)
|
|
{
|
|
pixlen = (int)ST7565_XRES - (int)col;
|
|
}
|
|
|
|
/* Verify that some portion of the run is actually the display */
|
|
|
|
if (pixlen <= 0 || row > ST7565_YRES)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Then transfer the display data from the shadow frame buffer memory */
|
|
|
|
/* Get the page number.
|
|
* The range of 64 lines is divided up into eight pages of 8 lines each.
|
|
*/
|
|
|
|
page = row >> 3;
|
|
|
|
/* Update the shadow frame buffer memory.
|
|
* First determine the pixel position in the frame buffer memory.
|
|
* Pixels are organized like this:
|
|
*
|
|
* --------+---+---+---+---+-...-+-----+
|
|
* Segment | 0 | 1 | 2 | 3 | ... | 131 |
|
|
* --------+---+---+---+---+-...-+-----+
|
|
* Bit 0 | | X | | | | |
|
|
* Bit 1 | | X | | | | |
|
|
* Bit 2 | | X | | | | |
|
|
* Bit 3 | | X | | | | |
|
|
* Bit 4 | | X | | | | |
|
|
* Bit 5 | | X | | | | |
|
|
* Bit 6 | | X | | | | |
|
|
* Bit 7 | | X | | | | |
|
|
* --------+---+---+---+---+-...-+-----+
|
|
*
|
|
* So, in order to draw a white, horizontal line, at row 45. we would have
|
|
* to modify all of the bytes in page 45/8 = 5. We would have to set bit
|
|
* 45%8 = 5 in every byte in the page.
|
|
*/
|
|
|
|
fbmask = 1 << (row & 7);
|
|
fbptr = &priv->fb[page * ST7565_XRES + col];
|
|
#ifdef CONFIG_LCD_PACKEDMSFIRST
|
|
usrmask = MS_BIT;
|
|
#else
|
|
usrmask = LS_BIT;
|
|
#endif
|
|
|
|
*buffer = 0;
|
|
for (i = 0; i < pixlen; i++)
|
|
{
|
|
/* Set or clear the corresponding bit */
|
|
|
|
uint8_t byte = *fbptr++;
|
|
if ((byte & fbmask) != 0)
|
|
{
|
|
*buffer |= usrmask;
|
|
}
|
|
|
|
/* Inc/Decrement to the next destination pixel.
|
|
* Hmmmm. It looks like this logic could write past the end of the
|
|
* user buffer. Revisit this!
|
|
*/
|
|
|
|
#ifdef CONFIG_LCD_PACKEDMSFIRST
|
|
if (usrmask == LS_BIT)
|
|
{
|
|
buffer++;
|
|
*buffer = 0;
|
|
usrmask = MS_BIT;
|
|
}
|
|
else
|
|
{
|
|
usrmask >>= 1;
|
|
}
|
|
#else
|
|
if (usrmask == MS_BIT)
|
|
{
|
|
buffer++;
|
|
*buffer = 0;
|
|
usrmask = LS_BIT;
|
|
}
|
|
else
|
|
{
|
|
usrmask <<= 1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7565_getvideoinfo
|
|
*
|
|
* Description:
|
|
* Get information about the LCD video controller configuration.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7565_getvideoinfo(FAR struct lcd_dev_s *dev,
|
|
FAR struct fb_videoinfo_s *vinfo)
|
|
{
|
|
DEBUGASSERT(dev && vinfo);
|
|
ginfo("fmt: %d xres: %d yres: %d nplanes: %d\n",
|
|
g_videoinfo.fmt, g_videoinfo.xres, g_videoinfo.yres,
|
|
g_videoinfo.nplanes);
|
|
memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s));
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7565_getplaneinfo
|
|
*
|
|
* Description:
|
|
* Get information about the configuration of each LCD color plane.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7565_getplaneinfo(FAR struct lcd_dev_s *dev,
|
|
unsigned int planeno,
|
|
FAR struct lcd_planeinfo_s *pinfo)
|
|
{
|
|
DEBUGASSERT(dev && pinfo && planeno == 0);
|
|
ginfo("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
|
|
memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
|
|
pinfo->dev = dev;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7565_getpower
|
|
*
|
|
* Description:
|
|
* Get the LCD panel power status
|
|
* (0: full off - CONFIG_LCD_MAXPOWER: full on).
|
|
* On backlit LCDs, this setting may correspond to the backlight setting.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7565_getpower(struct lcd_dev_s *dev)
|
|
{
|
|
struct st7565_dev_s *priv = (struct st7565_dev_s *)dev;
|
|
DEBUGASSERT(priv);
|
|
ginfo("powered: %d\n", priv->power_level);
|
|
return priv->power_level;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7565_setpower
|
|
*
|
|
* Description:
|
|
* Enable/disable LCD panel power
|
|
* (0: full off - CONFIG_LCD_MAXPOWER: full on).
|
|
* On backlight LCDs, this setting may correspond to the backlight setting.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7565_setpower(struct lcd_dev_s *dev, int power)
|
|
{
|
|
struct st7565_dev_s *priv = (struct st7565_dev_s *)dev;
|
|
|
|
DEBUGASSERT(priv && (unsigned)power <= CONFIG_LCD_MAXPOWER);
|
|
ginfo("power: %d powered: %d\n", power, priv->power_level);
|
|
|
|
/* Select and lock the device */
|
|
|
|
st7565_select(priv);
|
|
|
|
st7565_cmddata(priv, true);
|
|
|
|
if (power <= 0)
|
|
{
|
|
/* Turn the display off */
|
|
|
|
st7565_send_one_data(priv, ST7565_DISPOFF);
|
|
st7565_backlight(priv, 0);
|
|
priv->power_level = 0;
|
|
}
|
|
else
|
|
{
|
|
st7565_send_one_data(priv, ST7565_DISPON);
|
|
st7565_send_one_data(priv, ST7565_DISPRAM);
|
|
|
|
/* Don't use value 1 of backlight to allow low power mode */
|
|
|
|
if (power == 1)
|
|
{
|
|
st7565_backlight(priv, 0);
|
|
}
|
|
else
|
|
{
|
|
st7565_backlight(priv, power);
|
|
}
|
|
|
|
priv->power_level = 1;
|
|
}
|
|
|
|
st7565_cmddata(priv, false);
|
|
st7565_deselect(priv);
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7565_getcontrast
|
|
*
|
|
* Description:
|
|
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7565_getcontrast(struct lcd_dev_s *dev)
|
|
{
|
|
struct st7565_dev_s *priv = (struct st7565_dev_s *)dev;
|
|
DEBUGASSERT(priv);
|
|
return (int)priv->contrast;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7565_setcontrast
|
|
*
|
|
* Description:
|
|
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7565_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
|
|
{
|
|
struct st7565_dev_s *priv = (struct st7565_dev_s *)dev;
|
|
|
|
ginfo("contrast: %d\n", contrast);
|
|
DEBUGASSERT(priv);
|
|
|
|
if (contrast > 255)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Select and lock the device */
|
|
|
|
st7565_select(priv);
|
|
|
|
/* Select command transfer */
|
|
|
|
st7565_cmddata(priv, true);
|
|
|
|
/* Set the contrast */
|
|
|
|
st7565_send_one_data(priv, ST7565_SETEVMODE);
|
|
st7565_send_one_data(priv, ST7565_SETEVREG(contrast));
|
|
priv->contrast = contrast;
|
|
|
|
/* Deselect command transfer */
|
|
|
|
st7565_cmddata(priv, false);
|
|
|
|
/* Unlock and de-select the device */
|
|
|
|
st7565_deselect(priv);
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: up_clear
|
|
*
|
|
* Description:
|
|
* Clear the display.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline void up_clear(FAR struct st7565_dev_s *priv)
|
|
{
|
|
int page;
|
|
int i;
|
|
|
|
/* Clear the framebuffer */
|
|
|
|
memset(priv->fb, 0x00, ST7565_FBSIZE);
|
|
|
|
/* Select and lock the device */
|
|
|
|
st7565_select(priv);
|
|
|
|
/* Go throw all 8 pages */
|
|
|
|
for (page = 0, i = 0; i < 8; i++)
|
|
{
|
|
/* Select command transfer */
|
|
|
|
st7565_cmddata(priv, true);
|
|
|
|
/* Set the starting position for the run */
|
|
|
|
st7565_send_one_data(priv, ST7565_SETPAGESTART + i);
|
|
st7565_send_one_data(priv, ST7565_SETCOLL);
|
|
st7565_send_one_data(priv, ST7565_SETCOLH);
|
|
|
|
/* Select data transfer */
|
|
|
|
st7565_cmddata(priv, false);
|
|
|
|
/* Then transfer all 96 columns of data */
|
|
|
|
st7565_send_data_buf(priv, &priv->fb[page * ST7565_XRES],
|
|
ST7565_XRES);
|
|
}
|
|
|
|
/* Unlock and de-select the device */
|
|
|
|
st7565_deselect(priv);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: st7565_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the ST7565 video hardware. The initial state of the
|
|
* OLED is fully initialized, display memory cleared, and the OLED ready to
|
|
* use, but with the power setting at 0 (full off == sleep mode).
|
|
*
|
|
* Input Parameters:
|
|
*
|
|
* lcd - A reference to the lcd low level driver instance.
|
|
* devno - A value in the range of 0 throw CONFIG_ST7565_NINTERFACES-1.
|
|
* This allows support for multiple OLED devices.
|
|
*
|
|
* Returned Value:
|
|
*
|
|
* On success, this function returns a reference to the LCD object
|
|
* for the specified
|
|
* OLED. NULL is returned on any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct lcd_dev_s *st7565_initialize(FAR struct st7565_lcd_s *lcd,
|
|
unsigned int devno)
|
|
{
|
|
/* Configure and enable LCD */
|
|
|
|
FAR struct st7565_dev_s *priv = &g_st7565dev;
|
|
|
|
ginfo("Initializing\n");
|
|
DEBUGASSERT(lcd && devno == 0);
|
|
|
|
/* Save the reference to the SPI device */
|
|
|
|
priv->lcd = lcd;
|
|
|
|
/* Select and lock the device */
|
|
|
|
st7565_select(priv);
|
|
|
|
/* Reset device */
|
|
|
|
st7565_reset(priv, true);
|
|
|
|
/* it seems too long but written in NHD-C12864KGZ DISPLAY
|
|
* INITIALIZATION...
|
|
*/
|
|
|
|
up_mdelay(150);
|
|
|
|
st7565_reset(priv, false);
|
|
|
|
/* it seems too long but written in NHD-C12864KGZ DISPLAY
|
|
* INITIALIZATION...
|
|
*/
|
|
|
|
up_mdelay(150);
|
|
|
|
/* Make sure that LCD backlight is off */
|
|
|
|
st7565_backlight(priv, 0);
|
|
|
|
/* Select command transfer */
|
|
|
|
st7565_cmddata(priv, true);
|
|
|
|
/* Reset by command in case of st7565_reset not implemented */
|
|
|
|
st7565_send_one_data(priv, ST7565_EXIT_SOFTRST);
|
|
|
|
/* Follow NHD-C12864KGZ DISPLAY INITIALIZATION... */
|
|
|
|
#if defined(CONFIG_NHD_C12864KGZ)
|
|
|
|
st7565_send_one_data(priv, ST7565_BIAS_1_9);
|
|
|
|
st7565_send_one_data(priv, ST7565_REG_RES_5_5);
|
|
st7565_send_one_data(priv, ST7565_SETEVMODE);
|
|
st7565_send_one_data(priv, ST7565_SETEVREG(15));
|
|
st7565_send_one_data(priv, ST7565_POWERCTRL_INT);
|
|
st7565_send_one_data(priv, ST7565_SETSTARTLINE);
|
|
|
|
#elif defined(CONFIG_ERC_12864_3)
|
|
|
|
st7565_send_one_data(priv, ST7565_ADCNORMAL);
|
|
st7565_send_one_data(priv, ST7565_SETCOMREVERSE);
|
|
st7565_send_one_data(priv, ST7565_BIAS_1_9);
|
|
st7565_send_one_data(priv, ST7565_POWERCTRL_INT);
|
|
st7565_send_one_data(priv, ST7565_REG_RES_5_5);
|
|
st7565_send_one_data(priv, ST7565_SETEVMODE);
|
|
st7565_send_one_data(priv, ST7565_SETEVREG(0x24));
|
|
st7565_send_one_data(priv, ST7565_SETSTARTLINE);
|
|
|
|
#elif defined(CONFIG_AQM_1248A)
|
|
|
|
st7565_send_one_data(priv, ST7565_DISPOFF);
|
|
st7565_send_one_data(priv, ST7565_ADCNORMAL);
|
|
st7565_send_one_data(priv, ST7565_SETCOMREVERSE);
|
|
st7565_send_one_data(priv, ST7565_BIAS_1_7);
|
|
|
|
st7565_send_one_data(priv, ST7565_POWERCTRL_B);
|
|
up_mdelay(2);
|
|
st7565_send_one_data(priv, ST7565_POWERCTRL_BR);
|
|
up_mdelay(2);
|
|
st7565_send_one_data(priv, ST7565_POWERCTRL_INT);
|
|
|
|
st7565_send_one_data(priv, ST7565_REG_RES_4_5);
|
|
st7565_send_one_data(priv, ST7565_SETEVMODE);
|
|
st7565_send_one_data(priv, ST7565_SETEVREG(0x1c));
|
|
st7565_send_one_data(priv, ST7565_DISPRAM);
|
|
st7565_send_one_data(priv, ST7565_SETSTARTLINE);
|
|
st7565_send_one_data(priv, ST7565_DISPNORMAL);
|
|
st7565_send_one_data(priv, ST7565_DISPON);
|
|
|
|
#else
|
|
# error "No initialization sequence selected"
|
|
#endif
|
|
|
|
#if 0
|
|
st7565_send_one_data(priv, ST7565_DISPON);
|
|
st7565_send_one_data(priv, ST7565_SETCOMREVERSE);
|
|
st7565_send_one_data(priv, ST7565_REG_RES_RR1);
|
|
st7565_send_one_data(priv, ST7565_SETEV);
|
|
st7565_send_one_data(priv, 0x32);
|
|
st7565_send_one_data(priv, ST7565_POWERCTRL);
|
|
st7565_send_one_data(priv, ST7565_SETSTARTLINE);
|
|
st7565_send_one_data(priv, ST7565_SETPAGESTART);
|
|
st7565_send_one_data(priv, ST7565_SETCOLH);
|
|
st7565_send_one_data(priv, ST7565_SETCOLL);
|
|
st7565_send_one_data(priv, ST7565_DISPON);
|
|
st7565_send_one_data(priv, ST7565_DISPRAM);
|
|
#endif
|
|
|
|
#ifdef CONFIG_ST7565_MIRROR_X
|
|
st7565_send_one_data(priv, ST7565_ADCINVERSE);
|
|
#else
|
|
st7565_send_one_data(priv, ST7565_ADCNORMAL);
|
|
#endif
|
|
|
|
#ifdef CONFIG_ST7565_MIRROR_Y
|
|
st7565_send_one_data(priv, ST7565_SETCOMREVERSE);
|
|
#else
|
|
st7565_send_one_data(priv, ST7565_SETCOMNORMAL);
|
|
#endif
|
|
|
|
#ifdef CONFIG_ST7565_INVERSE_VIDEO
|
|
st7565_send_one_data(priv, ST7565_DISPINVERSE);
|
|
#else
|
|
st7565_send_one_data(priv, ST7565_DISPNORMAL);
|
|
#endif
|
|
|
|
/* Let go of the SPI lock and de-select the device */
|
|
|
|
st7565_deselect(priv);
|
|
|
|
up_mdelay(10);
|
|
|
|
/* Clear the framebuffer */
|
|
|
|
up_clear(priv);
|
|
|
|
return &priv->dev;
|
|
}
|