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- /**************************************************************************************
- * drivers/lcd/st7565.c
- *
- * Definitions for the ST7565 128x64 Dot Matrix LCD Driver with C
- *
- * Copyright (C) 2014 Pierre-noel Bouteville. All rights reserved.
- * Author: Pierre-noel Boutevlle <pnb990@gmail.com>
- *
- * Based on drivers/lcd/st7567.c
- * Copyright (C) 2013 Zilogic Systems. All rights reserved.
- * Author: Manikandan <code@zilogic.com>
- *
- * Based on drivers/lcd/ug-9664hswag01.c
- *
- * Copyright (C) 2011 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Reference: "Product Specification, OEL Display Module, ST7567", Univision
- * Technology Inc., SAS1-6020-B, January 3, 2008.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS 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.
- *
- **************************************************************************************/
- /**************************************************************************************
- * Included Files
- **************************************************************************************/
- #include <nuttx/config.h>
- #include <sys/types.h>
- #include <stdint.h>
- #include <stdbool.h>
- #include <string.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/arch.h>
- #include <nuttx/spi/spi.h>
- #include <nuttx/lcd/lcd.h>
- #include <nuttx/lcd/st7565.h>
- #include "st7565.h"
- /**************************************************************************************
- * Pre-processor Definitions
- **************************************************************************************/
- /* Configuration **********************************************************************/
- /* ST7565 Configuration Settings:
- *
- * CONFIG_ST7565_NINTERFACES - Specifies the number of physical
- * ST7565 devices that will be supported. NOTE: At present, this
- * must be undefined or defined to be 1.
- * CONFIG_LCD_ST7565DEBUG - Enable detailed ST7565 debst7565 output
- * (CONFIG_DEBUG_FEATURES and CONFIG_VERBOSE must also be enabled).
- *
- * Required LCD driver settings:
- * CONFIG_LCD_ST7565 - Enable ST7565 support
- * CONFIG_LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted.
- *
- */
- /* Verify that all configuration requirements have been met */
- /* CONFIG_ST7565_NINTERFACES determines the number of physical interfaces
- * that will be supported.
- */
- #ifndef CONFIG_ST7565_NINTERFACES
- # define CONFIG_ST7565_NINTERFACES 1
- #endif
- #if CONFIG_ST7565_NINTERFACES != 1
- # warning "Only a single ST7565 interface is supported"
- # undef CONFIG_ST7565_NINTERFACES
- # define CONFIG_ST7565_NINTERFACES 1
- #endif
- /* Verbose debst7565 must also be enabled to use the extra OLED debst7565 */
- #ifndef CONFIG_DEBUG_FEATURES
- # undef CONFIG_DEBUG_INFO
- # undef CONFIG_DEBUG_GRAPHICS
- #endif
- #ifndef CONFIG_DEBUG_INFO
- # undef CONFIG_LCD_ST7565DEBUG
- #endif
- /* Check contrast selection */
- #ifndef CONFIG_LCD_MAXCONTRAST
- # define CONFIG_LCD_MAXCONTRAST 255
- #endif
- #if CONFIG_LCD_MAXCONTRAST <= 0 || CONFIG_LCD_MAXCONTRAST > 255
- # error "CONFIG_LCD_MAXCONTRAST exceeds supported maximum"
- #endif
- #if CONFIG_LCD_MAXCONTRAST < 255
- # warning "Optimal setting of CONFIG_LCD_MAXCONTRAST is 255"
- #endif
- /* Color Properties *******************************************************************/
- /* The ST7565 display controller can handle a resolution of 128x64.
- */
- /* Display Resolution */
- #ifdef CONFIG_ST7565_XRES
- # define ST7565_XRES CONFIG_ST7565_XRES
- #else
- # define ST7565_XRES 128
- #endif
- #ifdef CONFIG_ST7565_YRES
- # define ST7565_YRES CONFIG_ST7565_YRES
- #else
- # define ST7565_YRES 64
- #endif
- /* Color depth and format */
- #define ST7565_BPP 1
- #define ST7565_COLORFMT FB_FMT_Y1
- /* Bytes per logical row andactual device row */
- #define ST7565_XSTRIDE (ST7565_XRES >> 3) /* Pixels arrange "horizontally
- * for user" */
- #define ST7565_YSTRIDE (ST7565_YRES >> 3) /* But actual device
- * arrangement is "vertical" */
- /* The size of the shadow frame buffer */
- #define ST7565_FBSIZE (ST7565_XRES * ST7565_YSTRIDE)
- /* Bit helpers */
- #define LS_BIT (1 << 0)
- #define MS_BIT (1 << 7)
- /**************************************************************************************
- * Private Type Definition
- **************************************************************************************/
- /* This structure describes the state of this driver */
- struct st7565_dev_s
- {
- /* Publicly visible device structure */
- struct lcd_dev_s dev;
- /* Private LCD-specific information follows */
- FAR struct st7565_lcd_s *lcd;
- uint8_t contrast;
- uint8_t power_level;
- /* TODO implement READ mode, possible in 8080bus interface */
- /* The ST7565 does not support reading from the display memory in SPI mode.
- * Since there is 1 BPP and access is byte-by-byte, it is necessary to keep
- * a shadow copy of the framebuffer memory. */
- uint8_t fb[ST7565_FBSIZE];
- };
- /**************************************************************************************
- * Private Function Prototypes
- **************************************************************************************/
- /* Drivers helpers */
- static inline void st7565_reset(FAR struct st7565_dev_s *priv, bool on);
- static inline void st7565_select(FAR struct st7565_dev_s *priv);
- static inline void st7565_deselect(FAR struct st7565_dev_s *priv);
- static inline void st7565_cmddata(FAR struct st7565_dev_s *priv, bool cmd);
- static inline int st7565_send_one_data(FAR struct st7565_dev_s *priv,
- uint8_t data);
- static inline int st7565_send_data_buf(FAR struct st7565_dev_s *priv,
- FAR const uint8_t * buf, int size);
- static inline int st7565_backlight(FAR struct st7565_dev_s *priv, int level);
- /* LCD Data Transfer Methods */
- static int st7565_putrun(fb_coord_t row, fb_coord_t col,
- FAR const uint8_t * buffer, size_t npixels);
- static int st7565_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t * buffer,
- size_t npixels);
- /* LCD Configuration */
- static int st7565_getvideoinfo(FAR struct lcd_dev_s *dev,
- FAR struct fb_videoinfo_s *vinfo);
- static int st7565_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
- FAR struct lcd_planeinfo_s *pinfo);
- /* LCD RGB Mapping */
- #ifdef CONFIG_FB_CMAP
- # error "RGB color mapping not supported by this driver"
- #endif
- /* Cursor Controls */
- #ifdef CONFIG_FB_HWCURSOR
- # error "Cursor control not supported by this driver"
- #endif
- /* LCD Specific Controls */
- static int st7565_getpower(struct lcd_dev_s *dev);
- static int st7565_setpower(struct lcd_dev_s *dev, int power);
- static int st7565_getcontrast(struct lcd_dev_s *dev);
- static int st7565_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
- /* Initialization */
- static inline void up_clear(FAR struct st7565_dev_s *priv);
- /**************************************************************************************
- * Private Data
- **************************************************************************************/
- /* This is working memory allocated by the LCD driver for each LCD device
- * and for each color plane. This memory will hold one raster line of data.
- * The size of the allocated run buffer must therefore be at least
- * (bpp * xres / 8). Actual alignment of the buffer must conform to the
- * bitwidth of the underlying pixel type.
- *
- * If there are multiple planes, they may share the same working buffer
- * because different planes will not be operate on concurrently. However,
- * if there are multiple LCD devices, they must each have unique run buffers.
- */
- static uint8_t g_runbuffer[ST7565_XSTRIDE + 1];
- /* This structure describes the overall LCD video controller */
- static const struct fb_videoinfo_s g_videoinfo =
- {
- .fmt = ST7565_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
- .xres = ST7565_XRES, /* Horizontal resolution in pixel columns */
- .yres = ST7565_YRES, /* Vertical resolution in pixel rows */
- .nplanes = 1, /* Number of color planes supported */
- };
- /* This is the standard, NuttX Plane information object */
- static const struct lcd_planeinfo_s g_planeinfo =
- {
- .putrun = st7565_putrun, /* Put a run into LCD memory */
- .getrun = st7565_getrun, /* Get a run from LCD memory */
- .buffer = (uint8_t *) g_runbuffer, /* Run scratch buffer */
- .bpp = ST7565_BPP, /* Bits-per-pixel */
- };
- /* This is the standard, NuttX LCD driver object */
- static struct st7565_dev_s g_st7565dev =
- {
- .dev =
- {
- /* LCD Configuration */
- .getvideoinfo = st7565_getvideoinfo,
- .getplaneinfo = st7565_getplaneinfo,
- /* LCD RGB Mapping -- Not supported */
- /* Cursor Controls -- Not supported */
- /* LCD Specific Controls */
- .getpower = st7565_getpower,
- .setpower = st7565_setpower,
- .getcontrast = st7565_getcontrast,
- .setcontrast = st7565_setcontrast,
- },
- };
- /**************************************************************************************
- * Private Functions
- **************************************************************************************/
- /**************************************************************************************
- * Name: st7565_reset
- *
- * Description:
- * Enable/Disable reset pin of LCD the device.
- *
- * priv - A reference to the driver specific structure
- *
- **************************************************************************************/
- static inline void st7565_reset(FAR struct st7565_dev_s *priv, bool on)
- {
- if (priv->lcd->reset != NULL)
- {
- priv->lcd->reset(priv->lcd, on);
- }
- }
- /**************************************************************************************
- * Name: st7565_select
- *
- * Description:
- * Select the device (as necessary) before performing any operations.
- *
- * priv - A reference to the driver specific structure
- *
- **************************************************************************************/
- static inline void st7565_select(FAR struct st7565_dev_s *priv)
- {
- priv->lcd->select(priv->lcd);
- }
- /**************************************************************************************
- * Name: st7565_deselect
- *
- * Description:
- * Deselect the device (as necessary).
- *
- * priv - A reference to the driver specific structure
- *
- **************************************************************************************/
- static inline void st7565_deselect(FAR struct st7565_dev_s *priv)
- {
- priv->lcd->deselect(priv->lcd);
- }
- /**************************************************************************************
- * Name: st7565_cmddata
- *
- * Description:
- * Select command (A0 = 0) or data (A0 = 1) mode.
- *
- * priv - A reference to the driver specific structure.
- * cmd - If true command mode will be selected.
- *
- **************************************************************************************/
- static inline void st7565_cmddata(FAR struct st7565_dev_s *priv, bool cmd)
- {
- priv->lcd->cmddata(priv->lcd, cmd);
- }
- /**************************************************************************************
- * Name: st7565_send_one_data
- *
- * Description:
- * Send one data to the LCD driver (A0 = 1).
- *
- * priv - A reference to the driver specific structure.
- * data - Byte to send as data to LCD driver.
- *
- **************************************************************************************/
- static inline int st7565_send_one_data(FAR struct st7565_dev_s *priv,
- uint8_t data)
- {
- return priv->lcd->senddata(priv->lcd, &data, 1);
- }
- /**************************************************************************************
- * Name: st7565_send_data_buf
- *
- * Description:
- * Send a data buffer to the LCD driver (A0 = 1).
- *
- * priv - A reference to the driver specific structure.
- * buf - Buffer sent as data to LCD driver.
- * size - Size of buffer in bytes.
- *
- **************************************************************************************/
- static inline int st7565_send_data_buf(FAR struct st7565_dev_s *priv,
- FAR const uint8_t * buf, int size)
- {
- return priv->lcd->senddata(priv->lcd, buf, size);
- }
- /**************************************************************************************
- * Name: st7565_backlight
- *
- * Description:
- * Change backlight level of display.
- *
- * priv - A reference to the driver specific structure.
- * level - Set backlight pwm from 0 CONFIG_LCD_MAXPOWER-1.
- *
- **************************************************************************************/
- static inline int st7565_backlight(FAR struct st7565_dev_s *priv, int level)
- {
- return priv->lcd->backlight(priv->lcd, level);
- }
- /**************************************************************************************
- * Name: st7565_putrun
- *
- * Description:
- * This method can be used to write a partial raster line to the LCD:
- *
- * row - Starting row to write to (range: 0 <= row < yres)
- * col - Starting column to write to (range: 0 <= col <= xres-npixels)
- * buffer - The buffer containing the run to be written to the LCD
- * npixels - The number of pixels to write to the LCD
- * (range: 0 < npixels <= xres-col)
- *
- **************************************************************************************/
- static int st7565_putrun(fb_coord_t row, fb_coord_t col,
- FAR const uint8_t * buffer, size_t npixels)
- {
- /* Because of this line of code, we will only be able to support a single
- * ST7565 device.
- */
- FAR struct st7565_dev_s *priv = &g_st7565dev;
- FAR uint8_t *fbptr;
- FAR uint8_t *ptr;
- uint8_t fbmask;
- uint8_t page;
- 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 remains on the display */
- if (pixlen <= 0 || row > ST7565_YRES)
- {
- return OK;
- }
- /* 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];
- ptr = fbptr;
- #ifdef CONFIG_LCD_PACKEDMSFIRST
- usrmask = MS_BIT;
- #else
- usrmask = LS_BIT;
- #endif
- for (i = 0; i < pixlen; i++)
- {
- /* Set or clear the corresponding bit */
- if ((*buffer & usrmask) != 0)
- {
- *ptr++ |= fbmask;
- }
- else
- {
- *ptr++ &= ~fbmask;
- }
- /* Inc/Decrement to the next source pixel */
- #ifdef CONFIG_LCD_PACKEDMSFIRST
- if (usrmask == LS_BIT)
- {
- buffer++;
- usrmask = MS_BIT;
- }
- else
- {
- usrmask >>= 1;
- }
- #else
- if (usrmask == MS_BIT)
- {
- buffer++;
- usrmask = LS_BIT;
- }
- else
- {
- usrmask <<= 1;
- }
- #endif
- }
- /* Select and lock the device */
- st7565_select(priv);
- /* Select command transfer */
- st7565_cmddata(priv, true);
- /* Set the starting position for the run */
- (void)st7565_send_one_data(priv, ST7565_SETPAGESTART + page);
- (void)st7565_send_one_data(priv, ST7565_SETCOLL + (col & 0x0f));
- (void)st7565_send_one_data(priv, ST7565_SETCOLH + (col >> 4));
- /* Select data transfer */
- st7565_cmddata(priv, false);
- /* Then transfer all of the data */
- (void)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(fb_coord_t row, fb_coord_t col, FAR uint8_t * buffer,
- size_t npixels)
- {
- /* Because of this line of code, we will only be able to support a single
- * ST7565 device.
- */
- FAR struct st7565_dev_s *priv = &g_st7565dev;
- 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));
- 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: %s\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: %s powered: %s\n", power, priv->power_level);
- /* Select and lock the device */
- st7565_select(priv);
- st7565_cmddata(priv, true);
- if (power <= 0)
- {
- /* Turn the display off */
- (void)st7565_send_one_data(priv, ST7565_DISPOFF);
- (void)st7565_backlight(priv, 0);
- priv->power_level = 0;
- }
- else
- {
- (void)st7565_send_one_data(priv, ST7565_DISPON);
- (void)st7565_send_one_data(priv, ST7565_DISPRAM);
- /* Don't use value 1 of backlight to allow low power mode */
- if (power == 1)
- {
- (void)st7565_backlight(priv, 0);
- }
- else
- {
- (void)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 */
- (void)st7565_send_one_data(priv, ST7565_SETEVMODE);
- (void)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 */
- (void)st7565_send_one_data(priv, ST7565_SETPAGESTART + i);
- (void)st7565_send_one_data(priv, ST7565_SETCOLL);
- (void)st7565_send_one_data(priv, ST7565_SETCOLH);
- /* Select data transfer */
- st7565_cmddata(priv, false);
- /* Then transfer all 96 columns of data */
- (void)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 implemeted */
- (void)st7565_send_one_data(priv, ST7565_EXIT_SOFTRST);
- /* Follow NHD-C12864KGZ DISPLAY INITIALIZATION... */
- #if defined(CONFIG_NHD_C12864KGZ)
- (void)st7565_send_one_data(priv, ST7565_BIAS_1_9);
- (void)st7565_send_one_data(priv, ST7565_REG_RES_5_5);
- (void)st7565_send_one_data(priv, ST7565_SETEVMODE);
- (void)st7565_send_one_data(priv, ST7565_SETEVREG(15));
- (void)st7565_send_one_data(priv, ST7565_POWERCTRL_INT);
- (void)st7565_send_one_data(priv, ST7565_SETSTARTLINE);
- #elif defined(CONFIG_ERC_12864_3)
- (void)st7565_send_one_data(priv, ST7565_ADCNORMAL);
- (void)st7565_send_one_data(priv, ST7565_SETCOMREVERSE);
- (void)st7565_send_one_data(priv, ST7565_BIAS_1_9);
- (void)st7565_send_one_data(priv, ST7565_POWERCTRL_INT);
- (void)st7565_send_one_data(priv, ST7565_REG_RES_5_5);
- (void)st7565_send_one_data(priv, ST7565_SETEVMODE);
- (void)st7565_send_one_data(priv, ST7565_SETEVREG(0x24));
- (void)st7565_send_one_data(priv, ST7565_SETSTARTLINE);
- #elif defined(CONFIG_AQM_1248A)
- (void)st7565_send_one_data(priv, ST7565_DISPOFF);
- (void)st7565_send_one_data(priv, ST7565_ADCNORMAL);
- (void)st7565_send_one_data(priv, ST7565_SETCOMREVERSE);
- (void)st7565_send_one_data(priv, ST7565_BIAS_1_7);
- (void)st7565_send_one_data(priv, ST7565_POWERCTRL_B);
- up_mdelay(2);
- (void)st7565_send_one_data(priv, ST7565_POWERCTRL_BR);
- up_mdelay(2);
- (void)st7565_send_one_data(priv, ST7565_POWERCTRL_INT);
- (void)st7565_send_one_data(priv, ST7565_REG_RES_4_5);
- (void)st7565_send_one_data(priv, ST7565_SETEVMODE);
- (void)st7565_send_one_data(priv, ST7565_SETEVREG(0x1c));
- (void)st7565_send_one_data(priv, ST7565_DISPRAM);
- (void)st7565_send_one_data(priv, ST7565_SETSTARTLINE);
- (void)st7565_send_one_data(priv, ST7565_DISPNORMAL);
- (void)st7565_send_one_data(priv, ST7565_DISPON);
- #else
- # error "No initialization sequence selected"
- #endif
- #if 0
- (void)st7565_send_one_data(priv, ST7565_DISPON);
- (void)st7565_send_one_data(priv, ST7565_SETCOMREVERSE);
- (void)st7565_send_one_data(priv, ST7565_REG_RES_RR1);
- (void)st7565_send_one_data(priv, ST7565_SETEV);
- (void)st7565_send_one_data(priv, 0x32);
- (void)st7565_send_one_data(priv, ST7565_POWERCTRL);
- (void)st7565_send_one_data(priv, ST7565_SETSTARTLINE);
- (void)st7565_send_one_data(priv, ST7565_SETPAGESTART);
- (void)st7565_send_one_data(priv, ST7565_SETCOLH);
- (void)st7565_send_one_data(priv, ST7565_SETCOLL);
- (void)st7565_send_one_data(priv, ST7565_DISPON);
- (void)st7565_send_one_data(priv, ST7565_DISPRAM);
- #endif
- #ifdef CONFIG_ST7565_MIRROR_X
- (void)st7565_send_one_data(priv, ST7565_ADCINVERSE);
- #else
- (void)st7565_send_one_data(priv, ST7565_ADCNORMAL);
- #endif
- #ifdef CONFIG_ST7565_MIRROR_Y
- (void)st7565_send_one_data(priv, ST7565_SETCOMREVERSE);
- #else
- (void)st7565_send_one_data(priv, ST7565_SETCOMNORMAL);
- #endif
- #ifdef CONFIG_ST7565_INVERSE_VIDEO
- (void)st7565_send_one_data(priv, ST7565_DISPINVERSE);
- #else
- (void)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;
- }
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