724 lines
22 KiB
C
724 lines
22 KiB
C
/****************************************************************************
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* drivers/lcd/st7789.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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/****************************************************************************
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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/st7789.h>
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#include "st7789.h"
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#ifdef CONFIG_LCD_ST7789
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Verify that all configuration requirements have been met */
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#ifndef CONFIG_LCD_ST7789_SPIMODE
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# define CONFIG_LCD_ST7789_SPIMODE SPIDEV_MODE0
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#endif
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/* SPI frequency */
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#ifndef CONFIG_LCD_ST7789_FREQUENCY
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# define CONFIG_LCD_ST7789_FREQUENCY 1000000
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#endif
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/* Check contrast selection */
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#if !defined(CONFIG_LCD_MAXCONTRAST)
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# define CONFIG_LCD_MAXCONTRAST 1
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#endif
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/* Check power setting */
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#if !defined(CONFIG_LCD_MAXPOWER) || CONFIG_LCD_MAXPOWER < 1
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# define CONFIG_LCD_MAXPOWER 1
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#endif
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#if CONFIG_LCD_MAXPOWER > 255
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# error "CONFIG_LCD_MAXPOWER must be less than 256 to fit in uint8_t"
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#endif
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/* Check orientation */
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#if defined(CONFIG_LCD_PORTRAIT)
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# if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) ||\
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defined(CONFIG_LCD_RPORTRAIT)
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# error "Cannot define both portrait and any other orientations"
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# endif
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#elif defined(CONFIG_LCD_RPORTRAIT)
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# if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
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# error "Cannot define both rportrait and any other orientations"
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# endif
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#elif defined(CONFIG_LCD_LANDSCAPE)
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# ifdef CONFIG_LCD_RLANDSCAPE
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# error "Cannot define both landscape and any other orientations"
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# endif
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#elif !defined(CONFIG_LCD_RLANDSCAPE)
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# define CONFIG_LCD_LANDSCAPE 1
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#endif
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/* Display Resolution */
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#if !defined(CONFIG_LCD_ST7789_XRES)
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# define CONFIG_LCD_ST7789_XRES 240
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#endif
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#if !defined(CONFIG_LCD_ST7789_YRES)
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# define CONFIG_LCD_ST7789_YRES 320
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#endif
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#define ST7789_LUT_SIZE CONFIG_LCD_ST7789_YRES
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#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
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# define ST7789_XRES CONFIG_LCD_ST7789_YRES
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# define ST7789_YRES CONFIG_LCD_ST7789_XRES
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# define ST7789_XOFFSET CONFIG_LCD_ST7789_YOFFSET
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# define ST7789_YOFFSET CONFIG_LCD_ST7789_XOFFSET
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#else
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# define ST7789_XRES CONFIG_LCD_ST7789_XRES
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# define ST7789_YRES CONFIG_LCD_ST7789_YRES
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# define ST7789_XOFFSET CONFIG_LCD_ST7789_XOFFSET
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# define ST7789_YOFFSET CONFIG_LCD_ST7789_YOFFSET
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#endif
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/* Color depth and format */
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#ifdef CONFIG_LCD_ST7789_BPP
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# if (CONFIG_LCD_ST7789_BPP == 12)
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# define ST7789_BPP 12
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# define ST7789_COLORFMT FB_FMT_RGB12_444
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# define ST7789_BYTESPP 2
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# elif (CONFIG_LCD_ST7789_BPP == 16)
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# define ST7789_BPP 16
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# define ST7789_COLORFMT FB_FMT_RGB16_565
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# define ST7789_BYTESPP 2
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# else
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# define ST7789_BPP 16
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# define ST7789_COLORFMT FB_FMT_RGB16_565
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# define ST7789_BYTESPP 2
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# warning "Invalid color depth. Falling back to 16bpp"
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# endif
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure describes the state of this driver */
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struct st7789_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 spi_dev_s *spi; /* SPI device */
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uint8_t bpp; /* Selected color depth */
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uint8_t power; /* Current power setting */
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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
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* buffers.
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*/
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uint16_t runbuffer[ST7789_LUT_SIZE];
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};
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/****************************************************************************
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* Private Function Protototypes
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****************************************************************************/
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/* Misc. Helpers */
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static void st7789_select(FAR struct spi_dev_s *spi, int bits);
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static void st7789_deselect(FAR struct spi_dev_s *spi);
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static inline void st7789_sendcmd(FAR struct st7789_dev_s *dev, uint8_t cmd);
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static void st7789_sleep(FAR struct st7789_dev_s *dev, bool sleep);
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static void st7789_setorientation(FAR struct st7789_dev_s *dev);
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static void st7789_display(FAR struct st7789_dev_s *dev, bool on);
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static void st7789_setarea(FAR struct st7789_dev_s *dev,
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uint16_t x0, uint16_t y0,
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uint16_t x1, uint16_t y1);
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static void st7789_bpp(FAR struct st7789_dev_s *dev, int bpp);
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static void st7789_wrram(FAR struct st7789_dev_s *dev,
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FAR const uint16_t *buff, size_t size);
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#ifndef CONFIG_LCD_NOGETRUN
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static void st7789_rdram(FAR struct st7789_dev_s *dev,
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FAR uint16_t *buff, size_t size);
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#endif
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static void st7789_fill(FAR struct st7789_dev_s *dev, uint16_t color);
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/* LCD Data Transfer Methods */
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static int st7789_putrun(fb_coord_t row, fb_coord_t col,
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FAR const uint8_t *buffer, size_t npixels);
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#ifndef CONFIG_LCD_NOGETRUN
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static int st7789_getrun(fb_coord_t row, fb_coord_t col,
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FAR uint8_t *buffer, size_t npixels);
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#endif
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/* LCD Configuration */
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static int st7789_getvideoinfo(FAR struct lcd_dev_s *dev,
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FAR struct fb_videoinfo_s *vinfo);
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static int st7789_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 Specific Controls */
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static int st7789_getpower(FAR struct lcd_dev_s *dev);
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static int st7789_setpower(FAR struct lcd_dev_s *dev, int power);
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static int st7789_getcontrast(FAR struct lcd_dev_s *dev);
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static int st7789_setcontrast(FAR struct lcd_dev_s *dev,
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unsigned int contrast);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static struct st7789_dev_s g_lcddev;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: st7789_select
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*
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* Description:
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* Select the SPI, locking and re-configuring if necessary
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*
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* Input Parameters:
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* spi - Reference to the SPI driver structure
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* bits - Number of SPI bits
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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*
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****************************************************************************/
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static void st7789_select(FAR struct spi_dev_s *spi, int bits)
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{
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/* Select ST7789 chip (locking the SPI bus in case there are multiple
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* devices competing for the SPI bus
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*/
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SPI_LOCK(spi, true);
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SPI_SELECT(spi, SPIDEV_DISPLAY(0), true);
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/* Now make sure that the SPI bus is configured for the ST7789 (it
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* might have gotten configured for a different device while unlocked)
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*/
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SPI_SETMODE(spi, CONFIG_LCD_ST7789_SPIMODE);
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SPI_SETBITS(spi, bits);
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SPI_SETFREQUENCY(spi, CONFIG_LCD_ST7789_FREQUENCY);
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}
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/****************************************************************************
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* Name: st7789_deselect
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*
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* Description:
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* De-select the SPI
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*
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* Input Parameters:
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* spi - Reference to the SPI driver structure
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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*
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****************************************************************************/
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static void st7789_deselect(FAR struct spi_dev_s *spi)
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{
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/* De-select ST7789 chip and relinquish the SPI bus. */
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SPI_SELECT(spi, SPIDEV_DISPLAY(0), false);
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SPI_LOCK(spi, false);
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}
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/****************************************************************************
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* Name: st7789_sendcmd
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*
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* Description:
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* Send a command to the driver.
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*
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****************************************************************************/
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static inline void st7789_sendcmd(FAR struct st7789_dev_s *dev, uint8_t cmd)
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{
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st7789_select(dev->spi, ST7789_BYTESPP * 8);
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SPI_CMDDATA(dev->spi, SPIDEV_DISPLAY(0), true);
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SPI_SEND(dev->spi, cmd);
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SPI_CMDDATA(dev->spi, SPIDEV_DISPLAY(0), false);
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st7789_deselect(dev->spi);
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}
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/****************************************************************************
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* Name: st7789_sleep
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*
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* Description:
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* Sleep or wake up the driver.
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*
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****************************************************************************/
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static void st7789_sleep(FAR struct st7789_dev_s *dev, bool sleep)
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{
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st7789_sendcmd(dev, sleep ? ST7789_SLPIN : ST7789_SLPOUT);
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up_mdelay(120);
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}
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/****************************************************************************
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* Name: st7789_display
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*
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* Description:
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* Turn on or off the display.
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*
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****************************************************************************/
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static void st7789_display(FAR struct st7789_dev_s *dev, bool on)
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{
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st7789_sendcmd(dev, on ? ST7789_DISPON : ST7789_DISPOFF);
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st7789_sendcmd(dev, ST7789_INVON);
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}
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/****************************************************************************
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* Name: st7789_setorientation
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*
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* Description:
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* Set screen orientation.
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*
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****************************************************************************/
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static void st7789_setorientation(FAR struct st7789_dev_s *dev)
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{
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/* No need to change the orientation in PORTRAIT mode */
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#if !defined(CONFIG_LCD_PORTRAIT)
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st7789_sendcmd(dev, ST7789_MADCTL);
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st7789_select(dev->spi, 8);
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# if defined(CONFIG_LCD_RLANDSCAPE)
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/* RLANDSCAPE : MY=1 MV=1 */
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SPI_SEND(dev->spi, 0xa0);
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# elif defined(CONFIG_LCD_LANDSCAPE)
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/* LANDSCAPE : MX=1 MV=1 */
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SPI_SEND(dev->spi, 0x70);
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# elif defined(CONFIG_LCD_RPORTRAIT)
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/* RPORTRAIT : MX=1 MY=1 */
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SPI_SEND(dev->spi, 0xc0);
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# endif
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st7789_deselect(dev->spi);
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#endif
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}
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/****************************************************************************
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* Name: st7789_setarea
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*
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* Description:
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* Set the rectangular area for an upcoming read or write from RAM.
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*
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****************************************************************************/
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static void st7789_setarea(FAR struct st7789_dev_s *dev,
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uint16_t x0, uint16_t y0,
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uint16_t x1, uint16_t y1)
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{
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/* Set row address */
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st7789_sendcmd(dev, ST7789_RASET);
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st7789_select(dev->spi, 16);
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SPI_SEND(dev->spi, y0 + ST7789_YOFFSET);
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SPI_SEND(dev->spi, y1 + ST7789_YOFFSET);
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st7789_deselect(dev->spi);
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/* Set column address */
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st7789_sendcmd(dev, ST7789_CASET);
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st7789_select(dev->spi, 16);
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SPI_SEND(dev->spi, x0 + ST7789_XOFFSET);
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SPI_SEND(dev->spi, x1 + ST7789_XOFFSET);
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st7789_deselect(dev->spi);
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}
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/****************************************************************************
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* Name: st7789_bpp
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*
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* Description:
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* Set the color depth of the device.
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*
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****************************************************************************/
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static void st7789_bpp(FAR struct st7789_dev_s *dev, int bpp)
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{
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uint8_t depth;
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/* Don't send any command if the depth hasn't changed. */
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if (dev->bpp != bpp)
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{
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/* REVISIT: Works only for 12 and 16 bpp! */
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depth = bpp >> 2 | 1;
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st7789_sendcmd(dev, ST7789_COLMOD);
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st7789_select(dev->spi, 8);
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SPI_SEND(dev->spi, depth);
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st7789_deselect(dev->spi);
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/* Cache the new BPP */
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dev->bpp = bpp;
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}
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}
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/****************************************************************************
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* Name: st7789_wrram
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*
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* Description:
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* Write to the driver's RAM.
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*
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****************************************************************************/
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static void st7789_wrram(FAR struct st7789_dev_s *dev,
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FAR const uint16_t *buff, size_t size)
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{
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st7789_sendcmd(dev, ST7789_RAMWR);
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st7789_select(dev->spi, ST7789_BYTESPP * 8);
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SPI_SNDBLOCK(dev->spi, buff, size);
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st7789_deselect(dev->spi);
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}
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/****************************************************************************
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* Name: st7789_rdram
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*
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* Description:
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* Read from the driver's RAM.
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*
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****************************************************************************/
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#ifndef CONFIG_LCD_NOGETRUN
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static void st7789_rdram(FAR struct st7789_dev_s *dev,
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FAR uint16_t *buff, size_t size)
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{
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st7789_sendcmd(dev, ST7789_RAMRD);
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st7789_select(dev->spi, ST7789_BYTESPP * 8);
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SPI_RECVBLOCK(dev->spi, buff, size);
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st7789_deselect(dev->spi);
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}
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#endif
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/****************************************************************************
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* Name: st7789_fill
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*
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* Description:
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* Fill the display with the specified color.
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*
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****************************************************************************/
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static void st7789_fill(FAR struct st7789_dev_s *dev, uint16_t color)
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{
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int i;
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st7789_setarea(dev, 0, 0, ST7789_XRES - 1, ST7789_YRES - 1);
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st7789_sendcmd(dev, ST7789_RAMWR);
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st7789_select(dev->spi, ST7789_BYTESPP *8);
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for (i = 0; i < ST7789_XRES * ST7789_YRES; i++)
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{
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SPI_SEND(dev->spi, color);
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}
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st7789_deselect(dev->spi);
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}
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|
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/****************************************************************************
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* Name: st7789_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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* 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 st7789_putrun(fb_coord_t row, fb_coord_t col,
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FAR const uint8_t *buffer, size_t npixels)
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{
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FAR struct st7789_dev_s *priv = &g_lcddev;
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FAR const uint16_t *src = (FAR const uint16_t *)buffer;
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ginfo("row: %d col: %d npixels: %d\n", row, col, npixels);
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DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
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st7789_setarea(priv, col, row, col + npixels - 1, row);
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st7789_wrram(priv, src, npixels);
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return OK;
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}
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|
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/****************************************************************************
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* Name: st7789_getrun
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*
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* Description:
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* This method can be used to read a partial raster line from the LCD:
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*
|
|
* 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)
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef CONFIG_LCD_NOGETRUN
|
|
static int st7789_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
|
|
size_t npixels)
|
|
{
|
|
FAR struct st7789_dev_s *priv = &g_lcddev;
|
|
FAR uint16_t *dest = (FAR uint16_t *)buffer;
|
|
|
|
ginfo("row: %d col: %d npixels: %d\n", row, col, npixels);
|
|
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
|
|
|
|
st7789_setarea(priv, col, row, col + npixels - 1, row);
|
|
st7789_rdram(priv, dest, npixels);
|
|
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: st7789_getvideoinfo
|
|
*
|
|
* Description:
|
|
* Get information about the LCD video controller configuration.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7789_getvideoinfo(FAR struct lcd_dev_s *dev,
|
|
FAR struct fb_videoinfo_s *vinfo)
|
|
{
|
|
DEBUGASSERT(dev && vinfo);
|
|
lcdinfo("fmt: %d xres: %d yres: %d nplanes: 1\n",
|
|
ST7789_COLORFMT, ST7789_XRES, ST7789_YRES);
|
|
|
|
vinfo->fmt = ST7789_COLORFMT; /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
|
|
vinfo->xres = ST7789_XRES; /* Horizontal resolution in pixel columns */
|
|
vinfo->yres = ST7789_YRES; /* Vertical resolution in pixel rows */
|
|
vinfo->nplanes = 1; /* Number of color planes supported */
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7789_getplaneinfo
|
|
*
|
|
* Description:
|
|
* Get information about the configuration of each LCD color plane.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7789_getplaneinfo(FAR struct lcd_dev_s *dev,
|
|
unsigned int planeno,
|
|
FAR struct lcd_planeinfo_s *pinfo)
|
|
{
|
|
FAR struct st7789_dev_s *priv = (FAR struct st7789_dev_s *)dev;
|
|
|
|
DEBUGASSERT(dev && pinfo && planeno == 0);
|
|
lcdinfo("planeno: %d bpp: %d\n", planeno, ST7789_BPP);
|
|
|
|
pinfo->putrun = st7789_putrun; /* Put a run into LCD memory */
|
|
#ifndef CONFIG_LCD_NOGETRUN
|
|
pinfo->getrun = st7789_getrun; /* Get a run from LCD memory */
|
|
#endif
|
|
pinfo->buffer = (FAR uint8_t *)priv->runbuffer; /* Run scratch buffer */
|
|
pinfo->bpp = priv->bpp; /* Bits-per-pixel */
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7789_getpower
|
|
****************************************************************************/
|
|
|
|
static int st7789_getpower(FAR struct lcd_dev_s *dev)
|
|
{
|
|
FAR struct st7789_dev_s *priv = (FAR struct st7789_dev_s *)dev;
|
|
|
|
lcdinfo("power: %d\n", priv->power);
|
|
return priv->power;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7789_setpower
|
|
****************************************************************************/
|
|
|
|
static int st7789_setpower(FAR struct lcd_dev_s *dev, int power)
|
|
{
|
|
FAR struct st7789_dev_s *priv = (FAR struct st7789_dev_s *)dev;
|
|
|
|
lcdinfo("power: %d\n", power);
|
|
DEBUGASSERT((unsigned)power <= CONFIG_LCD_MAXPOWER);
|
|
|
|
/* Set new power level */
|
|
|
|
if (power > 0)
|
|
{
|
|
/* Turn on the display */
|
|
|
|
st7789_display(priv, true);
|
|
|
|
/* Save the power */
|
|
|
|
priv->power = power;
|
|
}
|
|
else
|
|
{
|
|
/* Turn off the display */
|
|
|
|
st7789_display(priv, false);
|
|
|
|
/* Save the power */
|
|
|
|
priv->power = 0;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7789_getcontrast
|
|
*
|
|
* Description:
|
|
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7789_getcontrast(FAR struct lcd_dev_s *dev)
|
|
{
|
|
lcdinfo("Not implemented\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: st7789_setcontrast
|
|
*
|
|
* Description:
|
|
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int st7789_setcontrast(FAR struct lcd_dev_s *dev,
|
|
unsigned int contrast)
|
|
{
|
|
lcdinfo("contrast: %d\n", contrast);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: st7789_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the ST7789 video hardware. The initial state of the
|
|
* LCD is fully initialized, display memory cleared, and the LCD ready
|
|
* to use, but with the power setting at 0 (full off == sleep mode).
|
|
*
|
|
* Returned Value:
|
|
*
|
|
* On success, this function returns a reference to the LCD object for
|
|
* the specified LCD. NULL is returned on any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct lcd_dev_s *st7789_lcdinitialize(FAR struct spi_dev_s *spi)
|
|
{
|
|
FAR struct st7789_dev_s *priv = &g_lcddev;
|
|
|
|
/* Initialize the driver data structure */
|
|
|
|
priv->dev.getvideoinfo = st7789_getvideoinfo;
|
|
priv->dev.getplaneinfo = st7789_getplaneinfo;
|
|
priv->dev.getpower = st7789_getpower;
|
|
priv->dev.setpower = st7789_setpower;
|
|
priv->dev.getcontrast = st7789_getcontrast;
|
|
priv->dev.setcontrast = st7789_setcontrast;
|
|
priv->spi = spi;
|
|
|
|
/* Init the hardware and clear the display */
|
|
|
|
st7789_sleep(priv, false);
|
|
st7789_bpp(priv, ST7789_BPP);
|
|
st7789_setorientation(priv);
|
|
st7789_display(priv, true);
|
|
st7789_fill(priv, 0xffff);
|
|
|
|
return &priv->dev;
|
|
}
|
|
|
|
#endif /* CONFIG_LCD_ST7789 */
|