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nuttx/drivers/lcd/gc9a01.c
Tiago Medicci Serrano ab60d0d3fb Framebuffer's callback buffer starts from the area being drawn. 
The commit 664d45dcba updated the
behavior of the framebuffer's putarea callback enabling it to be
used to draw a particular area of the display. Previously, putarea
was only used to draw the entire area of the display. Any different
area was drawn, row by row, by putrun. Also, before checking for
which callback to call, the framebuffer driver adjusted the buffer
reference that was going to be used for calling the driver's callback
to point to the init of the relevant data. After that commit, the
framebuffer's buffer reference passed to the driver's putarea now
contains the data to draw the entire display. Unlike the previous
version of that implementation, only the putrun's callback buffer
was being referenced from the address that contains the data that
actually is being drawn.

This commit fixes it by adjusting the reference for the run buffer
passed to the putrun/putarea callback. It always starts from the
beginning of the relevant data that is actually being drawn. That is
necessary because lcddev (which uses the same LCD display driver
callbacks) actually don't allocate a buffer containing the data to
draw the whole display, so the same putarea implementation of the
LCD drivers would'n be able to work for both lcddev and framebuffer.
Also it's necessary to pass the stride argument to the LCD drivers
in order to enable them to do partial writes by calculating the
buffer offset while sending row-by-row. The stride is equal the
width multiplied by the bytes per pixel (may add some padding)
for framebuffer and is equal to the lenght of the row being drawn
(multiplied by the same BPP) for lcddev.

Why this approach?
Other possible approaches would be:
1) modify lcddev driver to translate received buffer data to a
buffer similar to the framebuffer. That wouldn't be efficient
considering memory allocation.
2) Create a new callback function. While possible, it'd be confusing
to create a different callback to draw the whole screen and another
to draw only an area of the screen. Also, these callbacks would
differ themselves only from the way the buffer is filled.
3) Simply reverting 664d45dcba would
break the usage of the putarea callback to draw an area of the
display, which would also be inefficient.

This approach is based on the Zephyr's implementation of the ST7789
driver: the buffer starts from the beginiing of the region that would
be drawn. The display device driver's putarea implementation should
check if the operation refers to a full screen/full row and implement
(if possible) a single operation to send the data to be drawn more
efficiently.

Finally, this approach requires that the drivers which implement
the putarea callback and expects the entire framebuffer buffer
to be modified. They don't need to calculate where the data begins
as the new buffer represents the data from the address that is
actually being drawn. This includes adjusting the LCD drivers
GC9A01 and ST7789 and the driver for APA102-based LED matrix display.
2022-08-13 20:36:45 +08:00

904 lines
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/****************************************************************************
* drivers/lcd/gc9a01.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/spi/spi.h>
#include <nuttx/lcd/lcd.h>
#include <nuttx/lcd/gc9a01.h>
#include "gc9a01.h"
#ifdef CONFIG_LCD_GC9A01
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Verify that all configuration requirements have been met */
#ifndef CONFIG_LCD_GC9A01_SPIMODE
# define CONFIG_LCD_GC9A01_SPIMODE SPIDEV_MODE0
#endif
/* SPI frequency */
#ifndef CONFIG_LCD_GC9A01_FREQUENCY
# define CONFIG_LCD_GC9A01_FREQUENCY 1000000
#endif
/* Check contrast selection */
#if !defined(CONFIG_LCD_MAXCONTRAST)
# define CONFIG_LCD_MAXCONTRAST 1
#endif
/* Check power setting */
#if !defined(CONFIG_LCD_MAXPOWER) || CONFIG_LCD_MAXPOWER < 1
# define CONFIG_LCD_MAXPOWER 1
#endif
#if CONFIG_LCD_MAXPOWER > 255
# error "CONFIG_LCD_MAXPOWER must be less than 256 to fit in uint8_t"
#endif
/* Check orientation */
#if defined(CONFIG_LCD_PORTRAIT)
# if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) ||\
defined(CONFIG_LCD_RPORTRAIT)
# error "Cannot define both portrait and any other orientations"
# endif
#elif defined(CONFIG_LCD_RPORTRAIT)
# if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
# error "Cannot define both rportrait and any other orientations"
# endif
#elif defined(CONFIG_LCD_LANDSCAPE)
# ifdef CONFIG_LCD_RLANDSCAPE
# error "Cannot define both landscape and any other orientations"
# endif
#elif !defined(CONFIG_LCD_RLANDSCAPE)
# define CONFIG_LCD_LANDSCAPE 1
#endif
/* Display Resolution */
#if !defined(CONFIG_LCD_GC9A01_XRES)
# define CONFIG_LCD_GC9A01_XRES 240
#endif
#if !defined(CONFIG_LCD_GC9A01_YRES)
# define CONFIG_LCD_GC9A01_YRES 320
#endif
#define GC9A01_LUT_SIZE CONFIG_LCD_GC9A01_YRES
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
# define GC9A01_XRES CONFIG_LCD_GC9A01_YRES
# define GC9A01_YRES CONFIG_LCD_GC9A01_XRES
# define GC9A01_XOFFSET CONFIG_LCD_GC9A01_YOFFSET
# define GC9A01_YOFFSET CONFIG_LCD_GC9A01_XOFFSET
#else
# define GC9A01_XRES CONFIG_LCD_GC9A01_XRES
# define GC9A01_YRES CONFIG_LCD_GC9A01_YRES
# define GC9A01_XOFFSET CONFIG_LCD_GC9A01_XOFFSET
# define GC9A01_YOFFSET CONFIG_LCD_GC9A01_YOFFSET
#endif
/* Color depth and format */
#ifdef CONFIG_LCD_GC9A01_BPP
# if (CONFIG_LCD_GC9A01_BPP == 12)
# define GC9A01_BPP 12
# define GC9A01_COLORFMT FB_FMT_RGB12_444
# define GC9A01_BYTESPP 2
# elif (CONFIG_LCD_GC9A01_BPP == 16)
# define GC9A01_BPP 16
# define GC9A01_COLORFMT FB_FMT_RGB16_565
# define GC9A01_BYTESPP 2
# else
# define GC9A01_BPP 16
# define GC9A01_COLORFMT FB_FMT_RGB16_565
# define GC9A01_BYTESPP 2
# warning "Invalid color depth. Falling back to 16bpp"
# endif
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure describes the state of this driver */
struct gc9a01_dev_s
{
/* Publicly visible device structure */
struct lcd_dev_s dev;
/* Private LCD-specific information follows */
FAR struct spi_dev_s *spi; /* SPI device */
uint8_t bpp; /* Selected color depth */
uint8_t power; /* Current power setting */
/* 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.
*/
uint16_t runbuffer[GC9A01_LUT_SIZE];
};
/****************************************************************************
* Private Function Protototypes
****************************************************************************/
/* Misc. Helpers */
static void gc9a01_select(FAR struct spi_dev_s *spi, int bits);
static void gc9a01_deselect(FAR struct spi_dev_s *spi);
static inline void gc9a01_sendcmd(FAR struct gc9a01_dev_s *dev, uint8_t cmd);
static void gc9a01_cmddata(FAR struct gc9a01_dev_s *dev, uint8_t cmd,
const uint8_t *data, int len);
static void gc9a01_init(FAR struct gc9a01_dev_s *dev);
static void gc9a01_sleep(FAR struct gc9a01_dev_s *dev, bool sleep);
static void gc9a01_setorientation(FAR struct gc9a01_dev_s *dev);
static void gc9a01_display(FAR struct gc9a01_dev_s *dev, bool on);
static void gc9a01_setarea(FAR struct gc9a01_dev_s *dev,
uint16_t x0, uint16_t y0,
uint16_t x1, uint16_t y1);
static void gc9a01_bpp(FAR struct gc9a01_dev_s *dev, int bpp);
static void gc9a01_wrram(FAR struct gc9a01_dev_s *dev,
FAR const uint8_t *buff, size_t size , size_t skip,
size_t count);
#ifndef CONFIG_LCD_NOGETRUN
static void gc9a01_rdram(FAR struct gc9a01_dev_s *dev,
FAR uint16_t *buff, size_t size);
#endif
static void gc9a01_fill(FAR struct gc9a01_dev_s *dev, uint16_t color);
/* LCD Data Transfer Methods */
static int gc9a01_putrun(FAR struct lcd_dev_s *dev,
fb_coord_t row, fb_coord_t col,
FAR const uint8_t *buffer, size_t npixels);
static int gc9a01_putarea(FAR struct lcd_dev_s *dev,
fb_coord_t row_start, fb_coord_t row_end,
fb_coord_t col_start, fb_coord_t col_end,
FAR const uint8_t *buffer, fb_coord_t stride);
#ifndef CONFIG_LCD_NOGETRUN
static int gc9a01_getrun(FAR struct lcd_dev_s *dev,
fb_coord_t row, fb_coord_t col,
FAR uint8_t *buffer, size_t npixels);
#endif
/* LCD Configuration */
static int gc9a01_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int gc9a01_getplaneinfo(FAR struct lcd_dev_s *dev,
unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo);
/* LCD Specific Controls */
static int gc9a01_getpower(FAR struct lcd_dev_s *dev);
static int gc9a01_setpower(FAR struct lcd_dev_s *dev, int power);
static int gc9a01_getcontrast(FAR struct lcd_dev_s *dev);
static int gc9a01_setcontrast(FAR struct lcd_dev_s *dev,
unsigned int contrast);
/****************************************************************************
* Private Data
****************************************************************************/
static struct gc9a01_dev_s g_lcddev;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: gc9a01_select
*
* Description:
* Select the SPI, locking and re-configuring if necessary
*
* Input Parameters:
* spi - Reference to the SPI driver structure
* bits - Number of SPI bits
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void gc9a01_select(FAR struct spi_dev_s *spi, int bits)
{
/* Select GC9A01 chip (locking the SPI bus in case there are multiple
* devices competing for the SPI bus
*/
SPI_LOCK(spi, true);
SPI_SELECT(spi, SPIDEV_DISPLAY(0), true);
/* Now make sure that the SPI bus is configured for the GC9A01 (it
* might have gotten configured for a different device while unlocked)
*/
SPI_SETMODE(spi, CONFIG_LCD_GC9A01_SPIMODE);
SPI_SETBITS(spi, bits);
SPI_SETFREQUENCY(spi, CONFIG_LCD_GC9A01_FREQUENCY);
}
/****************************************************************************
* Name: gc9a01_deselect
*
* Description:
* De-select the SPI
*
* Input Parameters:
* spi - Reference to the SPI driver structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void gc9a01_deselect(FAR struct spi_dev_s *spi)
{
/* De-select GC9A01 chip and relinquish the SPI bus. */
SPI_SELECT(spi, SPIDEV_DISPLAY(0), false);
SPI_LOCK(spi, false);
}
/****************************************************************************
* Name: gc9a01_sendcmd
*
* Description:
* Send a command to the driver.
*
****************************************************************************/
static inline void gc9a01_sendcmd(FAR struct gc9a01_dev_s *dev, uint8_t cmd)
{
gc9a01_select(dev->spi, 8);
SPI_CMDDATA(dev->spi, SPIDEV_DISPLAY(0), true);
SPI_SEND(dev->spi, cmd);
SPI_CMDDATA(dev->spi, SPIDEV_DISPLAY(0), false);
gc9a01_deselect(dev->spi);
}
/****************************************************************************
* Name: gc9a01_cmddata
*
* Description:
* Send a command and a series of data to the driver.
*
****************************************************************************/
static void gc9a01_cmddata(FAR struct gc9a01_dev_s *dev, uint8_t cmd,
const uint8_t *data, int len)
{
gc9a01_select(dev->spi, 8);
SPI_CMDDATA(dev->spi, SPIDEV_DISPLAY(0), true);
SPI_SEND(dev->spi, cmd);
SPI_CMDDATA(dev->spi, SPIDEV_DISPLAY(0), false);
SPI_SNDBLOCK(dev->spi, data, len);
gc9a01_deselect(dev->spi);
}
/****************************************************************************
* Name: gc9a01_init
*
* Description:
* Send gc9a01 internal init commands.
*
****************************************************************************/
static void gc9a01_init(FAR struct gc9a01_dev_s *dev)
{
gc9a01_sendcmd(dev, GC9A01_SWRESET);
up_mdelay(120);
gc9a01_sendcmd(dev, GC9A01_ENIREG2);
gc9a01_cmddata(dev, 0xeb, (const uint8_t *) "\x14", 1);
gc9a01_sendcmd(dev, GC9A01_ENIREG1);
gc9a01_sendcmd(dev, GC9A01_ENIREG2);
gc9a01_cmddata(dev, 0xeb, (const uint8_t *) "\x14", 1);
gc9a01_cmddata(dev, 0x84, (const uint8_t *) "\x40", 1);
gc9a01_cmddata(dev, 0x85, (const uint8_t *) "\xFF", 1);
gc9a01_cmddata(dev, 0x86, (const uint8_t *) "\xFF", 1);
gc9a01_cmddata(dev, 0x87, (const uint8_t *) "\xFF", 1);
gc9a01_cmddata(dev, 0x88, (const uint8_t *) "\x0A", 1);
gc9a01_cmddata(dev, 0x89, (const uint8_t *) "\x21", 1);
gc9a01_cmddata(dev, 0x8a, (const uint8_t *) "\x00", 1);
gc9a01_cmddata(dev, 0x8b, (const uint8_t *) "\x80", 1);
gc9a01_cmddata(dev, 0x8c, (const uint8_t *) "\x01", 1);
gc9a01_cmddata(dev, 0x8d, (const uint8_t *) "\x01", 1);
gc9a01_cmddata(dev, 0x8e, (const uint8_t *) "\xFF", 1);
gc9a01_cmddata(dev, 0x8f, (const uint8_t *) "\xFF", 1);
gc9a01_cmddata(dev, 0xb6, (const uint8_t *) "\x00\x00", 2);
gc9a01_cmddata(dev, 0x3a, (const uint8_t *) "\x55", 1);
gc9a01_cmddata(dev, 0x90, (const uint8_t *) "\x08\x08\x08\x08", 4);
gc9a01_cmddata(dev, 0xbd, (const uint8_t *) "\x06", 1);
gc9a01_cmddata(dev, 0xbc, (const uint8_t *) "\x00", 1);
gc9a01_cmddata(dev, 0xff, (const uint8_t *) "\x60\x01\x04", 3);
gc9a01_cmddata(dev, 0xc3, (const uint8_t *) "\x13", 1);
gc9a01_cmddata(dev, 0xc4, (const uint8_t *) "\x13", 1);
gc9a01_cmddata(dev, 0xc9, (const uint8_t *) "\x22", 1);
gc9a01_cmddata(dev, 0xbe, (const uint8_t *) "\x11", 1);
gc9a01_cmddata(dev, 0xe1, (const uint8_t *) "\x10\x0E", 2);
gc9a01_cmddata(dev, 0xdf, (const uint8_t *) "\x21\x0c\x02", 3);
gc9a01_cmddata(dev, 0xf0, (const uint8_t *) "\x45\x09\x08\x08\x26\x2A", 6);
gc9a01_cmddata(dev, 0xf1, (const uint8_t *) "\x43\x70\x72\x36\x37\x6F", 6);
gc9a01_cmddata(dev, 0xf2, (const uint8_t *) "\x45\x09\x08\x08\x26\x2A", 6);
gc9a01_cmddata(dev, 0xf3, (const uint8_t *) "\x43\x70\x72\x36\x37\x6F", 6);
gc9a01_cmddata(dev, 0xed, (const uint8_t *) "\x1B\x0B", 2);
gc9a01_cmddata(dev, 0xae, (const uint8_t *) "\x77", 1);
gc9a01_cmddata(dev, 0xcd, (const uint8_t *) "\x63", 1);
gc9a01_cmddata(dev, 0x70, (const uint8_t *)
"\x07\x07\x04\x0E\x0F\x09\x07\x08\x03", 9);
gc9a01_cmddata(dev, 0xe8, (const uint8_t *) "\x34", 1);
gc9a01_cmddata(dev, 0x62, (const uint8_t *)
"\x18\x0D\x71\xED\x70\x70\x18\x0F\x71\xEF\x70\x70", 12);
gc9a01_cmddata(dev, 0x63, (const uint8_t *)
"\x18\x11\x71\xF1\x70\x70\x18\x13\x71\xF3\x70\x70", 12);
gc9a01_cmddata(dev, 0x64, (const uint8_t *)
"\x28\x29\xF1\x01\xF1\x00\x07", 7);
gc9a01_cmddata(dev, 0x66, (const uint8_t *)
"\x3C\x00\xCD\x67\x45\x45\x10\x00\x00\x00", 10);
gc9a01_cmddata(dev, 0x67, (const uint8_t *)
"\x00\x3C\x00\x00\x00\x01\x54\x10\x32\x98", 10);
gc9a01_cmddata(dev, 0x74, (const uint8_t *)
"\x10\x85\x80\x00\x00\x4E\x00", 7);
gc9a01_cmddata(dev, 0x98, (const uint8_t *) "\x3e\x07", 2);
gc9a01_sendcmd(dev, GC9A01_TEON);
up_mdelay(120);
}
/****************************************************************************
* Name: gc9a01_sleep
*
* Description:
* Sleep or wake up the driver.
*
****************************************************************************/
static void gc9a01_sleep(FAR struct gc9a01_dev_s *dev, bool sleep)
{
gc9a01_sendcmd(dev, sleep ? GC9A01_SLPIN : GC9A01_SLPOUT);
up_mdelay(120);
}
/****************************************************************************
* Name: gc9a01_display
*
* Description:
* Turn on or off the display.
*
****************************************************************************/
static void gc9a01_display(FAR struct gc9a01_dev_s *dev, bool on)
{
gc9a01_sendcmd(dev, on ? GC9A01_DISPON : GC9A01_DISPOFF);
gc9a01_sendcmd(dev, GC9A01_INVON);
}
/****************************************************************************
* Name: gc9a01_setorientation
*
* Description:
* Set screen orientation.
*
****************************************************************************/
static void gc9a01_setorientation(FAR struct gc9a01_dev_s *dev)
{
uint8_t reg = GC9A01_MADCTL_MX;
gc9a01_sendcmd(dev, GC9A01_MADCTL);
gc9a01_select(dev->spi, 8);
#if !defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_GC9A01_BGR)
# if defined(CONFIG_LCD_RLANDSCAPE)
reg = GC9A01_MADCTL_MX | GC9A01_MADCTL_MY | GC9A01_MADCTL_MV;
# elif defined(CONFIG_LCD_LANDSCAPE)
reg = GC9A01_MADCTL_MV;
# elif defined(CONFIG_LCD_RPORTRAIT)
reg = GC9A01_MADCTL_MY;
# endif
# if defined(CONFIG_LCD_GC9A01_BGR)
reg |= GC9A01_MADCTL_BGR;
# endif
#endif
SPI_SEND(dev->spi, reg);
gc9a01_deselect(dev->spi);
}
/****************************************************************************
* Name: gc9a01_setarea
*
* Description:
* Set the rectangular area for an upcoming read or write from RAM.
*
****************************************************************************/
static void gc9a01_setarea(FAR struct gc9a01_dev_s *dev,
uint16_t x0, uint16_t y0,
uint16_t x1, uint16_t y1)
{
/* Set row address */
gc9a01_sendcmd(dev, GC9A01_RASET);
gc9a01_select(dev->spi, 8);
SPI_SEND(dev->spi, (y0 + GC9A01_YOFFSET) >> 8);
SPI_SEND(dev->spi, (y0 + GC9A01_YOFFSET) & 0xff);
SPI_SEND(dev->spi, (y1 + GC9A01_YOFFSET) >> 8);
SPI_SEND(dev->spi, (y1 + GC9A01_YOFFSET) & 0xff);
gc9a01_deselect(dev->spi);
/* Set column address */
gc9a01_sendcmd(dev, GC9A01_CASET);
gc9a01_select(dev->spi, 8);
SPI_SEND(dev->spi, (x0 + GC9A01_XOFFSET) >> 8);
SPI_SEND(dev->spi, (x0 + GC9A01_XOFFSET) & 0xff);
SPI_SEND(dev->spi, (x1 + GC9A01_XOFFSET) >> 8);
SPI_SEND(dev->spi, (x1 + GC9A01_XOFFSET) & 0xff);
gc9a01_deselect(dev->spi);
}
/****************************************************************************
* Name: gc9a01_bpp
*
* Description:
* Set the color depth of the device.
*
****************************************************************************/
static void gc9a01_bpp(FAR struct gc9a01_dev_s *dev, int bpp)
{
uint8_t depth;
/* Don't send any command if the depth hasn't changed. */
if (dev->bpp != bpp)
{
depth = bpp / 2 - 3;
gc9a01_sendcmd(dev, GC9A01_COLMOD);
gc9a01_select(dev->spi, 8);
SPI_SEND(dev->spi, depth);
gc9a01_deselect(dev->spi);
/* Cache the new BPP */
dev->bpp = bpp;
}
}
/****************************************************************************
* Name: gc9a01_wrram
*
* Description:
* Write to the driver's RAM. It is possible to write multiples of size
* while skipping some values.
*
****************************************************************************/
static void gc9a01_wrram(FAR struct gc9a01_dev_s *dev,
FAR const uint8_t *buff, size_t size, size_t skip,
size_t count)
{
size_t i;
gc9a01_sendcmd(dev, GC9A01_RAMWR);
gc9a01_select(dev->spi, 8);
for (i = 0; i < count; i++)
{
SPI_SNDBLOCK(dev->spi, buff + (i * (size + skip)), size);
}
gc9a01_deselect(dev->spi);
}
/****************************************************************************
* Name: gc9a01_rdram
*
* Description:
* Read from the driver's RAM.
*
****************************************************************************/
#ifndef CONFIG_LCD_NOGETRUN
static void gc9a01_rdram(FAR struct gc9a01_dev_s *dev,
FAR uint16_t *buff, size_t size)
{
gc9a01_sendcmd(dev, GC9A01_RAMRD);
gc9a01_select(dev->spi, GC9A01_BYTESPP * 8);
SPI_RECVBLOCK(dev->spi, buff, size);
gc9a01_deselect(dev->spi);
}
#endif
/****************************************************************************
* Name: gc9a01_fill
*
* Description:
* Fill the display with the specified color.
*
****************************************************************************/
static void gc9a01_fill(FAR struct gc9a01_dev_s *dev, uint16_t color)
{
int i;
gc9a01_setarea(dev, 0, 0, GC9A01_XRES - 1, GC9A01_YRES - 1);
gc9a01_sendcmd(dev, GC9A01_RAMWR);
gc9a01_select(dev->spi, GC9A01_BYTESPP *8);
for (i = 0; i < GC9A01_XRES * GC9A01_YRES; i++)
{
SPI_SEND(dev->spi, color);
}
gc9a01_deselect(dev->spi);
}
/****************************************************************************
* Name: gc9a01_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* dev - The lcd device
* 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 gc9a01_putrun(FAR struct lcd_dev_s *dev,
fb_coord_t row, fb_coord_t col,
FAR const uint8_t *buffer, size_t npixels)
{
FAR struct gc9a01_dev_s *priv = (FAR struct gc9a01_dev_s *)dev;
ginfo("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
gc9a01_setarea(priv, col, row, col + npixels - 1, row);
gc9a01_wrram(priv, buffer, npixels, 0, 1);
return OK;
}
/****************************************************************************
* Name: gc9a01_putarea
*
* Description:
* This method can be used to write a partial area to the LCD:
*
* dev - The lcd device
* row_start - Starting row to write to (range: 0 <= row < yres)
* row_end - Ending row to write to (range: row_start <= row < yres)
* col_start - Starting column to write to (range: 0 <= col <= xres)
* col_end - Ending column to write to
* (range: col_start <= col_end < xres)
* buffer - The buffer containing the area to be written to the LCD
* stride - Length of a line in bytes. This parameter may be necessary
* to allow the LCD driver to calculate the offset for partial
* writes when the buffer needs to be splited for row-by-row
* writing.
*
****************************************************************************/
static int gc9a01_putarea(FAR struct lcd_dev_s *dev,
fb_coord_t row_start, fb_coord_t row_end,
fb_coord_t col_start, fb_coord_t col_end,
FAR const uint8_t *buffer, fb_coord_t stride)
{
FAR struct gc9a01_dev_s *priv = (FAR struct gc9a01_dev_s *)dev;
size_t cols = col_end - col_start + 1;
size_t rows = row_end - row_start + 1;
size_t row_size = cols * (priv->bpp >> 3);
ginfo("row_start: %d row_end: %d col_start: %d col_end: %d\n",
row_start, row_end, col_start, col_end);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
gc9a01_setarea(priv, col_start, row_start, col_end, row_end);
/* If the stride is the same of the row, a single SPI transfer is enough.
* That is always true for lcddev. For framebuffer, that indicates a full
* screen or full row update.
*/
if (stride == row_size)
{
/* simpler case, we can just send the whole buffer */
ginfo("Using full screen/full row mode\n");
gc9a01_wrram(priv, buffer, rows * row_size, 0, 1);
}
else
{
/* We have to go row by row */
ginfo("Falling-back to row by row mode\n");
gc9a01_wrram(priv, buffer, row_size, stride - row_size, rows);
}
return OK;
}
/****************************************************************************
* Name: gc9a01_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD:
*
* dev - The lcd device
* 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 gc9a01_getrun(FAR struct lcd_dev_s *dev,
fb_coord_t row, fb_coord_t col,
FAR uint8_t *buffer, size_t npixels)
{
FAR struct gc9a01_dev_s *priv = (FAR struct gc9a01_dev_s *)dev;
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);
gc9a01_setarea(priv, col, row, col + npixels - 1, row);
gc9a01_rdram(priv, dest, npixels);
return OK;
}
#endif
/****************************************************************************
* Name: gc9a01_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
****************************************************************************/
static int gc9a01_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",
GC9A01_COLORFMT, GC9A01_XRES, GC9A01_YRES);
vinfo->fmt = GC9A01_COLORFMT; /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
vinfo->xres = GC9A01_XRES; /* Horizontal resolution in pixel columns */
vinfo->yres = GC9A01_YRES; /* Vertical resolution in pixel rows */
vinfo->nplanes = 1; /* Number of color planes supported */
return OK;
}
/****************************************************************************
* Name: gc9a01_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
****************************************************************************/
static int gc9a01_getplaneinfo(FAR struct lcd_dev_s *dev,
unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo)
{
FAR struct gc9a01_dev_s *priv = (FAR struct gc9a01_dev_s *)dev;
DEBUGASSERT(dev && pinfo && planeno == 0);
lcdinfo("planeno: %d bpp: %d\n", planeno, GC9A01_BPP);
pinfo->putrun = gc9a01_putrun; /* Put a run into LCD memory */
pinfo->putarea = gc9a01_putarea; /* Put an area into LCD */
#ifndef CONFIG_LCD_NOGETRUN
pinfo->getrun = gc9a01_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 */
pinfo->dev = dev; /* The lcd device */
return OK;
}
/****************************************************************************
* Name: gc9a01_getpower
****************************************************************************/
static int gc9a01_getpower(FAR struct lcd_dev_s *dev)
{
FAR struct gc9a01_dev_s *priv = (FAR struct gc9a01_dev_s *)dev;
lcdinfo("power: %d\n", priv->power);
return priv->power;
}
/****************************************************************************
* Name: gc9a01_setpower
****************************************************************************/
static int gc9a01_setpower(FAR struct lcd_dev_s *dev, int power)
{
FAR struct gc9a01_dev_s *priv = (FAR struct gc9a01_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 */
gc9a01_display(priv, true);
/* Save the power */
priv->power = power;
}
else
{
/* Turn off the display */
gc9a01_display(priv, false);
/* Save the power */
priv->power = 0;
}
return OK;
}
/****************************************************************************
* Name: gc9a01_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int gc9a01_getcontrast(FAR struct lcd_dev_s *dev)
{
lcdinfo("Not implemented\n");
return -ENOSYS;
}
/****************************************************************************
* Name: gc9a01_setcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int gc9a01_setcontrast(FAR struct lcd_dev_s *dev,
unsigned int contrast)
{
lcdinfo("contrast: %d\n", contrast);
return -ENOSYS;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: gc9a01_initialize
*
* Description:
* Initialize the GC9A01 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 *gc9a01_lcdinitialize(FAR struct spi_dev_s *spi)
{
FAR struct gc9a01_dev_s *priv = &g_lcddev;
/* Initialize the driver data structure */
priv->dev.getvideoinfo = gc9a01_getvideoinfo;
priv->dev.getplaneinfo = gc9a01_getplaneinfo;
priv->dev.getpower = gc9a01_getpower;
priv->dev.setpower = gc9a01_setpower;
priv->dev.getcontrast = gc9a01_getcontrast;
priv->dev.setcontrast = gc9a01_setcontrast;
priv->spi = spi;
/* Init the hardware and clear the display */
gc9a01_init(priv);
gc9a01_sleep(priv, false);
gc9a01_bpp(priv, GC9A01_BPP);
gc9a01_setorientation(priv);
gc9a01_display(priv, true);
gc9a01_fill(priv, 0xffff);
return &priv->dev;
}
#endif /* CONFIG_LCD_GC9A01 */
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