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lcd/st7789: X/Y offset and screen orientation support

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This commit is contained in:
Yuichi Nakamura 2021-03-16 00:32:54 +09:00 committed by Alan Carvalho de Assis
parent f8d56b9da2
commit aa718dcbac
3 changed files with 59 additions and 4 deletions
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12
drivers/lcd/Kconfig
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@ -607,6 +607,18 @@ if LCD_ST7789
---help---
Specifies the Y resolution of the LCD.
config LCD_ST7789_XOFFSET
int "ST7789 X Offset"
default 0
---help---
Specifies the X offset of the LCD.
config LCD_ST7789_YOFFSET
int "ST7789 Y Offset"
default 0
---help---
Specifies the Y offset of the LCD.
config LCD_ST7789_BPP
int "Bit Per Pixel (12 or 16)"
default 16

50
drivers/lcd/st7789.c
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@ -106,9 +106,13 @@
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
# define ST7789_XRES CONFIG_LCD_ST7789_YRES
# define ST7789_YRES CONFIG_LCD_ST7789_XRES
# define ST7789_XOFFSET CONFIG_LCD_ST7789_YOFFSET
# define ST7789_YOFFSET CONFIG_LCD_ST7789_XOFFSET
#else
# define ST7789_XRES CONFIG_LCD_ST7789_XRES
# define ST7789_YRES CONFIG_LCD_ST7789_YRES
# define ST7789_XOFFSET CONFIG_LCD_ST7789_XOFFSET
# define ST7789_YOFFSET CONFIG_LCD_ST7789_YOFFSET
#endif
/* Color depth and format */
@ -174,6 +178,7 @@ static void st7789_deselect(FAR struct spi_dev_s *spi);
static inline void st7789_sendcmd(FAR struct st7789_dev_s *dev, uint8_t cmd);
static void st7789_sleep(FAR struct st7789_dev_s *dev, bool sleep);
static void st7789_setorientation(FAR struct st7789_dev_s *dev);
static void st7789_display(FAR struct st7789_dev_s *dev, bool on);
static void st7789_setarea(FAR struct st7789_dev_s *dev,
uint16_t x0, uint16_t y0,
@ -326,6 +331,42 @@ static void st7789_display(FAR struct st7789_dev_s *dev, bool on)
st7789_sendcmd(dev, ST7789_INVON);
}
/****************************************************************************
* Name: st7789_setorientation
*
* Description:
* Set screen orientation.
*
****************************************************************************/
static void st7789_setorientation(FAR struct st7789_dev_s *dev)
{
/* No need to change the orientation in PORTRAIT mode */
#if !defined(CONFIG_LCD_PORTRAIT)
st7789_sendcmd(dev, ST7789_MADCTL);
st7789_select(dev->spi, 8);
# if defined(CONFIG_LCD_RLANDSCAPE)
/* RLANDSCAPE : MY=1 MV=1 */
SPI_SEND(dev->spi, 0xa0);
# elif defined(CONFIG_LCD_LANDSCAPE)
/* LANDSCAPE : MX=1 MV=1 */
SPI_SEND(dev->spi, 0x70);
# elif defined(CONFIG_LCD_RPORTRAIT)
/* RPORTRAIT : MX=1 MY=1 */
SPI_SEND(dev->spi, 0xc0);
# endif
st7789_deselect(dev->spi);
#endif
}
/****************************************************************************
* Name: st7789_setarea
*
@ -342,16 +383,16 @@ static void st7789_setarea(FAR struct st7789_dev_s *dev,
st7789_sendcmd(dev, ST7789_RASET);
st7789_select(dev->spi, 16);
SPI_SEND(dev->spi, y0);
SPI_SEND(dev->spi, y1);
SPI_SEND(dev->spi, y0 + ST7789_YOFFSET);
SPI_SEND(dev->spi, y1 + ST7789_YOFFSET);
st7789_deselect(dev->spi);
/* Set column address */
st7789_sendcmd(dev, ST7789_CASET);
st7789_select(dev->spi, 16);
SPI_SEND(dev->spi, x0);
SPI_SEND(dev->spi, x1);
SPI_SEND(dev->spi, x0 + ST7789_XOFFSET);
SPI_SEND(dev->spi, x1 + ST7789_XOFFSET);
st7789_deselect(dev->spi);
}
@ -671,6 +712,7 @@ FAR struct lcd_dev_s *st7789_lcdinitialize(FAR struct spi_dev_s *spi)
st7789_sleep(priv, false);
st7789_bpp(priv, ST7789_BPP);
st7789_setorientation(priv);
st7789_display(priv, true);
st7789_fill(priv, 0xffff);

1
drivers/lcd/st7789.h
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@ -46,6 +46,7 @@
#define ST7789_RASET 0x2b /* Row Address Set */
#define ST7789_RAMWR 0x2c /* Memory Write */
#define ST7789_RAMRD 0x2e /* Memory Read */
#define ST7789_MADCTL 0x36 /* Memory Data Access Control */
#define ST7789_IDMOFF 0x38 /* Idle Mode Off */
#define ST7789_IDMON 0x39 /* Idle Mode On */
#define ST7789_COLMOD 0x3a /* Interface Pixel Format */