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Adafruit_ST7789.cpp
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#include "Adafruit_ST7789.h"
#include "Adafruit_ST77xx.h"
// CONSTRUCTORS ************************************************************
/*!
@brief Instantiate Adafruit ST7789 driver with software SPI
@param cs Chip select pin #
@param dc Data/Command pin #
@param mosi SPI MOSI pin #
@param sclk SPI Clock pin #
@param rst Reset pin # (optional, pass -1 if unused)
*/
Adafruit_ST7789::Adafruit_ST7789(int8_t cs, int8_t dc, int8_t mosi, int8_t sclk,
int8_t rst)
: Adafruit_ST77xx(240, 320, cs, dc, mosi, sclk, rst) {}
/*!
@brief Instantiate Adafruit ST7789 driver with hardware SPI
@param cs Chip select pin #
@param dc Data/Command pin #
@param rst Reset pin # (optional, pass -1 if unused)
*/
Adafruit_ST7789::Adafruit_ST7789(int8_t cs, int8_t dc, int8_t rst)
: Adafruit_ST77xx(240, 320, cs, dc, rst) {}
#if !defined(ESP8266)
/*!
@brief Instantiate Adafruit ST7789 driver with selectable hardware SPI
@param spiClass Pointer to an SPI device to use (e.g. &SPI1)
@param cs Chip select pin #
@param dc Data/Command pin #
@param rst Reset pin # (optional, pass -1 if unused)
*/
Adafruit_ST7789::Adafruit_ST7789(SPIClass *spiClass, int8_t cs, int8_t dc,
int8_t rst)
: Adafruit_ST77xx(240, 320, spiClass, cs, dc, rst) {}
#endif // end !ESP8266
// SCREEN INITIALIZATION ***************************************************
// Rather than a bazillion writecommand() and writedata() calls, screen
// initialization commands and arguments are organized in these tables
// stored in PROGMEM. The table may look bulky, but that's mostly the
// formatting -- storage-wise this is hundreds of bytes more compact
// than the equivalent code. Companion function follows.
// clang-format off
static const uint8_t PROGMEM
generic_st7789[] = { // Init commands for 7789 screens
9, // 9 commands in list:
ST77XX_SWRESET, ST_CMD_DELAY, // 1: Software reset, no args, w/delay
150, // ~150 ms delay
ST77XX_SLPOUT , ST_CMD_DELAY, // 2: Out of sleep mode, no args, w/delay
10, // 10 ms delay
ST77XX_COLMOD , 1+ST_CMD_DELAY, // 3: Set color mode, 1 arg + delay:
0x55, // 16-bit color
10, // 10 ms delay
ST77XX_MADCTL , 1, // 4: Mem access ctrl (directions), 1 arg:
0x08, // Row/col addr, bottom-top refresh
ST77XX_CASET , 4, // 5: Column addr set, 4 args, no delay:
0x00,
0, // XSTART = 0
0,
240, // XEND = 240
ST77XX_RASET , 4, // 6: Row addr set, 4 args, no delay:
0x00,
0, // YSTART = 0
320>>8,
320&0xFF, // YEND = 320
ST77XX_INVON , ST_CMD_DELAY, // 7: hack
10,
ST77XX_NORON , ST_CMD_DELAY, // 8: Normal display on, no args, w/delay
10, // 10 ms delay
ST77XX_DISPON , ST_CMD_DELAY, // 9: Main screen turn on, no args, delay
10 }; // 10 ms delay
// clang-format on
/**************************************************************************/
/*!
@brief Initialization code common to all ST7789 displays
@param width Display width
@param height Display height
@param mode SPI data mode; one of SPI_MODE0, SPI_MODE1, SPI_MODE2
or SPI_MODE3 (do NOT pass the numbers 0,1,2 or 3 -- use
the defines only, the values are NOT the same!)
*/
/**************************************************************************/
void Adafruit_ST7789::init(uint16_t width, uint16_t height, uint8_t mode) {
// Save SPI data mode. commonInit() calls begin() (in Adafruit_ST77xx.cpp),
// which in turn calls initSPI() (in Adafruit_SPITFT.cpp), passing it the
// value of spiMode. It's done this way because begin() really should not
// be modified at this point to accept an SPI mode -- it's a virtual
// function required in every Adafruit_SPITFT subclass and would require
// updating EVERY such library...whereas, at the moment, we know that
// certain ST7789 displays are the only thing that may need a non-default
// SPI mode, hence this roundabout approach...
spiMode = mode;
// (Might get added similarly to other display types as needed on a
// case-by-case basis.)
commonInit(NULL);
if (width < 240) {
// 1.14" display
_rowstart = _rowstart2 = (int)((320 - height + 1) / 2);
_colstart = (int)((240 - width + 1) / 2);
_colstart2 = (int)((240 - width) / 2);
} else if (width == 240 && height == 280) {
// 1.69" display
_rowstart = 20;
_rowstart2 = 0;
_colstart = _colstart2 = 0;
} else {
// 1.3", 1.54", and 2.0" displays
_rowstart = (320 - height);
_rowstart2 = 0;
_colstart = _colstart2 = (240 - width);
}
windowWidth = width;
windowHeight = height;
displayInit(generic_st7789);
setRotation(0);
}
/**************************************************************************/
/*!
@brief Set origin of (0,0) and orientation of TFT display
@param m The index for rotation, from 0-3 inclusive
*/
/**************************************************************************/
void Adafruit_ST7789::setRotation(uint8_t m) {
uint8_t madctl = 0;
rotation = m & 3; // can't be higher than 3
switch (rotation) {
case 0:
madctl = ST77XX_MADCTL_MX | ST77XX_MADCTL_MY | ST77XX_MADCTL_RGB;
_xstart = _colstart;
_ystart = _rowstart;
_width = windowWidth;
_height = windowHeight;
break;
case 1:
madctl = ST77XX_MADCTL_MY | ST77XX_MADCTL_MV | ST77XX_MADCTL_RGB;
_xstart = _rowstart;
_ystart = _colstart;
_height = windowWidth;
_width = windowHeight;
break;
case 2:
madctl = ST77XX_MADCTL_RGB;
_xstart = _colstart2;
_ystart = _rowstart2;
_width = windowWidth;
_height = windowHeight;
break;
case 3:
madctl = ST77XX_MADCTL_MX | ST77XX_MADCTL_MV | ST77XX_MADCTL_RGB;
_xstart = _rowstart2;
_ystart = _colstart2;
_height = windowWidth;
_width = windowHeight;
break;
}
sendCommand(ST77XX_MADCTL, &madctl, 1);
}