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Adafruit_ST7735.cpp
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#include "Adafruit_ST7735.h"
#include "Adafruit_ST77xx.h"
// CONSTRUCTORS ************************************************************
/*!
@brief Instantiate Adafruit ST7735 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_ST7735::Adafruit_ST7735(int8_t cs, int8_t dc, int8_t mosi, int8_t sclk,
int8_t rst)
: Adafruit_ST77xx(ST7735_TFTWIDTH_128, ST7735_TFTHEIGHT_160, cs, dc, mosi,
sclk, rst) {}
/*!
@brief Instantiate Adafruit ST7735 driver with default hardware SPI
@param cs Chip select pin #
@param dc Data/Command pin #
@param rst Reset pin # (optional, pass -1 if unused)
*/
Adafruit_ST7735::Adafruit_ST7735(int8_t cs, int8_t dc, int8_t rst)
: Adafruit_ST77xx(ST7735_TFTWIDTH_128, ST7735_TFTHEIGHT_160, cs, dc, rst) {}
#if !defined(ESP8266)
/*!
@brief Instantiate Adafruit ST7735 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_ST7735::Adafruit_ST7735(SPIClass *spiClass, int8_t cs, int8_t dc,
int8_t rst)
: Adafruit_ST77xx(ST7735_TFTWIDTH_128, ST7735_TFTHEIGHT_160, 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
Bcmd[] = { // Init commands for 7735B screens
18, // 18 commands in list:
ST77XX_SWRESET, ST_CMD_DELAY, // 1: Software reset, no args, w/delay
50, // 50 ms delay
ST77XX_SLPOUT, ST_CMD_DELAY, // 2: Out of sleep mode, no args, w/delay
255, // 255 = max (500 ms) delay
ST77XX_COLMOD, 1+ST_CMD_DELAY, // 3: Set color mode, 1 arg + delay:
0x05, // 16-bit color
10, // 10 ms delay
ST7735_FRMCTR1, 3+ST_CMD_DELAY, // 4: Frame rate control, 3 args + delay:
0x00, // fastest refresh
0x06, // 6 lines front porch
0x03, // 3 lines back porch
10, // 10 ms delay
ST77XX_MADCTL, 1, // 5: Mem access ctl (directions), 1 arg:
0x08, // Row/col addr, bottom-top refresh
ST7735_DISSET5, 2, // 6: Display settings #5, 2 args:
0x15, // 1 clk cycle nonoverlap, 2 cycle gate
// rise, 3 cycle osc equalize
0x02, // Fix on VTL
ST7735_INVCTR, 1, // 7: Display inversion control, 1 arg:
0x0, // Line inversion
ST7735_PWCTR1, 2+ST_CMD_DELAY, // 8: Power control, 2 args + delay:
0x02, // GVDD = 4.7V
0x70, // 1.0uA
10, // 10 ms delay
ST7735_PWCTR2, 1, // 9: Power control, 1 arg, no delay:
0x05, // VGH = 14.7V, VGL = -7.35V
ST7735_PWCTR3, 2, // 10: Power control, 2 args, no delay:
0x01, // Opamp current small
0x02, // Boost frequency
ST7735_VMCTR1, 2+ST_CMD_DELAY, // 11: Power control, 2 args + delay:
0x3C, // VCOMH = 4V
0x38, // VCOML = -1.1V
10, // 10 ms delay
ST7735_PWCTR6, 2, // 12: Power control, 2 args, no delay:
0x11, 0x15,
ST7735_GMCTRP1,16, // 13: Gamma Adjustments (pos. polarity), 16 args + delay:
0x09, 0x16, 0x09, 0x20, // (Not entirely necessary, but provides
0x21, 0x1B, 0x13, 0x19, // accurate colors)
0x17, 0x15, 0x1E, 0x2B,
0x04, 0x05, 0x02, 0x0E,
ST7735_GMCTRN1,16+ST_CMD_DELAY, // 14: Gamma Adjustments (neg. polarity), 16 args + delay:
0x0B, 0x14, 0x08, 0x1E, // (Not entirely necessary, but provides
0x22, 0x1D, 0x18, 0x1E, // accurate colors)
0x1B, 0x1A, 0x24, 0x2B,
0x06, 0x06, 0x02, 0x0F,
10, // 10 ms delay
ST77XX_CASET, 4, // 15: Column addr set, 4 args, no delay:
0x00, 0x02, // XSTART = 2
0x00, 0x81, // XEND = 129
ST77XX_RASET, 4, // 16: Row addr set, 4 args, no delay:
0x00, 0x02, // XSTART = 1
0x00, 0x81, // XEND = 160
ST77XX_NORON, ST_CMD_DELAY, // 17: Normal display on, no args, w/delay
10, // 10 ms delay
ST77XX_DISPON, ST_CMD_DELAY, // 18: Main screen turn on, no args, delay
255 }, // 255 = max (500 ms) delay
Rcmd1[] = { // 7735R init, part 1 (red or green tab)
15, // 15 commands in list:
ST77XX_SWRESET, ST_CMD_DELAY, // 1: Software reset, 0 args, w/delay
150, // 150 ms delay
ST77XX_SLPOUT, ST_CMD_DELAY, // 2: Out of sleep mode, 0 args, w/delay
255, // 500 ms delay
ST7735_FRMCTR1, 3, // 3: Framerate ctrl - normal mode, 3 arg:
0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D)
ST7735_FRMCTR2, 3, // 4: Framerate ctrl - idle mode, 3 args:
0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D)
ST7735_FRMCTR3, 6, // 5: Framerate - partial mode, 6 args:
0x01, 0x2C, 0x2D, // Dot inversion mode
0x01, 0x2C, 0x2D, // Line inversion mode
ST7735_INVCTR, 1, // 6: Display inversion ctrl, 1 arg:
0x07, // No inversion
ST7735_PWCTR1, 3, // 7: Power control, 3 args, no delay:
0xA2,
0x02, // -4.6V
0x84, // AUTO mode
ST7735_PWCTR2, 1, // 8: Power control, 1 arg, no delay:
0xC5, // VGH25=2.4C VGSEL=-10 VGH=3 * AVDD
ST7735_PWCTR3, 2, // 9: Power control, 2 args, no delay:
0x0A, // Opamp current small
0x00, // Boost frequency
ST7735_PWCTR4, 2, // 10: Power control, 2 args, no delay:
0x8A, // BCLK/2,
0x2A, // opamp current small & medium low
ST7735_PWCTR5, 2, // 11: Power control, 2 args, no delay:
0x8A, 0xEE,
ST7735_VMCTR1, 1, // 12: Power control, 1 arg, no delay:
0x0E,
ST77XX_INVOFF, 0, // 13: Don't invert display, no args
ST77XX_MADCTL, 1, // 14: Mem access ctl (directions), 1 arg:
0xC8, // row/col addr, bottom-top refresh
ST77XX_COLMOD, 1, // 15: set color mode, 1 arg, no delay:
0x05 }, // 16-bit color
Rcmd2green[] = { // 7735R init, part 2 (green tab only)
2, // 2 commands in list:
ST77XX_CASET, 4, // 1: Column addr set, 4 args, no delay:
0x00, 0x02, // XSTART = 0
0x00, 0x7F+0x02, // XEND = 127
ST77XX_RASET, 4, // 2: Row addr set, 4 args, no delay:
0x00, 0x01, // XSTART = 0
0x00, 0x9F+0x01 }, // XEND = 159
Rcmd2red[] = { // 7735R init, part 2 (red tab only)
2, // 2 commands in list:
ST77XX_CASET, 4, // 1: Column addr set, 4 args, no delay:
0x00, 0x00, // XSTART = 0
0x00, 0x7F, // XEND = 127
ST77XX_RASET, 4, // 2: Row addr set, 4 args, no delay:
0x00, 0x00, // XSTART = 0
0x00, 0x9F }, // XEND = 159
Rcmd2green144[] = { // 7735R init, part 2 (green 1.44 tab)
2, // 2 commands in list:
ST77XX_CASET, 4, // 1: Column addr set, 4 args, no delay:
0x00, 0x00, // XSTART = 0
0x00, 0x7F, // XEND = 127
ST77XX_RASET, 4, // 2: Row addr set, 4 args, no delay:
0x00, 0x00, // XSTART = 0
0x00, 0x7F }, // XEND = 127
Rcmd2green160x80[] = { // 7735R init, part 2 (mini 160x80)
2, // 2 commands in list:
ST77XX_CASET, 4, // 1: Column addr set, 4 args, no delay:
0x00, 0x00, // XSTART = 0
0x00, 0x4F, // XEND = 79
ST77XX_RASET, 4, // 2: Row addr set, 4 args, no delay:
0x00, 0x00, // XSTART = 0
0x00, 0x9F }, // XEND = 159
Rcmd3[] = { // 7735R init, part 3 (red or green tab)
4, // 4 commands in list:
ST7735_GMCTRP1, 16 , // 1: Gamma Adjustments (pos. polarity), 16 args + delay:
0x02, 0x1c, 0x07, 0x12, // (Not entirely necessary, but provides
0x37, 0x32, 0x29, 0x2d, // accurate colors)
0x29, 0x25, 0x2B, 0x39,
0x00, 0x01, 0x03, 0x10,
ST7735_GMCTRN1, 16 , // 2: Gamma Adjustments (neg. polarity), 16 args + delay:
0x03, 0x1d, 0x07, 0x06, // (Not entirely necessary, but provides
0x2E, 0x2C, 0x29, 0x2D, // accurate colors)
0x2E, 0x2E, 0x37, 0x3F,
0x00, 0x00, 0x02, 0x10,
ST77XX_NORON, ST_CMD_DELAY, // 3: Normal display on, no args, w/delay
10, // 10 ms delay
ST77XX_DISPON, ST_CMD_DELAY, // 4: Main screen turn on, no args w/delay
100 }; // 100 ms delay
// clang-format on
/**************************************************************************/
/*!
@brief Initialization code common to all ST7735B displays
*/
/**************************************************************************/
void Adafruit_ST7735::initB(void) {
commonInit(Bcmd);
setRotation(0);
}
/**************************************************************************/
/*!
@brief Initialization code common to all ST7735R displays
@param options Tab color from adafruit purchase
*/
/**************************************************************************/
void Adafruit_ST7735::initR(uint8_t options) {
commonInit(Rcmd1);
if (options == INITR_GREENTAB) {
displayInit(Rcmd2green);
_colstart = 2;
_rowstart = 1;
} else if ((options == INITR_144GREENTAB) || (options == INITR_HALLOWING)) {
_height = ST7735_TFTHEIGHT_128;
_width = ST7735_TFTWIDTH_128;
displayInit(Rcmd2green144);
_colstart = 2;
_rowstart = 3; // For default rotation 0
} else if (options == INITR_MINI160x80) {
_height = ST7735_TFTWIDTH_80;
_width = ST7735_TFTHEIGHT_160;
displayInit(Rcmd2green160x80);
_colstart = 24;
_rowstart = 0;
} else {
// colstart, rowstart left at default '0' values
displayInit(Rcmd2red);
}
displayInit(Rcmd3);
// Black tab, change MADCTL color filter
if ((options == INITR_BLACKTAB) || (options == INITR_MINI160x80)) {
uint8_t data = 0xC0;
sendCommand(ST77XX_MADCTL, &data, 1);
}
if (options == INITR_HALLOWING) {
// Hallowing is simply a 1.44" green tab upside-down:
tabcolor = INITR_144GREENTAB;
setRotation(2);
} else {
tabcolor = options;
setRotation(0);
}
}
// OTHER FUNCTIONS *********************************************************
/**************************************************************************/
/*!
@brief Set origin of (0,0) and orientation of TFT display
@param m The index for rotation, from 0-3 inclusive
*/
/**************************************************************************/
void Adafruit_ST7735::setRotation(uint8_t m) {
uint8_t madctl = 0;
rotation = m & 3; // can't be higher than 3
// For ST7735 with GREEN TAB (including HalloWing)...
if ((tabcolor == INITR_144GREENTAB) || (tabcolor == INITR_HALLOWING)) {
// ..._rowstart is 3 for rotations 0&1, 1 for rotations 2&3
_rowstart = (rotation < 2) ? 3 : 1;
}
switch (rotation) {
case 0:
if ((tabcolor == INITR_BLACKTAB) || (tabcolor == INITR_MINI160x80)) {
madctl = ST77XX_MADCTL_MX | ST77XX_MADCTL_MY | ST77XX_MADCTL_RGB;
} else {
madctl = ST77XX_MADCTL_MX | ST77XX_MADCTL_MY | ST7735_MADCTL_BGR;
}
if (tabcolor == INITR_144GREENTAB) {
_height = ST7735_TFTHEIGHT_128;
_width = ST7735_TFTWIDTH_128;
} else if (tabcolor == INITR_MINI160x80) {
_height = ST7735_TFTHEIGHT_160;
_width = ST7735_TFTWIDTH_80;
} else {
_height = ST7735_TFTHEIGHT_160;
_width = ST7735_TFTWIDTH_128;
}
_xstart = _colstart;
_ystart = _rowstart;
break;
case 1:
if ((tabcolor == INITR_BLACKTAB) || (tabcolor == INITR_MINI160x80)) {
madctl = ST77XX_MADCTL_MY | ST77XX_MADCTL_MV | ST77XX_MADCTL_RGB;
} else {
madctl = ST77XX_MADCTL_MY | ST77XX_MADCTL_MV | ST7735_MADCTL_BGR;
}
if (tabcolor == INITR_144GREENTAB) {
_width = ST7735_TFTHEIGHT_128;
_height = ST7735_TFTWIDTH_128;
} else if (tabcolor == INITR_MINI160x80) {
_width = ST7735_TFTHEIGHT_160;
_height = ST7735_TFTWIDTH_80;
} else {
_width = ST7735_TFTHEIGHT_160;
_height = ST7735_TFTWIDTH_128;
}
_ystart = _colstart;
_xstart = _rowstart;
break;
case 2:
if ((tabcolor == INITR_BLACKTAB) || (tabcolor == INITR_MINI160x80)) {
madctl = ST77XX_MADCTL_RGB;
} else {
madctl = ST7735_MADCTL_BGR;
}
if (tabcolor == INITR_144GREENTAB) {
_height = ST7735_TFTHEIGHT_128;
_width = ST7735_TFTWIDTH_128;
} else if (tabcolor == INITR_MINI160x80) {
_height = ST7735_TFTHEIGHT_160;
_width = ST7735_TFTWIDTH_80;
} else {
_height = ST7735_TFTHEIGHT_160;
_width = ST7735_TFTWIDTH_128;
}
_xstart = _colstart;
_ystart = _rowstart;
break;
case 3:
if ((tabcolor == INITR_BLACKTAB) || (tabcolor == INITR_MINI160x80)) {
madctl = ST77XX_MADCTL_MX | ST77XX_MADCTL_MV | ST77XX_MADCTL_RGB;
} else {
madctl = ST77XX_MADCTL_MX | ST77XX_MADCTL_MV | ST7735_MADCTL_BGR;
}
if (tabcolor == INITR_144GREENTAB) {
_width = ST7735_TFTHEIGHT_128;
_height = ST7735_TFTWIDTH_128;
} else if (tabcolor == INITR_MINI160x80) {
_width = ST7735_TFTHEIGHT_160;
_height = ST7735_TFTWIDTH_80;
} else {
_width = ST7735_TFTHEIGHT_160;
_height = ST7735_TFTWIDTH_128;
}
_ystart = _colstart;
_xstart = _rowstart;
break;
}
sendCommand(ST77XX_MADCTL, &madctl, 1);
}