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Added support for ST7735S vscrolling & 160x80 BGR display #126

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Added support for ST7735S vscrolling & 160x80 BGR display #126

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f19dda5
Added support for ST7735S vscrolling & 160x80 BGR display
nekuneko Jul 6, 2020
2e8c219
Added hardware vscroll test for ST7735S displays
nekuneko Jul 6, 2020
d415a73
Update st7735s_vscrolltest.ino
nekuneko Jul 6, 2020
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72 changes: 65 additions & 7 deletions Adafruit_ST7735.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -181,6 +181,16 @@ static const uint8_t PROGMEM
0x00, 0x00, // XSTART = 0
0x00, 0x9F }, // XEND = 159

Rcmd2green160x80bgr[] = { // 7735S init, part 2 (mini 160x80 bgr)
3, // 3 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
ST77XX_INVON, 0 }, // 3: Invert display, no args

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:
Expand Down Expand Up @@ -234,6 +244,12 @@ void Adafruit_ST7735::initR(uint8_t options) {
displayInit(Rcmd2green160x80);
_colstart = 24;
_rowstart = 0;
} else if (options == INITR_MINI160x80BGR) {
_height = ST7735_TFTHEIGHT_160;
_width = ST7735_TFTWIDTH_80;
displayInit(Rcmd2green160x80bgr);
_colstart = 26;
_rowstart = 1;
} else {
// colstart, rowstart left at default '0' values
displayInit(Rcmd2red);
Expand All @@ -242,10 +258,16 @@ void Adafruit_ST7735::initR(uint8_t options) {

// Black tab, change MADCTL color filter
if ((options == INITR_BLACKTAB) || (options == INITR_MINI160x80)) {
uint8_t data = 0xC0;
sendCommand(ST77XX_MADCTL, &data, 1);
madctl = 0xC0;
sendCommand(ST77XX_MADCTL, &madctl, 1);
}

if (options == INITR_MINI160x80BGR)
{
invertOnCommand = ST77XX_INVOFF;
invertOffCommand = ST77XX_INVON;
}

if (options == INITR_HALLOWING) {
// Hallowing is simply a 1.44" green tab upside-down:
tabcolor = INITR_144GREENTAB;
Expand All @@ -265,7 +287,6 @@ void Adafruit_ST7735::initR(uint8_t options) {
*/
/**************************************************************************/
void Adafruit_ST7735::setRotation(uint8_t m) {
uint8_t madctl = 0;

rotation = m & 3; // can't be higher than 3

Expand All @@ -286,7 +307,7 @@ void Adafruit_ST7735::setRotation(uint8_t m) {
if (tabcolor == INITR_144GREENTAB) {
_height = ST7735_TFTHEIGHT_128;
_width = ST7735_TFTWIDTH_128;
} else if (tabcolor == INITR_MINI160x80) {
} else if (tabcolor == INITR_MINI160x80 || tabcolor == INITR_MINI160x80BGR) {
_height = ST7735_TFTHEIGHT_160;
_width = ST7735_TFTWIDTH_80;
} else {
Expand All @@ -306,7 +327,7 @@ void Adafruit_ST7735::setRotation(uint8_t m) {
if (tabcolor == INITR_144GREENTAB) {
_width = ST7735_TFTHEIGHT_128;
_height = ST7735_TFTWIDTH_128;
} else if (tabcolor == INITR_MINI160x80) {
} else if (tabcolor == INITR_MINI160x80 || tabcolor == INITR_MINI160x80BGR) {
_width = ST7735_TFTHEIGHT_160;
_height = ST7735_TFTWIDTH_80;
} else {
Expand All @@ -326,7 +347,7 @@ void Adafruit_ST7735::setRotation(uint8_t m) {
if (tabcolor == INITR_144GREENTAB) {
_height = ST7735_TFTHEIGHT_128;
_width = ST7735_TFTWIDTH_128;
} else if (tabcolor == INITR_MINI160x80) {
} else if (tabcolor == INITR_MINI160x80 || tabcolor == INITR_MINI160x80BGR) {
_height = ST7735_TFTHEIGHT_160;
_width = ST7735_TFTWIDTH_80;
} else {
Expand All @@ -346,7 +367,7 @@ void Adafruit_ST7735::setRotation(uint8_t m) {
if (tabcolor == INITR_144GREENTAB) {
_width = ST7735_TFTHEIGHT_128;
_height = ST7735_TFTWIDTH_128;
} else if (tabcolor == INITR_MINI160x80) {
} else if (tabcolor == INITR_MINI160x80 || tabcolor == INITR_MINI160x80BGR) {
_width = ST7735_TFTHEIGHT_160;
_height = ST7735_TFTWIDTH_80;
} else {
Expand All @@ -360,3 +381,40 @@ void Adafruit_ST7735::setRotation(uint8_t m) {

sendCommand(ST77XX_MADCTL, &madctl, 1);
}


/**************************************************************************/
/*!
@brief Only for ST7735S. Sets Vertical Scrolling Area basic config, VSA must be within TFA and BFA.
@param top_fix_height TFA Top Fixed Area in pixels, >= 1
@param bottom_fix_height BFA Bottom Fixed Area in pixels, >=1
@param bottom_to_top Scroll direction
*/
/**************************************************************************/
void Adafruit_ST7735::setVerticalScrollConfig(uint8_t top_fix_height, uint8_t bottom_fix_height, bool bottom_to_top) {
uint8_t scroll_height;
scroll_height = _height - top_fix_height - bottom_fix_height; // TFA + VSA + BFA = 162

uint8_t args [6] = {0x00, top_fix_height, 0x00, scroll_height, 0x00, bottom_fix_height};
sendCommand(ST7735_SCRLAR, args, 6);

if(bottom_to_top)
madctl |= ST77XX_MADCTL_ML; // sets ML bit = 1
else
madctl &= ~ST77XX_MADCTL_ML; // sets ML bit = 0

sendCommand(ST77XX_MADCTL, &madctl, 1);
}


/**************************************************************************/
/*!
@brief Only for ST7735S. Sets Vertical Scroll Pointer, vsp must be within TFA and BFA.
@param vsp Vertical Scroll Pointer
*/
/**************************************************************************/
void Adafruit_ST7735::setVerticalScrollPointer(uint8_t vsp) {
uint8_t args[2] = {0x00, vsp};
sendCommand(ST7735_VSCSAD, args, 2);
}

9 changes: 9 additions & 0 deletions Adafruit_ST7735.h
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
#define INITR_144GREENTAB 0x01
#define INITR_MINI160x80 0x04
#define INITR_HALLOWING 0x05
#define INITR_MINI160x80BGR 0x06 // ST7735S

// Some register settings
#define ST7735_MADCTL_BGR 0x08
Expand All @@ -36,6 +37,10 @@
#define ST7735_GMCTRP1 0xE0
#define ST7735_GMCTRN1 0xE1

// Vertical Scrolling
#define ST7735_SCRLAR 0x33
#define ST7735_VSCSAD 0x37

// Some ready-made 16-bit ('565') color settings:
#define ST7735_BLACK ST77XX_BLACK
#define ST7735_WHITE ST77XX_WHITE
Expand Down Expand Up @@ -63,8 +68,12 @@ class Adafruit_ST7735 : public Adafruit_ST77xx {

void setRotation(uint8_t m);

void setVerticalScrollConfig(uint8_t top_fix_height = 1, uint8_t bottom_fix_height = 1, bool bottom_to_top = true);
void setVerticalScrollPointer(uint8_t vsp);

private:
uint8_t tabcolor;
uint8_t madctl;
};

#endif // _ADAFRUIT_ST7735H_
Empty file added examples/st7735s_vscrolltest/.cpb.test.skip
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