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Added support for ST7735R init code and differentiated between R and B
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@ladyada
ladyada committed May 11, 2011
1 parent 3597c80 commit 14d2c0e
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Showing 2 changed files with 171 additions and 7 deletions.
167 changes: 163 additions & 4 deletions ST7735.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,8 @@ ST7735::ST7735(uint8_t cs, uint8_t rs, uint8_t rst) {

inline void ST7735::spiwrite(uint8_t c) {

//Serial.println(c, HEX);

if (!_sid) {
SPI.transfer(c);
return;
Expand All @@ -46,9 +48,11 @@ inline void ST7735::spiwrite(uint8_t c) {

if (c & _BV(i)) {
*sidportreg |= sidpin;
//digitalWrite(_sid, HIGH);
//SID_PORT |= _BV(SID);
} else {
*sidportreg &= ~sidpin;
//digitalWrite(_sid, LOW);
//SID_PORT &= ~_BV(SID);
}

Expand All @@ -65,6 +69,7 @@ void ST7735::writecommand(uint8_t c) {
*portOutputRegister(csport) &= ~ cspin;
//digitalWrite(_cs, LOW);

//Serial.print("C ");
spiwrite(c);

*portOutputRegister(csport) |= cspin;
Expand All @@ -79,6 +84,7 @@ void ST7735::writedata(uint8_t c) {
*portOutputRegister(csport) &= ~ cspin;
//digitalWrite(_cs, LOW);

//Serial.print("D ");
spiwrite(c);

*portOutputRegister(csport) |= cspin;
Expand Down Expand Up @@ -147,7 +153,7 @@ void ST7735::fillScreen(uint16_t color) {
*portOutputRegister(csport) |= cspin;
}

void ST7735::init(void) {
void ST7735::initB(void) {
// set pin directions
pinMode(_rs, OUTPUT);

Expand Down Expand Up @@ -284,6 +290,154 @@ void ST7735::init(void) {
delay(500);
}



void ST7735::initR(void) {
// set pin directions
pinMode(_rs, OUTPUT);

if (_sclk) {
pinMode(_sclk, OUTPUT);
sclkport = digitalPinToPort(_sclk);
sclkpin = digitalPinToBitMask(_sclk);

pinMode(_sid, OUTPUT);
sidport = digitalPinToPort(_sid);
sidpin = digitalPinToBitMask(_sid);
} else {
// using the hardware SPI
SPI.begin();
SPI.setDataMode(SPI_MODE3);
}
// toggle RST low to reset; CS low so it'll listen to us
pinMode(_cs, OUTPUT);
digitalWrite(_cs, LOW);
cspin = digitalPinToBitMask(_cs);
csport = digitalPinToPort(_cs);

rspin = digitalPinToBitMask(_rs);
rsport = digitalPinToPort(_rs);

if (_rst) {
pinMode(_rst, OUTPUT);
digitalWrite(_rst, HIGH);
delay(500);
digitalWrite(_rst, LOW);
delay(500);
digitalWrite(_rst, HIGH);
delay(500);
}

writecommand(ST7735_SWRESET); // software reset
delay(150);

writecommand(ST7735_SLPOUT); // out of sleep mode
delay(500);

writecommand(ST7735_FRMCTR1); // frame rate control - normal mode
writedata(0x01); // frame rate = fosc / (1 x 2 + 40) * (LINE + 2C + 2D)
writedata(0x2C);
writedata(0x2D);

writecommand(ST7735_FRMCTR2); // frame rate control - idle mode
writedata(0x01); // frame rate = fosc / (1 x 2 + 40) * (LINE + 2C + 2D)
writedata(0x2C);
writedata(0x2D);

writecommand(ST7735_FRMCTR3); // frame rate control - partial mode
writedata(0x01); // dot inversion mode
writedata(0x2C);
writedata(0x2D);
writedata(0x01); // line inversion mode
writedata(0x2C);
writedata(0x2D);

writecommand(ST7735_INVCTR); // display inversion control
writedata(0x07); // no inversion

writecommand(ST7735_PWCTR1); // power control
writedata(0x50); // AVDD = 4.7V, VRHP = 3.9
writedata(0x02); // -4.6V
writedata(0x84); // AUTO mode

writecommand(ST7735_PWCTR2); // power control
writedata(0xC5); // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD

writecommand(ST7735_PWCTR3); // power control
writedata(0x0A); // Opamp current small
writedata(0x00); // Boost frequency

writecommand(ST7735_PWCTR4); // power control
writedata(0x8A); // BCLK/2, Opamp current small & Medium low
writedata(0xEE); // BLCK/4, BCLK/2, BLCK/4, BCLK/2

writecommand(ST7735_INVOFF); // don't invert display

writecommand(ST7735_VMCTR1); // power control
writedata(0x26); // VCOM = -1.375V

writecommand(ST7735_MADCTL); // memory access control (directions)
writedata(0xC8); // row address/col address, bottom to top refresh
madctl = 0xC8;

writecommand(ST7735_COLMOD); // set color mode
writedata(0x05); // 16-bit color

writecommand(ST7735_CASET); // column addr set
writedata(0x00);
writedata(0x00); // XSTART = 0
writedata(0x00);
writedata(0x7F); // XEND = 127

writecommand(ST7735_RASET); // row addr set
writedata(0x00);
writedata(0x00); // XSTART = 0
writedata(0x00);
writedata(0x9F); // XEND = 159

writecommand(ST7735_GMCTRP1);
writedata(0x09);
writedata(0x16);
writedata(0x09);
writedata(0x20);
writedata(0x21);
writedata(0x1B);
writedata(0x13);
writedata(0x19);
writedata(0x17);
writedata(0x15);
writedata(0x1E);
writedata(0x2B);
writedata(0x04);
writedata(0x05);
writedata(0x02);
writedata(0x0E);
writecommand(ST7735_GMCTRN1);
writedata(0x0B);
writedata(0x14);
writedata(0x08);
writedata(0x1E);
writedata(0x22);
writedata(0x1D);
writedata(0x18);
writedata(0x1E);
writedata(0x1B);
writedata(0x1A);
writedata(0x24);
writedata(0x2B);
writedata(0x06);
writedata(0x06);
writedata(0x02);
writedata(0x0F);

writecommand(ST7735_DISPON);
delay(100);

writecommand(ST7735_NORON); // normal display on
delay(10);
}


// draw a string from memory

void ST7735::drawString(uint8_t x, uint8_t y, char *c,
Expand Down Expand Up @@ -497,8 +651,7 @@ void ST7735::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1,


//////////

/*
/*
uint8_t ST7735::spiread(void) {
uint8_t r = 0;
if (_sid > 0) {
Expand All @@ -518,7 +671,7 @@ uint8_t ST7735::spiread(void) {
return r;
}
void ST7735::writecommand(uint8_t c) {
void ST7735::dummyclock(void) {
Expand Down Expand Up @@ -549,9 +702,14 @@ uint8_t ST7735::readcommand8(uint8_t c) {
*portOutputRegister(csport) &= ~ cspin;
spiwrite(c);
digitalWrite(_rs, HIGH);
pinMode(_sid, INPUT); // input!
digitalWrite(_sid, LOW); // low
spiread();
uint8_t r = spiread();
*portOutputRegister(csport) |= cspin;
Expand Down Expand Up @@ -600,4 +758,5 @@ uint32_t ST7735::readcommand32(uint8_t c) {
pinMode(_sid, OUTPUT); // back to output
return r;
}
*/
11 changes: 8 additions & 3 deletions ST7735.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -27,13 +27,17 @@
#define ST7735_COLMOD 0x3A
#define ST7735_MADCTL 0x36


#define ST7735_FRMCTR1 0xB1
#define ST7735_FRMCTR2 0xB2
#define ST7735_FRMCTR3 0xB3
#define ST7735_INVCTR 0xB4
#define ST7735_DISSET5 0xB6

#define ST7735_PWCTR1 0xC0
#define ST7735_PWCTR2 0xC1
#define ST7735_PWCTR3 0xC2
#define ST7735_PWCTR4 0xC3
#define ST7735_VMCTR1 0xC5

#define ST7735_RDID1 0xDA
Expand All @@ -52,7 +56,8 @@ class ST7735 {
ST7735(uint8_t CS, uint8_t RS, uint8_t SID,
uint8_t SCLK, uint8_t RST);
ST7735(uint8_t CS, uint8_t RS, uint8_t RST);
void init(void);
void initB(void);
void initR(void);

// drawing primitives!
void pushColor(uint16_t color);
Expand Down Expand Up @@ -89,8 +94,8 @@ class ST7735 {
void dummyclock(void);
void writecommand(uint8_t);
void writedata(uint8_t);

/* these are not for use, 8-bit protocol only!
/*
// these are not for use, 8-bit protocol only!
uint8_t readdata(void);
uint8_t readcommand8(uint8_t);
uint16_t readcommand16(uint8_t);
Expand Down

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