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TFTv2.cpp
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TFTv2.cpp
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/*
2012 Copyright (c) Seeed Technology Inc.
Authors: Albert.Miao & Loovee,
Visweswara R (with initializtion code from TFT vendor)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc.,51 Franklin St,Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <TFTv2.h>
#define FONT_SPACE 6
#define FONT_X 8
#define FONT_Y 8
#if defined(__LINKIT_ONE__)
uint8_t bg_buffer[153600];
#endif
void TFT::TFTinit(void) {
SPI.begin();
#if defined(__LINKIT_ONE__) || defined(ARDUINO_SAMD_VARIANT_COMPLIANCE)
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
digitalWrite(5, LOW);
digitalWrite(7, HIGH);
#elif defined(KENDRYTE_K210)
pinMode(22, OUTPUT);
pinMode(21, OUTPUT);
pinMode(35, OUTPUT);
digitalWrite(35, LOW);
digitalWrite(21, HIGH);
#elif defined(__arc__) /* Arduino101/Genuino101 specifics */
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
digitalWrite(5, LOW);
digitalWrite(7, HIGH);
#endif
TFT_CS_HIGH;
TFT_DC_HIGH;
INT8U i = 0, TFTDriver = 0;
for (i = 0; i < 3; i++) {
TFTDriver = readID();
}
delay(500);
sendCMD(0x01);
delay(200);
sendCMD(0xCF);
WRITE_DATA(0x00);
WRITE_DATA(0x8B);
WRITE_DATA(0X30);
sendCMD(0xED);
WRITE_DATA(0x67);
WRITE_DATA(0x03);
WRITE_DATA(0X12);
WRITE_DATA(0X81);
sendCMD(0xE8);
WRITE_DATA(0x85);
WRITE_DATA(0x10);
WRITE_DATA(0x7A);
sendCMD(0xCB);
WRITE_DATA(0x39);
WRITE_DATA(0x2C);
WRITE_DATA(0x00);
WRITE_DATA(0x34);
WRITE_DATA(0x02);
sendCMD(0xF7);
WRITE_DATA(0x20);
sendCMD(0xEA);
WRITE_DATA(0x00);
WRITE_DATA(0x00);
sendCMD(0xC0); /* Power control */
WRITE_DATA(0x1B); /* VRH[5:0] */
sendCMD(0xC1); /* Power control */
WRITE_DATA(0x10); /* SAP[2:0];BT[3:0] */
sendCMD(0xC5); /* VCM control */
WRITE_DATA(0x3F);
WRITE_DATA(0x3C);
sendCMD(0xC7); /* VCM control2 */
WRITE_DATA(0XB7);
sendCMD(0x36); /* Memory Access Control */
WRITE_DATA(0x08);
sendCMD(0x3A);
WRITE_DATA(0x55);
sendCMD(0xB1);
WRITE_DATA(0x00);
WRITE_DATA(0x1B);
sendCMD(0xB6); /* Display Function Control */
WRITE_DATA(0x0A);
WRITE_DATA(0xA2);
sendCMD(0xF2); /* 3Gamma Function Disable */
WRITE_DATA(0x00);
sendCMD(0x26); /* Gamma curve selected */
WRITE_DATA(0x01);
sendCMD(0xE0); /* Set Gamma */
WRITE_DATA(0x0F);
WRITE_DATA(0x2A);
WRITE_DATA(0x28);
WRITE_DATA(0x08);
WRITE_DATA(0x0E);
WRITE_DATA(0x08);
WRITE_DATA(0x54);
WRITE_DATA(0XA9);
WRITE_DATA(0x43);
WRITE_DATA(0x0A);
WRITE_DATA(0x0F);
WRITE_DATA(0x00);
WRITE_DATA(0x00);
WRITE_DATA(0x00);
WRITE_DATA(0x00);
sendCMD(0XE1); /* Set Gamma */
WRITE_DATA(0x00);
WRITE_DATA(0x15);
WRITE_DATA(0x17);
WRITE_DATA(0x07);
WRITE_DATA(0x11);
WRITE_DATA(0x06);
WRITE_DATA(0x2B);
WRITE_DATA(0x56);
WRITE_DATA(0x3C);
WRITE_DATA(0x05);
WRITE_DATA(0x10);
WRITE_DATA(0x0F);
WRITE_DATA(0x3F);
WRITE_DATA(0x3F);
WRITE_DATA(0x0F);
sendCMD(0x11); /* Exit Sleep */
delay(120);
sendCMD(0x29); /* Display on */
fillScreen();
}
INT8U TFT::readID(void) {
#if defined(__LINKIT_ONE__)
return 1;
#elif defined(__arc__) /* Arduino101/Genuino101 specifics */
return 1;
#endif
INT8U i = 0;
INT8U data[3] ;
INT8U ID[3] = {0x00, 0x93, 0x41};
INT8U ToF = 1;
for (i = 0; i < 3; i++) {
data[i] = Read_Register(0xd3, i + 1);
if (data[i] != ID[i]) {
ToF = 0;
}
}
if (!ToF) { /* data!=ID */
SERIAL.print("Read TFT ID failed, ID should be 0x09341, but read ID = 0x");
for (i = 0; i < 3; i++) {
SERIAL.print(data[i], HEX);
}
SERIAL.println();
}
return ToF;
}
void TFT::setCol(INT16U StartCol, INT16U EndCol) {
sendCMD(0x2A); /* Column Command address */
sendData(StartCol);
sendData(EndCol);
}
void TFT::setPage(INT16U StartPage, INT16U EndPage) {
sendCMD(0x2B); /* Column Command address */
sendData(StartPage);
sendData(EndPage);
}
void TFT::fillScreen(INT16U XL, INT16U XR, INT16U YU, INT16U YD, INT16U color) {
unsigned long XY = 0;
if (XL > XR) {
XL = XL ^ XR;
XR = XL ^ XR;
XL = XL ^ XR;
}
if (YU > YD) {
YU = YU ^ YD;
YD = YU ^ YD;
YU = YU ^ YD;
}
XL = constrain(XL, MIN_X, MAX_X);
XR = constrain(XR, MIN_X, MAX_X);
YU = constrain(YU, MIN_Y, MAX_Y);
YD = constrain(YD, MIN_Y, MAX_Y);
XY = (XR - XL + 1);
XY = XY * (YD - YU + 1);
Tft.setCol(XL, XR);
Tft.setPage(YU, YD);
Tft.sendCMD(0x2c);
TFT_DC_HIGH;
TFT_CS_LOW;
INT8U Hcolor = (color >> 8) & 0xff;
INT8U Lcolor = color & 0xff;
#if defined(__LINKIT_ONE__)
for (unsigned long i = 0; i < XY; i++) {
bg_buffer[2 * i] = Lcolor; //
bg_buffer[2 * i + 1] = Hcolor;
}
SPI.write(bg_buffer, 2 * XY);
#else
for (unsigned long i = 0; i < XY; i++) {
SPI.transfer(Hcolor);
SPI.transfer(Lcolor);
}
#endif
TFT_CS_HIGH;
}
void TFT::fillScreen(void) {
#if defined(__LINKIT_ONE__)
memset(bg_buffer, 0, 153600);
#endif
Tft.setCol(0, 239);
Tft.setPage(0, 319);
Tft.sendCMD(0x2c); /* start to write to display ram */
TFT_DC_HIGH;
TFT_CS_LOW;
#if defined(__LINKIT_ONE__)
SPI.write(bg_buffer, 153600);
#else
for (INT16U i = 0; i < 38400; i++) {
SPI.transfer(0);
SPI.transfer(0);
SPI.transfer(0);
SPI.transfer(0);
}
#endif
TFT_CS_HIGH;
}
void TFT::setXY(INT16U poX, INT16U poY) {
setCol(poX, poX);
setPage(poY, poY);
sendCMD(0x2c);
}
void TFT::setPixel(INT16U poX, INT16U poY, INT16U color) {
sendCMD(0x2A); /* Column Command address */
sendData(poX);
sendData(poX);
sendCMD(0x2B); /* Column Command address */
sendData(poY);
sendData(poY);
sendCMD(0x2c);
sendData(color);
}
void TFT::drawCharPortrait(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
for (int i = 0; i < FONT_X; i++) {
const INT8U temp = pgm_read_byte(&simpleFont[ascii - 0x20][i]);
for (INT8U f = 0; f < 8; f++) {
if ((temp >> f) & 0x01) {
fillRectangle(poX + i * size, poY + f * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharPortraitBackwards(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
unsigned char character[8];
for (uint8_t i = 0; i < 8; i++) {
character[7 - i] = pgm_read_byte(&simpleFont[ascii - 0x20][i]);
}
for (int i = 0; i < FONT_X; i++) {
const INT8U temp = character[i];
for (INT8U f = 0; f < 8; f++) {
if ((temp >> f) & 0x01) {
fillRectangle(poX + i * size, poY + f * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharPortraitVertical(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
unsigned char character[8];
for (uint8_t i = 0; i < 8; i++) {
character[i] = pgm_read_byte(&simpleFont[ascii - 0x20][i]);
}
unsigned char res[8];
for (uint8_t i = 0; i < 8; i++) {
int val = 0x00;
for (uint8_t j = 0; j < 8; j++) {
if ((character[i] >> j) & 0x01) {
val = val | (1 << j);
}
}
res[i] = val;
}
for (int i = 0; i < FONT_X; i++) {
const INT8U temp = res[i];
for (INT8U f = 0; f < 8; f++) {
if ((temp >> f) & 0x01) {
fillRectangle(poY + i * size, poX + f * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharPortraitUpsideDown(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
unsigned char character[8];
for (uint8_t i = 0; i < 8; i++) {
character[i] = pgm_read_byte(&simpleFont[ascii - 0x20][7 - i]);
}
unsigned char res[8];
for (uint8_t i = 0; i < 8; i++) {
int val = 0x00;
for (uint8_t j = 0; j < 8; j++) {
if ((character[j] >> i) & 0x01) {
val = val | (1 << j);
}
}
res[7 - i] = val;
}
for (int i = 0; i < FONT_X; i++) {
for (INT8U f = 0; f < 8; f++) {
if ((res[i] >> f) & 0x01) {
fillRectangle(poX + f * size, poY + i * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharPortraitUpsideDownBackwards(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
unsigned char character[8];
for (uint8_t i = 0; i < 8; i++) {
character[i] = pgm_read_byte(&simpleFont[ascii - 0x20][i]);
}
unsigned char res[8];
for (uint8_t i = 0; i < 8; i++) {
int val = 0x00;
for (uint8_t j = 0; j < 8; j++) {
if ((character[j] >> i) & 0x01) {
val = val | (1 << j);
}
}
res[7 - i] = val;
}
for (int i = 0; i < FONT_X; i++) {
for (INT8U f = 0; f < 8; f++) {
if ((res[i] >> f) & 0x01) {
fillRectangle(poX + f * size, poY + i * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharLandscape(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
unsigned char character[8];
for (uint8_t i = 0; i < 8; i++) {
character[i] = pgm_read_byte(&simpleFont[ascii - 0x20][i]);
}
unsigned char res[8];
for (uint8_t i = 0; i < 8; i++) {
int val = 0x00;
for (uint8_t j = 0; j < 8; j++) {
if ((character[j] >> i) & 0x01) {
val = val | (1 << j);
}
}
res[7 - i] = val;
}
for (int i = 0; i < FONT_Y; i++) {
for (INT8U f = 0; f < 8; f++) {
if ((res[i] >> f) & 0x01) {
fillRectangle(poY + i * size, poX + f * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharLandscapeBackwards(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
unsigned char character[8];
for (uint8_t i = 0; i < 8; i++) {
character[i] = pgm_read_byte(&simpleFont[ascii - 0x20][i]);
}
unsigned char res[8];
for (uint8_t i = 0; i < 8; i++) {
int val = 0x00;
for (uint8_t j = 0; j < 8; j++) {
if ((character[j] >> i) & 0x01) {
val = val | (1 << j);
}
}
res[i] = val;
}
for (int i = 0; i < FONT_Y; i++) {
for (INT8U f = 0; f < 8; f++) {
if ((res[i] >> f) & 0x01) {
fillRectangle(poY - i * size, poX - f * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharLandscapeUpsideDown(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
for (int i = 0; i < FONT_Y; i++) {
const INT8U temp = pgm_read_byte(&simpleFont[ascii - 0x20][7 - i]);
for (INT8U f = 0; f < 8; f++) {
if ((temp >> f) & 0x01) {
fillRectangle(poY + f * size, poX + i * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharLandscapeUpsideDownBackwards(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
unsigned char character[8];
for (uint8_t i = 0; i < 8; i++) {
character[i] = pgm_read_byte(&simpleFont[ascii - 0x20][i]);
}
unsigned char res[8];
for (uint8_t i = 0; i < 8; i++) {
int val = 0x00;
for (uint8_t j = 0; j < 8; j++) {
if ((character[j] >> i) & 0x01) {
val = val | (1 << j);
}
}
res[i] = val;
}
for (int i = 0; i < FONT_Y; i++) {
for (INT8U f = 0; f < 8; f++) {
if ((res[i] >> f) & 0x01) {
fillRectangle(poY + i * size, poX + f * size, size, size, fgcolor);
}
}
}
}
void TFT::drawCharLandscapeVertical(INT8U ascii, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
if (!((ascii >= 32) && (ascii <= 127))) {
ascii = '?';
}
unsigned char character[8];
for (uint8_t i = 0; i < 8; i++) {
character[i] = pgm_read_byte(&simpleFont[ascii - 0x20][i]);
}
unsigned char res[8];
for (uint8_t i = 0; i < 8; i++) {
int val = 0x00;
for (uint8_t j = 0; j < 8; j++) {
if ((character[j] >> i) & 0x01) {
val = val | (1 << j);
}
}
res[7 - i] = val;
}
for (int i = 0; i < FONT_Y; i++) {
for (INT8U f = 0; f < 8; f++) {
if ((res[i] >> f) & 0x01) {
fillRectangle(poX + i * size, poY + f * size, size, size, fgcolor);
}
}
}
}
void TFT::drawString(char* string, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor, TextOrientation orientation) {
void (TFT::*drawFunc)(INT8U, INT16U, INT16U, INT16U, INT16U);
uint16_t max;
switch (orientation) {
case PORTRAIT_BACKWARDS:
reverse(string);
drawFunc = &TFT::drawCharPortraitBackwards;
max = MAX_X;
break;
case PORTRAIT_UPSIDE_DOWN:
reverse(string);
drawFunc = &TFT::drawCharPortraitUpsideDown;
max = MAX_X;
break;
case PORTRAIT_UPSIDE_DOWN_BACKWARDS:
drawFunc = &TFT::drawCharPortraitUpsideDownBackwards;
max = MAX_X;
break;
case PORTRAIT_VERTICAL:
drawFunc = &TFT::drawCharPortraitVertical;
max = MAX_Y;
break;
case LANDSCAPE:
drawFunc = &TFT::drawCharLandscape;
max = MAX_Y;
break;
case LANDSCAPE_BACKWARDS:
reverse(string);
drawFunc = &TFT::drawCharLandscapeBackwards;
max = MAX_Y;
break;
case LANDSCAPE_UPSIDE_DOWN:
reverse(string);
drawFunc = &TFT::drawCharLandscapeUpsideDown;
max = MAX_Y;
break;
case LANDSCAPE_UPSIDE_DOWN_BACKWARDS:
drawFunc = &TFT::drawCharLandscapeUpsideDownBackwards;
max = MAX_Y;
break;
case LANDSCAPE_VERTICAL:
reverse(string);
drawFunc = &TFT::drawCharLandscapeVertical;
max = MAX_X;
break;
default:
drawFunc = &TFT::drawCharPortrait;
max = MAX_X;
break;
}
while (*string) {
(this->*drawFunc)(*string, poX, poY, size, fgcolor);
string++;
if (poX < max) {
poX += FONT_SPACE * size; /* Move cursor */
}
}
}
void TFT::fillRectangle(INT16U poX, INT16U poY, INT16U length, INT16U width, INT16U color) {
fillScreen(poX, poX + length, poY, poY + width, color);
}
void TFT::drawHorizontalLine(INT16U poX, INT16U poY,
INT16U length, INT16U color) {
setCol(poX, poX + length);
setPage(poY, poY);
sendCMD(0x2c);
for (INT16U i = 0; i < length; i++) {
sendData(color);
}
}
void TFT::drawLine(INT16U x0, INT16U y0, INT16U x1, INT16U y1, INT16U color) {
int x = x1 - x0;
int y = y1 - y0;
int dx = abs(x), sx = x0 < x1 ? 1 : -1;
int dy = -abs(y), sy = y0 < y1 ? 1 : -1;
int err = dx + dy, e2; /* error value e_xy */
for (;;) {
/* loop */
setPixel(x0, y0, color);
e2 = 2 * err;
if (e2 >= dy) { /* e_xy+e_x > 0 */
if (x0 == x1) {
break;
}
err += dy; x0 += sx;
}
if (e2 <= dx) { /* e_xy+e_y < 0 */
if (y0 == y1) {
break;
}
err += dx; y0 += sy;
}
}
}
void TFT::drawVerticalLine(INT16U poX, INT16U poY, INT16U length, INT16U color) {
setCol(poX, poX);
setPage(poY, poY + length);
sendCMD(0x2c);
for (INT16U i = 0; i < length; i++) {
sendData(color);
}
}
void TFT::drawRectangle(INT16U poX, INT16U poY, INT16U length, INT16U width, INT16U color) {
drawHorizontalLine(poX, poY, length, color);
drawHorizontalLine(poX, poY + width, length, color);
drawVerticalLine(poX, poY, width, color);
drawVerticalLine(poX + length, poY, width, color);
}
void TFT::drawCircle(int poX, int poY, int r, INT16U color) {
int x = -r, y = 0, err = 2 - 2 * r, e2;
do {
setPixel(poX - x, poY + y, color);
setPixel(poX + x, poY + y, color);
setPixel(poX + x, poY - y, color);
setPixel(poX - x, poY - y, color);
e2 = err;
if (e2 <= y) {
err += ++y * 2 + 1;
if (-x == y && e2 <= x) {
e2 = 0;
}
}
if (e2 > x) {
err += ++x * 2 + 1;
}
} while (x <= 0);
}
void TFT::fillCircle(int poX, int poY, int r, INT16U color) {
int x = -r, y = 0, err = 2 - 2 * r, e2;
do {
drawVerticalLine(poX - x, poY - y, 2 * y, color);
drawVerticalLine(poX + x, poY - y, 2 * y, color);
e2 = err;
if (e2 <= y) {
err += ++y * 2 + 1;
if (-x == y && e2 <= x) {
e2 = 0;
}
}
if (e2 > x) {
err += ++x * 2 + 1;
}
} while (x <= 0);
}
void TFT::drawTriangle(int poX1, int poY1, int poX2, int poY2, int poX3, int poY3, INT16U color) {
drawLine(poX1, poY1, poX2, poY2, color);
drawLine(poX1, poY1, poX3, poY3, color);
drawLine(poX2, poY2, poX3, poY3, color);
}
INT8U TFT::drawNumber(long long_num, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
INT8U char_buffer[10] = "";
INT8U i = 0;
INT8U f = 0;
INT8U Str[2] = "";
if (long_num < 0) {
f = 1;
drawString("-", poX, poY, size, fgcolor);
long_num = -long_num;
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
} else if (long_num == 0) {
f = 1;
drawString("0", poX, poY, size, fgcolor);
return f;
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
}
while (long_num > 0) {
char_buffer[i++] = long_num % 10;
long_num /= 10;
}
f = f + i;
for (; i > 0; i--) {
Str[0] = '0' + char_buffer[i - 1];
Str[1] = '\0';
drawString(Str, poX, poY, size, fgcolor);
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
}
return f;
}
INT8U TFT::drawFloat(float floatNumber, INT8U decimal, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
INT16U temp = 0;
float decy = 0.0;
float rounding = 0.5;
INT8U f = 0;
if (floatNumber < 0.0) {
drawString("-", poX, poY, size, fgcolor);
floatNumber = -floatNumber;
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
f = 1;
}
for (INT8U i = 0; i < decimal; ++i) {
rounding /= 10.0;
}
floatNumber += rounding;
temp = (INT16U)floatNumber;
INT8U howlong = drawNumber(temp, poX, poY, size, fgcolor);
f += howlong;
if ((poX + 8 * size * howlong) < MAX_X) {
poX += FONT_SPACE * size * howlong; /* Move cursor right */
}
if (decimal > 0) {
drawString(".", poX, poY, size, fgcolor);
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
f += 1;
}
decy = floatNumber - temp; /* decimal part, 4 */
for (INT8U i = 0; i < decimal; i++) {
decy *= 10; /* for the next decimal */
temp = decy; /* get the decimal */
drawNumber(temp, poX, poY, size, fgcolor);
floatNumber = -floatNumber;
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
decy -= temp;
}
f += decimal;
return f;
}
INT8U TFT::drawFloat(float floatNumber, INT16U poX, INT16U poY, INT16U size, INT16U fgcolor) {
INT8U decimal = 2;
INT16U temp = 0;
float decy = 0.0;
float rounding = 0.5;
INT8U f = 0;
if (floatNumber < 0.0) { /* floatNumber < 0 */
drawString("-", poX, poY, size, fgcolor); /* add a "-" */
floatNumber = -floatNumber;
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
f = 1;
}
for (INT8U i = 0; i < decimal; ++i) {
rounding /= 10.0;
}
floatNumber += rounding;
temp = (INT16U)floatNumber;
INT8U howlong = drawNumber(temp, poX, poY, size, fgcolor);
f += howlong;
if ((poX + 8 * size * howlong) < MAX_X) {
poX += FONT_SPACE * size * howlong; /* Move cursor right */
}
if (decimal > 0) {
drawString(".", poX, poY, size, fgcolor);
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
f += 1;
}
decy = floatNumber - temp; /* decimal part, */
for (INT8U i = 0; i < decimal; i++) {
decy *= 10; /* for the next decimal */
temp = decy; /* get the decimal */
drawNumber(temp, poX, poY, size, fgcolor);
floatNumber = -floatNumber;
if (poX < MAX_X) {
poX += FONT_SPACE * size; /* Move cursor right */
}
decy -= temp;
}
f += decimal;
return f;
}
/* In-place string reversion.
This is used for upside down string drawing: the advantage is that users
can seamlessly use TFT::drawString without being bothered about formatting
*/
void TFT::reverse(char* string) {
int length = 0;
while (*(string + length) != '\0') {
length++;
}
char* begin, *end, tmp;
begin = string;
end = string + length - 1;
for (int i = 0; i < length / 2; i++) {
tmp = *end;
*end = *begin;
*begin = tmp;
begin++;
end--;
}
}
TFT Tft = TFT();
/*********************************************************************************************************
END FILE
*********************************************************************************************************/