Screen alignment

[BorisFR]

I'm using the adafruit lib like this: `#include // Core graphics library

include // Hardware-specific library

include

define TFT_RST -1

define TFT_SCLK 5

define TFT_CS 16

define TFT_DC 17

define TFT_MOSI 23

Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);

void box (uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint16_t color) { for(uint8_t i=x; i<(x+width); i++) for(uint8_t j=y;j<(y+height);j++) tft.drawPixel(i, j, color); }

void setup() { tft.initR(INITR_BLACKTAB); tft.fillScreen(ST7735_BLACK); box(0,0,17,17,ST7735_CYAN); box(1,1,15,15,ST7735_RED); box(2,2,13,13,ST7735_WHITE); box(3,3,11,11,ST7735_BLUE); } ` Display on the left start with white (missing cyan and red), and on top with red (missing cyan). And there is also garbage on the screen at right and bottom as fillscreen ... don't fill the screen.

Do you have the same problem?

[BorisFR]

In fact, I found the lib TFT_eSPI by Bodmer and it is THE lib to use! https://github.com/Bodmer/TFT_eSPI The config to put in "User_Setup.h"

define ST7735_DRIVER

define TFT_WIDTH 128

define TFT_HEIGHT 160

define ST7735_GREENTAB2

define TFT_CS 16

define TFT_DC 17

define TFT_RST -1

define TFT_MISO -1

define TFT_MOSI 23

define TFT_SCLK 5

//#define SMOOTH_FONT

And then, it is just work great and really fast!

[jvhaarst]

This is about 10 times faster than the example the board came with :

#include <TFT_eSPI.h> // Hardware-specific library
#include <SPI.h>

TFT_eSPI tft = TFT_eSPI();       // Invoke custom library

float r, x1, ya, z1, x2, y2, z2, x3, y3, z3;               //
int f[8][2], x, y;                                         // Draw box, x, y center
int c[8][3] = {                                            // Cube
 {-20,-20, 20},{20,-20, 20},{20,20, 20},{-20,20, 20},
 {-20,-20,-20},{20,-20,-20},{20,20,-20},{-20,20,-20} };
//uint32_t fstart = 0;  // start time for frame rate calculation
//uint32_t fend = 0;    // end time for frame rate calculation
//float fps = 0;        // Used in frame rate calculation

void setup(void) {
  //Serial.begin(115200);
  tft.init(); 
  tft.fillScreen(TFT_BLACK);                                // CLEAR
  tft.setTextColor(TFT_GREEN);                             
  tft.setRotation(1);                                      // 
  x = tft.width() /2; x = x + 14;                          // x Center Calculate
  y = tft.height()/2;                                      // y Center Calculate
}

void loop(){
 for (int a = 0; a <= 360; a = a + 2 ) {                   // 0 to 360 degree
   for (int i = 0; i < 8; i++) {                           //
    r  = a * 0.0174532;                                    // 1 degree
    x1 = c[i][2] * sin(r) + c[i][0] * cos(r);              // rotate Y
    ya = c[i][1];                                          //
    z1 = c[i][2] * cos(r) - c[i][0] * sin(r);              //
    x2 = x1;                                               //
    y2 = ya * cos(r) - z1 * sin(r);                        // rotate X
    z2 = ya * sin(r) + z1 * cos(r);                        //
    x3 = x2 * cos(r) - y2 * sin(r);                        // rotate Z
    y3 = x2 * sin(r) + y2 * cos(r);                        //
    z3 = z2; x3 = x3 + x ; y3 = y3 + y ;                   //
    f[i][0] = x3; f[i][1] = y3; f[i][2] = z3;              // store new values
   }
   //fstart = millis();
   tft.fillScreen(TFT_BLACK);
   tft.drawLine(f[0][0],f[0][1],f[1][0],f[1][1],TFT_WHITE);
   tft.drawLine(f[1][0],f[1][1],f[2][0],f[2][1],TFT_WHITE);
   tft.drawLine(f[2][0],f[2][1],f[3][0],f[3][1],TFT_WHITE);
   tft.drawLine(f[3][0],f[3][1],f[0][0],f[0][1],TFT_WHITE);
   tft.drawLine(f[4][0],f[4][1],f[5][0],f[5][1],TFT_WHITE);
   tft.drawLine(f[5][0],f[5][1],f[6][0],f[6][1],TFT_WHITE);
   tft.drawLine(f[6][0],f[6][1],f[7][0],f[7][1],TFT_WHITE);
   tft.drawLine(f[7][0],f[7][1],f[4][0],f[4][1],TFT_WHITE);
   tft.drawLine(f[0][0],f[0][1],f[4][0],f[4][1],TFT_WHITE);
   tft.drawLine(f[1][0],f[1][1],f[5][0],f[5][1],TFT_WHITE);
   tft.drawLine(f[2][0],f[2][1],f[6][0],f[6][1],TFT_WHITE);
   tft.drawLine(f[3][0],f[3][1],f[7][0],f[7][1],TFT_WHITE);
   tft.drawLine(f[1][0],f[1][1],f[3][0],f[3][1],TFT_WHITE);// cross
   tft.drawLine(f[0][0],f[0][1],f[2][0],f[2][1],TFT_WHITE);// cross
   //fend = millis();
   //fps = (1000) / (fend-fstart);
   //tft.drawFloat(fps, 0, 0, 2);
   //Serial.print(fps); Serial.println("fps");// Show frame rate
   //delay(5);
 }
}

(on my board, the fps is about 60)