I am trying to drive a 1.54-inch TFT, 240*240 display from an ESP8266 Development Module using the attached sketch.
// ST_7789_240x240TFT_ESP8266_radar
// Floris Wouterlood 21 December 2019
// public domain
// sketch for NodeMCU ESP8266
// display on a 1.3 inch 3.3V TFT_display with ST7789 controller
// 240 x 240 pixels in this confguration
//
// all x and y coordinates relative to center coordinates x=120 and y=120
// is your screen bigger than 240x240 -- change the center coordinates
#include <Arduino_DataBus.h>
#include <Arduino_G.h>
#include <Arduino_GFX.h>
#include <Arduino_GFX_Library.h>
#include <Arduino_TFT.h>
#include <Arduino_TFT_18bit.h>
#include <gfxfont.h>
#include <Arduino_ST7789.h> // hardware-specific library for ST7789
#include <SPI.h>
#define TFT_DC 3 // pin of your choice
#define TFT_RST 8 // pin of your choice
#define TFT_MOSI 7 // fixed pin
#define TFT_SCLK 5 // fixed pin
Arduino_ST7789 tft = Arduino_ST7789(3, 8);
// Arduino_ST7789 tft = Arduino_ST7789(TFT_DC, TFT_RST);
#define SCOPE 0x3206 // scope glass color - CRT like luminescent
// center coordinates
// for screens bigger than 240x240 - change these x-y coordinates
float center_x = 120; // center x of radar scope on 240x240 TFT display
float center_y = 120; // center y of radar scope on 240x240 TFT display
float edge_x = 0;
float edge_y = 0;
float edge_x_old = 0; // remember previous edge x coordinate
float edge_y_old = 0; // remember previous edge y coordinate
float edge_x_out = 0;
float edge_y_out = 0;
int j; // for for-next loops
float angle = 0;
int radius = 90;
int scope_x = 0;
int scope_y = 0;
void setup(void) {
Serial.begin (115200);
Serial.println (); // cut out the gibberish
Serial.println ();
Serial.println ("Hello! ST7789 TFT radar test"); // test Serial Monitor
Serial.println ("on NodeMCU ESP8266");
// if the display has CS pin try with SPI_MODE0 ** My display has a CS pin
// tft.init(240, 240, SPI_MODE2); // Init ST7789 display 240x240 pixel - rg
tft.init(240, 240,MODE0); // Init ST7789 display 240x240 pixel
tft.init (240, 240); // initialize a ST7789 chip, 240x240 pixels
tft.fillScreen (BLACK);
tft.setCursor (10, 10);
tft.setTextColor (YELLOW);
tft.setTextSize (3);
tft.println ("radar scope initializing"); // initialization message on the TFT display
tft.println ("............");
delay (500);
tft.fillScreen (BLACK);
// =========== construct the radar scope =====================================================
edge_x = (center_x);
edge_y = (center_y);
scope_x = (center_x-119);scope_y = (center_y-119);
tft.drawRect (scope_x,scope_y,239,239,RED); // rectangular scope outer contour
scope_x = (center_x+90); scope_y = (center_y-100); // right upper screw
screw();
scope_x = (center_x-90); scope_y = (center_y-100); // left upper screw
screw();
scope_x = (center_x-90); scope_y = (center_y+100); // left lower screw
screw();
scope_x = (center_x+90); scope_y = (center_y+100); // right lower screw
screw();
angle=0;
// scope CRT
tft.drawCircle (center_x,center_y, (radius+1), RED);
tft.drawCircle (center_x,center_y, (radius+2), RED);
tft.fillCircle (center_x,center_y, radius, SCOPE);
tft.fillCircle (center_x,center_y, radius, SCOPE);
tft.fillCircle (center_x,center_y, 2, GREEN);
tft.drawCircle (center_x,center_y, 60, GREEN);
tft.drawCircle (center_x,center_y, 90, GREEN);
draw_scale();
}
void loop (){
for (j=0;j<360;j++) {
angle = (j*0.01745331); // angle is expressed in radians - 1 degree = 0,01745331 radians
edge_coord (); // calculate beam
sweep_beam ();
tft.fillCircle (center_x,center_y,2,GREEN); // restore centerpoint
yield(); // resest ESP8266 timer and prevents WDT-necessary for NodeMCU
}
}
// =============== SUBROUTINES ===============================================================
// calculate beam radial end coordinates and remember previous end coordinates
void edge_coord (){
edge_x_old = edge_x;
edge_y_old = edge_y;
edge_x = (center_x+(radius*cos(angle)));
edge_y = (center_y+(radius*sin(angle)));
}
// erase old beam and draw new beam
void sweep_beam (){
// overdraw previous beam with scope color
tft.drawLine (center_x,center_y,edge_x_old,edge_y_old,SCOPE);
// draw new beam position with scope color
tft.drawLine (center_x,center_y,edge_x,edge_y,GREEN);
}
// draw screw subroutine
void screw (){
tft.drawCircle (scope_x,scope_y, 6,RED);
tft.drawLine ((scope_x-11),scope_y,(scope_x+11),(scope_y),RED);
tft.drawLine (scope_x,(scope_y-11),scope_x,(scope_y+11),RED);
}
// draw scale marker line segments subroutine
void draw_scale (){
j = 0;
do {
angle = (j*0.01745331); // angle expressed in radians - 1 degree = 0,01745331 radians
edge_x = (center_x+(radius*cos(angle)));
edge_y = (center_y+(radius*sin(angle)));
edge_x_out = (center_x+((radius+8)*cos(angle)));
edge_y_out = (center_y+((radius+8)*sin(angle)));
tft.drawLine (edge_x,edge_y, edge_x_out, edge_y_out,RED);
j = j+10;
} while (j<360);
}I get no image on the display. I get the attached error message when I try to upload this sketch.
Error Message
The error message I receive at the bottom of the screen is:
The pin wiring and connection diagram used for this sketch is:
I feel as though I have missed loading some Arduino library to make this sketch work, but I am not a guru solving this type of problem.