acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
TFT_Float_Test.ino (2318B)
      1 /*
      2 Tests the updated floating point plot function
      3 The datum is set to the centre of the 320 x 240 screen
      4 so numbers are printed the middle.
      5 
      6 The last test shows the datum point as a red dot.
      7 
      8 Normally strings are printed relative to the top left corner but this can be
      9 changed with the setTextDatum() function. The library has #defines for:
     10 
     11 TL_DATUM  0 //Top left
     12 TC_DATUM  1 //Top centre
     13 TR_DATUM  2 //Top right
     14 ML_DATUM  3 //Middle left
     15 MC_DATUM  4 //Middle centre
     16 MR_DATUM  5 //Middle right
     17 BL_DATUM  6 //Bottom left
     18 BC_DATUM  7 //Bottom centre
     19 BR_DATUM  8 //Bottom right
     20 
     21  
     22  Needs fonts 2 and 6
     23 
     24  Make sure all the display driver and pin connections are correct by
     25  editing the User_Setup.h file in the TFT_eSPI library folder.
     26 
     27  #########################################################################
     28  ###### DON'T FORGET TO UPDATE THE User_Setup.h FILE IN THE LIBRARY ######
     29  #########################################################################
     30  */
     31 
     32 
     33 #include <TFT_eSPI.h> // Hardware-specific library
     34 #include <SPI.h>
     35 
     36 TFT_eSPI tft = TFT_eSPI();       // Invoke custom library
     37 
     38 unsigned long drawTime = 0;
     39 
     40 void setup(void) {
     41   Serial.begin(115200);
     42   tft.init();
     43   tft.setRotation(1);
     44 
     45 }
     46 
     47 void loop() {
     48 
     49   char tmp[12];
     50   
     51   tft.fillScreen(TFT_BLACK);
     52   tft.setTextColor(TFT_WHITE, TFT_BLACK);
     53   
     54   // Datum is middle centre
     55   tft.setTextDatum(MC_DATUM);
     56 
     57   // Test floating point drawing function:
     58   // drawFloat(value, precision, x, y, font);
     59   
     60   float test = 67.125;
     61   tft.drawFloat(test, 4, 160, 120, 6);
     62     tft.drawString(dtostrf(test,4,4,tmp), 100, 200, 6);
     63 
     64   delay(1000);
     65   tft.fillScreen(TFT_BLACK);
     66   
     67   test = -0.555555;
     68   tft.drawFloat(test, 3, 160, 120, 6);
     69     tft.drawString(dtostrf(test,2,2,tmp), 100, 200, 6);
     70 
     71   delay(1000);
     72   tft.fillScreen(TFT_BLACK);
     73   
     74   test = 0.123;
     75   tft.drawFloat(test, 4, 160, 120, 6);
     76 
     77   tft.drawString(dtostrf(test,4,4,tmp), 100, 200, 6);
     78 
     79   delay(1000);
     80   tft.fillScreen(TFT_BLACK);
     81 
     82   // This does not work at the moment....
     83   test = 9999999;
     84   tft.drawFloat(test, 0, 160, 120, 6);
     85   tft.drawString(dtostrf(test,4,4,tmp), 100, 200, 6);
     86   delay(1000);
     87 
     88   //Plot the datum for the last number
     89   tft.fillCircle(160,120,5,TFT_RED);
     90   tft.setTextDatum(MC_DATUM);
     91   tft.setTextColor(TFT_BLACK);
     92   tft.drawString("X", 160, 120, 2);
     93  
     94   delay(4000);
     95 }
     96 
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