tft.loadFont - reading from SD card fails

Hi,

when I try to load a smooth font by using tft.loadFont, sometimes WIO Terminal hangs in the command and does not go on.

  • in the program below it hangs
  • the font is ok, works in another program, size is about 8k
  • other fonts do also not work
  • in another more complex program it works (so the font is ok, 4GB SD card as well)
  • drawImage from the same SD card work without problems

Anyone else who had problems with loadFont?

#include "SPI.h"
#include "Seeed_FS.h"           // Including SD card library
#include "SD/Seeed_SD.h"        // Including SD card library
#include "TFT_eSPI.h"

TFT_eSPI tft;

void setup() {
    // initialize Serial Monitor
    Serial.begin(9600);
    while (!Serial) {
      ; 
      }
    Serial.println("Starting..");
 
    // Initialize SD card
    Serial.println("Initializing SD Card...");  
    if (!SD.begin(SDCARD_SS_PIN, SDCARD_SPI)) {
        Serial.println("SD-Card Not Initialised!");
    }

    // Initialize TFT
    Serial.println("Initializing TFT...");  
    tft.begin();
    tft.setRotation(1);
    tft.loadFont("Verdana-18");               // stops here and hangs in this command
    Serial.println("Loading font done...");   // does not reach this line
    }
 
void loop() {
  }