Mike D.

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9 years, 1 month ago.

InterruptIn breaks SPI_TFT_ILI9341 (no printf inside callback)

I'm having a problem with using an interrupt while also using the SPI_TFT_ILI9341 library with my FRDM-KL25Z. The code below works until I uncomment line 7 ("InterruptIn doThing(PTB19);") - at which point I get an unchanging, white screen.

This is obviously just test code, to illustrate the problem (and to prove to myself that it's not isolated to my actual project).

Is this a bug, or am I missing something?

Many thanks in advance.

#include "mbed.h"
#include "SPI_TFT_ILI9341.h"
#include "Arial12x12.h"


DigitalOut toDoPin(PTB18);
//InterruptIn doThing(PTB19);

SPI_TFT_ILI9341 TFT(PTC7, PTC6, PTD1, PTE31, PTE24, PTE25, "TFT"); //mosi, miso, sclk, cs, reset, dc  


void display_setup(void){
    TFT.set_orientation(1);
    TFT.background(Black);
    TFT.foreground(White);
    TFT.cls();        
    }

void update_display(void){
    TFT.set_font((unsigned char*) Arial12x12);
    TFT.foreground(Red);
    TFT.locate(25,30);
    TFT.printf("TEST"); 
    }
        
void toDo(void){
    toDoPin = !toDoPin;
    }

int main() {
//    doThing.rise(&toDo);
    display_setup();
    
  
    while (1){
        update_display();
    }
    
}
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