Caleb Washburn

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10 years, 5 months ago.

QVGA TFT with ILI9341 driver not displaying with FRDM-k64F

I have a QVGA TFT module with a ILI9341 driver that I got on ebay, and I'm trying to get it to work on the frdm-K64F. I tried using the TFT_Test_ILI9341 program, but all it does is clear the screen from white to black, with a single red pixel at 0, 0. I have tried it with success on an Arduino, so it is not a hardware problem. I had to change the SPI format from (8, 3) to (8, 0), but except for that, I haven't made any changes to the library or the program. Can anyone give me some ideas?

SPI_TFT_ILI9341


// example to test the TFT Display
// Thanks to the GraphicsDisplay and TextDisplay classes
// test2.bmp has to be on the mbed file system

//#define NO_DMA

#include "stdio.h"
#include "mbed.h"
#include "SPI_TFT_ILI9341.h"
#include "string"
#include "Arial12x12.h"
#include "Arial24x23.h"
#include "Arial28x28.h"
#include "font_big.h"

extern unsigned char p1[];  // the mbed logo

// the TFT is connected to SPI pin 11-14

SPI_TFT_ILI9341 TFT(D11, D12, D13, D8, D10, D9,"TFT"); // mosi, miso, sclk, cs, reset, dc


int main()
{
    int i;
    //unsigned int y;
    TFT.claim(stdout);      // send stdout to the TFT display
    //TFT.claim(stderr);      // send stderr to the TFT display
    TFT.set_orientation(1);
    TFT.background(Black);    // set background to black
    TFT.foreground(White);    // set chars to white
    TFT.cls();                // clear the screen

    //y= 0;
    TFT.background(Black);
    TFT.cls();

    TFT.set_font((unsigned char*) Arial12x12);
    TFT.locate(0,0);
    printf("  Hello Mbed ");

    wait(5);        // wait five seconds

    // draw some graphics
    TFT.cls();
    TFT.set_font((unsigned char*) Arial24x23);
    TFT.locate(100,100);
    TFT.printf("Graphic");

    TFT.line(0,0,100,0,Green);
    TFT.line(0,0,0,200,Green);
    TFT.line(0,0,100,200,Green);

    TFT.rect(100,50,150,100,Red);
    TFT.fillrect(180,25,220,70,Blue);

    TFT.circle(80,150,33,White);
    TFT.fillcircle(160,190,20,Yellow);

    double s;

    for (i=0; i<320; i++) {
        s =20 * sin((long double) i / 10 );
        TFT.pixel(i,100 + (int)s ,Red);
    }


    wait(5);        // wait five seconds

    // bigger text
    TFT.foreground(White);
    TFT.background(Blue);
    TFT.cls();
    TFT.set_font((unsigned char*) Arial24x23);
    TFT.locate(0,0);
    TFT.printf("Different Fonts :");

    TFT.set_font((unsigned char*) Neu42x35);
    TFT.locate(0,30);
    TFT.printf("Hello Mbed 1");
    TFT.set_font((unsigned char*) Arial24x23);
    TFT.locate(20,80);
    TFT.printf("Hello Mbed 2");
    TFT.set_font((unsigned char*) Arial12x12);
    TFT.locate(35,120);
    TFT.printf("Hello Mbed 3");
    wait(5);

    // mbed logo
    TFT.background(Black);
    TFT.cls();

    TFT.locate(10,10);
    TFT.printf("Graphic from Flash");

    TFT.Bitmap(90,90,172,55,p1);

    wait(5);
    TFT.cls();
    TFT.locate(10,10);
    TFT.printf("Graphic from File System");
    TFT.locate(10,20);
    TFT.printf("open test.bmp");
    int err = TFT.BMP_16(20,50,"test.bmp");
    if (err != 1) TFT.printf(" - Err: %d",err);
}
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