Hi,
I'm using a tft ILI9225 wired with a Arduino pro mini.
I need to print a count number when a pushbutton is pressed.
The TFT_22_ILI9225 library has no tft.print capability or anything that
can print a counting number on the screen.
Is there any other way to do tft.print on the screen?
or
Is there any other library that works with ILI9225 beside TFT_22_ILI9225?
can someone help how to implement this?
Thanks for your help!
Hi,
You can try with GxTFT.
Download the library as zip-file, then add it using Library Manager "Add .ZIP Library...".
Start with the example "GxTFT_myTFTs_graphicstest.ino"
Select the pre-configured display header file by uncomment, comment the previous selection:
#include "myTFTs/my_2.0_TFT_INHAOS_LCD_2000_9225.h"
Save the example as starting point to add your code then.
GxTFT is not "Newbie friendly", but it can give you a starting point.
The ILI9225 specific code is taken from TFT_22_ILI9225. print() is available.
Jean-Marc
Oops, I forgot that the INHAOS_LCD_2000_9225 is special, as it uses a latched 8bit interface to the 16bit panel.
So you may need to use a different GxIO class, dependent on your display.
Please provide a link to your display if you need help. Be patient, as I am absent some time today.
As you use TFT_22_ILI9225, you most likely use SPI:
original myTFTs/my_2.0_TFT_INHAOS_LCD_2000_9225.h
// e.g. https://www.aliexpress.com/item/LCD-Development-Kit-9225-with-Mega-2560-2-0-TFT-LCD-Display-TFT-LCD-PCB-Adapter/32587170491.html
// this display uses 8 bit data bus but has a latch for 16 bit panel
#include "../GxIO/GxIO_MEGA_P8_MEGASHIELD_LS/GxIO_MEGA_P8_MEGASHIELD_LS.h"
#include "../GxCTRL/GxCTRL_ILI9225/GxCTRL_ILI9225.h" // 176x220
GxIO_Class io; // #define GxIO_Class is in the selected header file
GxCTRL_Class controller(io); // #define GxCTRL_Class is in the selected header file
TFT_Class tft(io, controller, 176, 220); // portrait 176x220
//TFT_Class tft(io, controller, 220, 1760); // landscape 176x220
version for SPI: (need to define RS/CD and RST)
#include "../GxIO/GxIO_SPI/GxIO_SPI.h"
#include "../GxCTRL/GxCTRL_ILI9225/GxCTRL_ILI9225.h" // 176x220
GxIO_Class io(SPI, SS, RS, RST);
GxCTRL_Class controller(io); // #define GxCTRL_Class is in the selected header file
TFT_Class tft(io, controller, 176, 220); // portrait 176x220
//TFT_Class tft(io, controller, 220, 1760); // landscape 176x220
TFT_22_ILI9225 has a drawPixel() method. So it would be easy to make it inherit from Adafruit_GFX.
Then you get all the Adafruit_GFX methods, including print().
I have created a clone and added Adafruit_GFX. Compiles ok, but untested.
Thank Zingg,
First I am going to try TFT_22_ILI9225. print() and see if I'm able to print the counter on the screen.
then if I'm unsuccessful I will give your library a try.
I used TFT_22_ILI9225.print(count) I got a response,
expected unqualified-id before '.' token
TFT_22_ILI9225.print() seems to be good idea.
because that was the only line of code I needed.
that's the link
Thanks for the link. Do I understand correctly that you have a compile error?
In this case you should post the error message "copy error message", then post it in code tags, symbol </>.
You can't use the class name directly, you have something like
TFT_22_ILI9225 myTFT(...);
then you use myTFT.print(count);
Check first with one of the examples and try to understand the example code.
The examples have an old-fashioned use of the constructor:
TFT_22_ILI9225 tft = TFT_22_ILI9225(TFT_RST, TFT_RS, TFT_CS, TFT_LED, TFT_BRIGHTNESS);
that constructs an instance and then copies that instance to the instance that will be used.
the normal use would be:
TFT_22_ILI9225 tft(TFT_RST, TFT_RS, TFT_CS, TFT_LED, TFT_BRIGHTNESS);
this is what trying to do
#include <TFT_22_ILI9225.h>
#include <SPI.h>
#define TFT_RST 8
#define TFT_RS 9
#define TFT_CS 10 // SS
#define TFT_SDI 11 // MOSI
#define TFT_CLK 13 // SCK
#define TFT_LED 3 // 0 if wired to +5V directly
#define TFT_BRIGHTNESS // Initial brightness of TFT backlight (optional)
#define Buzzer A0
#define Val 293
const int PhotoPin_P = 4;
int Q_count;
int Q_value = 0;
void setup {
this is set up
}
void loop {
counter();
}
void counter() {
Q_value = digitalRead(PhotoPin_Q);
if (Q_value >= Val) {
digitalWrite(TFT_LED, HIGH);
Q_count++;
tft.setCursor(100,46);
TFT_22_ILI9225 myTFT(Q_count);
myTFT.print(Q_count);
analogWrite(Buzzer, HIGH);
tone(Buzzer, 300, 100);
Serial.print("counter: ");
Serial.println(Q_count);
}
can you show what correction I have to make to have the counter print on the screen.
No, I can't. I do not like to post code that I can't test. But you can try this (untested):
#include <TFT_22_ILI9225.h>
#include <SPI.h>
#define TFT_RST 8
#define TFT_RS 9
#define TFT_CS 10 // SS
#define TFT_SDI 11 // MOSI
#define TFT_CLK 13 // SCK
#define TFT_LED 3 // 0 if wired to +5V directly
#define TFT_BRIGHTNESS 200 // Initial brightness of TFT backlight (optional) <<=====
#define Buzzer A0
#define Val 293
const int PhotoPin_P = 4;
int Q_count;
int Q_value = 0;
TFT_22_ILI9225 myTFT(TFT_RST, TFT_RS, TFT_CS, TFT_LED, TFT_BRIGHTNESS);
void setup {
//this is set up
myTFT.begin(); // <<=====
}
void loop {
counter();
}
void counter() {
Q_value = digitalRead(PhotoPin_Q);
if (Q_value >= Val) {
digitalWrite(TFT_LED, HIGH);
Q_count++;
tft.setCursor(100,46);
myTFT.print(Q_count);
analogWrite(Buzzer, HIGH);
tone(Buzzer, 300, 100);
Serial.print("counter: ");
Serial.println(Q_count);
}
the error was
exit status 1
'myTFT' was not declared in this scope
post the code and the complete error message.
If you want to use the TFT_22_ILI9225 library you just have to create the appropriate String.
void drawText(uint16_t x, uint16_t y, String s, uint16_t color = COLOR_WHITE);
/// Calculate 16-bit color from 8-bit Red-Green-Blue components
/// @param red red component, 0x00..0xff
/// @param green green component, 0x00..0xff
/// @param blue blue component, 0x00..0xff
/// @return 16-bit color
If you want to print an expression, simply use String(expression)
Personally, I am happier with Adafruit_GFX style libraries.
Then you tft.setCursor(x, y); tft.print(expression);
Arduino and the String class "works" but seems more clunky than using C or C++ expressions.
Producing nicely formatted text is so much easier with C printf() or sprintf(buffer, format, args...) and printing the resultant buffer
David.
thanks for replies,
I'm trying to print a counting number when a button is pressed on the screen.
create a string won't work for a counting number after a button is pressed.
on the ILI9225 tft.setCursor(x,y) and tft.print(counting) doesn't work.
class TFT_22_ILI9225' has no member named 'setCursor' or print
Of course it does. With your library:
tft.drawText(x, y, String(counter), COLOR_RED);
You would only use setCursor() and print() with a GFX style library.
one other thing,
with ILI9225 is there any other library that works with that screen
beside TFT_22_ILI9225.h?
I haven't come across one yet.
maybe you guys will since you're library writing master.