Miles,
I gave up on the TFT Menu library when I was working on my project, there isn't very good documentation except for the example and I only needed a single screen. Maybe I can answer a few questions from the code you posted:
The # defines are needed for the touch screen, the statements you have are for the MEGA.
I'm not sure about the string value.
You forgot the quotations on "sensorPrintout".
You will need the Tft.init statement.
I did a little experimenting with my TFT tonight. My current project has two joysticks attached to my Mega, so I just used these for test sensor values. If you just want to print out sensor values, here is an example sketch that displays time and pot values:
/* Modified from Draw Texts - Demonstrate drawChar and drawString
/ Example to display sensor data on TFT screen
/
/ For Arduino MEGA with Seeed V1 TFT Touch Shield
/ Circuit: Joystick, or Pot center pin connected to A8, A9, and A10.
/ pot outer pins connected to GND and 5V
/
*/
#include <stdint.h>
#include <TouchScreen.h>
#include <TFT.h>
#define YP A2 // must be an analog pin, use "An" notation!
#define XM A1 // must be an analog pin, use "An" notation!
#define YM 54 // can be a digital pin, this is A0
#define XP 57 // can be a digital pin, this is A3
int sensor1Data; // Data varable for JS1 pot 1
int sensor2Data; // Data varable for JS1 pot 2
int sensor3Data; // Data varable for JS2 pot 3
char sensor1Char[4]; // Charactor array for pot 1
char sensor2Char[4]; // Charactor array for pot 2
char sensor3Char[4]; // Charactor array for pot 3
long timerData; // Data varable for timer
char timerChar[4]; // Charactor array for timer
void setup()
{
Tft.init(); //init TFT library
pinMode(A8, INPUT); // JS1 input (pot 1 u/d)
pinMode(A9, INPUT); // JS1 input (pot 2 r/l)
pinMode(A10, INPUT); // JS2 input (pot 3 u/d)
drawScreen(); // Draw info that does not change once
}
void loop()
{
getSensor(); // Get Sensor Data
// Print Char to TFT //
Tft.fillRectangle(140,40,50,15,BLACK); // Clear old text
Tft.drawString(timerChar,140,40,2,CYAN); // Print time
Tft.fillRectangle(140,70,60,15,BLACK); // Clear old text
Tft.drawString(sensor1Char,140,70,2,WHITE); // Print Sensor 1
Tft.fillRectangle(140,100,60,15,BLACK); // Clear old text
Tft.drawString(sensor2Char,140,100,2,WHITE); // Print Sensor 2
Tft.fillRectangle(140,130,60,15,BLACK); // Clear old text
Tft.drawString(sensor3Char,140,130,2,WHITE); // Print Sensor 3
delay(1000); // delay to read screen
}
// Draw Screen Function //
// Draw all the text and objects that will not change //
void drawScreen(){
Tft.drawRectangle(0, 3, 238,30,BLUE); // HEADER TITLE
Tft.drawString("DISPLAY DATA",20,15,2,WHITE); // header name
Tft.drawString("Seconds:",2,40,2,CYAN);
Tft.drawString("Elevator:",2,70,2,WHITE);
Tft.drawString("Rudder:",2,100,2,WHITE);
Tft.drawString("Throttle:",2,130,2,WHITE);
}
// Get Sensor Function //
// Gets sensor data and converts to character //
void getSensor(){
timerData = millis()/1000; // Read time
int val= analogRead(A8); // Read JS1 (pot 1)
sensor1Data= map(val,0,1023,0,100); // Map value from 0-100
val= analogRead(A9); // Read JS1 (pot 2)
sensor2Data= map(val,0,1023,0,100); // Map value from 0-100
val= analogRead(A10); // Read JS2 (pot 3)
sensor3Data= map(val,0,1023,0,100); // Map value from 0-100
// Convert Data to Char //
itoa (timerData, timerChar, 10);
itoa(sensor1Data, sensor1Char, 10); // convert sensor data to char
itoa(sensor2Data, sensor2Char, 10); // convert sensor data to char
itoa(sensor3Data, sensor3Char, 10); // convert sensor data to char
}
Tips: If your sensor data changes slowly, increase the delay to reduce flicker.
When clearing old text, clear just the area you need to reduce the slow screen refresh rate.
Dave
