The sketch I created is based on the existing examples when I loaded the teensyduino into the Arduino IDE. I also used the adafrruit 4-wire touch panel library and I did not had difficulty using it. To summarize what the sketch do, I program the whole screen as a button, so when I hard-press the screen, it will automatically activate the wifi to search for existing wifi hotspots and display them on the screen and after 5 seconds, it display the wartch face again.
here is the watchface:
#include <stdint.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <TFT_ILI9163C.h>
#include "TouchScreen.h"
// Color definitions
#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF
#define YP A0 // must be an analog pin, use "An" notation!
#define XM A1 // must be an analog pin, use "An" notation!
#define YM 6 // can be a digital pin
#define XP 7 // can be a digital pin
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
/*
Teensy3.x and Arduino's
You are using 4 wire SPI here, so:
MOSI: 11//Teensy3.x/Arduino UNO (for MEGA/DUE refere to arduino site)
MISO: 12//Teensy3.x/Arduino UNO (for MEGA/DUE refere to arduino site)
SCK: 13//Teensy3.x/Arduino UNO (for MEGA/DUE refere to arduino site)
the rest of pin below:
*/
#define __CS 10
#define __DC 9
/*
Teensy 3.x can use: 2,6,9,10,15,20,21,22,23
Arduino's 8 bit: any
DUE: check arduino site
If you do not use reset, tie it to +3V3
*/
TFT_ILI9163C tft = TFT_ILI9163C(__CS, __DC,8);
uint16_t ccenterx,ccentery;//center x,y of the clock
const uint16_t cradius = 63;//radius of the clock
const float scosConst = 0.0174532925;
float sx = 0, sy = 1, mx = 1, my = 0, hx = -1, hy = 0;
float sdeg=0, mdeg=0, hdeg=0;
uint16_t osx,osy,omx,omy,ohx,ohy;
uint16_t x0 = 0, x1 = 0, yy0 = 0, yy1 = 0;
uint32_t targetTime = 0;// for next 1 second timeout
uint8_t hh,mm,ss; //containers for current time
void drawClockFace(){
tft.fillCircle(ccenterx, ccentery, cradius, BLUE);
tft.fillCircle(ccenterx, ccentery, cradius-4, BLACK);
// Draw 12 lines
for(int i = 0; i<360; i+= 30) {
sx = cos((i-90)*scosConst);
sy = sin((i-90)*scosConst);
x0 = sx*(cradius-4)+ccenterx;
yy0 = sy*(cradius-4)+ccentery;
x1 = sx*(cradius-11)+ccenterx;
yy1 = sy*(cradius-11)+ccentery;
tft.drawLine(x0, yy0, x1, yy1, BLUE);
}
}
static uint8_t conv2d(const char* p) {
uint8_t v = 0;
if ('0' <= *p && *p <= '9') v = *p - '0';
return 10 * v + *++p - '0';
}
void setup(void) {
tft.begin();
tft.setTextColor(WHITE, BLACK);
ccenterx = tft.width()/2;
ccentery = tft.height()/2;
osx = ccenterx;
osy = ccentery;
omx = ccenterx;
omy = ccentery;
ohx = ccenterx;
ohy = ccentery;
drawClockFace();// Draw clock face
//get current time from compiler
hh = conv2d(__TIME__);
mm = conv2d(__TIME__+3);
ss = conv2d(__TIME__+6);
targetTime = millis() + 1000;
Serial.begin(9600);
Serial1.begin(115200);
}
void drawClockHands(uint8_t h,uint8_t m,uint8_t s){
// Pre-compute hand degrees, x & y coords for a fast screen update
sdeg = s * 6; // 0-59 -> 0-354
mdeg = m * 6 + sdeg * 0.01666667; // 0-59 -> 0-360 - includes seconds
hdeg = h * 30 + mdeg * 0.0833333; // 0-11 -> 0-360 - includes minutes and seconds
hx = cos((hdeg-90)*scosConst);
hy = sin((hdeg-90)*scosConst);
mx = cos((mdeg-90)*scosConst);
my = sin((mdeg-90)*scosConst);
sx = cos((sdeg-90)*scosConst);
sy = sin((sdeg-90)*scosConst);
// Erase just old hand positions
tft.drawLine(ohx, ohy, ccenterx+1, ccentery+1, BLACK);
tft.drawLine(omx, omy, ccenterx+1, ccentery+1, BLACK);
tft.drawLine(osx, osy, ccenterx+1, ccentery+1, BLACK);
// Draw new hand positions
tft.drawLine(hx*(cradius-28)+ccenterx+1, hy*(cradius-28)+ccentery+1, ccenterx+1, ccentery+1, WHITE);
tft.drawLine(mx*(cradius-17)+ccenterx+1, my*(cradius-17)+ccentery+1, ccenterx+1, ccentery+1, WHITE);
tft.drawLine(sx*(cradius-14)+ccenterx+1, sy*(cradius-14)+ccentery+1, ccenterx+1, ccentery+1, RED);
tft.fillCircle(ccenterx+1, ccentery+1, 3, RED);
// Update old x&y coords
osx = sx*(cradius-14)+ccenterx+1;
osy = sy*(cradius-14)+ccentery+1;
omx = mx*(cradius-17)+ccenterx+1;
omy = my*(cradius-17)+ccentery+1;
ohx = hx*(cradius-28)+ccenterx+1;
ohy = hy*(cradius-28)+ccentery+1;
}
void loop() {
delay(100);
TSPoint p = ts.getPoint();
if (p.x > 300 and p.y > 300 and p.z < 300) {
tft.fillScreen();
tft.setCursor(0, 0);
tft.setTextColor(WHITE);
tft.setTextSize(2);
tft.println("CHECK WIFI NETWORKS");
tft.setTextColor(BLUE);
tft.setTextSize(1);
Serial1.write("AT+CWLAP\r\n");
delay(500);
while (Serial1.available()) {
char c = Serial1.read();
tft.print(c);
}
delay(5000);
tft.fillScreen();
tft.setTextColor(WHITE, BLACK);
ccenterx = tft.width()/2;
ccentery = tft.height()/2;
osx = ccenterx;
osy = ccentery;
omx = ccenterx;
omy = ccentery;
ohx = ccenterx;
ohy = ccentery;
drawClockFace();// Draw clock face
//get current time from compiler
hh = conv2d(__TIME__);
mm = conv2d(__TIME__+3);
ss = conv2d(__TIME__+6);
targetTime = millis() + 1000;
}
else {
if (targetTime < millis()) {
targetTime = millis()+1000;
ss++;
if (ss == 60) {
ss = 0;
mm++;
if(mm > 59) {
mm = 0;
hh++;
if (hh > 23) hh = 0;
}
}
drawClockHands(hh,mm,ss);
}
}
}
