Bonjour
-Arduino mega
-TFT LCD 2.8
voila je viens de monter une Horloge analogique en me basant sur ce lien
et cela marche bien (aucun merite sauf de l'avoir monte 
) ....a chaque on/off je doit relancer le sketch pour qu'elle se met a l'heure du pc
ma question est : y a t'il un moyen pour updater l'heure sans televerser le sketch a chaque allumage (on transmettant le time via usb par exemple ou ajouter des commandes dans le sketch pour pouvoir regler le time via l'ecran tft ou arduino + switch )?
sinon si je devais ajouter un RTC (je pense que c'est la solution idoine pour la portabilite) que dois-je changer dans le scketch? je joint le code a toute fin utile
merci pour tout
#include <SPFD5408_Adafruit_TFTLCD.h>
//TFT & Arduino pins affectation
#define LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0
#define LCD_RESET A4
// Human Readable color
#define TFT_BLACK 0x0000
#define TFT_BLUE 0x001F
#define TFT_RED 0xF800
#define TFT_GREEN 0x07E0
#define TFT_CYAN 0x07FF
#define TFT_MAGENTA 0xF81F
#define TFT_YELLOW 0xFFE0
#define TFT_WHITE 0xFFFF
#define TFT_GREY 0x5AEB
// Invoke custom library for TFT
Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);
float sx = 0, sy = 1, mx = 1, my = 0, hx = -1, hy = 0;
float sdeg = 0, mdeg = 0, hdeg = 0;
uint16_t osx = 120, osy = 120, omx = 120, omy = 120, ohx = 120, ohy = 120;
int16_t x0 = 0, x1 = 0, yy0 = 0, yy1 = 0, x00 = 0, yy00 = 0;
// for next 1 second timeout
uint32_t targetTime = 0;
uint16_t xpos;
// Forward declaration needed for IDE 1.6.x
uint8_t conv2d(const char* p) {
uint8_t v = 0;
if ('0' <= *p && *p <= '9')
v = *p - '0';
return 10 * v + *++p - '0';
}
// Get H, M, S from compile time
uint8_t hh = conv2d(__TIME__), mm = conv2d(__TIME__ + 3), ss = conv2d(__TIME__ + 6);
boolean initial = 1;
char d;
void setup(void) {
tft.reset();
tft.begin(0x9341);
tft.setRotation(1);
tft.setTextColor(TFT_WHITE);// text color
tft.fillScreen(TFT_BLACK);// background color
xpos = tft.width() / 2;
tft.drawCircle(xpos, 120, 125, TFT_YELLOW); //1st outer circle
tft.fillCircle(xpos, 120, 118, TFT_BLUE); //2nd circle
tft.fillCircle(xpos, 120, 110, TFT_BLACK); //3th circle in black
for (int a=95; a<104; a++){
tft.drawCircle(xpos, 120, a, TFT_WHITE);}
for (int i = 0; i < 360; i += 30) {
sx = cos((i - 90) * 0.0174532925);
sy = sin((i - 90) * 0.0174532925);
x0 = sx * 114 + xpos;
yy0 = sy * 114 + 120;
x1 = sx * 100 + xpos;
yy1 = sy * 100 + 120;
tft.drawLine(x0, yy0, x1, yy1, TFT_YELLOW);
}
for (int i = 0; i < 360; i += 6) {
sx = cos((i - 90) * 0.0174532925);
sy = sin((i - 90) * 0.0174532925);
x0 = sx * 102 + xpos;
yy0 = sy * 102 + 120;
x00 = sx * 92 + xpos;
yy00 = sy * 92 + 120;
// Draw minute markers
tft.drawPixel(x0, yy0, TFT_GREEN);
tft.drawLine(x0, yy0, x00, yy00, TFT_BLACK);
tft.drawLine(x0+1, yy0+1, x00+1, yy00+1, TFT_BLACK);
// Draw main quadrant dots
if (i == 0 || i == 180) tft.fillCircle(x0, yy0, 2, TFT_WHITE);
if (i == 90 || i == 270) tft.fillCircle(x0, yy0, 2, TFT_WHITE);
}
tft.fillCircle(xpos, 121, 3, TFT_WHITE);
targetTime = millis() + 1000;
}
void loop() {
if (targetTime < millis()) {
targetTime = millis() + 1000;
ss++;
if (ss == 60) {
ss = 0;
mm++;
if (mm > 59) {
mm = 0;
hh++;
if (hh > 23) {
hh = 0;
}
}
}
sdeg = ss * 6; // 0-59 -> 0-354
mdeg = mm * 6 + sdeg * 0.01666667; // 0-59 -> 0-360 - includes seconds, but these increments are not used
hdeg = hh * 30 + mdeg * 0.0833333; // 0-11 -> 0-360 - includes minutes and seconds, but these increments are not used
hx = cos((hdeg - 90) * 0.0174532925);
hy = sin((hdeg - 90) * 0.0174532925);
mx = cos((mdeg - 90) * 0.0174532925);
my = sin((mdeg - 90) * 0.0174532925);
sx = cos((sdeg - 90) * 0.0174532925);
sy = sin((sdeg - 90) * 0.0174532925);
if (ss == 0 || initial) {
initial = 0;
// Erase hour and minute hand positions every minute
tft.drawLine(ohx, ohy, xpos, 121, TFT_BLACK);
ohx = hx * 62 + xpos + 1;
ohy = hy * 62 + 121;
tft.drawLine(omx, omy, xpos, 121, TFT_BLACK);
omx = mx * 84 + xpos;
omy = my * 84 + 121;
}
// Redraw new hand positions, hour and minute hands not erased here to avoid flicker
tft.drawLine(osx, osy, xpos, 121, TFT_BLACK);
osx = sx * 90 + xpos + 1;
osy = sy * 90 + 121;
tft.drawLine(osx, osy, xpos, 121, TFT_RED);
tft.drawLine(ohx, ohy, xpos, 121, TFT_CYAN);
tft.drawLine(omx, omy, xpos, 121, TFT_WHITE);
tft.drawLine(osx, osy, xpos, 121, TFT_RED);
tft.fillCircle(xpos, 121, 3, TFT_RED);
tft.setCursor(xpos-30, 50);
tft.setTextSize(2);
tft.print("H-Ah");
// Draw MINI clock face "SECOND"
tft.drawCircle(xpos, 155, 20, TFT_YELLOW);
tft.drawCircle(xpos, 155, 18, TFT_BLUE);
tft.drawCircle(xpos, 155, 17, TFT_CYAN);
tft.drawCircle(xpos, 155, 16, TFT_CYAN);
tft.fillRect(xpos-10, 149,22,15,TFT_BLACK); //erase
if(ss<10){tft.setCursor(xpos-10, 149); tft.setTextSize(2);
tft.print('0'); tft.setCursor(xpos+2, 149);}
else{
tft.setCursor(xpos-10, 149);}
tft.setTextSize(2);
tft.print(ss);
// Draw MINI clock face "Minutes"
tft.drawCircle(xpos+35, 117, 20, TFT_YELLOW);
tft.drawCircle(xpos+35, 117, 18, TFT_BLUE);
tft.drawCircle(xpos+35, 117, 17, TFT_CYAN);
tft.drawCircle(xpos+35, 117, 16, TFT_CYAN);
tft.fillRect(xpos+25, 111,22,15,TFT_BLACK); //erase
if(mm<10){tft.setCursor(xpos+25, 111); tft.setTextSize(2);
tft.print('0'); tft.setCursor(xpos+37, 111);}
else{
tft.setCursor(xpos+25, 111);}
tft.println(mm);
// Draw MINI clock face "Hour"
tft.drawCircle(xpos-35, 117, 20, TFT_YELLOW);
tft.drawCircle(xpos-35, 117, 18, TFT_BLUE);
tft.drawCircle(xpos-35, 117, 17, TFT_CYAN);
tft.drawCircle(xpos-35, 117, 16, TFT_CYAN);
tft.fillRect(xpos-45, 111,22,15,TFT_BLACK); //erase
if(hh<10){tft.setCursor(xpos-45, 111); tft.setTextSize(2);
tft.print('0'); tft.setCursor(xpos-33, 111);}
else{
tft.setCursor(xpos-45, 111);}
tft.setTextSize(2);
tft.print(hh);
//tft.setCursor(xpos-65, 111);
//tft.println(':');
if (hh>=0 && hh<12) d='A'; else {d='P';}
tft.drawRoundRect(xpos-14,72,29,21,5,TFT_CYAN);
tft.fillRect(xpos-11, 75,23,15,TFT_BLACK); //erase
tft.setCursor(xpos-11, 75);
tft.setTextSize(2);
tft.print(d);
tft.println('M');
}
}
