estou a alguns dias tentando descer esse medidos analógico, mas sou leigo em programação ainda e não consegui entender a logica...se alguém puder me ajudar por favor obrigado ^^
/*
An example analogue meter using a HX8357 TFT LCD screen
Needs Font 2 (also Font 4 if using large scale label)
Make sure all the required fonts are loaded by editting the
User_Setup.h file in the TFT_HX8357 library folder.
#########################################################################
DON'T FORGET TO UPDATE THE User_Setup.h FILE IN THE LIBRARY
TO SELECT THE FONTS AND PINS YOU USE, SEE ABOVE
#########################################################################
Updated by Bodmer for variable meter size
*/
// Define meter size as multiplier ot 240 pixels wide 1.0 and 1.3333 work OK
#define M_SIZE 1.3333
// #include <avr/dtostrf.h> // Only needed by Due
#include <TFT_HX8357.h> // Hardware-specific library
TFT_HX8357 tft = TFT_HX8357(); // Invoke custom library
#define TFT_GREY 0x5AEB
float ltx = 0; // Saved x coord of bottom of needle
uint16_t osx = M_SIZE120, osy = M_SIZE120; // Saved x & y coords
uint32_t updateTime = 0; // time for next update
int old_analog = -999; // Value last displayed
int value[6] = {0, 0, 0, 0, 0, 0};
int old_value[6] = { -1, -1, -1, -1, -1, -1};
int d = 0;
void setup(void) {
tft.init();
tft.setRotation(1);
Serial.begin(57600); // For debug
tft.fillScreen(TFT_BLACK);
analogMeter(); // Draw analogue meter
updateTime = millis(); // Next update time
}
void loop() {
if (updateTime <= millis()) {
updateTime = millis() + 35; // Update emter every 35 milliseconds
// Create a Sine wave for testing
d += 4; if (d >= 360) d = 0;
value[0] = 50 + 50 * sin((d + 0) * 0.0174532925);
plotNeedle(value[0], 0); // It takes between 2 and 12ms to replot the needle with zero delay
}
}
// #########################################################################
// Draw the analogue meter on the screen
// #########################################################################
void analogMeter()
{
// Meter outline
tft.fillRect(0, 0, M_SIZE239, M_SIZE126, TFT_GREY);
tft.fillRect(5, 3, M_SIZE230, M_SIZE119, TFT_WHITE);
tft.setTextColor(TFT_BLACK); // Text colour
// Draw ticks every 5 degrees from -50 to +50 degrees (100 deg. FSD swing)
for (int i = -50; i < 51; i += 5) {
// Long scale tick length
int tl = 15;
// Coodinates of tick to draw
float sx = cos((i - 90) * 0.0174532925);
float sy = sin((i - 90) * 0.0174532925);
uint16_t x0 = sx * (M_SIZE100 + tl) + M_SIZE120;
uint16_t y0 = sy * (M_SIZE100 + tl) + M_SIZE140;
uint16_t x1 = sx * M_SIZE100 + M_SIZE120;
uint16_t y1 = sy * M_SIZE100 + M_SIZE140;
// Coordinates of next tick for zone fill
float sx2 = cos((i + 5 - 90) * 0.0174532925);
float sy2 = sin((i + 5 - 90) * 0.0174532925);
int x2 = sx2 * (M_SIZE100 + tl) + M_SIZE120;
int y2 = sy2 * (M_SIZE100 + tl) + M_SIZE140;
int x3 = sx2 * M_SIZE100 + M_SIZE120;
int y3 = sy2 * M_SIZE100 + M_SIZE140;
// Yellow zone limits
//if (i >= -50 && i < 0) {
// tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_YELLOW);
// tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_YELLOW);
//}
// Green zone limits
if (i >= 0 && i < 25) {
tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_GREEN);
tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_GREEN);
}
// Orange zone limits
if (i >= 25 && i < 50) {
tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_ORANGE);
tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_ORANGE);
}
// Short scale tick length
if (i % 25 != 0) tl = 8;
// Recalculate coords incase tick lenght changed
x0 = sx * (M_SIZE100 + tl) + M_SIZE120;
y0 = sy * (M_SIZE100 + tl) + M_SIZE140;
x1 = sx * M_SIZE100 + M_SIZE120;
y1 = sy * M_SIZE100 + M_SIZE140;
// Draw tick
tft.drawLine(x0, y0, x1, y1, TFT_BLACK);
// Check if labels should be drawn, with position tweaks
if (i % 25 == 0) {
// Calculate label positions
x0 = sx * (M_SIZE100 + tl + 10) + M_SIZE120;
y0 = sy * (M_SIZE100 + tl + 10) + M_SIZE140;
switch (i / 25) {
case -2: tft.drawCentreString("0", x0, y0 - 12, 2); break;
case -1: tft.drawCentreString("25", x0, y0 - 9, 2); break;
case 0: tft.drawCentreString("50", x0, y0 - 7, 2); break;
case 1: tft.drawCentreString("75", x0, y0 - 9, 2); break;
case 2: tft.drawCentreString("100", x0, y0 - 12, 2); break;
}
}
// Now draw the arc of the scale
sx = cos((i + 5 - 90) * 0.0174532925);
sy = sin((i + 5 - 90) * 0.0174532925);
x0 = sx * M_SIZE100 + M_SIZE120;
y0 = sy * M_SIZE100 + M_SIZE140;
// Draw scale arc, don't draw the last part
if (i < 50) tft.drawLine(x0, y0, x1, y1, TFT_BLACK);
}
tft.drawString("%RH", M_SIZE*(5 + 230 - 40), M_SIZE*(119 - 20), 2); // Units at bottom right
tft.drawCentreString("%RH", M_SIZE120, M_SIZE70, 4); // Comment out to avoid font 4
tft.drawRect(5, 3, M_SIZE230, M_SIZE119, TFT_BLACK); // Draw bezel line
plotNeedle(0, 0); // Put meter needle at 0
}
// #########################################################################
// Update needle position
// This function is blocking while needle moves, time depends on ms_delay
// 10ms minimises needle flicker if text is drawn within needle sweep area
// Smaller values OK if text not in sweep area, zero for instant movement but
// does not look realistic... (note: 100 increments for full scale deflection)
// #########################################################################
void plotNeedle(int value, byte ms_delay)
{
tft.setTextColor(TFT_BLACK, TFT_WHITE);
char buf[8]; dtostrf(value, 4, 0, buf);
tft.drawRightString(buf, M_SIZE40, M_SIZE(119 - 20), 2);
if (value < -10) value = -10; // Limit value to emulate needle end stops
if (value > 110) value = 110;
// Move the needle until new value reached
while (!(value == old_analog)) {
if (old_analog < value) old_analog++;
else old_analog--;
if (ms_delay == 0) old_analog = value; // Update immediately if delay is 0
float sdeg = map(old_analog, -10, 110, -150, -30); // Map value to angle
// Calcualte tip of needle coords
float sx = cos(sdeg * 0.0174532925);
float sy = sin(sdeg * 0.0174532925);
// Calculate x delta of needle start (does not start at pivot point)
float tx = tan((sdeg + 90) * 0.0174532925);
// Erase old needle image
tft.drawLine(M_SIZE*(120 + 20 * ltx - 1), M_SIZE*(140 - 20), osx - 1, osy, TFT_WHITE);
tft.drawLine(M_SIZE*(120 + 20 * ltx), M_SIZE*(140 - 20), osx, osy, TFT_WHITE);
tft.drawLine(M_SIZE*(120 + 20 * ltx + 1), M_SIZE*(140 - 20), osx + 1, osy, TFT_WHITE);
// Re-plot text under needle
tft.setTextColor(TFT_BLACK);
tft.drawCentreString("%RH", M_SIZE120, M_SIZE70, 4); // // Comment out to avoid font 4
// Store new needle end coords for next erase
ltx = tx;
osx = M_SIZE*(sx * 98 + 120);
osy = M_SIZE*(sy * 98 + 140);
// Draw the needle in the new postion, magenta makes needle a bit bolder
// draws 3 lines to thicken needle
tft.drawLine(M_SIZE*(120 + 20 * ltx - 1), M_SIZE*(140 - 20), osx - 1, osy, TFT_RED);
tft.drawLine(M_SIZE*(120 + 20 * ltx), M_SIZE*(140 - 20), osx, osy, TFT_MAGENTA);
tft.drawLine(M_SIZE*(120 + 20 * ltx + 1), M_SIZE*(140 - 20), osx + 1, osy, TFT_RED);
// Slow needle down slightly as it approaches new postion
if (abs(old_analog - value) < 10) ms_delay += ms_delay / 5;
// Wait before next update
delay(ms_delay);
}
}
v u analogico.txt (7.62 KB)
