Code runs ok on a UNO etc, but wont complie on a WEMOS D1 Compilation error: exit status 1
t/*
An example analogue meter using a ILI9341 TFT LCD screen
This example uses the hardware SPI only and a board based
on the ATmega328
Needs Fonts 2, and 7 (also Font 4 if using large scale label)
Comment out lines 153 and 197 to reduce needle flicker and
to remove need for Font 4 (which uses ~8k of FLASH!)
Alan Senior 23/2/2015
*/
// These are the connections for the UNO to display
#define sclk D13 // Don't change
#define mosi D11 // Don't change
#define cs D1 // If cs and dc pin allocations are changed then
#define dc D2 // comment out #define F_AS_T line in "Adafruit_ILI9341_FAST.h"
// (which is inside "Adafriit_ILI9341_AS" library)
#define rst -1 // Can alternatively connect this to the Arduino reset
#include <Adafruit_GFX_AS.h> // Core graphics library
#include <Adafruit_ILI9341_AS.h> // Fast hardware-specific library
#include <SPI.h>
#define ILI9341_GREY 0x5AEB
Adafruit_ILI9341_AS tft = Adafruit_ILI9341_AS(cs, dc, rst); // Invoke custom library
float ltx = 0; // Saved x coord of bottom of needle
uint16_t osx = 120, osy = 120; // Saved x & y coords
uint32_t updateTime = 0; // time for next update
int old_analog = -999; // Value last displayed
int old_digital = -999; // Value last displayed
void setup(void) {
tft.init();
tft.setRotation(2);
tft.fillScreen(ILI9341_BLACK);
analogMeter(); // Draw analogue meter
digitalMeter(); // Draw digital meter
updateTime = millis(); // Next update time
}
void loop() {
if (updateTime <= millis()) {
updateTime = millis() + 500;
int reading = 0;
reading = random(-50, 151); // Test with random value
reading = map(analogRead(A0),0,1023,0,100); // Test with value form Analogue 0
showDigital(reading); // Update digital reading
plotNeedle(reading, 8); // Update analogue meter, 8ms delay per needle increment
}
}
// #########################################################################
// Draw the analogue meter on the screen
// #########################################################################
void analogMeter()
{
// Meter outline
tft.fillRect(0, 0, 239, 126, ILI9341_GREY);
tft.fillRect(5, 3, 230, 119, ILI9341_WHITE);
tft.setTextColor(ILI9341_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 * (100 + tl) + 120;
uint16_t y0 = sy * (100 + tl) + 140;
uint16_t x1 = sx * 100 + 120;
uint16_t y1 = sy * 100 + 140;
// 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 * (100 + tl) + 120;
int y2 = sy2 * (100 + tl) + 140;
int x3 = sx2 * 100 + 120;
int y3 = sy2 * 100 + 140;
// Yellow zone limits
//if (i >= -50 && i < 0) {
// tft.fillTriangle(x0, y0, x1, y1, x2, y2, ILI9341_YELLOW);
// tft.fillTriangle(x1, y1, x2, y2, x3, y3, ILI9341_YELLOW);
//}
// Green zone limits
if (i >= 0 && i < 25) {
tft.fillTriangle(x0, y0, x1, y1, x2, y2, ILI9341_GREEN);
tft.fillTriangle(x1, y1, x2, y2, x3, y3, ILI9341_GREEN);
}
// Orange zone limits
if (i >= 25 && i < 50) {
tft.fillTriangle(x0, y0, x1, y1, x2, y2, ILI9341_ORANGE);
tft.fillTriangle(x1, y1, x2, y2, x3, y3, ILI9341_ORANGE);
}
// Short scale tick length
if (i % 25 != 0) tl = 8;
// Recalculate coords incase tick lenght changed
x0 = sx * (100 + tl) + 120;
y0 = sy * (100 + tl) + 140;
x1 = sx * 100 + 120;
y1 = sy * 100 + 140;
// Draw tick
tft.drawLine(x0, y0, x1, y1, ILI9341_BLACK);
// Check if labels should be drawn, with position tweaks
if (i % 25 == 0) {
// Calculate label positions
x0 = sx * (100 + tl + 10) + 120;
y0 = sy * (100 + tl + 10) + 140;
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 - 6, 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 * 100 + 120;
y0 = sy * 100 + 140;
// Draw scale arc, don't draw the last part
if (i < 50) tft.drawLine(x0, y0, x1, y1, ILI9341_BLACK);
}
tft.drawString("%RH", 5 + 230 - 40, 119 - 20, 2); // Units at bottom right
tft.drawCentreString("%RH", 120, 70, 4); // Comment out to avoid font 4
tft.drawRect(5, 3, 230, 119, ILI9341_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(ILI9341_BLACK, ILI9341_WHITE);
char buf[8]; dtostrf(value, 4, 0, buf);
tft.drawRightString(buf, 40, 119 - 20, 2);
if (value < -10) value = -10; // Limit value to emulate needle end stops
if (value > 110) value = 110;
// Move the needle util 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 id 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(120 + 20 * ltx - 1, 140 - 20, osx - 1, osy, ILI9341_WHITE);
tft.drawLine(120 + 20 * ltx, 140 - 20, osx, osy, ILI9341_WHITE);
tft.drawLine(120 + 20 * ltx + 1, 140 - 20, osx + 1, osy, ILI9341_WHITE);
// Re-plot text under needle
tft.setTextColor(ILI9341_BLACK);
tft.drawCentreString("%RH", 120, 70, 4); // // Comment out to avoid font 4
// Store new needle end coords for next erase
ltx = tx;
osx = sx * 98 + 120;
osy = sy * 98 + 140;
// Draw the needle in the new postion, magenta makes needle a bit bolder
// draws 3 lines to thicken needle
tft.drawLine(120 + 20 * ltx - 1, 140 - 20, osx - 1, osy, ILI9341_RED);
tft.drawLine(120 + 20 * ltx, 140 - 20, osx, osy, ILI9341_MAGENTA);
tft.drawLine(120 + 20 * ltx + 1, 140 - 20, osx + 1, osy, ILI9341_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);
}
}
// #########################################################################
// Draw 3 digit digital meter with faint 7 segment image
// #########################################################################
void digitalMeter()
{
int xpos = 118, ypos = 134; // was 134
tft.fillRect(xpos - 52, ypos - 5, 2 * 54, 59, ILI9341_GREY);
tft.fillRect(xpos - 49, ypos - 2, 2 * 51, 53, ILI9341_BLACK);
tft.setTextColor(7 << 11, ILI9341_BLACK); // Plot over numbers in dim red
tft.drawString("888", xpos - 48, ypos+1, 7);
}
// #########################################################################
// Update digital meter reading
// #########################################################################
void showDigital(int value)
{
if (value==old_digital) return; // return if no change to prevent flicker
if (value < 0) value = 0; //Constrain lower limit to 0
if (value > 999) value = 999; //Constrain upper limit to 999
int xpos = 118, ypos = 134+1; // Position with location tweak
tft.setTextColor(7 << 11, ILI9341_BLACK); // Plot over numbers in dim red
tft.drawString("888", xpos - 47, ypos, 7); //Erase old value
// Nb. 32 pixels wide +2 gap per digit
// Update with new value
tft.setTextColor(ILI9341_RED); // Dont draw background to leave dim segments
if (value < 10) tft.drawNumber(value, xpos+19, ypos, 7);
else if (value < 100) tft.drawNumber(value, xpos - 14, ypos, 7);
else tft.drawNumber(value, xpos - 47, ypos, 7);
old_digital = value;
}
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