OpenDagKlok/Test_Anti_aliased_Clock.ino
2024-03-07 07:22:50 +01:00

241 lines
7.2 KiB
C++

// Sketch to draw an analogue clock on the screen
// This uses anti-aliased drawing functions that are built into TFT_eSPI
// Anti-aliased lines can be drawn with sub-pixel resolution and permit lines to be
// drawn with less jaggedness.
// Based on a sketch by DavyLandman:
// https://github.com/Bodmer/TFT_eSPI/issues/905
#include "MBED_RPi_Pico_TimerInterrupt.h"
#define WIFI_SSID "Your_SSID"
#define WIFI_PASSWORD "Your_Password"
#include <Arduino.h>
#include <TFT_eSPI.h> // Master copy here: https://github.com/Bodmer/TFT_eSPI
#include <SPI.h>
#include "NotoSansBold15.h"
TFT_eSPI tft = TFT_eSPI(); // Invoke library, pins defined in User_Setup.h
TFT_eSprite face = TFT_eSprite(&tft);
#define CLOCK_FG TFT_BLACK
#define CLOCK_BG TFT_WHITE
#define SECCOND_FG TFT_RED
#define LABEL_FG TFT_NAVY
#define CLOCK_R 240.0f / 2.0f // Clock face radius (float type)
#define CLOCK_XY CLOCK_R
#define H_HAND_LENGTH CLOCK_R/2.0f
#define M_HAND_LENGTH CLOCK_R/1.4f
#define S_HAND_LENGTH CLOCK_R/1.3f
#define FACE_W CLOCK_R * 2 + 1
#define FACE_H CLOCK_R * 2 + 1
// Calculate 1 second increment angles. Hours and minute hand angles
// change every second so we see smooth sub-pixel movement
#define SECOND_ANGLE 360.0 / 60.0
#define MINUTE_ANGLE SECOND_ANGLE / 60.0
#define HOUR_ANGLE MINUTE_ANGLE / 12.0
// Sprite width and height
#define FACE_W CLOCK_R * 2 + 1
#define FACE_H CLOCK_R * 2 + 1
// Time h:m:s
uint8_t h = 0, m = 0, s = 0;
float time_secs = h * 3600 + m * 60 + s;
// Init RPI_PICO_Timer, can use any from 0-15 pseudo-hardware timers
MBED_RPI_PICO_Timer ITimer0(0);
void TimerHandler(uint alarm_num)
{
///////////////////////////////////////////////////////////
// Always call this for MBED RP2040 before processing ISR
///////////////////////////////////////////////////////////
TIMER_ISR_START(alarm_num);
// Increment time by 1000 milliseconds
time_secs += 1;
// Midnight roll-over
if (time_secs >= (60 * 60 * 24)) time_secs = 0;
////////////////////////////////////////////////////////////
// Always call this for MBED RP2040 after processing ISR
TIMER_ISR_END(alarm_num);
////////////////////////////////////////////////////////////
}
// =========================================================================
// Setup
// =========================================================================
void setup() {
Serial.begin(115200);
delay(500);
Serial.println("Booting...");
// Interval in microsecs
if (ITimer0.attachInterruptInterval(1000*1000, TimerHandler)) {
Serial.print(F("Starting ITimer0 OK, millis() = ")); Serial.println(millis());
}
else {
Serial.println(F("Can't set ITimer0. Select another freq. or timer"));
}
// Initialise the screen
tft.init();
// Ideally set orientation for good viewing angle range because
// the anti-aliasing effectiveness varies with screen viewing angle
// Usually this is when screen ribbon connector is at the bottom
tft.setRotation(0);
tft.fillScreen(TFT_RED);
// Create the clock face sprite
//face.setColorDepth(8); // 8 bit will work, but reduces effectiveness of anti-aliasing
face.createSprite(FACE_W, FACE_H);
// Only 1 font used in the sprite, so can remain loaded
face.loadFont(NotoSansBold15);
// Draw the whole clock - NTP time not available yet
renderFace(time_secs);
}
// =========================================================================
// Loop
// =========================================================================
void loop() {
char time[20];
static unsigned long targetTime = millis() + 1000;
static long d = -1;
long e = 0;
// Update time periodically
if (targetTime < millis()) {
// Update next tick time in 100 milliseconds for smooth movement
targetTime = millis() + 1000;
// All graphics are drawn in sprite to stop flicker
renderFace(time_secs);
if (d > 0 && time_secs < 5) {
d = -1;
}
e = ((unsigned long) time_secs) / (60*5); // 5 minute update
if ( e > d) {
d = e;
long r = (unsigned long) time_secs;
int h = (int)(r/3600);
r = r%3600;
int m = (int)(r/60);
int s = (int)(r % 60);
sprintf(time,"%02d:%02d:%02d",h,m,s);
Serial.print(F("Time "));
Serial.println(time);
}
}
while(Serial.available()) {
String str = Serial.readString();
int h = str.substring(0,2).toInt();
int m = str.substring(3,5).toInt();
int s = str.substring(6,8).toInt();
unsigned long t = s+m*60+h*3600;
time_secs = t;
d = -1;
sprintf(time,"%02d:%02d:%02d",h,m,s);
Serial.print(F("Setting to "));
Serial.println(time);
}
}
// =========================================================================
// Draw the clock face in the sprite
// =========================================================================
static void renderFace(float t) {
char time[20];
float h_angle = t * HOUR_ANGLE;
float m_angle = t * MINUTE_ANGLE;
//float s_angle = t * SECOND_ANGLE;
long r = (unsigned long) time_secs;
int h = (int)(r/3600);
r = r%3600;
int m = (int)(r/60);
int s = (int)(r % 60);
// The face is completely redrawn - this can be done quickly
face.fillSprite(TFT_BLACK);
// Draw the face circle
face.fillSmoothCircle( CLOCK_XY, CLOCK_XY, CLOCK_R, CLOCK_BG );
// Set text datum to middle centre and the colour
face.setTextDatum(MC_DATUM);
// The background colour will be read during the character rendering
face.setTextColor(CLOCK_FG, CLOCK_BG);
// Text offset adjustment
constexpr uint32_t dialOffset = CLOCK_R - 10;
float xp = 0.0, yp = 0.0; // Use float pixel position for smooth AA motion
// Draw digits around clock perimeter
for (uint32_t h = 1; h <= 12; h++) {
getCoord( CLOCK_XY, CLOCK_XY, &xp, &yp, dialOffset, h * 360.0 / 12);
face.drawNumber(h, xp, 2 + yp);
}
// Add text (could be digital time...)
face.setTextColor(LABEL_FG, CLOCK_BG);
sprintf(time,"%02d:%02d:%02d",h,m,s);
face.drawString(time, CLOCK_XY, CLOCK_XY * 0.75);
// Draw minute hand
getCoord( CLOCK_XY, CLOCK_XY, &xp, &yp, M_HAND_LENGTH, m_angle);
face.drawWideLine( CLOCK_XY, CLOCK_XY, xp, yp, 6.0f, CLOCK_FG);
// face.drawWideLine( CLOCK_XY, CLOCK_XY, xp, yp, 2.0f, CLOCK_BG);
// Draw hour hand
getCoord( CLOCK_XY, CLOCK_XY, &xp, &yp, H_HAND_LENGTH, h_angle);
face.drawWideLine( CLOCK_XY, CLOCK_XY, xp, yp, 6.0f, CLOCK_FG);
//face.drawWideLine( CLOCK_XY, CLOCK_XY, xp, yp, 2.0f, CLOCK_BG);
// Draw the central pivot circle
face.fillSmoothCircle( CLOCK_XY, CLOCK_XY, 4, CLOCK_FG);
// Draw second hand
//getCoord( CLOCK_XY, CLOCK_XY, &xp, &yp, S_HAND_LENGTH, s_angle);
//face.drawWedgeLine( CLOCK_XY, CLOCK_XY, xp, yp, 2.5, 1.0, SECCOND_FG);
face.pushSprite(0,0, TFT_TRANSPARENT);
}
// =========================================================================
// Get coordinates of end of a line, pivot at x,y, length r, angle a
// =========================================================================
// Coordinates are returned to caller via the xp and yp pointers
#define DEG2RAD 0.0174532925
void getCoord(int16_t x, int16_t y, float *xp, float *yp, int16_t r, float a)
{
float sx1 = cos( (a - 90) * DEG2RAD);
float sy1 = sin( (a - 90) * DEG2RAD);
*xp = sx1 * r + x;
*yp = sy1 * r + y;
}