kopia lustrzana https://github.com/pimoroni/pimoroni-pico
127 wiersze
3.4 KiB
C++
127 wiersze
3.4 KiB
C++
#include "pico/stdlib.h"
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#include <stdio.h>
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#include <math.h>
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#include <sstream>
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#include <iomanip>
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#include "common/pimoroni_i2c.hpp"
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#include "pico_explorer.hpp"
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#include "breakout_potentiometer.hpp"
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#include "drivers/st7789/st7789.hpp"
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#include "libraries/pico_graphics/pico_graphics.hpp"
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using namespace pimoroni;
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ST7789 st7789(PicoExplorer::WIDTH, PicoExplorer::HEIGHT, ROTATE_0, false, get_spi_pins(BG_SPI_FRONT));
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PicoGraphics_PenRGB332 graphics(st7789.width, st7789.height, nullptr);
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Pen BLACK = graphics.create_pen(0, 0, 0);
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Pen RED = graphics.create_pen(255, 0, 0);
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Pen GREEN = graphics.create_pen(0, 255, 0);
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Pen BLUE = graphics.create_pen(0, 0, 255);
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I2C i2c(PICO_EXPLORER);
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BreakoutPotentiometer pot(&i2c);
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bool toggle = false;
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// HSV Conversion expects float inputs in the range of 0.00-1.00 for each channel
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// Outputs are rgb in the range 0-255 for each channel
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void from_hsv(float h, float s, float v, uint8_t &r, uint8_t &g, uint8_t &b) {
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float i = floor(h * 6.0f);
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float f = h * 6.0f - i;
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v *= 255.0f;
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uint8_t p = v * (1.0f - s);
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uint8_t q = v * (1.0f - f * s);
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uint8_t t = v * (1.0f - (1.0f - f) * s);
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switch (int(i) % 6) {
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case 0: r = v; g = t; b = p; break;
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case 1: r = q; g = v; b = p; break;
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case 2: r = p; g = v; b = t; break;
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case 3: r = p; g = q; b = v; break;
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case 4: r = t; g = p; b = v; break;
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case 5: r = v; g = p; b = q; break;
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}
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}
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int main() {
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#ifdef PICO_DEFAULT_LED_PIN
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gpio_init(PICO_DEFAULT_LED_PIN);
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gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
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#endif
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stdio_init_all();
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printf("Starting...\n");
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if(pot.init()) {
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printf("Potentiometer found...\n");
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while(true) {
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#ifdef PICO_DEFAULT_LED_PIN
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gpio_put(PICO_DEFAULT_LED_PIN, toggle);
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#endif
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toggle = !toggle;
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float percent = pot.read();
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printf("Percent: %d\n", (int)(percent * 100));
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uint8_t r = 0, g = 0, b = 0;
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from_hsv(percent, 1.0f, 1.0f, r, g, b);
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pot.set_led(r, g, b);
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graphics.set_pen(BLACK);
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graphics.clear();
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{
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graphics.set_pen(RED);
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std::ostringstream ss;
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ss << "R = ";
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ss << (int)r;
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std::string s(ss.str());
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graphics.text(s, Point(10, 10), 220, 6);
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}
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{
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graphics.set_pen(GREEN);
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std::ostringstream ss;
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ss << "G = ";
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ss << (int)g;
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std::string s(ss.str());
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graphics.text(s, Point(10, 70), 220, 6);
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}
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{
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graphics.set_pen(BLUE);
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std::ostringstream ss;
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ss << "B = ";
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ss << (int)b;
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std::string s(ss.str());
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graphics.text(s, Point(10, 130), 220, 6);
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}
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{
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// Shouldn't really use create_pen in-line.
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// In default (RGB332) palette mode this will lookup the nearest 8-bit colour
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graphics.set_pen(graphics.create_pen(r, g, b));
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std::ostringstream ss;
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ss << "#";
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ss << std::uppercase << std::hex << std::setfill('0') << std::setw(2) << (int)r;
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ss << std::uppercase << std::hex << std::setfill('0') << std::setw(2) << (int)g;
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ss << std::uppercase << std::hex << std::setfill('0') << std::setw(2) << (int)b;
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std::string s(ss.str());
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graphics.text(s, Point(10, 190), 220, 5);
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}
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st7789.update(&graphics);
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}
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}
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else {
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printf("No Potentiometer found :'(\n");
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#ifdef PICO_DEFAULT_LED_PIN
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gpio_put(PICO_DEFAULT_LED_PIN, true);
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#endif
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}
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return 0;
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}
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