kopia lustrzana https://github.com/pimoroni/pimoroni-pico
81 wiersze
2.3 KiB
C++
81 wiersze
2.3 KiB
C++
#include <math.h>
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#include <string.h>
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#include "hardware/pwm.h"
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#include "pico_display.hpp"
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const uint8_t LED_R = 6;
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const uint8_t LED_G = 7;
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const uint8_t LED_B = 8;
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namespace pimoroni {
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PicoDisplay::PicoDisplay(uint16_t *buf)
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: PicoGraphics(WIDTH, HEIGHT, buf), screen(WIDTH, HEIGHT, buf) {
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__fb = buf;
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}
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void PicoDisplay::init() {
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// setup the rgb led for pwm control
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pwm_config cfg = pwm_get_default_config();
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pwm_config_set_output_polarity(&cfg, true, true);
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// red
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pwm_set_wrap(pwm_gpio_to_slice_num(LED_R), 65535);
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pwm_init(pwm_gpio_to_slice_num(LED_R), &cfg, true);
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gpio_set_function(LED_R, GPIO_FUNC_PWM);
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// green
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pwm_set_wrap(pwm_gpio_to_slice_num(LED_G), 65535);
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pwm_init(pwm_gpio_to_slice_num(LED_G), &cfg, true);
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gpio_set_function(LED_G, GPIO_FUNC_PWM);
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// blue
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pwm_set_wrap(pwm_gpio_to_slice_num(LED_B), 65535);
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pwm_init(pwm_gpio_to_slice_num(LED_B), &cfg, true);
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gpio_set_function(LED_B, GPIO_FUNC_PWM);
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// setup button inputs
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gpio_set_function(A, GPIO_FUNC_SIO); gpio_set_dir(A, GPIO_IN); gpio_pull_up(A);
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gpio_set_function(B, GPIO_FUNC_SIO); gpio_set_dir(B, GPIO_IN); gpio_pull_up(B);
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gpio_set_function(X, GPIO_FUNC_SIO); gpio_set_dir(X, GPIO_IN); gpio_pull_up(X);
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gpio_set_function(Y, GPIO_FUNC_SIO); gpio_set_dir(Y, GPIO_IN); gpio_pull_up(Y);
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// initialise the screen
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screen.init();
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}
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void PicoDisplay::update() {
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screen.update();
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}
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void PicoDisplay::set_backlight(uint8_t brightness) {
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screen.set_backlight(brightness);
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}
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void PicoDisplay::set_led(uint8_t r, uint8_t g, uint8_t b) {
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// gamma correct the provided 0-255 brightness value onto a
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// 0-65535 range for the pwm counter
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static const float gamma = 2.8;
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uint16_t value;
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// red
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value = (uint16_t)(pow((float)(r) / 255.0f, gamma) * 65535.0f + 0.5f);
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pwm_set_gpio_level(LED_R, value);
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// green
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value = (uint16_t)(pow((float)(g) / 255.0f, gamma) * 65535.0f + 0.5f);
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pwm_set_gpio_level(LED_G, value);
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// blue
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value = (uint16_t)(pow((float)(b) / 255.0f, gamma) * 65535.0f + 0.5f);
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pwm_set_gpio_level(LED_B, value);
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}
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bool PicoDisplay::is_pressed(uint8_t button) {
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return !gpio_get(button);
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}
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} |