pimoroni-pico/libraries/pico_display/pico_display.cpp

91 wiersze
2.6 KiB
C++

#include <math.h>
#include <string.h>
#include "hardware/gpio.h" // Workaround SDK bug - https://github.com/raspberrypi/pico-sdk/issues/3
#include "hardware/pwm.h"
#include "pico_display.hpp"
const uint8_t LED_R = 6;
const uint8_t LED_G = 7;
const uint8_t LED_B = 8;
namespace pimoroni {
PicoDisplay::PicoDisplay(uint16_t *buf)
: PicoGraphics(WIDTH, HEIGHT, buf), screen(WIDTH, HEIGHT, buf) {
__fb = buf;
}
PicoDisplay::PicoDisplay(uint16_t *buf, int width, int height)
: PicoGraphics(width, height, buf), screen(width, height, buf) {
__fb = buf;
}
void PicoDisplay::init() {
// setup the rgb led for pwm control
pwm_config cfg = pwm_get_default_config();
pwm_config_set_output_polarity(&cfg, true, true);
// red
pwm_set_wrap(pwm_gpio_to_slice_num(LED_R), 65535);
pwm_init(pwm_gpio_to_slice_num(LED_R), &cfg, true);
gpio_set_function(LED_R, GPIO_FUNC_PWM);
// green
pwm_set_wrap(pwm_gpio_to_slice_num(LED_G), 65535);
pwm_init(pwm_gpio_to_slice_num(LED_G), &cfg, true);
gpio_set_function(LED_G, GPIO_FUNC_PWM);
// blue
pwm_set_wrap(pwm_gpio_to_slice_num(LED_B), 65535);
pwm_init(pwm_gpio_to_slice_num(LED_B), &cfg, true);
gpio_set_function(LED_B, GPIO_FUNC_PWM);
// setup button inputs
gpio_set_function(A, GPIO_FUNC_SIO); gpio_set_dir(A, GPIO_IN); gpio_pull_up(A);
gpio_set_function(B, GPIO_FUNC_SIO); gpio_set_dir(B, GPIO_IN); gpio_pull_up(B);
gpio_set_function(X, GPIO_FUNC_SIO); gpio_set_dir(X, GPIO_IN); gpio_pull_up(X);
gpio_set_function(Y, GPIO_FUNC_SIO); gpio_set_dir(Y, GPIO_IN); gpio_pull_up(Y);
// initialise the screen
screen.init();
}
void PicoDisplay::update() {
screen.update();
}
void PicoDisplay::set_backlight(uint8_t brightness) {
screen.set_backlight(brightness);
}
void PicoDisplay::set_led(uint8_t r, uint8_t g, uint8_t b) {
// gamma correct the provided 0-255 brightness value onto a
// 0-65535 range for the pwm counter
static const float gamma = 2.8;
uint16_t value;
// red
value = (uint16_t)(pow((float)(r) / 255.0f, gamma) * 65535.0f + 0.5f);
pwm_set_gpio_level(LED_R, value);
// green
value = (uint16_t)(pow((float)(g) / 255.0f, gamma) * 65535.0f + 0.5f);
pwm_set_gpio_level(LED_G, value);
// blue
value = (uint16_t)(pow((float)(b) / 255.0f, gamma) * 65535.0f + 0.5f);
pwm_set_gpio_level(LED_B, value);
}
bool PicoDisplay::is_pressed(uint8_t button) {
return !gpio_get(button);
}
void PicoDisplay::flip() {
screen.flip();
}
}