86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
#include <math.h>
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#include <string.h>
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#include "hardware/gpio.h" // Workaround SDK bug - https://github.com/raspberrypi/pico-sdk/issues/3
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#include "hardware/pwm.h"
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#include "pico_display_2.hpp"
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namespace pimoroni {
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PicoDisplay2::PicoDisplay2(void *buf)
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: PicoGraphics(WIDTH, HEIGHT, buf), screen(WIDTH, HEIGHT, false, buf,
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PIMORONI_SPI_DEFAULT_INSTANCE, SPI_BG_FRONT_CS, SPI_DEFAULT_MISO, SPI_DEFAULT_SCK, SPI_DEFAULT_MOSI, SPI_BG_FRONT_PWM) {
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__fb = buf;
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}
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PicoDisplay2::PicoDisplay2(void *buf, int width, int height)
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: PicoGraphics(width, height, buf), screen(width, height, false, buf,
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PIMORONI_SPI_DEFAULT_INSTANCE, SPI_BG_FRONT_CS, SPI_DEFAULT_MISO, SPI_DEFAULT_SCK, SPI_DEFAULT_MOSI, SPI_BG_FRONT_PWM) {
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__fb = buf;
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}
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void PicoDisplay2::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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}
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void PicoDisplay2::update() {
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screen.update();
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}
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void PicoDisplay2::set_backlight(uint8_t brightness) {
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screen.set_backlight(brightness);
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}
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void PicoDisplay2::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 PicoDisplay2::is_pressed(uint8_t button) {
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return !gpio_get(button);
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}
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void PicoDisplay2::flip() {
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screen.flip();
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}
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}
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