kopia lustrzana https://github.com/pimoroni/pimoroni-pico
121 wiersze
3.1 KiB
C++
121 wiersze
3.1 KiB
C++
#pragma once
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#include "hardware/spi.h"
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#include "hardware/gpio.h"
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#include "hardware/pwm.h"
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#include "../../common/pimoroni_common.hpp"
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namespace pimoroni {
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class ST7789 {
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spi_inst_t *spi = PIMORONI_SPI_DEFAULT_INSTANCE;
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//--------------------------------------------------
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// Variables
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//--------------------------------------------------
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private:
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// screen properties
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uint16_t width;
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uint16_t height;
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bool round;
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// interface pins with our standard defaults where appropriate
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uint cs;
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uint dc;
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uint sck;
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uint mosi;
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uint bl;
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uint vsync = PIN_UNUSED; // only available on some products
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// The ST7789 requires 16 ns between SPI rising edges.
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// 16 ns = 62,500,000 Hz
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static const uint32_t SPI_BAUD = 62'500'000;
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public:
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// frame buffer where pixel data is stored
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uint16_t *frame_buffer;
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ST7789(uint16_t width, uint16_t height, bool round, uint16_t *frame_buffer,
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spi_inst_t *spi,
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uint cs, uint dc, uint sck, uint mosi, uint bl = PIN_UNUSED) :
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spi(spi),
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width(width), height(height), round(round),
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cs(cs), dc(dc), sck(sck), mosi(mosi), bl(bl), frame_buffer(frame_buffer) {
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if(!this->frame_buffer) {
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this->frame_buffer = new uint16_t[width * height];
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}
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// configure spi interface and pins
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spi_init(spi, SPI_BAUD);
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gpio_set_function(dc, GPIO_FUNC_SIO);
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gpio_set_dir(dc, GPIO_OUT);
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gpio_set_function(cs, GPIO_FUNC_SIO);
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gpio_set_dir(cs, GPIO_OUT);
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gpio_set_function(sck, GPIO_FUNC_SPI);
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gpio_set_function(mosi, GPIO_FUNC_SPI);
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// if a backlight pin is provided then set it up for
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// pwm control
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if(bl != PIN_UNUSED) {
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pwm_config cfg = pwm_get_default_config();
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pwm_set_wrap(pwm_gpio_to_slice_num(bl), 65535);
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pwm_init(pwm_gpio_to_slice_num(bl), &cfg, true);
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gpio_set_function(bl, GPIO_FUNC_PWM);
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set_backlight(0); // Turn backlight off initially to avoid nasty surprises
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}
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}
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//--------------------------------------------------
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// Methods
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//--------------------------------------------------
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public:
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void init();
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void configure_display(bool rotate180);
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spi_inst_t* get_spi() const;
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uint get_cs() const;
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uint get_dc() const;
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uint get_sck() const;
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uint get_mosi() const;
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uint get_bl() const;
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void command(uint8_t command, size_t len = 0, const char *data = NULL);
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void update();
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void set_backlight(uint8_t brightness);
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void flip();
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static uint get_slot_cs(BG_SPI_SLOT slot) {
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switch(slot) {
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case PICO_EXPLORER_ONBOARD:
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return SPI_BG_FRONT_CS;
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case BG_SPI_FRONT:
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return SPI_BG_FRONT_CS;
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case BG_SPI_BACK:
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return SPI_BG_BACK_CS;
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}
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return PIN_UNUSED;
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};
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static uint get_slot_bl(BG_SPI_SLOT slot) {
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switch(slot) {
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case PICO_EXPLORER_ONBOARD:
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return PIN_UNUSED;
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case BG_SPI_FRONT:
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return SPI_BG_FRONT_PWM;
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case BG_SPI_BACK:
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return SPI_BG_BACK_PWM;
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}
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return PIN_UNUSED;
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};
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};
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}
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