88 lines
2.5 KiB
C++
88 lines
2.5 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 "../../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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uint16_t row_stride;
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uint32_t dma_channel;
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// interface pins with our standard defaults where appropriate
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uint cs = SPI_BG_FRONT_CS;
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uint dc = SPI_DEFAULT_MISO;
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uint sck = SPI_DEFAULT_SCK;
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uint mosi = SPI_DEFAULT_MOSI;
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uint miso = PIN_UNUSED; // used as data/command
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uint bl = SPI_BG_FRONT_PWM;
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uint vsync = PIN_UNUSED; // only available on some products
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uint32_t spi_baud = 16 * 1000 * 1000;
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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, uint16_t *frame_buffer, BG_SPI_SLOT slot) :
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width(width), height(height), frame_buffer(frame_buffer) {
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switch(slot) {
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case PICO_EXPLORER_ONBOARD:
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cs = SPI_BG_FRONT_CS;
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bl = PIN_UNUSED;
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break;
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case BG_SPI_FRONT:
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cs = SPI_BG_FRONT_CS;
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bl = SPI_BG_FRONT_PWM;
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break;
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case BG_SPI_BACK:
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cs = SPI_BG_BACK_CS;
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bl = SPI_BG_BACK_PWM;
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break;
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}
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}
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ST7789(uint16_t width, uint16_t height, uint16_t *frame_buffer) :
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width(width), height(height), frame_buffer(frame_buffer) {}
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ST7789(uint16_t width, uint16_t height, 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 miso = PIN_UNUSED, uint bl = PIN_UNUSED) :
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spi(spi),
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width(width), height(height),
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cs(cs), dc(dc), sck(sck), mosi(mosi), miso(miso), bl(bl), frame_buffer(frame_buffer) {}
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//--------------------------------------------------
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// Methods
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//--------------------------------------------------
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public:
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void init(bool auto_init_sequence = true, bool round = false);
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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 vsync_callback(gpio_irq_callback_t callback);
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void update(bool dont_block = false);
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void set_backlight(uint8_t brightness);
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void flip();
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};
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}
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