114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
#pragma once
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#include "hardware/spi.h"
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#include "hardware/gpio.h"
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namespace pimoroni {
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class ST7735 {
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//--------------------------------------------------
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// Constants
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//--------------------------------------------------
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public:
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static const uint8_t DEFAULT_CS_PIN = 17;
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static const uint8_t DEFAULT_DC_PIN = 16;
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static const uint8_t DEFAULT_SCK_PIN = 18;
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static const uint8_t DEFAULT_MOSI_PIN = 19;
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static const uint8_t DEFAULT_BL_PIN = 20;
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private:
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static const uint8_t ROWS = 162;
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static const uint8_t COLS = 132;
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//--------------------------------------------------
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// Enums
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//--------------------------------------------------
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public:
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enum BG_SPI_SLOT {
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BG_SPI_FRONT,
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BG_SPI_BACK
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};
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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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public:
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// frame buffer where pixel data is stored
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uint16_t *frame_buffer;
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private:
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spi_inst_t *spi = spi0;
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uint32_t dma_channel;
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// interface pins with our standard defaults where appropriate
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int8_t cs = DEFAULT_CS_PIN;
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int8_t dc = DEFAULT_DC_PIN;
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int8_t sck = DEFAULT_SCK_PIN;
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int8_t mosi = DEFAULT_MOSI_PIN;
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int8_t miso = -1; // we generally don't use this pin
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int8_t bl = DEFAULT_BL_PIN;
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int8_t vsync = -1; // only available on some products
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uint32_t spi_baud = 30 * 1024 * 1024;
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uint8_t offset_cols = 0;
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uint8_t offset_rows = 0;
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//--------------------------------------------------
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// Constructors/Destructor
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//--------------------------------------------------
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public:
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ST7735(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 BG_SPI_FRONT:
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cs = 17;
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bl = 20;
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break;
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case BG_SPI_BACK:
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cs = 22;
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bl = 21;
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break;
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}
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}
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ST7735(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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ST7735(uint16_t width, uint16_t height, uint16_t *frame_buffer,
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spi_inst_t *spi,
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uint8_t cs, uint8_t dc, uint8_t sck, uint8_t mosi, uint8_t miso = -1, uint8_t bl = -1) :
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width(width), height(height), frame_buffer(frame_buffer),
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spi(spi), cs(cs), dc(dc), sck(sck), mosi(mosi), miso(miso), bl(bl) {}
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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);
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spi_inst_t* get_spi() const;
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int get_cs() const;
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int get_dc() const;
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int get_sck() const;
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int get_mosi() const;
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int 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(bool dont_block = false);
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void set_backlight(uint8_t brightness);
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};
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}
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