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LGFX_ESP8266_ESPboy.hpp
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LGFX_ESP8266_ESPboy.hpp
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#pragma once
#define LGFX_USE_V1
#include <LovyanGFX.hpp>
// LGFX for ESP boy
class LGFX : public lgfx::LGFX_Device
{
struct Panel_ESPboy : public lgfx::Panel_ST7735S
{
static constexpr int i2c_freq = 400000;
static constexpr int pin_sda = 4;
static constexpr int pin_scl = 5;
static constexpr int port = 0;
// for CS control
static constexpr int MCP23017_ADDR = 0x20;
static constexpr int MCP23017_GPIO_B = 0x13;
static constexpr int MCP23017_IODIR_B = 0x01;
// for Backlight control
static constexpr int MCP4725_ADDR = 0x60;
void init_cs(void) override
{
lgfx::i2c::init(port, pin_sda, pin_scl);
// MCP23017 PortB bit0 = CS. set to output.
lgfx::i2c::writeRegister8(port, MCP23017_ADDR, MCP23017_IODIR_B, 0x00, 0xFE, i2c_freq);
cs_control(true);
}
void cs_control(bool level) override
{
// MCP23017 PortB bit0 = CS. set level
lgfx::i2c::writeRegister8(port, MCP23017_ADDR, MCP23017_GPIO_B, level, 0xFE, i2c_freq);
}
void setBrightness(uint8_t brightness) override
{
if (brightness)
{
brightness = (128+brightness) >> 2;
}
uint8_t buf[2];
buf[0] = brightness>>4;
buf[1] = brightness>>4 | brightness<<4;
lgfx::i2c::transactionWrite(port, MCP4725_ADDR, buf, 2, i2c_freq);
}
};
Panel_ESPboy _panel_instance;
lgfx::Bus_SPI _bus_instance;
public:
LGFX(void)
{
{
auto cfg = _bus_instance.config();
cfg.spi_mode = 0;
cfg.spi_3wire = true;
cfg.freq_write = 30000000;
cfg.freq_read = 8000000;
cfg.pin_sclk = 14;
cfg.pin_mosi = 13;
cfg.pin_miso = 12;
cfg.pin_dc = 16;
_bus_instance.config(cfg);
_panel_instance.setBus(&_bus_instance);
}
{
auto cfg = _panel_instance.config();
cfg.memory_width = 132;
cfg.memory_height = 132;
cfg.panel_width = 128;
cfg.panel_height = 128;
cfg.offset_x = 2;
cfg.offset_y = 1;
cfg.offset_rotation = 2;
cfg.dummy_read_pixel = 9;
cfg.dummy_read_bits = 1;
cfg.readable = true;
cfg.bus_shared = false;
_panel_instance.config(cfg);
}
setPanel(&_panel_instance);
}
};