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// Copyright 2021 Paul Cotter (@gr1mr3aver)
// Copyright 2021-2023 Nick Brassel (@tzarc)
// Copyright 2022 David Hoelscher (@customMK)
// SPDX-License-Identifier: GPL-2.0-or-later
#include "qp_internal.h"
#include "qp_comms.h"
#include "qp_st7735.h"
#include "qp_st77xx_opcodes.h"
#include "qp_st7735_opcodes.h"
#include "qp_tft_panel.h"
#ifdef QUANTUM_PAINTER_ST7735_SPI_ENABLE
# include "qp_comms_spi.h"
#endif // QUANTUM_PAINTER_ST7735_SPI_ENABLE
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Common
// Driver storage
tft_panel_dc_reset_painter_device_t st7735_drivers[ST7735_NUM_DEVICES] = {0};
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Automatic viewport offsets
#ifndef ST7735_NO_AUTOMATIC_OFFSETS
static inline void st7735_automatic_viewport_offsets(painter_device_t device, painter_rotation_t rotation) {
painter_driver_t *driver = (painter_driver_t *)device;
// clang-format off
const struct {
uint16_t offset_x;
uint16_t offset_y;
} rotation_offsets_80x160[] = {
[QP_ROTATION_0] = { .offset_x = 24, .offset_y = 0 },
[QP_ROTATION_90] = { .offset_x = 0, .offset_y = 24 },
[QP_ROTATION_180] = { .offset_x = 24, .offset_y = 0 },
[QP_ROTATION_270] = { .offset_x = 0, .offset_y = 24 },
};
// clang-format on
if (driver->panel_width == 80 && driver->panel_height == 160) {
driver->offset_x = rotation_offsets_80x160[rotation].offset_x;
driver->offset_y = rotation_offsets_80x160[rotation].offset_y;
}
}
#endif // ST7735_NO_AUTOMATIC_OFFSETS
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Initialization
__attribute__((weak)) bool qp_st7735_init(painter_device_t device, painter_rotation_t rotation) {
// clang-format off
const uint8_t st7735_init_sequence[] = {
// Command, Delay, N, Data[N]
ST77XX_CMD_RESET, 120, 0,
ST77XX_CMD_SLEEP_OFF, 5, 0,
ST77XX_SET_PIX_FMT, 0, 1, 0x55,
ST77XX_CMD_INVERT_OFF, 0, 0,
ST77XX_CMD_NORMAL_ON, 0, 0,
ST77XX_CMD_DISPLAY_ON, 20, 0
};
// clang-format on
qp_comms_bulk_command_sequence(device, st7735_init_sequence, sizeof(st7735_init_sequence));
// Configure the rotation (i.e. the ordering and direction of memory writes in GRAM)
const uint8_t madctl[] = {
[QP_ROTATION_0] = ST77XX_MADCTL_BGR,
[QP_ROTATION_90] = ST77XX_MADCTL_BGR | ST77XX_MADCTL_MX | ST77XX_MADCTL_MV,
[QP_ROTATION_180] = ST77XX_MADCTL_BGR | ST77XX_MADCTL_MX | ST77XX_MADCTL_MY,
[QP_ROTATION_270] = ST77XX_MADCTL_BGR | ST77XX_MADCTL_MV | ST77XX_MADCTL_MY,
};
qp_comms_command_databyte(device, ST77XX_SET_MADCTL, madctl[rotation]);
#ifndef ST7735_NO_AUTOMATIC_VIEWPORT_OFFSETS
st7735_automatic_viewport_offsets(device, rotation);
#endif // ST7735_NO_AUTOMATIC_VIEWPORT_OFFSETS
return true;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Driver vtable
const tft_panel_dc_reset_painter_driver_vtable_t st7735_driver_vtable = {
.base =
{
.init = qp_st7735_init,
.power = qp_tft_panel_power,
.clear = qp_tft_panel_clear,
.flush = qp_tft_panel_flush,
.pixdata = qp_tft_panel_pixdata,
.viewport = qp_tft_panel_viewport,
.palette_convert = qp_tft_panel_palette_convert_rgb565_swapped,
.append_pixels = qp_tft_panel_append_pixels_rgb565,
.append_pixdata = qp_tft_panel_append_pixdata,
},
.num_window_bytes = 2,
.swap_window_coords = false,
.opcodes =
{
.display_on = ST77XX_CMD_DISPLAY_ON,
.display_off = ST77XX_CMD_DISPLAY_OFF,
.set_column_address = ST77XX_SET_COL_ADDR,
.set_row_address = ST77XX_SET_ROW_ADDR,
.enable_writes = ST77XX_SET_MEM,
},
};
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// SPI
#ifdef QUANTUM_PAINTER_ST7735_SPI_ENABLE
// Factory function for creating a handle to the ST7735 device
painter_device_t qp_st7735_make_spi_device(uint16_t panel_width, uint16_t panel_height, pin_t chip_select_pin, pin_t dc_pin, pin_t reset_pin, uint16_t spi_divisor, int spi_mode) {
for (uint32_t i = 0; i < ST7735_NUM_DEVICES; ++i) {
tft_panel_dc_reset_painter_device_t *driver = &st7735_drivers[i];
if (!driver->base.driver_vtable) {
driver->base.driver_vtable = (const painter_driver_vtable_t *)&st7735_driver_vtable;
driver->base.comms_vtable = (const painter_comms_vtable_t *)&spi_comms_with_dc_vtable;
driver->base.panel_width = panel_width;
driver->base.panel_height = panel_height;
driver->base.rotation = QP_ROTATION_0;
driver->base.offset_x = 0;
driver->base.offset_y = 0;
driver->base.native_bits_per_pixel = 16; // RGB565
// SPI and other pin configuration
driver->base.comms_config = &driver->spi_dc_reset_config;
driver->spi_dc_reset_config.spi_config.chip_select_pin = chip_select_pin;
driver->spi_dc_reset_config.spi_config.divisor = spi_divisor;
driver->spi_dc_reset_config.spi_config.lsb_first = false;
driver->spi_dc_reset_config.spi_config.mode = spi_mode;
driver->spi_dc_reset_config.dc_pin = dc_pin;
driver->spi_dc_reset_config.reset_pin = reset_pin;
driver->spi_dc_reset_config.command_params_uses_command_pin = false;
if (!qp_internal_register_device((painter_device_t)driver)) {
memset(driver, 0, sizeof(tft_panel_dc_reset_painter_device_t));
return NULL;
}
return (painter_device_t)driver;
}
}
return NULL;
}
#endif // QUANTUM_PAINTER_ST7735_SPI_ENABLE
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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