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154 lines
6.8 KiB
154 lines
6.8 KiB
// Copyright 2021 Paul Cotter (@gr1mr3aver)
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// Copyright 2021-2023 Nick Brassel (@tzarc)
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// Copyright 2022 David Hoelscher (@customMK)
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "qp_internal.h"
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#include "qp_comms.h"
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#include "qp_st7735.h"
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#include "qp_st77xx_opcodes.h"
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#include "qp_st7735_opcodes.h"
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#include "qp_tft_panel.h"
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#ifdef QUANTUM_PAINTER_ST7735_SPI_ENABLE
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# include "qp_comms_spi.h"
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#endif // QUANTUM_PAINTER_ST7735_SPI_ENABLE
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Common
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// Driver storage
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tft_panel_dc_reset_painter_device_t st7735_drivers[ST7735_NUM_DEVICES] = {0};
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Automatic viewport offsets
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#ifndef ST7735_NO_AUTOMATIC_OFFSETS
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static inline void st7735_automatic_viewport_offsets(painter_device_t device, painter_rotation_t rotation) {
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painter_driver_t *driver = (painter_driver_t *)device;
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// clang-format off
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const struct {
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uint16_t offset_x;
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uint16_t offset_y;
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} rotation_offsets_80x160[] = {
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[QP_ROTATION_0] = { .offset_x = 24, .offset_y = 0 },
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[QP_ROTATION_90] = { .offset_x = 0, .offset_y = 24 },
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[QP_ROTATION_180] = { .offset_x = 24, .offset_y = 0 },
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[QP_ROTATION_270] = { .offset_x = 0, .offset_y = 24 },
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};
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// clang-format on
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if (driver->panel_width == 80 && driver->panel_height == 160) {
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driver->offset_x = rotation_offsets_80x160[rotation].offset_x;
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driver->offset_y = rotation_offsets_80x160[rotation].offset_y;
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}
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}
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#endif // ST7735_NO_AUTOMATIC_OFFSETS
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Initialization
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__attribute__((weak)) bool qp_st7735_init(painter_device_t device, painter_rotation_t rotation) {
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// clang-format off
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const uint8_t st7735_init_sequence[] = {
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// Command, Delay, N, Data[N]
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ST77XX_CMD_RESET, 120, 0,
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ST77XX_CMD_SLEEP_OFF, 5, 0,
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ST77XX_SET_PIX_FMT, 0, 1, 0x55,
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ST77XX_CMD_INVERT_OFF, 0, 0,
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ST77XX_CMD_NORMAL_ON, 0, 0,
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ST7735_SET_PGAMMA, 0, 16, 0x02, 0x1C, 0x07, 0x12, 0x37, 0x32, 0x29, 0x2D, 0x29, 0x25, 0x2B, 0x39, 0x00, 0x01, 0x03, 0x10,
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ST7735_SET_NGAMMA, 0, 16, 0x03, 0x1D, 0x07, 0x06, 0x2E, 0x2C, 0x29, 0x2D, 0x2E, 0x2E, 0x37, 0x3F, 0x00, 0x00, 0x02, 0x10,
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ST77XX_CMD_DISPLAY_ON, 20, 0
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};
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// clang-format on
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qp_comms_bulk_command_sequence(device, st7735_init_sequence, sizeof(st7735_init_sequence));
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// Configure the rotation (i.e. the ordering and direction of memory writes in GRAM)
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const uint8_t madctl[] = {
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[QP_ROTATION_0] = ST77XX_MADCTL_BGR,
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[QP_ROTATION_90] = ST77XX_MADCTL_BGR | ST77XX_MADCTL_MX | ST77XX_MADCTL_MV,
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[QP_ROTATION_180] = ST77XX_MADCTL_BGR | ST77XX_MADCTL_MX | ST77XX_MADCTL_MY,
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[QP_ROTATION_270] = ST77XX_MADCTL_BGR | ST77XX_MADCTL_MV | ST77XX_MADCTL_MY,
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};
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qp_comms_command_databyte(device, ST77XX_SET_MADCTL, madctl[rotation]);
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#ifndef ST7735_NO_AUTOMATIC_VIEWPORT_OFFSETS
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st7735_automatic_viewport_offsets(device, rotation);
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#endif // ST7735_NO_AUTOMATIC_VIEWPORT_OFFSETS
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Driver vtable
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const tft_panel_dc_reset_painter_driver_vtable_t st7735_driver_vtable = {
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.base =
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{
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.init = qp_st7735_init,
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.power = qp_tft_panel_power,
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.clear = qp_tft_panel_clear,
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.flush = qp_tft_panel_flush,
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.pixdata = qp_tft_panel_pixdata,
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.viewport = qp_tft_panel_viewport,
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.palette_convert = qp_tft_panel_palette_convert_rgb565_swapped,
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.append_pixels = qp_tft_panel_append_pixels_rgb565,
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.append_pixdata = qp_tft_panel_append_pixdata,
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},
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.num_window_bytes = 2,
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.swap_window_coords = false,
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.opcodes =
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{
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.display_on = ST77XX_CMD_DISPLAY_ON,
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.display_off = ST77XX_CMD_DISPLAY_OFF,
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.set_column_address = ST77XX_SET_COL_ADDR,
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.set_row_address = ST77XX_SET_ROW_ADDR,
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.enable_writes = ST77XX_SET_MEM,
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},
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// SPI
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#ifdef QUANTUM_PAINTER_ST7735_SPI_ENABLE
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// Factory function for creating a handle to the ST7735 device
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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) {
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for (uint32_t i = 0; i < ST7735_NUM_DEVICES; ++i) {
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tft_panel_dc_reset_painter_device_t *driver = &st7735_drivers[i];
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if (!driver->base.driver_vtable) {
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driver->base.driver_vtable = (const painter_driver_vtable_t *)&st7735_driver_vtable;
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driver->base.comms_vtable = (const painter_comms_vtable_t *)&spi_comms_with_dc_vtable;
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driver->base.panel_width = panel_width;
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driver->base.panel_height = panel_height;
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driver->base.rotation = QP_ROTATION_0;
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driver->base.offset_x = 0;
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driver->base.offset_y = 0;
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driver->base.native_bits_per_pixel = 16; // RGB565
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// SPI and other pin configuration
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driver->base.comms_config = &driver->spi_dc_reset_config;
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driver->spi_dc_reset_config.spi_config.chip_select_pin = chip_select_pin;
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driver->spi_dc_reset_config.spi_config.divisor = spi_divisor;
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driver->spi_dc_reset_config.spi_config.lsb_first = false;
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driver->spi_dc_reset_config.spi_config.mode = spi_mode;
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driver->spi_dc_reset_config.dc_pin = dc_pin;
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driver->spi_dc_reset_config.reset_pin = reset_pin;
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driver->spi_dc_reset_config.command_params_uses_command_pin = false;
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if (!qp_internal_register_device((painter_device_t)driver)) {
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memset(driver, 0, sizeof(tft_panel_dc_reset_painter_device_t));
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return NULL;
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}
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return (painter_device_t)driver;
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}
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}
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return NULL;
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}
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#endif // QUANTUM_PAINTER_ST7735_SPI_ENABLE
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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