summaryrefslogtreecommitdiff
path: root/drivers/painter/st77xx/qp_st7789.c
blob: d005ece050e9e353309c7f56bf136342d192de3e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
// Copyright 2021 Paul Cotter (@gr1mr3aver)
// Copyright 2021 Nick Brassel (@tzarc)
// SPDX-License-Identifier: GPL-2.0-or-later

#include "qp_internal.h"
#include "qp_comms.h"
#include "qp_st7789.h"
#include "qp_st77xx_opcodes.h"
#include "qp_st7789_opcodes.h"
#include "qp_tft_panel.h"

#ifdef QUANTUM_PAINTER_ST7789_SPI_ENABLE
#    include "qp_comms_spi.h"
#endif // QUANTUM_PAINTER_ST7789_SPI_ENABLE

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Common

// Driver storage
tft_panel_dc_reset_painter_device_t st7789_drivers[ST7789_NUM_DEVICES] = {0};

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Automatic viewport offsets

#ifndef ST7789_NO_AUTOMATIC_OFFSETS
static inline void st7789_automatic_viewport_offsets(painter_device_t device, painter_rotation_t rotation) {
    struct painter_driver_t *driver = (struct painter_driver_t *)device;

    // clang-format off
    const struct {
        uint16_t offset_x;
        uint16_t offset_y;
    } rotation_offsets_240x240[] = {
        [QP_ROTATION_0]   = { .offset_x =  0, .offset_y =  0 },
        [QP_ROTATION_90]  = { .offset_x =  0, .offset_y =  0 },
        [QP_ROTATION_180] = { .offset_x =  0, .offset_y = 80 },
        [QP_ROTATION_270] = { .offset_x = 80, .offset_y =  0 },
    };
    // clang-format on

    if (driver->panel_width == 240 && driver->panel_height == 240) {
        driver->offset_x = rotation_offsets_240x240[rotation].offset_x;
        driver->offset_y = rotation_offsets_240x240[rotation].offset_y;
    }
}
#endif // ST7789_NO_AUTOMATIC_OFFSETS

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Initialization

bool qp_st7789_init(painter_device_t device, painter_rotation_t rotation) {
    // clang-format off
    const uint8_t st7789_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_ON,          0,  0,
        ST77XX_CMD_NORMAL_ON,          0,  0,
        ST77XX_CMD_DISPLAY_ON,        20,  0
    };
    // clang-format on
    qp_comms_bulk_command_sequence(device, st7789_init_sequence, sizeof(st7789_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_RGB,
        [QP_ROTATION_90]  = ST77XX_MADCTL_RGB | ST77XX_MADCTL_MX | ST77XX_MADCTL_MV,
        [QP_ROTATION_180] = ST77XX_MADCTL_RGB | ST77XX_MADCTL_MX | ST77XX_MADCTL_MY,
        [QP_ROTATION_270] = ST77XX_MADCTL_RGB | ST77XX_MADCTL_MV | ST77XX_MADCTL_MY,
    };
    qp_comms_command_databyte(device, ST77XX_SET_MADCTL, madctl[rotation]);

#ifndef ST7789_NO_AUTOMATIC_VIEWPORT_OFFSETS
    st7789_automatic_viewport_offsets(device, rotation);
#endif // ST7789_NO_AUTOMATIC_VIEWPORT_OFFSETS

    return true;
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Driver vtable

const struct tft_panel_dc_reset_painter_driver_vtable_t st7789_driver_vtable = {
    .base =
        {
            .init            = qp_st7789_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,
            .append_pixels   = qp_tft_panel_append_pixels,
        },
    .rgb888_to_native16bit = qp_rgb888_to_rgb565_swapped,
    .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_ST7789_SPI_ENABLE

// Factory function for creating a handle to the ST7789 device
painter_device_t qp_st7789_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 < ST7789_NUM_DEVICES; ++i) {
        tft_panel_dc_reset_painter_device_t *driver = &st7789_drivers[i];
        if (!driver->base.driver_vtable) {
            driver->base.driver_vtable         = (const struct painter_driver_vtable_t *)&st7789_driver_vtable;
            driver->base.comms_vtable          = (const struct 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;
            return (painter_device_t)driver;
        }
    }
    return NULL;
}

#endif // QUANTUM_PAINTER_ST7789_SPI_ENABLE

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////