diff options
Diffstat (limited to 'drivers/painter/st77xx/qp_st7735.c')
| -rw-r--r-- | drivers/painter/st77xx/qp_st7735.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/painter/st77xx/qp_st7735.c b/drivers/painter/st77xx/qp_st7735.c new file mode 100644 index 0000000000..e434e31b92 --- /dev/null +++ b/drivers/painter/st77xx/qp_st7735.c @@ -0,0 +1,144 @@ +// Copyright 2021 Paul Cotter (@gr1mr3aver) +// Copyright 2021 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) { + 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_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 + +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 struct 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, + }, + .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 struct painter_driver_vtable_t *)&st7735_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_ST7735_SPI_ENABLE + +////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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