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LVGL driver for ST7796S display #3422

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2f5deba
lvgl/st7796s: Add initial support for ST7796S TFT
kasjer May 19, 2025
56920b6
lvgl/drivers: Fix flush after rotation
kasjer May 19, 2025
0708c39
lvgl/ili9341: Remove unused dependency
kasjer May 20, 2025
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2 changes: 2 additions & 0 deletions hw/drivers/display/lvgl/pkg.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,8 @@ pkg.deps.LVGL_ST7735S:
- "@apache-mynewt-core/hw/drivers/display/lvgl/tft/st7735s"
pkg.deps.LVGL_ST7789:
- "@apache-mynewt-core/hw/drivers/display/lvgl/tft/st7789"
pkg.deps.LVGL_ST7796S:
- "@apache-mynewt-core/hw/drivers/display/lvgl/tft/st7796S"

pkg.deps.LVGL_CST816S:
- "@apache-mynewt-core/hw/drivers/display/lvgl/indev/cst816s"
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3 changes: 3 additions & 0 deletions hw/drivers/display/lvgl/syscfg.yml
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Expand Up @@ -37,6 +37,9 @@ syscfg.defs:
LVGL_ST7789:
description: Enable ST7789 display driver.
value:
LVGL_ST7796S:
description: Enable ST7796S display driver.
value:
LVGL_XPT2046:
description: Enable XPT2046 touchscreen driver.
value:
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3 changes: 0 additions & 3 deletions hw/drivers/display/lvgl/tft/ili9341/pkg.yml
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Expand Up @@ -23,6 +23,3 @@ pkg.homepage: "http://mynewt.apache.org/"
pkg.keywords:

pkg.cflags:

pkg.deps:
- "@apache-mynewt-core/hw/bus/drivers/spi_common"
13 changes: 8 additions & 5 deletions hw/drivers/display/lvgl/tft/ili9341/src/ili9341.c
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Expand Up @@ -132,9 +132,9 @@

static const uint8_t madctl[] = {
MADCTL_MX,
MADCTL_MX | MADCTL_MY | MADCTL_MV,
MADCTL_MY,
MADCTL_MV,
MADCTL_MY,
MADCTL_MX | MADCTL_MY | MADCTL_MV,
};

void
Expand Down Expand Up @@ -231,17 +231,20 @@ void
ili9341_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p)
{
uint8_t cmd[5];
lv_disp_t *disp = lv_disp_get_default();
lv_coord_t hor_res = lv_disp_get_hor_res(disp);
lv_coord_t ver_res = lv_disp_get_ver_res(disp);

if (area->x2 < 0 || area->y2 < 0 || area->x1 >= ILI9341_HOR_RES || area->y1 >= ILI9341_VER_RES) {
if (area->x2 < 0 || area->y2 < 0 || area->x1 >= hor_res || area->y1 >= ver_res) {
lv_disp_flush_ready(drv);
return;
}

/* Truncate the area to the screen */
int32_t act_x1 = area->x1 < 0 ? 0 : area->x1;
int32_t act_y1 = area->y1 < 0 ? 0 : area->y1;
int32_t act_x2 = area->x2 >= ILI9341_HOR_RES ? ILI9341_HOR_RES - 1 : area->x2;
int32_t act_y2 = area->y2 >= ILI9341_VER_RES ? ILI9341_VER_RES - 1 : area->y2;
int32_t act_x2 = area->x2 >= hor_res ? hor_res - 1 : area->x2;
int32_t act_y2 = area->y2 >= ver_res ? ver_res - 1 : area->y2;

/* Column address */
cmd[0] = ILI9341_CASET;
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9 changes: 6 additions & 3 deletions hw/drivers/display/lvgl/tft/ili9486/src/ili9486.c
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Expand Up @@ -190,17 +190,20 @@ void
ili9486_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p)
{
uint8_t cmd[5];
lv_disp_t *disp = lv_disp_get_default();
lv_coord_t hor_res = lv_disp_get_hor_res(disp);
lv_coord_t ver_res = lv_disp_get_ver_res(disp);

if (area->x2 < 0 || area->y2 < 0 || area->x1 >= ILI9486_HOR_RES || area->y1 >= ILI9486_VER_RES) {
if (area->x2 < 0 || area->y2 < 0 || area->x1 >= hor_res || area->y1 >= ver_res) {
lv_disp_flush_ready(drv);
return;
}

/* Truncate the area to the screen */
int32_t act_x1 = area->x1 < 0 ? 0 : area->x1;
int32_t act_y1 = area->y1 < 0 ? 0 : area->y1;
int32_t act_x2 = area->x2 >= ILI9486_HOR_RES ? ILI9486_HOR_RES - 1 : area->x2;
int32_t act_y2 = area->y2 >= ILI9486_VER_RES ? ILI9486_VER_RES - 1 : area->y2;
int32_t act_x2 = area->x2 >= hor_res ? hor_res - 1 : area->x2;
int32_t act_y2 = area->y2 >= ver_res ? ver_res - 1 : area->y2;

/* Column address */
cmd[0] = ILI9486_CASET;
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9 changes: 6 additions & 3 deletions hw/drivers/display/lvgl/tft/st7735s/src/st7735s.c
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Original file line number Diff line number Diff line change
Expand Up @@ -183,17 +183,20 @@ void
st7735s_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p)
{
uint8_t cmd[5];
lv_disp_t *disp = lv_disp_get_default();
lv_coord_t hor_res = lv_disp_get_hor_res(disp);
lv_coord_t ver_res = lv_disp_get_ver_res(disp);

if (area->x2 < 0 || area->y2 < 0 || area->x1 >= ST7735S_HOR_RES || area->y1 >= ST7735S_VER_RES) {
if (area->x2 < 0 || area->y2 < 0 || area->x1 >= hor_res || area->y1 >= ver_res) {
lv_disp_flush_ready(drv);
return;
}

/* Truncate the area to the screen */
int32_t act_x1 = area->x1 < 0 ? 0 : area->x1;
int32_t act_y1 = area->y1 < 0 ? 0 : area->y1;
int32_t act_x2 = area->x2 >= ST7735S_HOR_RES ? ST7735S_HOR_RES - 1 : area->x2;
int32_t act_y2 = area->y2 >= ST7735S_VER_RES ? ST7735S_VER_RES - 1 : area->y2;
int32_t act_x2 = area->x2 >= hor_res ? hor_res - 1 : area->x2;
int32_t act_y2 = area->y2 >= ver_res ? ver_res - 1 : area->y2;

/* Column address */
cmd[0] = ST7735S_CASET;
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12 changes: 10 additions & 2 deletions hw/drivers/display/lvgl/tft/st7789/src/st7789.c
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Original file line number Diff line number Diff line change
Expand Up @@ -209,12 +209,20 @@ void
st7789_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p)
{
uint8_t cmd[5];
lv_disp_t *disp = lv_disp_get_default();
lv_coord_t hor_res = lv_disp_get_hor_res(disp);
lv_coord_t ver_res = lv_disp_get_ver_res(disp);

if (area->x2 < 0 || area->y2 < 0 || area->x1 >= hor_res || area->y1 >= ver_res) {
lv_disp_flush_ready(drv);
return;
}

/* Truncate the area to the screen */
int32_t offsetx1 = area->x1 < 0 ? 0 : area->x1;
int32_t offsety1 = area->y1 < 0 ? 0 : area->y1;
int32_t offsetx2 = area->x2 >= ST7789_HOR_RES ? ST7789_HOR_RES - 1 : area->x2;
int32_t offsety2 = area->y2 >= ST7789_VER_RES ? ST7789_VER_RES - 1 : area->y2;
int32_t offsetx2 = area->x2 >= hor_res ? hor_res - 1 : area->x2;
int32_t offsety2 = area->y2 >= ver_res ? ver_res - 1 : area->y2;

#if (CONFIG_LV_TFT_DISPLAY_OFFSETS)
offsetx1 += CONFIG_LV_TFT_DISPLAY_X_OFFSET;
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23 changes: 23 additions & 0 deletions hw/drivers/display/lvgl/tft/st7796S/pkg.yml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#

pkg.name: hw/drivers/display/lvgl/tft/st7796S
pkg.description: LVGL display driver for ST7796S
pkg.author: "Apache Mynewt <[email protected]>"
pkg.homepage: "http://mynewt.apache.org/"
pkg.keywords:
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