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Pull in display code and test.

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This commit is contained in:
Shaun Reed 2025-11-01 16:58:50 -04:00
parent 83473c4899
commit 577428fef9
14 changed files with 1553 additions and 10 deletions
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4
esp/cpp/08_dht11-lcd/main/CMakeLists.txt
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@ -1,6 +1,6 @@
idf_component_register(
SRCS
main.cpp
main.h
main.cpp display.cpp panel_device.cpp scoped_lock.cpp
main.h display.h panel.h panel_device.h scoped_lock.h time_keeper.h ssd1306.h
INCLUDE_DIRS .
)

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esp/cpp/08_dht11-lcd/main/display.cpp Normal file
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/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#include <lv_init.h>
#include "display.h"
// Static TimeKeeper for managing ESP timers across all displays.
TimeKeeper Display::timers_;
Display::Display(IPanelDevice &device) :
panel_(device)
{
if (!lv_is_initialized()) {
ESP_LOGI(TAG, "Initialize LVGL");
lv_init();
}
ESP_LOGI(TAG, "Creating LVGL display");
lv_display_ = panel_.device_->create_display();
// associate the i2c panel handle to the display
lv_display_set_user_data(lv_display_, panel_.esp_panel_);
panel_.register_display_callbacks(lv_display_);
}
void Display::set_text(const char *text,
const char *name,
lv_label_long_mode_t long_mode,
lv_align_t align)
{
// Lock the mutex due to the LVGL APIs are not thread-safe.
ScopedLock lock;
ESP_LOGI(TAG, "Display LVGL Scroll Text");
lv_obj_t *scr = lv_display_get_screen_active(lv_display_);
// Create the label if it's `name` doesn't already exist in the map keys.
if (!lv_objects_.count(name)) {
lv_objects_[name] = lv_label_create(scr);
}
auto obj = lv_objects_[name];
// Set text and long mode.
lv_label_set_long_mode(obj, long_mode);
lv_label_set_text(obj, text);
// Set the size of the screen.
// If you use rotation 90 or 270 use lv_display_get_vertical_resolution.
lv_obj_set_width(obj, lv_display_get_horizontal_resolution(lv_display_));
lv_obj_align(obj, align, 0, 0);
}

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esp/cpp/08_dht11-lcd/main/display.h Normal file
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/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#ifndef DISPLAY_H
#define DISPLAY_H
#include <widgets/label/lv_label.h>
#include <unordered_map>
#include "time_keeper.h"
#include "panel.h"
#include "scoped_lock.h"
/**
* Encapsulates lv_display handle and related LVGL operations.
* Contains helper methods that wrap basic LVGL operations such as drawing text.
* The underlying lv_display can be obtained for manual LVGL operations.
* @sa ScopedLock
* @sa Display::get()
*/
class Display {
public:
/**
* Construct a new Display using an object that implements IPanelDevice.
*
* @param device An object that implements the IPanelDevice interface.
*/
explicit Display(IPanelDevice &device);
~Display() = default;
Display(const Display &) = delete;
Display(Display &) = delete;
Display &operator=(Display &) = delete;
using lv_display_handle_t = lv_display_t *;
//
// GETTERS
/**
* Getter for accessing LVGL display handle.
*
* @sa ScopedLock for calling custom LVGL API's not implemented by Display.
*/
[[nodiscard]] inline lv_display_handle_t get() const { return lv_display_; }
/**
* Getter for accessing LVGL display handle.
*
* @sa ScopedLock for calling custom LVGL API's not implemented by Display.
*/
[[nodiscard]] inline lv_display_handle_t get() { return lv_display_; }
/// Dereference operator for accessing LVGL display handle.
[[nodiscard]] inline lv_display_handle_t operator*() const { return get(); }
/// Dereference operator for accessing LVGL display handle.
[[nodiscard]] inline lv_display_handle_t operator*() { return get(); }
//
// LVGL OPERATIONS
/**
* Create a LVGL label with some given text on the current display.
* The name of the object can be reused to change text on this label later.
*
* @param text Text to write to the display.
* @param name Name for the LVGL label object associated with this text.
* @param long_mode LVGL long mode for text wider than the current display.
* @param align LVGL alignment to use for placing the label on the display.
*/
void set_text(const char *text,
const char *name,
lv_label_long_mode_t long_mode = LV_LABEL_LONG_SCROLL_CIRCULAR,
lv_align_t align = LV_ALIGN_TOP_MID);
//
// PUBLIC STATIC MEMBERS
/// Public static TimeKeeper for managing ESP timers across all displays.
static TimeKeeper timers_;
private:
//
// PRIVATE MEMBERS
/// Panel associated with this Display.
Panel panel_;
/// LVGL display handle.
lv_display_handle_t lv_display_;
/**
* LVGL object handles stored in the LVGL screen associated with this Display.
*
* @sa Display::set_text
* @sa lv_display_get_screen_active
*/
std::unordered_map<const char *, lv_obj_t *> lv_objects_;
/// Tag used for ESP logging.
constexpr static const char *TAG = "Display";
};
#endif // DISPLAY_H

2
esp/cpp/08_dht11-lcd/main/idf_component.yml
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@ -1,5 +1,7 @@
## IDF Component Manager Manifest File
dependencies:
idf: '>=5.3.0'
lvgl/lvgl: "9.2.0"
esp_lcd_sh1107: "^1"
i2c:
path: ../../components/i2c

23
esp/cpp/08_dht11-lcd/main/main.cpp
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@ -7,6 +7,8 @@
*/
#include "i2c.h"
#include "display.h"
#include "ssd1306.h"
// Pin may vary based on your schematic.
#define PIN_SDA GPIO_NUM_21
@ -15,6 +17,25 @@
extern "C" void app_main(void)
{
init_i2c(PIN_SDA, PIN_SCL);
I2C_init(PIN_SDA, PIN_SCL);
auto i2c = I2C_get();
SSD1306 ssd1306(i2c);
Display d(ssd1306);
d.set_text("Test test 12345678910",
"test-text1",
LV_LABEL_LONG_SCROLL,
LV_ALIGN_CENTER);
d.set_text("Test test changing text",
"test-text1",
LV_LABEL_LONG_SCROLL,
LV_ALIGN_CENTER);
d.set_text("Hello hello hello hello hello hello hello hello!", "test-text2");
d.set_text("A random sentence with no meaning at all.",
"test-text3",
LV_LABEL_LONG_CLIP,
LV_ALIGN_BOTTOM_MID);
}

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esp/cpp/08_dht11-lcd/main/panel.h Normal file
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/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#ifndef PANEL_H
#define PANEL_H
#include "panel_device.h"
/**
* Encapsulates esp_lcd_panel handles and operations.
* The only exception is esp_lcd_panel_io_i2c_config_t owned by IPanelDevice.
* This structure requires details specific to the implementing device.
*
* Panel is an implementation detail of Display, not meant to be used directly.
*/
struct Panel {
/**
* Construct a new Panel using an object that implements IPanelDevice.
*
* @param device An object that implements the IPanelDevice interface.
*/
explicit Panel(IPanelDevice &device) :
device_(&device),
esp_io_(nullptr),
esp_panel_(nullptr),
esp_panel_config_(
(esp_lcd_panel_dev_config_t) {
.reset_gpio_num = static_cast<gpio_num_t>(device_->rst_num_),
.bits_per_pixel = 1,
.vendor_config = device_->vendor_config(),
}
)
{
esp_io_ = device_->create_io_handle();
device_->create_panel(esp_panel_config_, esp_io_, esp_panel_);
ESP_LOGI(TAG, "Resetting panel display");
ESP_ERROR_CHECK(esp_lcd_panel_reset(esp_panel_));
ESP_LOGI(TAG, "Initializing panel display");
ESP_ERROR_CHECK(esp_lcd_panel_init(esp_panel_));
ESP_LOGI(TAG, "Turning on panel display");
ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(esp_panel_, true));
}
~Panel() = default;
//
// PUBLIC MEMBERS
/// Pointer to object using known interface for IPanelDevice.
IPanelDevice *device_;
/// ESP LCD panel IO handle.
esp_lcd_panel_io_handle_t esp_io_;
/// ESP LCD panel handle.
esp_lcd_panel_handle_t esp_panel_;
/// ESP LCD panel configuration structure.
esp_lcd_panel_dev_config_t esp_panel_config_;
/**
* Registers LVGL draw buffers and callbacks for rendering the display.
*
* @param display_handle Pointer to the LVGL display to use for rendering.
*/
inline void register_display_callbacks(lv_display_t *display_handle) const
{
device_->register_rendering_data(display_handle, esp_io_);
device_->register_lvgl_tick_timer();
}
private:
//
// PRIVATE MEMBERS
/// Tag used for ESP logging.
constexpr static const char *TAG = "Panel";
};
#endif //PANEL_H

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esp/cpp/08_dht11-lcd/main/panel_device.cpp Normal file
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/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#include "panel_device.h"
#include "display.h"
bool IPanelDevice::lvgl_flush_ready_cb(esp_lcd_panel_io_handle_t,
esp_lcd_panel_io_event_data_t *,
void *user_ctx)
{
auto *disp = (lv_display_t *) user_ctx;
lv_display_flush_ready(disp);
return false;
}
void IPanelDevice::lvgl_flush_cb(lv_display_t *display, const lv_area_t *area,
uint8_t *px_map) // NOLINT(*-non-const-parameter)
{
auto panel_handle =
(esp_lcd_panel_handle_t) lv_display_get_user_data(display);
// Necessary because LVGL reserves 2x4 bytes in the buffer for a palette.
// Since we are monochrome, we don't need these additional bytes.
// For more information about the monochrome, please refer to:
// https://docs.lvgl.io/9.2/porting/display.html#monochrome-displays
// Skip the palette here.
px_map += LVGL_PALETTE_SIZE;
uint16_t hor_res = lv_display_get_physical_horizontal_resolution(display);
int32_t x1 = area->x1;
int32_t x2 = area->x2;
int32_t y1 = area->y1;
int32_t y2 = area->y2;
// As of 03/01/2025 master branch of LVGL contains this helper for the same.
// https://docs.lvgl.io/master/API/draw/sw/lv_draw_sw_utils.html
// lv_draw_sw_i1_convert_to_vtiled()
for (int32_t y = y1; y <= y2; y++) {
for (int32_t x = x1; x <= x2; x++) {
// Get the byte offset of the pixel coordinates using horizontal-mapping.
int h_offset = Pixel::horizontal_byte_offset(x, y, hor_res);
// True if the pixel is lit, else false.
bool chroma_color = px_map[h_offset] & Pixel::msb_mask(x);
// We need an additional buffer for transposing the pixel data to the
// vertical format required by the display driver.
uint8_t *buf = IPanelDevice::get_additional_draw_buffer();
// Move to the position in the auxillary buffer where the pixel is stored.
buf += Pixel::vertical_byte_offset(x, y, hor_res);
// Write the single bit to the monochrome display mapped vertically.
// Take the Least Significant Bit mask of the Y coordinate to select the
// bit representing a pixel at position y in a vertically-mapped display.
if (chroma_color) {
// Set the vertically-mapped pixel to on.
*buf &= ~Pixel::lsb_mask(y);
} else {
// Set the vertically-mapped pixel to off.
*buf |= Pixel::lsb_mask(y);
}
}
}
// Pass the draw buffer to the driver.
ESP_ERROR_CHECK(
esp_lcd_panel_draw_bitmap(panel_handle, x1, y1, x2 + 1, y2 + 1,
IPanelDevice::get_additional_draw_buffer()));
}
void IPanelDevice::lvgl_increase_tick_cb(void *)
{
// Tell LVGL how many milliseconds has elapsed
lv_tick_inc(LVGL_TICK_PERIOD_MS);
}
[[noreturn]] void IPanelDevice::lvgl_port_task(void *)
{
// Optionally initialize some LVGL objects here before entering loop below.
ESP_LOGI(TAG, "Starting LVGL task");
for (uint32_t time_to_next_ms = 0; true; usleep(1000 * time_to_next_ms)) {
// Obtain LVGL API lock before calling any LVGL methods.
ScopedLock lock;
// Optionally handle LVGL input or event logic here.
// Update LVGL periodic timers.
time_to_next_ms = lv_timer_handler();
}
}
void IPanelDevice::register_rendering_data(lv_display_t *display_handle,
esp_lcd_panel_io_handle_t io_handle)
{
// Create draw buffer.
ESP_LOGI(TAG, "Allocate separate LVGL draw buffers");
lv_buf_ = heap_caps_calloc(1, lv_buf_size_,
MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
assert(lv_buf_);
ESP_LOGI(TAG, "Set LVGL draw buffers");
// Color format must be set first, LVGL9 support new monochromatic format.
lv_display_set_color_format(display_handle, LV_COLOR_FORMAT_I1);
lv_display_set_buffers(display_handle, lv_buf_, nullptr,
lv_buf_size_,
LV_DISPLAY_RENDER_MODE_FULL);
lv_display_set_rotation(display_handle, LV_DISPLAY_ROTATION_0);
ESP_LOGI(TAG, "Set LVGL callback for flushing to the display");
lv_display_set_flush_cb(display_handle, IPanelDevice::lvgl_flush_cb);
ESP_LOGI(TAG, "Register io panel callback for LVGL flush ready notification");
const esp_lcd_panel_io_callbacks_t cbs = {
.on_color_trans_done = IPanelDevice::lvgl_flush_ready_cb,
};
ESP_ERROR_CHECK(
esp_lcd_panel_io_register_event_callbacks(io_handle, &cbs,
display_handle));
}
void IPanelDevice::register_lvgl_tick_timer()
{
ESP_LOGI(TAG, "Use esp_timer to increase LVGL tick");
const esp_timer_create_args_t esp_timer_args = {
.callback = &IPanelDevice::lvgl_increase_tick_cb,
// Data to pass to the IPanelDevice::lvgl_port_task callback.
.arg = nullptr,
.name = "lvgl_tick",
};
Display::timers_.start_new_timer_periodic(esp_timer_args,
LVGL_TICK_PERIOD_MS * 1000);
// LVGL requires a FreeRTOS task for running it's event loop.
// The lvgl_port_task callback can update the UI or handle input logic.
// For this basic example we don't do either of these things.
ESP_LOGI(TAG, "Create LVGL FreeRTOS task");
// Optionally set user data to pass to LVGL's FreeRTOS task callback here.
void *user_data = nullptr;
xTaskCreate(lvgl_port_task, "LVGL", LVGL_TASK_STACK_SIZE,
user_data, LVGL_TASK_PRIORITY, nullptr);
}

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esp/cpp/08_dht11-lcd/main/panel_device.h Normal file
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/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#ifndef PANEL_DEVICE_H
#define PANEL_DEVICE_H
#include <esp_lcd_panel_dev.h>
#include <esp_lcd_panel_ops.h>
#include <esp_lcd_panel_io.h>
#include <esp_log.h>
#include <display/lv_display.h>
#include "i2c.h"
// LVGL reserves 2x4 bytes in the buffer to be used as a palette.
// This additional space must be added to the IPanelDevice::buf_size_.
#define LVGL_PALETTE_SIZE 8
#define LVGL_TICK_PERIOD_MS 5
#define LVGL_TASK_STACK_SIZE (4 * 1024)
#define LVGL_TASK_PRIORITY 2
#define LCD_H_RES 128
#define LCD_V_RES 64
/**
* Wraps some foundational operations performed on pixel coordinates when
* dealing with pointer arithmetic. Most of these could be done ad-hoc as needed
* but using this helper reduces the risk of errors.
*/
struct Pixel {
/**
* Calculate byte offset for the pixel at [x,y] within a horizontally-mapped
* monochrome uint8 draw buffer, using the initialized horizontal resolution.
*
* We use `>> 3` because each pixel requires 1 bit, but each uint8 in the draw
* buffer can hold 8 bits. To find the uint8 value in our draw buffer that
* stores this pixel's value we must compensate for this when using pixel
* coordinates in byte math.
*
* Therefore, each uint8 in the draw buffer stores the state of 8 pixels.
* Below is an example of calculating for [x, y] pixel coordinates [20, 10].
* The example uses a horizontal resolution of 128.
*
* For the horizontal case, each row (y) of the image is represented by
* `hor_res >> 3` bytes (16). The byte-offset of the first pixel in the 10th
* row for example is `16 * 10` = 160.
*
* Since the pixels are stored horizontally we must calculate the 20th pixel
* column (x) as `160 + (20 >> 3)`, or `160 + (20 / 8)` to get a final offset
* of 162.
*
* @param x X pixel coordinate to find byte offset.
* @param y Y pixel coordinate to find byte offset.
* @param hor_res horizontal resolution of the display.
* @return byte offset for a single-byte monochrome pixel at [x,y].
*/
[[maybe_unused]] [[nodiscard]] static ptrdiff_t
horizontal_byte_offset(const int32_t &x, const int32_t &y,
const int32_t &hor_res = LCD_V_RES)
{
// Convert pixel (bit) coordinates to byte coordinates in the draw buffer.
return (hor_res >> 3) * y + (x >> 3);
}
/**
* Calculate byte offset for the pixel at [x,y] within a vertically-mapped
* monochrome uint8 draw buffer, using the initialized horizontal resolution.
*
* We use `>> 3` because each pixel requires 1 bit, but each uint8 in the draw
* buffer can hold 8 bits. To find the uint8 value in our draw buffer that
* stores this pixel's value we must compensate for this when using pixel
* coordinates in byte math.
*
* Therefore, each uint8 in the draw buffer stores the state of 8 pixels.
* Below is an example of calculating for [x, y] pixel coordinates [20, 10].
* The example uses a horizontal resolution of 128.
*
* For the vertical case, each row (y) of the image is represented by
* `hor_res` bytes (128) - one for each column (x). Because the pixels are
* stored vertically, the byte-offset of the first pixel in the 10th row is
* `128 * (10 >> 3)` or * `128 * (10 / 8)` = 128.
*
* From this location we can simply calculate the 20th pixel column (x) as
* `128 + 20` to get a final offset of 148, because the pixels are stored in a
* columnar format.
*
* @param x X pixel coordinate to find byte offset.
* @param y Y pixel coordinate to find byte offset.
* @param hor_res horizontal resolution of the display.
* @return byte offset for a single-byte monochrome pixel at [x,y].
*/
[[maybe_unused]] [[nodiscard]] static ptrdiff_t
vertical_byte_offset(const int32_t &x, const int32_t &y,
const int32_t &hor_res = LCD_V_RES)
{
// Convert pixel (bit) coordinates to byte coordinates in the draw buffer.
return hor_res * (y >> 3) + x;
}
/**
* Finds the Most Significant Bit location of bit `i` in a byte.
*
* MSB LSB
* bits 7 6 5 4 3 2 1 0
* data 8 7 6 5 4 3 2 1
* Left Right
*
* @return bitmask for MSB location of `i`.
*/
[[maybe_unused]] [[nodiscard]] static uint8_t
msb_mask(const int32_t &i) { return 1 << (7 - i % 8); }
/**
* Finds the Least Significant Bit location of bit `i` in a byte.
*
* LSB MSB
* bits 0 1 2 3 4 5 6 7
* data 1 2 3 4 5 6 7 8
* Left Right
*
* @return bitmask for LSB location of `i`.
*/
[[maybe_unused]] [[nodiscard]] static uint8_t
lsb_mask(const int32_t &i) { return 1 << (i % 8); }
};
/**
* Encapsulates vendor specific ESP LCD panel initialization logic.
* This pure virtual interface can be inherited from for using new LCD devices.
* See SSD1306 as an example to implement IPanelDevice for NT35510 or ST7789.
*
* At this time only I2C is supported.
* Classes that inherit from this interface should likely be marked final.
*/
class IPanelDevice {
public:
/**
* Construct an IPanelDevice.
*
* @param i2c I2C object. Eventually this will mature to IProtocol or similar.
* @param config I2C configuration for this device.
* @param height Height of the device screen in pixels.
* @param width Width of the device screen in pixels.
*/
explicit IPanelDevice(i2c_master_bus_handle_t &i2c,
esp_lcd_panel_io_i2c_config_t config,
int width,
int height) :
IPanelDevice(i2c, config, width, height,
width * height / 8 + LVGL_PALETTE_SIZE) { }
/**
* Construct an IPanelDevice.
*
* @param i2c I2C object. Eventually this will mature to IProtocol or similar.
* @param config I2C configuration for this device.
* @param height Height of the device screen in pixels.
* @param width Width of the device screen in pixels.
* @param draw_buf_size Size of the draw buffer for this device.
*/
explicit IPanelDevice(i2c_master_bus_handle_t &,
esp_lcd_panel_io_i2c_config_t io_config,
int width,
int height,
size_t draw_buf_size) :
width_(width),
height_(height),
rst_num_(-1),
lv_buf_size_(draw_buf_size),
esp_io_config_(io_config),
lv_buf_(nullptr) { }
virtual ~IPanelDevice() = default;
//
// PUBLIC METHODS
/**
* Create an LVGL display using the width and height of this device.
*
* @return Handle to the created LVGL display.
*/
[[nodiscard]] lv_display_t *create_display() const
{
auto display = lv_display_create(width_, height_);
assert(display);
return display;
}
/**
* Create an ESP LCD panel IO handle.
*
* @return The created ESP LCD panel IO handle.
*/
[[nodiscard]] esp_lcd_panel_io_handle_t create_io_handle()
{
ESP_LOGI(TAG, "Creating panel IO handle");
esp_lcd_panel_io_handle_t handle = nullptr;
ESP_ERROR_CHECK(
esp_lcd_new_panel_io_i2c(I2C_get(), &esp_io_config_, &handle));
return handle;
}
/**
* Create and initialize an ESP panel handle.
* IPanelDevice implementors must initialize the panel within init_panel.
*
* @param config ESP LCD panel configuration.
* @param io ESP LCD panel IO handle.
* @param [out] panel ESP LCD panel handle output pointer location.
*/
void create_panel(esp_lcd_panel_dev_config_t &config,
esp_lcd_panel_io_handle_t io,
esp_lcd_panel_handle_t &panel)
{
// If the passed handle is already allocated, delete it.
if (panel != nullptr) {
ESP_LOGI(TAG, "Removing unused panel");
esp_lcd_panel_del(panel);
}
ESP_LOGI(TAG, "Installing vendor panel driver");
// Call pure virtual method responsible for initializing the panel handle.
init_panel(config, io, panel);
}
/**
* Retrieve the device specific vendor configuration structure.
*
* @return Address of vendor configuration structure.
* @sa SSD1306::vendor_config
*/
virtual void *vendor_config() = 0;
/**
* Registers LVGL draw buffers and callbacks for this display.
*
* An implementation of the interface can optionally override this method to
* provide custom LVGL callbacks and display configurations.
*
* @param display_handle LVGL display handle to use for rendering.
* @param io_handle IO handle for the ESP LCD panel.
*/
virtual void register_rendering_data(lv_display_t *display_handle,
esp_lcd_panel_io_handle_t io_handle);
/**
* Registers LVGL ticker timer callback for rendering this display.
*
* An implementation of the interface can optionally override this method to
* provide custom LVGL callbacks and tick configurations.
*/
virtual void register_lvgl_tick_timer();
//
// PUBLIC MEMBERS
/// Width of the device screen in pixels.
int32_t width_;
/// Height of the device screen in pixels.
int32_t height_;
/// RST GPIO pin number.
int rst_num_;
/// LVGL draw buffer size for the device.
size_t lv_buf_size_;
/// ESP LCD panel IO configuration.
esp_lcd_panel_io_i2c_config_t esp_io_config_;
protected:
/**
* Static accessor to a static buffer to store draw buffer data for the panel.
*
* This method is protected to allow an implementation to provide a custom
* callback method similar to IPanelDevice::lvgl_flush_cb.
*
* The buffer is allocated statically within the scope of this function to
* allow creating multiple panels that _each_ manage their own statically
* allocated draw buffer data. This simplifies implementing the interface by
* taking this responsibility off of the implementor. The buffer will only be
* allocated if this method is called, so the memory is only used if required.
*
* @return Pointer to uint8 draw buffer data.
* @sa register_rendering_data for overriding LVGL rendering callbacks.
*/
static uint8_t *get_additional_draw_buffer()
{
// Static to the scope of this function, not the compilation unit.
// For LV_COLOR_FORMAT_I1 we need an extra buffer to hold converted data.
static uint8_t oled_buffer[LCD_H_RES * LCD_V_RES / 8];
return oled_buffer;
}
private:
//
// PRIVATE METHODS
/**
* Initializes the ESP panel using vendor specific APIs and configurations.
* This method should implement any setup logic specific to the device.
*
* @param config ESP LCD panel configuration.
* @param io ESP LCD panel IO handle.
* @param [out] panel ESP LCD panel handle output pointer location.
*/
virtual void init_panel(esp_lcd_panel_dev_config_t &config,
esp_lcd_panel_io_handle_t io,
esp_lcd_panel_handle_t &panel) = 0;
//
// PRIVATE STATIC METHODS
/**
* The callback invoked when panel IO finishes transferring color data.
* This signals that the panel is ready to flush image data to the display.
*
* @param panel LCD panel IO handles.
* @param data Panel IO event data, fed by driver.
* @param user_ctx User data, passed from `esp_lcd_panel_io_xxx_config_t`.
* @return Whether a high priority task has been waken up by this function.
* @sa SSD1306::SSD1306 for setting user_ctx data passed to the callback.
* @sa register_rendering_data for overriding this callback.
*/
static bool lvgl_flush_ready_cb(esp_lcd_panel_io_handle_t panel,
esp_lcd_panel_io_event_data_t *data,
void *user_ctx);
/**
* The callback invoked for flushing the rendered image to the display.
*
* `px_map` contains the rendered image as raw pixel map and it should be
* copied to `area` on the display.
*
* The following details are crucial for understanding the logic surrounding
* flushing to the display in this example.
*
* The order of bits within the px_map from _LVGL_ is MSB first.
* MSB LSB
* bits 7 6 5 4 3 2 1 0
* pixels 0 1 2 3 4 5 6 7
* Left Right
*
* The bytes from _LVGL_ are mapped to pixel rows of the display
* 8 bits (pixels) per byte -
* [0, 0, 0, 0, 0, 0, 0, 0]
* [0, 0, 0, 0, 0, 0, 0, 0]
* [0, 0, 0, 0, 0, 0, 0, 0]
*
* The order of bits expected by the _display driver_ is LSB first.
* We must preserve pairing of each bit and pixel when writing to the display.
* LSB MSB
* bits 0 1 2 3 4 5 6 7
* pixels 7 6 5 4 3 2 1 0
* Left Right
*
* Bytes expected by the _display driver_ map to pixel columns of the display.
* 8 bits (pixels) per byte -
* [0, [0, [0, [0,
* 0, 0, 0, 0,
* 0, 0, 0, 0,
* 0, 0, 0, 0,
* 0, 0, 0, 0,
* 0, 0, 0, 0,
* 0, 0, 0, 0,
* 0] 0] 0] 0]
*
* These layouts in memory have no opinion on the shape of the image. The
* beginning and end of a row or a column for example is entirely dependent
* on how the data is accessed. The vertical and horitzontal resolution may
* vary between displays.
*
* For the LV_COLOR_FORMAT_I1 color format we are using, an additional buffer
* is needed for transposing the bits to the vertical arrangement required by
* the display driver that is outlined above.
*
* This callback implementation is an example of handling this transposition
* and flushing the data to the display in the expected format.
*
* @param display LVGL display handle to use for rendering.
* @param area Area of the display being flushed.
* @param px_map Rendered image data for writing to the display area.
* @sa register_rendering_data for overriding this callback.
* @sa get_additional_draw_buffer
*/
static void lvgl_flush_cb(lv_display_t *display,
const lv_area_t *area,
uint8_t *px_map);
/**
* Callback invoked for every period of the timer.
*
* This callback _must_ call lv_tick_inc to inform LVGL how much time has
* elapsed since the last period of the timer.
*
* @param data User data passed to the callback.
* @sa register_lvgl_tick_timer for setting user data and the tick period of
* the timer, or overriding this callback entirely.
*/
static void lvgl_increase_tick_cb(void *data);
/**
* FreeRTOS task callback invoked for handling LVGL events or updating the UI.
*
* This function is intentionally an endless loop and should never return.
* LVGL initialization logic can optionally be added before entering the loop.
* Input logic can optionally be handled within the loop.
*
* This callback _must_ call lv_timer_handler to handle LVGL periodic timers.
*
* @param data User data passed to the callback.
* @sa register_lvgl_tick_timer for overriding this callback.
*/
[[noreturn]] static void lvgl_port_task(void *data);
//
// PRIVATE MEMBERS
/// LVGL draw buffer associated with this Display's lv_display_t.
void *lv_buf_;
/// Tag used for ESP logging.
constexpr static const char *TAG = "IPanelDevice";
};
#endif // PANEL_DEVICE_H

12
esp/cpp/08_dht11-lcd/main/scoped_lock.cpp Normal file
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@ -0,0 +1,12 @@
/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#include "scoped_lock.h"
// LVGL library is not thread-safe, this example calls LVGL APIs from tasks.
// We must use a mutex to protect it.
_lock_t ScopedLock::lv_lock_;

28
esp/cpp/08_dht11-lcd/main/scoped_lock.h Normal file
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@ -0,0 +1,28 @@
/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#ifndef SCOPED_LOCK_H
#define SCOPED_LOCK_H
#include <mutex>
/**
* Obtains LVGL API mutex lock for the duration of local scope.
*
* LVGL library is not thread-safe, this lock should be held when making calls
* to the LVGL API, and released as soon as possible when finished.
*/
struct ScopedLock {
explicit ScopedLock() { _lock_acquire(&lv_lock_); }
~ScopedLock() { _lock_release(&lv_lock_); }
/// Mutex used to protect LVGL API calls.
static _lock_t lv_lock_;
};
#endif // SCOPED_LOCK_H

106
esp/cpp/08_dht11-lcd/main/ssd1306.h Normal file
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@ -0,0 +1,106 @@
/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#ifndef SSD1306_H
#define SSD1306_H
#include <esp_lcd_panel_ssd1306.h>
#include "panel_device.h"
// According to specific display hardware.
// https://www.digikey.com/en/products/detail/winstar-display/WEA012864DWPP3N00003/20533255
#define SCREEN_WIDTH 128 // OLED display width, in pixels.
#define SCREEN_HEIGHT 64 // OLED display height, in pixels.
// According to SSD1306 datasheet.
// https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
#define I2C_HW_ADDR 0x3C
#define LCD_PIXEL_CLOCK_HZ (400 * 1000)
// Bit number used to represent command and parameter
#define LCD_CMD_BITS 8
#define LCD_PARAM_BITS 8
/**
* Example of implementing the IPanelDevice interface for SSD1306 LCD device.
*/
class SSD1306 final : public IPanelDevice {
public:
/**
* Construct a new SSD1306 device.
*
* @param i2c I2C master bus to manage this device.
*/
explicit SSD1306(i2c_master_bus_handle_t &i2c) :
SSD1306(i2c, {.height = SCREEN_HEIGHT}) { }
/**
* Construct a new SSD1306 device given a specific SSD1306 configuration.
*
* @param i2c I2C master bus to manage this device.
* @param config SSD1306 vendor configuration.
* @param width Width of the device screen in pixels.
* @param height Height of the device screen in pixels.
*/
SSD1306(i2c_master_bus_handle_t &i2c,
esp_lcd_panel_ssd1306_config_t config,
int width = SCREEN_WIDTH,
int height = SCREEN_HEIGHT
) :
IPanelDevice(i2c,
(esp_lcd_panel_io_i2c_config_t) {
.dev_addr = I2C_HW_ADDR,
// User data to pass to the LVGL flush_ready callback.
// See IPanelDevice::lvgl_flush_ready_cb
.user_ctx = nullptr,
.control_phase_bytes = 1,
.dc_bit_offset = 6,
.lcd_cmd_bits = LCD_CMD_BITS,
.lcd_param_bits = LCD_PARAM_BITS,
.scl_speed_hz = LCD_PIXEL_CLOCK_HZ,
},
width,
height
),
ssd1306_config_(config) { }
~SSD1306() final = default;
//
// PUBLIC METHODS
/**
* Provides the SSD1306 vendor configuration to IPanelDevice consumers.
*
* @return Address of the SSD1306 vendor configuration structure.
*/
void *vendor_config() override
{
return &ssd1306_config_;
}
//
// PUBLIC MEMBERS
/// SSD1306 configuration structure.
esp_lcd_panel_ssd1306_config_t ssd1306_config_;
private:
//
// PRIVATE METHODS
/// Initializes the ESP LCD panel handle for the SSD1306 device.
void init_panel(esp_lcd_panel_dev_config_t &config,
esp_lcd_panel_io_handle_t io,
esp_lcd_panel_handle_t &panel) override
{
ESP_ERROR_CHECK(esp_lcd_new_panel_ssd1306(io, &config, &panel));
}
};
#endif // SSD1306_H

161
esp/cpp/08_dht11-lcd/main/time_keeper.h Normal file
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@ -0,0 +1,161 @@
/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
##############################################################################
*/
#ifndef TIME_KEEPER_H
#define TIME_KEEPER_H
#include <esp_log.h>
#include <esp_timer.h>
#include "i2c.h"
/**
* Stores arguments and ESP timer handle for a Timer.
* In general Timers should be used via the TimeKeeper interface only.
*
* Timers cannot be copied, and are only created by a TimeKeeper instance.
* The TimeKeeper can delete existing Timers, calling it's destructor.
* The ESP timer will be deleted when this class desctructor is called.
*/
struct Timer {
explicit Timer(esp_timer_create_args_t args) :
args_(args), esp_timer_(nullptr)
{
ESP_LOGI(TAG, "Creating esp_timer with name: '%s'", args_.name);
ESP_ERROR_CHECK(esp_timer_create(&args, &esp_timer_));
}
~Timer()
{
ESP_LOGI(TAG, "Destroying esp_timer with name: '%s'", args_.name);
ESP_ERROR_CHECK(esp_timer_delete(esp_timer_));
}
Timer(const Timer &) = delete;
Timer(Timer &) = delete;
Timer &operator=(Timer &) = delete;
//
// PUBLIC MEMBERS
/// Arguments passed to ESP API during timer creation.
esp_timer_create_args_t args_;
/// ESP timer handle.
esp_timer_handle_t esp_timer_;
private:
//
// PRIVATE MEMBERS
/// Tag used for ESP logging.
constexpr static const char *TAG = "Timer";
};
/**
* ESP timer mananger class.
*
* Timers should only be accessed using the get_handle method.
* If the Timer destructor is called the underlying ESP timer will be deleted.
*/
struct TimeKeeper {
/// Timer handle type used for referring to Timers.
using TimerHandle = Timer *;
//
// GETTERS
TimerHandle get_handle(const char *name)
{
return &managed_timers_.at(name);
}
TimerHandle operator[](const char *name) { return get_handle(name); }
//
// PUBLIC METHODS
/**
* Create a new managed Timer with the provided ESP arguments.
* The timer can be retrieved later using the args.name field value.
*
* @param args ESP timer creation arguments.
* @return TimerHandle Handle to a Timer managed by this TimeKeeper.
* @sa get_handle
* @sa operator[](const char*)
*/
[[maybe_unused]] TimerHandle create_timer(esp_timer_create_args_t args)
{
auto rt = managed_timers_.emplace(args.name, args);
if (!rt.second) {
ESP_LOGE(TAG, "Timer already exists with name '%s'", args.name);
return nullptr;
}
return &rt.first->second;
}
/// Stop a Timer with the given name.
[[maybe_unused]] void stop_timer(const char *name)
{
ESP_ERROR_CHECK(esp_timer_stop(get_handle(name)->esp_timer_));
}
/// Delete a Timer with the given name.
[[maybe_unused]] void delete_timer(const char *name)
{
if (managed_timers_.erase(name) == 0) {
ESP_LOGE(TAG, "Attempt to delete timer that does not exist: '%s'", name);
}
}
/// Create a Timer with the ESP args and call esp_timer_start_periodic.
[[maybe_unused]] void
start_new_timer_periodic(esp_timer_create_args_t args,
uint64_t period)
{
start_timer_periodic(create_timer(args)->args_.name, period);
}
/// Calls esp_timer_start_periodic on the Timer with the given name.
[[maybe_unused]] void start_timer_periodic(const char *name,
uint64_t period)
{
ESP_ERROR_CHECK(
esp_timer_start_periodic(get_handle(name)->esp_timer_, period));
}
/// Create a Timer with the ESP args and call esp_timer_start_once.
[[maybe_unused]] void start_new_timer_once(esp_timer_create_args_t args,
uint64_t timeout_us)
{
start_timer_once(create_timer(args)->args_.name, timeout_us);
}
/// Calls esp_timer_start_once on the Timer with the given name.
[[maybe_unused]] void start_timer_once(const char *name,
uint64_t timeout_us)
{
ESP_ERROR_CHECK(
esp_timer_start_once(get_handle(name)->esp_timer_, timeout_us));
}
private:
//
// PRIVATE MEMBERS
/// Existing ESP timers created for this TimeKeeper instance.
std::unordered_map<const char *, Timer> managed_timers_;
/// Tag used for ESP logging.
constexpr static const char *TAG = "TimeKeeper";
};
#endif // TIME_KEEPER_H

377
esp/cpp/08_dht11-lcd/sdkconfig
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@ -2010,6 +2010,383 @@ CONFIG_WIFI_PROV_AUTOSTOP_TIMEOUT=30
CONFIG_WIFI_PROV_STA_ALL_CHANNEL_SCAN=y
# CONFIG_WIFI_PROV_STA_FAST_SCAN is not set
# end of Wi-Fi Provisioning Manager
#
# LVGL configuration
#
CONFIG_LV_CONF_SKIP=y
# CONFIG_LV_CONF_MINIMAL is not set
#
# Color Settings
#
# CONFIG_LV_COLOR_DEPTH_32 is not set
# CONFIG_LV_COLOR_DEPTH_24 is not set
CONFIG_LV_COLOR_DEPTH_16=y
# CONFIG_LV_COLOR_DEPTH_8 is not set
# CONFIG_LV_COLOR_DEPTH_1 is not set
CONFIG_LV_COLOR_DEPTH=16
# end of Color Settings
#
# Memory Settings
#
CONFIG_LV_USE_BUILTIN_MALLOC=y
# CONFIG_LV_USE_CLIB_MALLOC is not set
# CONFIG_LV_USE_MICROPYTHON_MALLOC is not set
# CONFIG_LV_USE_RTTHREAD_MALLOC is not set
# CONFIG_LV_USE_CUSTOM_MALLOC is not set
CONFIG_LV_USE_BUILTIN_STRING=y
# CONFIG_LV_USE_CLIB_STRING is not set
# CONFIG_LV_USE_CUSTOM_STRING is not set
CONFIG_LV_USE_BUILTIN_SPRINTF=y
# CONFIG_LV_USE_CLIB_SPRINTF is not set
# CONFIG_LV_USE_CUSTOM_SPRINTF is not set
CONFIG_LV_MEM_SIZE_KILOBYTES=64
CONFIG_LV_MEM_POOL_EXPAND_SIZE_KILOBYTES=0
CONFIG_LV_MEM_ADR=0x0
# end of Memory Settings
#
# HAL Settings
#
CONFIG_LV_DEF_REFR_PERIOD=33
CONFIG_LV_DPI_DEF=130
# end of HAL Settings
#
# Operating System (OS)
#
CONFIG_LV_OS_NONE=y
# CONFIG_LV_OS_PTHREAD is not set
# CONFIG_LV_OS_FREERTOS is not set
# CONFIG_LV_OS_CMSIS_RTOS2 is not set
# CONFIG_LV_OS_RTTHREAD is not set
# CONFIG_LV_OS_WINDOWS is not set
# CONFIG_LV_OS_MQX is not set
# CONFIG_LV_OS_CUSTOM is not set
CONFIG_LV_USE_OS=0
# end of Operating System (OS)
#
# Rendering Configuration
#
CONFIG_LV_DRAW_BUF_STRIDE_ALIGN=1
CONFIG_LV_DRAW_BUF_ALIGN=4
CONFIG_LV_DRAW_LAYER_SIMPLE_BUF_SIZE=24576
CONFIG_LV_USE_DRAW_SW=y
CONFIG_LV_DRAW_SW_SUPPORT_RGB565=y
CONFIG_LV_DRAW_SW_SUPPORT_RGB565A8=y
CONFIG_LV_DRAW_SW_SUPPORT_RGB888=y
CONFIG_LV_DRAW_SW_SUPPORT_XRGB8888=y
CONFIG_LV_DRAW_SW_SUPPORT_ARGB8888=y
CONFIG_LV_DRAW_SW_SUPPORT_L8=y
CONFIG_LV_DRAW_SW_SUPPORT_AL88=y
CONFIG_LV_DRAW_SW_SUPPORT_A8=y
CONFIG_LV_DRAW_SW_SUPPORT_I1=y
CONFIG_LV_DRAW_SW_DRAW_UNIT_CNT=1
# CONFIG_LV_USE_DRAW_ARM2D_SYNC is not set
# CONFIG_LV_USE_NATIVE_HELIUM_ASM is not set
CONFIG_LV_DRAW_SW_COMPLEX=y
# CONFIG_LV_USE_DRAW_SW_COMPLEX_GRADIENTS is not set
CONFIG_LV_DRAW_SW_SHADOW_CACHE_SIZE=0
CONFIG_LV_DRAW_SW_CIRCLE_CACHE_SIZE=4
CONFIG_LV_DRAW_SW_ASM_NONE=y
# CONFIG_LV_DRAW_SW_ASM_NEON is not set
# CONFIG_LV_DRAW_SW_ASM_HELIUM is not set
# CONFIG_LV_DRAW_SW_ASM_CUSTOM is not set
CONFIG_LV_USE_DRAW_SW_ASM=0
# CONFIG_LV_USE_DRAW_VGLITE is not set
# CONFIG_LV_USE_DRAW_PXP is not set
# CONFIG_LV_USE_DRAW_DAVE2D is not set
# CONFIG_LV_USE_DRAW_SDL is not set
# CONFIG_LV_USE_DRAW_VG_LITE is not set
# CONFIG_LV_USE_VECTOR_GRAPHIC is not set
# end of Rendering Configuration
#
# Feature Configuration
#
#
# Logging
#
# CONFIG_LV_USE_LOG is not set
# end of Logging
#
# Asserts
#
CONFIG_LV_USE_ASSERT_NULL=y
CONFIG_LV_USE_ASSERT_MALLOC=y
# CONFIG_LV_USE_ASSERT_STYLE is not set
# CONFIG_LV_USE_ASSERT_MEM_INTEGRITY is not set
# CONFIG_LV_USE_ASSERT_OBJ is not set
CONFIG_LV_ASSERT_HANDLER_INCLUDE="assert.h"
# end of Asserts
#
# Debug
#
# CONFIG_LV_USE_REFR_DEBUG is not set
# CONFIG_LV_USE_LAYER_DEBUG is not set
# CONFIG_LV_USE_PARALLEL_DRAW_DEBUG is not set
# end of Debug
#
# Others
#
# CONFIG_LV_ENABLE_GLOBAL_CUSTOM is not set
CONFIG_LV_CACHE_DEF_SIZE=0
CONFIG_LV_IMAGE_HEADER_CACHE_DEF_CNT=0
CONFIG_LV_GRADIENT_MAX_STOPS=2
CONFIG_LV_COLOR_MIX_ROUND_OFS=128
# CONFIG_LV_OBJ_STYLE_CACHE is not set
# CONFIG_LV_USE_OBJ_ID is not set
# CONFIG_LV_USE_OBJ_PROPERTY is not set
# end of Others
# end of Feature Configuration
#
# Compiler Settings
#
# CONFIG_LV_BIG_ENDIAN_SYSTEM is not set
CONFIG_LV_ATTRIBUTE_MEM_ALIGN_SIZE=1
# CONFIG_LV_ATTRIBUTE_FAST_MEM_USE_IRAM is not set
# CONFIG_LV_USE_FLOAT is not set
# CONFIG_LV_USE_MATRIX is not set
# CONFIG_LV_USE_PRIVATE_API is not set
# end of Compiler Settings
#
# Font Usage
#
#
# Enable built-in fonts
#
# CONFIG_LV_FONT_MONTSERRAT_8 is not set
# CONFIG_LV_FONT_MONTSERRAT_10 is not set
# CONFIG_LV_FONT_MONTSERRAT_12 is not set
CONFIG_LV_FONT_MONTSERRAT_14=y
# CONFIG_LV_FONT_MONTSERRAT_16 is not set
# CONFIG_LV_FONT_MONTSERRAT_18 is not set
# CONFIG_LV_FONT_MONTSERRAT_20 is not set
# CONFIG_LV_FONT_MONTSERRAT_22 is not set
# CONFIG_LV_FONT_MONTSERRAT_24 is not set
# CONFIG_LV_FONT_MONTSERRAT_26 is not set
# CONFIG_LV_FONT_MONTSERRAT_28 is not set
# CONFIG_LV_FONT_MONTSERRAT_30 is not set
# CONFIG_LV_FONT_MONTSERRAT_32 is not set
# CONFIG_LV_FONT_MONTSERRAT_34 is not set
# CONFIG_LV_FONT_MONTSERRAT_36 is not set
# CONFIG_LV_FONT_MONTSERRAT_38 is not set
# CONFIG_LV_FONT_MONTSERRAT_40 is not set
# CONFIG_LV_FONT_MONTSERRAT_42 is not set
# CONFIG_LV_FONT_MONTSERRAT_44 is not set
# CONFIG_LV_FONT_MONTSERRAT_46 is not set
# CONFIG_LV_FONT_MONTSERRAT_48 is not set
# CONFIG_LV_FONT_MONTSERRAT_28_COMPRESSED is not set
# CONFIG_LV_FONT_DEJAVU_16_PERSIAN_HEBREW is not set
# CONFIG_LV_FONT_SIMSUN_14_CJK is not set
# CONFIG_LV_FONT_SIMSUN_16_CJK is not set
# CONFIG_LV_FONT_UNSCII_8 is not set
# CONFIG_LV_FONT_UNSCII_16 is not set
# end of Enable built-in fonts
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_8 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_10 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_12 is not set
CONFIG_LV_FONT_DEFAULT_MONTSERRAT_14=y
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_16 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_18 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_20 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_22 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_24 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_26 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_28 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_30 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_32 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_34 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_36 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_38 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_40 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_42 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_44 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_46 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_48 is not set
# CONFIG_LV_FONT_DEFAULT_MONTSERRAT_28_COMPRESSED is not set
# CONFIG_LV_FONT_DEFAULT_DEJAVU_16_PERSIAN_HEBREW is not set
# CONFIG_LV_FONT_DEFAULT_SIMSUN_14_CJK is not set
# CONFIG_LV_FONT_DEFAULT_SIMSUN_16_CJK is not set
# CONFIG_LV_FONT_DEFAULT_UNSCII_8 is not set
# CONFIG_LV_FONT_DEFAULT_UNSCII_16 is not set
# CONFIG_LV_FONT_FMT_TXT_LARGE is not set
# CONFIG_LV_USE_FONT_COMPRESSED is not set
CONFIG_LV_USE_FONT_PLACEHOLDER=y
# end of Font Usage
#
# Text Settings
#
CONFIG_LV_TXT_ENC_UTF8=y
# CONFIG_LV_TXT_ENC_ASCII is not set
CONFIG_LV_TXT_BREAK_CHARS=" ,.;:-_)}"
CONFIG_LV_TXT_LINE_BREAK_LONG_LEN=0
# CONFIG_LV_USE_BIDI is not set
# CONFIG_LV_USE_ARABIC_PERSIAN_CHARS is not set
# end of Text Settings
#
# Widget Usage
#
CONFIG_LV_WIDGETS_HAS_DEFAULT_VALUE=y
CONFIG_LV_USE_ANIMIMG=y
CONFIG_LV_USE_ARC=y
CONFIG_LV_USE_BAR=y
CONFIG_LV_USE_BUTTON=y
CONFIG_LV_USE_BUTTONMATRIX=y
CONFIG_LV_USE_CALENDAR=y
# CONFIG_LV_CALENDAR_WEEK_STARTS_MONDAY is not set
CONFIG_LV_USE_CALENDAR_HEADER_ARROW=y
CONFIG_LV_USE_CALENDAR_HEADER_DROPDOWN=y
# CONFIG_LV_USE_CALENDAR_CHINESE is not set
CONFIG_LV_USE_CANVAS=y
CONFIG_LV_USE_CHART=y
CONFIG_LV_USE_CHECKBOX=y
CONFIG_LV_USE_DROPDOWN=y
CONFIG_LV_USE_IMAGE=y
CONFIG_LV_USE_IMAGEBUTTON=y
CONFIG_LV_USE_KEYBOARD=y
CONFIG_LV_USE_LABEL=y
CONFIG_LV_LABEL_TEXT_SELECTION=y
CONFIG_LV_LABEL_LONG_TXT_HINT=y
CONFIG_LV_LABEL_WAIT_CHAR_COUNT=3
CONFIG_LV_USE_LED=y
CONFIG_LV_USE_LINE=y
CONFIG_LV_USE_LIST=y
CONFIG_LV_USE_MENU=y
CONFIG_LV_USE_MSGBOX=y
CONFIG_LV_USE_ROLLER=y
CONFIG_LV_USE_SCALE=y
CONFIG_LV_USE_SLIDER=y
CONFIG_LV_USE_SPAN=y
CONFIG_LV_SPAN_SNIPPET_STACK_SIZE=64
CONFIG_LV_USE_SPINBOX=y
CONFIG_LV_USE_SPINNER=y
CONFIG_LV_USE_SWITCH=y
CONFIG_LV_USE_TEXTAREA=y
CONFIG_LV_TEXTAREA_DEF_PWD_SHOW_TIME=1500
CONFIG_LV_USE_TABLE=y
CONFIG_LV_USE_TABVIEW=y
CONFIG_LV_USE_TILEVIEW=y
CONFIG_LV_USE_WIN=y
# end of Widget Usage
#
# Themes
#
CONFIG_LV_USE_THEME_DEFAULT=y
# CONFIG_LV_THEME_DEFAULT_DARK is not set
CONFIG_LV_THEME_DEFAULT_GROW=y
CONFIG_LV_THEME_DEFAULT_TRANSITION_TIME=80
CONFIG_LV_USE_THEME_SIMPLE=y
# CONFIG_LV_USE_THEME_MONO is not set
# end of Themes
#
# Layouts
#
CONFIG_LV_USE_FLEX=y
CONFIG_LV_USE_GRID=y
# end of Layouts
#
# 3rd Party Libraries
#
CONFIG_LV_FS_DEFAULT_DRIVE_LETTER=0
# CONFIG_LV_USE_FS_STDIO is not set
# CONFIG_LV_USE_FS_POSIX is not set
# CONFIG_LV_USE_FS_WIN32 is not set
# CONFIG_LV_USE_FS_FATFS is not set
# CONFIG_LV_USE_FS_MEMFS is not set
# CONFIG_LV_USE_FS_LITTLEFS is not set
# CONFIG_LV_USE_FS_ARDUINO_ESP_LITTLEFS is not set
# CONFIG_LV_USE_FS_ARDUINO_SD is not set
# CONFIG_LV_USE_LODEPNG is not set
# CONFIG_LV_USE_LIBPNG is not set
# CONFIG_LV_USE_BMP is not set
# CONFIG_LV_USE_TJPGD is not set
# CONFIG_LV_USE_LIBJPEG_TURBO is not set
# CONFIG_LV_USE_GIF is not set
# CONFIG_LV_BIN_DECODER_RAM_LOAD is not set
# CONFIG_LV_USE_RLE is not set
# CONFIG_LV_USE_QRCODE is not set
# CONFIG_LV_USE_BARCODE is not set
# CONFIG_LV_USE_FREETYPE is not set
# CONFIG_LV_USE_TINY_TTF is not set
# CONFIG_LV_USE_RLOTTIE is not set
# CONFIG_LV_USE_THORVG is not set
# CONFIG_LV_USE_LZ4 is not set
# CONFIG_LV_USE_FFMPEG is not set
# end of 3rd Party Libraries
#
# Others
#
# CONFIG_LV_USE_SNAPSHOT is not set
# CONFIG_LV_USE_SYSMON is not set
# CONFIG_LV_USE_PROFILER is not set
# CONFIG_LV_USE_MONKEY is not set
# CONFIG_LV_USE_GRIDNAV is not set
# CONFIG_LV_USE_FRAGMENT is not set
# CONFIG_LV_USE_IMGFONT is not set
CONFIG_LV_USE_OBSERVER=y
# CONFIG_LV_USE_IME_PINYIN is not set
# CONFIG_LV_USE_FILE_EXPLORER is not set
# end of Others
#
# Devices
#
# CONFIG_LV_USE_SDL is not set
# CONFIG_LV_USE_X11 is not set
# CONFIG_LV_USE_WAYLAND is not set
# CONFIG_LV_USE_LINUX_FBDEV is not set
# CONFIG_LV_USE_NUTTX is not set
# CONFIG_LV_USE_LINUX_DRM is not set
# CONFIG_LV_USE_TFT_ESPI is not set
# CONFIG_LV_USE_EVDEV is not set
# CONFIG_LV_USE_LIBINPUT is not set
# CONFIG_LV_USE_ST7735 is not set
# CONFIG_LV_USE_ST7789 is not set
# CONFIG_LV_USE_ST7796 is not set
# CONFIG_LV_USE_ILI9341 is not set
# CONFIG_LV_USE_GENERIC_MIPI is not set
# CONFIG_LV_USE_RENESAS_GLCDC is not set
# CONFIG_LV_USE_OPENGLES is not set
# CONFIG_LV_USE_QNX is not set
# end of Devices
#
# Examples
#
CONFIG_LV_BUILD_EXAMPLES=y
# end of Examples
#
# Demos
#
# CONFIG_LV_USE_DEMO_WIDGETS is not set
# CONFIG_LV_USE_DEMO_KEYPAD_AND_ENCODER is not set
# CONFIG_LV_USE_DEMO_RENDER is not set
# CONFIG_LV_USE_DEMO_SCROLL is not set
# CONFIG_LV_USE_DEMO_STRESS is not set
# CONFIG_LV_USE_DEMO_MUSIC is not set
# CONFIG_LV_USE_DEMO_FLEX_LAYOUT is not set
# CONFIG_LV_USE_DEMO_MULTILANG is not set
# end of Demos
# end of LVGL configuration
# end of Component config
# CONFIG_IDF_EXPERIMENTAL_FEATURES is not set

13
esp/cpp/components/i2c/include/i2c.h
View File

@ -14,7 +14,7 @@
#include <driver/i2c_master.h>
/// Tag used for ESP logging.
static const char* TAG = "I2C component";
static const char* I2C_TAG = "I2C component";
/**
* Construct an ESP I2C master bus given a specific ESP I2C configuration.
@ -22,10 +22,10 @@ static const char* TAG = "I2C component";
*
* @param config ESP I2C master bus configuration.
*/
inline void init_config_i2c(const i2c_master_bus_config_t config)
inline void I2C_config_init(const i2c_master_bus_config_t config)
{
i2c_master_bus_handle_t i2c;
ESP_LOGI(TAG, "Initializing new master I2C bus");
ESP_LOGI(I2C_TAG, "Initializing new master I2C bus");
ESP_ERROR_CHECK(i2c_new_master_bus(&config, &i2c));
}
@ -36,9 +36,9 @@ inline void init_config_i2c(const i2c_master_bus_config_t config)
* @param sda GPIO pin for SDA
* @param scl GPIO pin for SCL
*/
inline void init_i2c(gpio_num_t sda, gpio_num_t scl)
inline void I2C_init(gpio_num_t sda, gpio_num_t scl)
{
return init_config_i2c((i2c_master_bus_config_t){
return I2C_config_init((i2c_master_bus_config_t){
.i2c_port = I2C_BUS_PORT,
.sda_io_num = sda,
.scl_io_num = scl,
@ -55,12 +55,11 @@ inline void init_i2c(gpio_num_t sda, gpio_num_t scl)
* ESP I2C master bus handle getter.
* This will fail if an I2C instance was never constructed.
*/
static i2c_master_bus_handle_t get()
static i2c_master_bus_handle_t I2C_get()
{
i2c_master_bus_handle_t i2c = NULL;
ESP_ERROR_CHECK(i2c_master_get_bus_handle(0, &i2c));
return i2c;
}
#endif //I2C_H