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Re implement display

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This commit is contained in:
GW_MC
2026-01-26 18:17:39 +08:00
parent abe840b65d
commit 30dfdd630a
12 changed files with 1780 additions and 849 deletions
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main/display/display.cpp → main/display/display.cpp.old
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main/display/display.h → main/display/display.h.old
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main/display/eink_display_handler.cpp
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main/display/eink_display_handler.cpp.old Normal file
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#include "display/eink_display_handler.h"
#include "display/constants.h"
#include "common/constants.h"
#include "esp_log.h"
#include "esp_heap_caps.h"
#include "esp_task_wdt.h"
#include <cstring>
#define TAG "EInkDisplayHandler"
#define BUSY_ACTIVE_LEVEL 0 // BUSY pin is active low
#define BUSY_INACTIVE_LEVEL 1
EInkDisplayHandler::EInkDisplayHandler(EventGroupHandle_t system_event_group)
: DisplayHandler(system_event_group) {
_refresh_mutex = xSemaphoreCreateMutex();
if (_refresh_mutex == nullptr) {
ESP_LOGE(TAG, "Failed to create refresh mutex");
}
}
EInkDisplayHandler::~EInkDisplayHandler() {
if (_refresh_task_handle != nullptr) {
vTaskDelete(_refresh_task_handle);
}
if (_touch_task_handle != nullptr) {
vTaskDelete(_touch_task_handle);
}
if (_refresh_queue != nullptr) {
vQueueDelete(_refresh_queue);
}
if (_lvgl_display != nullptr) {
lv_display_delete(_lvgl_display);
_lvgl_display = nullptr;
if (_lvgl_draw_buf != nullptr) {
lv_draw_buf_destroy(_lvgl_draw_buf);
_lvgl_draw_buf = nullptr;
}
}
if (_lvgl_touch_indev != nullptr) {
lvgl_port_remove_touch(_lvgl_touch_indev);
}
if (_framebuffer != nullptr) {
heap_caps_free(_framebuffer);
}
if (_refresh_mutex != nullptr) {
vSemaphoreDelete(_refresh_mutex);
}
}
void EInkDisplayHandler::init() {
ESP_LOGI(TAG, "Initializing E-Ink display handler...");
// Initialize GPIO pins
gpio_config_t io_conf = {};
io_conf.pin_bit_mask = (1ULL << PIN_DC) | (1ULL << PIN_RST);
io_conf.mode = GPIO_MODE_OUTPUT;
io_conf.pull_up_en = GPIO_PULLUP_DISABLE;
io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
io_conf.intr_type = GPIO_INTR_DISABLE;
gpio_config(&io_conf);
// Configure BUSY pin as input (no pull-up like sample code)
io_conf.pin_bit_mask = (1ULL << PIN_BUSY);
io_conf.mode = GPIO_MODE_INPUT;
io_conf.pull_up_en = GPIO_PULLUP_DISABLE;
gpio_config(&io_conf);
// Initialize SPI bus
spi_bus_config_t buscfg = {};
buscfg.mosi_io_num = 11; // MOSI pin
buscfg.miso_io_num = -1; // No MISO for e-paper
buscfg.sclk_io_num = 12; // SCK pin
buscfg.quadwp_io_num = -1;
buscfg.quadhd_io_num = -1;
buscfg.max_transfer_sz = DISPLAY_BUFFER_SIZE;
esp_err_t ret = spi_bus_initialize(SPI2_HOST, &buscfg, SPI_DMA_CH_AUTO);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to initialize SPI bus: %s", esp_err_to_name(ret));
return;
}
// Add SPI device
spi_device_interface_config_t devcfg = {};
devcfg.clock_speed_hz = 6 * 1000 * 1000; // 6 MHz (reduced for reliability)
devcfg.mode = 0; // SPI mode 0
devcfg.spics_io_num = PIN_CS;
devcfg.queue_size = 7; // Queue size for non-blocking transactions
devcfg.pre_cb = nullptr;
ret = spi_bus_add_device(SPI2_HOST, &devcfg, &_spi);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to add SPI device: %s", esp_err_to_name(ret));
return;
}
// Initialize base display and touch devices
init_devices(false); // Don't set ready bit yet
// Create refresh queue (queue 5 refresh requests)
_refresh_queue = xQueueCreate(5, sizeof(bool));
if (_refresh_queue == nullptr) {
ESP_LOGE(TAG, "Failed to create refresh queue");
return;
}
// Create refresh task
BaseType_t ret_task = xTaskCreatePinnedToCore(
_refresh_task,
"eink_refresh",
8192,
this,
5, // Priority - lower than LVGL task
&_refresh_task_handle,
1 // Pin to core 1
);
if (ret_task != pdPASS) {
ESP_LOGE(TAG, "Failed to create refresh task");
return;
}
// Allocate framebuffer - try PSRAM first, fallback to internal RAM
// Note: Internal framebuffer excludes the 8-byte palette (raw pixel data only)
const size_t fb_size = DISPLAY_BUFFER_SIZE - 8; // Exclude palette from internal storage
_framebuffer = (uint8_t*)heap_caps_malloc(fb_size, MALLOC_CAP_SPIRAM);
if (_framebuffer != nullptr) {
_framebuffer_in_psram = true;
ESP_LOGI(TAG, "Framebuffer allocated in PSRAM (%zu bytes, LVGL buffer: %d bytes)",
fb_size, DISPLAY_BUFFER_SIZE);
} else {
ESP_LOGW(TAG, "PSRAM not available, allocating framebuffer in internal RAM");
_framebuffer = (uint8_t*)heap_caps_malloc(fb_size, MALLOC_CAP_INTERNAL);
_framebuffer_in_psram = false;
if (_framebuffer == nullptr) {
ESP_LOGE(TAG, "Failed to allocate framebuffer");
return;
}
ESP_LOGI(TAG, "Framebuffer allocated in internal RAM (%zu bytes, LVGL buffer: %d bytes)",
fb_size, DISPLAY_BUFFER_SIZE);
}
memset(_framebuffer, 0xFF, fb_size); // Initialize to white
// Perform initial full refresh to clear display BEFORE creating LVGL display
// This prevents LVGL from trying to render during the initial clear
ESP_LOGI(TAG, "Performing initial display clear...");
_perform_full_refresh(_framebuffer);
ESP_LOGI(TAG, "Initial display clear complete");
// Create LVGL display manually (no esp_lcd panel for e-paper)
lv_display_t* disp = lv_display_create(DISPLAY_WIDTH, DISPLAY_HEIGHT);
if (disp == nullptr) {
ESP_LOGE(TAG, "Failed to create LVGL display");
return;
}
/* 1-bit e-paper display */
lv_display_set_color_format(disp, LV_COLOR_FORMAT_I1);
/* Disable antialiasing for monochrome display to ensure crisp 1px lines */
lv_display_set_antialiasing(disp, false);
/* Create a draw buffer covering ~40 lines */
_lvgl_draw_buf = lv_draw_buf_create(DISPLAY_WIDTH, DISPLAY_HEIGHT, LV_COLOR_FORMAT_I1, LV_STRIDE_AUTO);
if (_lvgl_draw_buf == nullptr) {
ESP_LOGE(TAG, "Failed to create LVGL draw buffer");
lv_display_delete(disp);
return;
}
lv_display_set_draw_buffers(disp, _lvgl_draw_buf, NULL);
lv_display_set_render_mode(disp, LV_DISPLAY_RENDER_MODE_DIRECT);
// Set custom flush callback and user data
lv_display_set_flush_cb(disp, _lvgl_flush_cb);
lv_display_set_user_data(disp, this);
_lvgl_display = disp;
ESP_LOGI(TAG, "LVGL display registered");
// Register GT911 touch input with LVGL, only if touch handle is valid
esp_lcd_touch_handle_t tp_handle = get_touch_handle();
if (tp_handle == nullptr) {
ESP_LOGE(TAG, "Touch handle is NULL — touch initialization failed; skipping LVGL touch registration");
} else {
const lvgl_port_touch_cfg_t touch_cfg = {
.disp = _lvgl_display,
.handle = tp_handle,
.scale = {}, // Default scaling
};
_lvgl_touch_indev = lvgl_port_add_touch(&touch_cfg);
if (_lvgl_touch_indev == nullptr) {
ESP_LOGE(TAG, "Failed to register LVGL touch input");
return;
}
// Override touch read callback to check BUSY pin
lv_indev_set_read_cb(_lvgl_touch_indev, _lvgl_touch_read_cb);
lv_indev_set_user_data(_lvgl_touch_indev, this);
ESP_LOGI(TAG, "LVGL touch input registered");
}
// Set display ready bits
xEventGroupSetBits(_system_event_group, DISPLAY_READY_BIT | TOUCH_CALIBRATED_BIT);
ESP_LOGI(TAG, "E-Ink display handler initialized successfully");
}
void EInkDisplayHandler::start_touch_task() {
// Note: With lvgl_port_add_touch, the ESP-IDF LVGL port handles touch reading internally
// We don't need a separate touch task unless we want custom processing
ESP_LOGI(TAG, "Touch input handled by LVGL port");
}
void EInkDisplayHandler::request_full_refresh() {
if (xSemaphoreTake(_refresh_mutex, pdMS_TO_TICKS(100)) == pdTRUE) {
_force_full_refresh = true;
_partial_refresh_count = 0;
xSemaphoreGive(_refresh_mutex);
ESP_LOGI(TAG, "Full refresh requested");
}
}
bool EInkDisplayHandler::is_busy() const {
return gpio_get_level(PIN_BUSY) == BUSY_ACTIVE_LEVEL; // BUSY is active LOW
}
void EInkDisplayHandler::_lvgl_flush_cb(lv_display_t* disp, const lv_area_t* area, uint8_t* px_map) {
EInkDisplayHandler* handler = static_cast<EInkDisplayHandler*>(lv_display_get_user_data(disp));
if (handler == nullptr) {
ESP_LOGE(TAG, "Invalid handler in flush callback");
lv_display_flush_ready(disp);
return;
}
// Check if display is busy with detailed logging
int busy_level = gpio_get_level(PIN_BUSY);
ESP_LOGI(TAG, "Flush callback: BUSY pin = %d, is_busy() = %d", busy_level, handler->is_busy());
if (handler->is_busy()) {
ESP_LOGW(TAG, "Display busy (BUSY pin = 0), skipping flush");
lv_display_flush_ready(disp);
return;
}
// Wait for any ongoing refresh to complete
handler->_wait_for_busy();
bool perform_full_refresh = false;
if (xSemaphoreTake(handler->_refresh_mutex, pdMS_TO_TICKS(100)) == pdTRUE) {
// Check if full refresh is needed
if (handler->_force_full_refresh) {
perform_full_refresh = true;
handler->_force_full_refresh = false;
handler->_partial_refresh_count = 0;
} else {
handler->_partial_refresh_count++;
if (handler->_partial_refresh_count >= PARTIAL_REFRESH_THRESHOLD) {
perform_full_refresh = true;
handler->_partial_refresh_count = 0;
}
}
xSemaphoreGive(handler->_refresh_mutex);
}
// Copy LVGL buffer to framebuffer
// For 1-bit mode, LVGL provides data in packed format (8 pixels per byte)
// CRITICAL: Skip first 8 bytes (LVGL I1 palette) as per LVGL documentation
uint8_t* pixel_data = px_map + 8; // Skip 8-byte palette
int32_t w = lv_area_get_width(area);
int32_t h = lv_area_get_height(area);
ESP_LOGI(TAG, "Flushing area: x=%d, y=%d, w=%d, h=%d, full_refresh=%d",
area->x1, area->y1, w, h, perform_full_refresh);
ESP_LOGI(TAG, "Buffer: px_map=%p, pixel_data=%p, palette skipped: %d bytes",
(void*)px_map, (void*)pixel_data, 8);
// Check if this is a full screen update - if so, simple copy
if (area->x1 == 0 && area->y1 == 0 && w == DISPLAY_WIDTH && h == DISPLAY_HEIGHT) {
ESP_LOGI(TAG, "Full screen update, direct copy (skipping palette)");
memcpy(handler->_framebuffer, pixel_data, DISPLAY_BUFFER_SIZE - 8);
} else {
ESP_LOGI(TAG, "Partial area update");
// In DIRECT render mode, px_map points to the full screen buffer
// The stride is always the full display width
const uint32_t stride = DISPLAY_WIDTH / 8; // 800 / 8 = 100 bytes per row
// Check if we can do row-by-row copy (byte-aligned on both x1 and width)
bool byte_aligned = (area->x1 % 8 == 0) && (w % 8 == 0);
if (byte_aligned) {
// Optimized: byte-aligned row copy
ESP_LOGI(TAG, "Byte-aligned copy: x=%ld, y=%ld, w=%ld, h=%ld",
(long)area->x1, (long)area->y1, (long)w, (long)h);
uint32_t x_byte = area->x1 / 8;
uint32_t width_bytes = w / 8;
for (int32_t y = 0; y < h; y++) {
int32_t fb_y = area->y1 + y;
if (fb_y >= DISPLAY_HEIGHT) break;
uint8_t* src = pixel_data + (fb_y * stride + x_byte);
uint8_t* dst = handler->_framebuffer + (fb_y * stride + x_byte);
memcpy(dst, src, width_bytes);
}
} else {
// Bit-level copy for non-aligned regions
ESP_LOGI(TAG, "Bit-level copy: x=%ld, y=%ld, w=%ld, h=%ld",
(long)area->x1, (long)area->y1, (long)w, (long)h);
for (int32_t y = 0; y < h; y++) {
int32_t fb_y = area->y1 + y;
if (fb_y >= DISPLAY_HEIGHT) break;
for (int32_t x = 0; x < w; x++) {
int32_t fb_x = area->x1 + x;
if (fb_x >= DISPLAY_WIDTH) break;
// Get pixel from source buffer (using full screen coordinates)
size_t src_byte_idx = fb_y * stride + (fb_x / 8);
size_t src_bit_idx = fb_x % 8;
uint8_t src_bit = (pixel_data[src_byte_idx] >> (7 - src_bit_idx)) & 0x01;
// Set pixel in destination buffer
size_t dst_byte_idx = fb_y * stride + (fb_x / 8);
size_t dst_bit_idx = fb_x % 8;
if (dst_byte_idx < (DISPLAY_BUFFER_SIZE - 8)) {
if (src_bit) {
handler->_framebuffer[dst_byte_idx] |= (1 << (7 - dst_bit_idx));
} else {
handler->_framebuffer[dst_byte_idx] &= ~(1 << (7 - dst_bit_idx));
}
}
}
}
}
}
// Queue refresh request (non-blocking)
if (handler->_refresh_queue != nullptr) {
if (xQueueSend(handler->_refresh_queue, &perform_full_refresh, 0) != pdPASS) {
ESP_LOGW(TAG, "Refresh queue full, skipping refresh");
} else {
ESP_LOGI(TAG, "Queued %s refresh", perform_full_refresh ? "full" : "partial");
}
}
lv_display_flush_ready(disp);
}
void EInkDisplayHandler::_lvgl_touch_read_cb(lv_indev_t* indev, lv_indev_data_t* data) {
EInkDisplayHandler* handler = static_cast<EInkDisplayHandler*>(lv_indev_get_user_data(indev));
// Disable touch input during display refresh (BUSY)
if (handler->is_busy()) {
data->state = LV_INDEV_STATE_RELEASED;
data->continue_reading = false;
return;
}
esp_lcd_touch_handle_t tp_handle = handler->get_touch_handle();
if (tp_handle == nullptr) {
data->state = LV_INDEV_STATE_RELEASED;
return;
}
// Read touch data from GT911
esp_err_t ret = esp_lcd_touch_read_data(tp_handle);
if (ret == ESP_OK) {
uint8_t touch_cnt = 0;
// Get touch data using new API
esp_lcd_touch_point_data_t point_data[1];
esp_lcd_touch_get_data(tp_handle, point_data, &touch_cnt, 1);
if (touch_cnt > 0) {
ESP_LOGI(TAG, "Touch data read successfully: x=%d, y=%d", point_data[0].x, point_data[0].y);
data->point.x = point_data[0].x;
data->point.y = point_data[0].y;
data->state = LV_INDEV_STATE_PRESSED;
} else {
data->state = LV_INDEV_STATE_RELEASED;
}
} else {
data->state = LV_INDEV_STATE_RELEASED;
}
data->continue_reading = false;
}
void EInkDisplayHandler::_perform_full_refresh(const uint8_t* framebuffer) {
ESP_LOGI(TAG, "Starting full refresh (3 seconds)...");
_wait_for_busy();
// Step 1: Write old data (0x10) - Arduino uses 0xFF (all white) for base map
epd_write_cmd(0x10);
if (xSemaphoreTake(_spi_mutex, pdMS_TO_TICKS(5000)) != pdTRUE) {
ESP_LOGE(TAG, "SPI mutex timeout in full refresh step 1");
return;
}
gpio_set_level(PIN_DC, 1); // Data mode
ESP_LOGI(TAG, "Starting SPI data transmission for old data (0x10)...");
// Send 0xFF (white) for all old data, matching Arduino EPD_SetRAMValue_BaseMap
// Use DMA transfers in chunks for better performance
static uint8_t white_buffer[4096]; // 4KB chunk buffer
memset(white_buffer, 0xFF, sizeof(white_buffer));
const size_t CHUNK_SIZE = sizeof(white_buffer);
size_t remaining = DISPLAY_BUFFER_SIZE - 8; // Exclude palette from transmission
size_t offset = 0;
while (remaining > 0) {
size_t transfer_size = (remaining < CHUNK_SIZE) ? remaining : CHUNK_SIZE;
spi_transaction_t t = {};
t.length = transfer_size * 8; // Length in bits
t.tx_buffer = white_buffer;
esp_err_t ret = spi_device_polling_transmit(_spi, &t);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to send SPI chunk at offset %zu: %s", offset, esp_err_to_name(ret));
break;
}
remaining -= transfer_size;
offset += transfer_size;
// Yield every 16KB to prevent watchdog timeout
if (offset % (16 * 1024) == 0) {
ESP_LOGI(TAG, "Old data progress: %zu/%zu bytes (%.1f%%)", offset, remaining,
(float)offset * 100.0f / (float)remaining);
vTaskDelay(pdMS_TO_TICKS(1));
}
}
ESP_LOGI(TAG, "Completed SPI data transmission for old data");
xSemaphoreGive(_spi_mutex);
// Step 2: Write new data (0x13)
epd_write_cmd(0x13);
if (xSemaphoreTake(_spi_mutex, pdMS_TO_TICKS(5000)) != pdTRUE) {
ESP_LOGE(TAG, "SPI mutex timeout in full refresh step 2");
return;
}
gpio_set_level(PIN_DC, 1); // Data mode
ESP_LOGI(TAG, "Starting SPI data transmission for new data (0x13)...");
// Send actual framebuffer data in chunks using DMA for better performance
offset = 0;
remaining = DISPLAY_BUFFER_SIZE - 8; // Reset remaining for step 2
while (remaining > 0) {
size_t transfer_size = (remaining < CHUNK_SIZE) ? remaining : CHUNK_SIZE;
spi_transaction_t t = {};
t.length = transfer_size * 8; // Length in bits
t.tx_buffer = framebuffer + offset;
esp_err_t ret = spi_device_polling_transmit(_spi, &t);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to send SPI chunk at offset %zu: %s", offset, esp_err_to_name(ret));
break;
}
remaining -= transfer_size;
offset += transfer_size;
// Yield every 16KB to prevent watchdog timeout
if (offset % (16 * 1024) == 0) {
ESP_LOGI(TAG, "New data progress: %zu/%zu bytes (%.1f%%)", offset, remaining,
(float)offset * 100.0f / (float)remaining);
vTaskDelay(pdMS_TO_TICKS(1));
}
}
ESP_LOGI(TAG, "Completed SPI data transmission for new data");
xSemaphoreGive(_spi_mutex);
// Step 3: Trigger display refresh (DRF)
epd_write_cmd(0x12);
// Critical delay - sample code says "!!!The delay here is necessary, 200uS at least!!!"
vTaskDelay(pdMS_TO_TICKS(10));
ESP_LOGI(TAG, "Display refresh triggered, BUSY pin: %d", gpio_get_level(PIN_BUSY));
// Wait for refresh to complete
_wait_for_busy();
ESP_LOGI(TAG, "Full refresh complete");
}
void EInkDisplayHandler::_perform_partial_refresh(const uint8_t* framebuffer) {
ESP_LOGI(TAG, "Starting partial refresh (0.3 seconds)...");
_wait_for_busy();
// Step 1: Configure VCOM for partial refresh
const uint8_t vcom_data[] = { 0xA9, 0x07 };
epd_write_cmd_with_data(0x50, vcom_data, 2);
// Step 2: Enter partial refresh mode
epd_write_cmd(0x91);
// Step 3: Define partial window (full screen for now)
// Format: 0x90 + 9 bytes (x_start_H, x_start_L, x_end_H, x_end_L, y_start_H, y_start_L, y_end_H, y_end_L, 0x01)
// For full screen: x=0 to 799 (0x031F), y=0 to 479 (0x01DF)
const uint8_t window_data[] = {
0x00, 0x00, // x_start = 0
0x03, 0x1F, // x_end = 799 (0x31F)
0x00, 0x00, // y_start = 0
0x01, 0xDF, // y_end = 479 (0x1DF)
0x01 // PT_SCAN
};
epd_write_cmd_with_data(0x90, window_data, 9);
// Step 4: Write new data (0x13 command)
epd_write_cmd(0x13);
if (xSemaphoreTake(_spi_mutex, pdMS_TO_TICKS(5000)) != pdTRUE) {
ESP_LOGE(TAG, "SPI mutex timeout in partial refresh");
return;
}
gpio_set_level(PIN_DC, 1); // Data mode
ESP_LOGI(TAG, "Starting SPI data transmission for partial refresh...");
// Send framebuffer data in chunks using DMA for better performance
const size_t CHUNK_SIZE = 4096; // 4KB chunks
size_t remaining = DISPLAY_BUFFER_SIZE - 8; // Exclude palette from transmission
size_t offset = 0;
while (remaining > 0) {
size_t transfer_size = (remaining < CHUNK_SIZE) ? remaining : CHUNK_SIZE;
spi_transaction_t t = {};
t.length = transfer_size * 8; // Length in bits
t.tx_buffer = framebuffer + offset;
esp_err_t ret = spi_device_polling_transmit(_spi, &t);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to send SPI chunk at offset %zu: %s", offset, esp_err_to_name(ret));
break;
}
remaining -= transfer_size;
offset += transfer_size;
// Yield every 16KB to prevent watchdog timeout
if (offset % (16 * 1024) == 0) {
ESP_LOGI(TAG, "Partial refresh progress: %zu/%zu bytes (%.1f%%)", offset, remaining,
(float)offset * 100.0f / (float)remaining);
vTaskDelay(pdMS_TO_TICKS(1));
}
}
ESP_LOGI(TAG, "Completed SPI data transmission for partial refresh");
xSemaphoreGive(_spi_mutex);
// Step 5: Trigger partial display refresh (DRF)
epd_write_cmd(0x12);
// Critical delay - sample code says "!!!The delay here is necessary, 200uS at least!!!"
vTaskDelay(pdMS_TO_TICKS(10));
ESP_LOGI(TAG, "Partial refresh triggered, BUSY pin: %d", gpio_get_level(PIN_BUSY));
// Wait for refresh to complete
_wait_for_busy();
// Step 6: Exit partial refresh mode
epd_write_cmd(0x92);
ESP_LOGI(TAG, "Partial refresh complete");
}
void EInkDisplayHandler::_refresh_task(void* param) {
EInkDisplayHandler* handler = static_cast<EInkDisplayHandler*>(param);
bool perform_full_refresh = false;
ESP_LOGI(TAG, "Refresh task started");
while (true) {
// Wait for refresh request
if (xQueueReceive(handler->_refresh_queue, &perform_full_refresh, portMAX_DELAY) == pdTRUE) {
// Perform the requested refresh type
if (perform_full_refresh) {
ESP_LOGI(TAG, "Refresh task: Performing full refresh...");
handler->_perform_full_refresh(handler->_framebuffer);
} else {
ESP_LOGI(TAG, "Refresh task: Performing partial refresh...");
handler->_perform_partial_refresh(handler->_framebuffer);
}
}
}
}
void EInkDisplayHandler::_wait_for_busy() {
ESP_LOGI(TAG, "Waiting for display ready (BUSY pin)...");
int initial_level = gpio_get_level(PIN_BUSY);
ESP_LOGI(TAG, "Initial BUSY pin level: %d (0=BUSY, 1=FREE)", initial_level);
// If already free, no need to wait
if (initial_level == BUSY_INACTIVE_LEVEL) {
ESP_LOGI(TAG, "Display already ready (BUSY pin = 1)");
return;
}
int timeout = 0;
while (gpio_get_level(PIN_BUSY) == BUSY_ACTIVE_LEVEL) { // 0=BUSY, 1=FREE
vTaskDelay(pdMS_TO_TICKS(100));
timeout++;
if (timeout > 100) { // 10 second timeout
ESP_LOGE(TAG, "Display BUSY timeout! Pin level: %d", gpio_get_level(PIN_BUSY));
ESP_LOGW(TAG, "Attempting hardware reset...");
// Hardware reset sequence
gpio_set_level(PIN_RST, 0);
vTaskDelay(pdMS_TO_TICKS(10));
gpio_set_level(PIN_RST, 1);
vTaskDelay(pdMS_TO_TICKS(100));
// Re-initialize display
ESP_LOGI(TAG, "Re-initializing display after reset...");
_epd_init();
// Check if reset worked
int reset_timeout = 0;
while (gpio_get_level(PIN_BUSY) == BUSY_ACTIVE_LEVEL) {
vTaskDelay(pdMS_TO_TICKS(100));
reset_timeout++;
if (reset_timeout > 50) { // 5 second timeout after reset
ESP_LOGE(TAG, "Display reset failed! Still busy after reset.");
break;
}
}
if (gpio_get_level(PIN_BUSY) != BUSY_ACTIVE_LEVEL) {
ESP_LOGI(TAG, "Display reset successful after %d tenths of a second", reset_timeout);
}
break;
}
// Log every 2 seconds to track progress
if (timeout % 20 == 0) {
ESP_LOGW(TAG, "Still waiting for BUSY pin, timeout: %d/100, level: %d",
timeout, gpio_get_level(PIN_BUSY));
}
}
ESP_LOGI(TAG, "Display ready after %d tenths of a second", timeout);
}
void EInkDisplayHandler::_convert_buffer_to_epaper(const uint8_t* lvgl_buf, uint8_t* epd_buf, size_t size) {
// LVGL 1-bit format is already compatible with e-paper
// Just copy directly
memcpy(epd_buf, lvgl_buf, size);
}

112
main/display/eink_display_handler.h
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@@ -1,59 +1,99 @@
#pragma once
#include "display/display.h"
#include "lvgl.h"
#include "esp_lvgl_port.h"
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"
#include "esp_lcd_touch_gt911.h"
#include "common/semaphore_guard.h"
#include <vector>
// Refresh mode configuration
#define PARTIAL_REFRESH_THRESHOLD 10 // Full refresh every N partial refreshes
#define DISPLAY_WIDTH 800
#define DISPLAY_HEIGHT 480
#define DISPLAY_BUFFER_SIZE ((DISPLAY_WIDTH * DISPLAY_HEIGHT) / 8) // 1-bit per pixel
class EInkDisplayHandler : public DisplayHandler {
// forward declarations
class EInkDisplayHandler;
struct RefreshArea {
public:
EInkDisplayHandler(EventGroupHandle_t system_event_group);
RefreshArea(int32_t x_start, int32_t y_start, int32_t x_end, int32_t y_end)
: x1(x_start), y1(y_start), x2(x_end), y2(y_end) { }
int32_t x1;
int32_t y1;
int32_t x2;
int32_t y2;
};
class EInkDisplayHandler {
public:
EInkDisplayHandler();
virtual ~EInkDisplayHandler();
void init();
void start_touch_task();
esp_err_t init_devices(EventGroupHandle_t system_event_group = nullptr);
esp_err_t refresh_display(void);
esp_err_t full_write(const uint8_t* framebuffer);
esp_err_t partial_refresh(const uint8_t* framebuffer, const RefreshArea& area);
esp_err_t clear_display(void);
// Request a full refresh on next flush
void request_full_refresh();
void request_full_refresh(void);
// Check if display is busy (refreshing)
bool is_busy() const;
bool is_busy(void) const;
void wait_for_idle(void) const;
esp_lcd_touch_handle_t get_touch_handle() const { return tp_handle_; }
protected:
esp_err_t epd_write_cmd(const uint8_t cmd, uint32_t transaction_id);
esp_err_t epd_write_data(const uint8_t data, uint32_t transaction_id);
esp_err_t epd_write_cmd_with_data(const uint8_t cmd, std::vector<uint8_t>& data, uint32_t transaction_id);
esp_err_t transfer_spi_data(const uint8_t* data, const size_t& length, uint32_t transaction_id);
private:
// LVGL display and input device handles
lv_display_t* _lvgl_display = nullptr;
lv_indev_t* _lvgl_touch_indev = nullptr;
lv_draw_buf_t* _lvgl_draw_buf = nullptr;
// Framebuffer
uint8_t* _framebuffer = nullptr;
bool _framebuffer_in_psram = false;
esp_err_t init_display_pins_(void);
esp_err_t epd_init_(void);
esp_err_t init_touch_(void);
esp_err_t dangerous_epd_write_cmd_without_lock_(const uint8_t cmd);
esp_err_t dangerous_epd_write_data_without_lock_(const uint8_t data);
// Refresh tracking
uint32_t _partial_refresh_count = 0;
bool _force_full_refresh = false;
SemaphoreHandle_t _refresh_mutex = nullptr;
esp_err_t begin_transaction_(TickType_t timeout, uint32_t& out_id);
esp_err_t end_transaction_(void);
// given a transaction ID, wait for current transaction to complete. The transaction ID will determine if the wait is needed.
esp_err_t wait_for_transaction_end_(TickType_t timeout, uint32_t awaiting_transaction_id, SemaphoreGuard& out_transaction_guard);
// Touch task
TaskHandle_t _touch_task_handle = nullptr;
friend class TransactionGuard;
// LVGL callbacks
static void _lvgl_flush_cb(lv_display_t* disp, const lv_area_t* area, uint8_t* px_map);
static void _lvgl_touch_read_cb(lv_indev_t* indev, lv_indev_data_t* data);
uint32_t partial_refresh_count_ = 0;
bool force_full_refresh_ = false;
// Display operations
void _perform_full_refresh(const uint8_t* framebuffer);
void _perform_partial_refresh(const uint8_t* framebuffer);
void _wait_for_busy();
// Touch task
static void _touch_task(void* param);
// Helper to convert LVGL 1-bit buffer to e-paper format
void _convert_buffer_to_epaper(const uint8_t* lvgl_buf, uint8_t* epd_buf, size_t size);
SemaphoreHandle_t spi_mutex_ = nullptr;
SemaphoreHandle_t spi_transaction_mutex_ = nullptr;
SemaphoreHandle_t refresh_mutex_ = nullptr;
uint32_t spi_transaction_id = 0; // For tracking SPI transactions
spi_device_handle_t spi_ = nullptr;
esp_lcd_panel_io_handle_t tp_io_handle_ = nullptr;
esp_lcd_touch_handle_t tp_handle_ = nullptr;
};
class TransactionGuard {
public:
TransactionGuard(EInkDisplayHandler& handler, TickType_t timeout = portMAX_DELAY)
: handler_(handler) { }
~TransactionGuard() { if (transaction_id_) handler_.end_transaction_(); }
esp_err_t begin(TickType_t timeout = portMAX_DELAY) {
esp_err_t err = handler_.begin_transaction_(timeout, transaction_id_);
return err;
}
uint32_t transaction_id() const { return transaction_id_; }
bool is_active() const { return transaction_id_ != 0; }
private:
// delete copy constructor and assignment operator
TransactionGuard(const TransactionGuard&) = delete;
TransactionGuard& operator=(const TransactionGuard&) = delete;
EInkDisplayHandler& handler_;
uint32_t transaction_id_ = 0;
};

66
main/display/eink_display_handler.h.old Normal file
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@@ -0,0 +1,66 @@
#pragma once
#include "display/display.h"
#include "lvgl.h"
#include "esp_lvgl_port.h"
#include "freertos/semphr.h"
// Refresh mode configuration
#define PARTIAL_REFRESH_THRESHOLD 10 // Full refresh every N partial refreshes
#define DISPLAY_WIDTH 800
#define DISPLAY_HEIGHT 480
#define DISPLAY_BUFFER_SIZE (((DISPLAY_WIDTH * DISPLAY_HEIGHT) / 8) + 8) // 1-bit per pixel + 8-byte palette
class EInkDisplayHandler : public DisplayHandler {
public:
EInkDisplayHandler(EventGroupHandle_t system_event_group);
virtual ~EInkDisplayHandler();
void init();
void start_touch_task();
// Request a full refresh on next flush
void request_full_refresh();
// Check if display is busy (refreshing)
bool is_busy() const;
private:
// LVGL display and input device handles
lv_display_t* _lvgl_display = nullptr;
lv_indev_t* _lvgl_touch_indev = nullptr;
lv_draw_buf_t* _lvgl_draw_buf = nullptr;
// Framebuffer
uint8_t* _framebuffer = nullptr;
bool _framebuffer_in_psram = false;
// Refresh tracking
uint32_t _partial_refresh_count = 0;
bool _force_full_refresh = false;
SemaphoreHandle_t _refresh_mutex = nullptr;
// Touch task
TaskHandle_t _touch_task_handle = nullptr;
// Refresh task and queue
TaskHandle_t _refresh_task_handle = nullptr;
QueueHandle_t _refresh_queue = nullptr;
// LVGL callbacks
static void _lvgl_flush_cb(lv_display_t* disp, const lv_area_t* area, uint8_t* px_map);
static void _lvgl_touch_read_cb(lv_indev_t* indev, lv_indev_data_t* data);
// Display operations
void _perform_full_refresh(const uint8_t* framebuffer);
void _perform_partial_refresh(const uint8_t* framebuffer);
void _wait_for_busy();
// Touch task
static void _touch_task(void* param);
// Refresh task
static void _refresh_task(void* param);
// Helper to convert LVGL 1-bit buffer to e-paper format
void _convert_buffer_to_epaper(const uint8_t* lvgl_buf, uint8_t* epd_buf, size_t size);
};