Restructured into modules and classes.

main/Page.cpp

@@ -0,0 +1,4 @@
+#include "Page.h"
+
+Page::Page()
+{}

main/Page.h

@@ -0,0 +1,16 @@
+#ifndef _PAGE_H_
+#define _PAGE_H_
+#include <stdlib.h>
+
+class Page
+{
+public:
+    Page();
+
+    char* text;
+    size_t len;
+
+private:
+};
+
+#endif

main/PagePrinter.cpp

@@ -0,0 +1,27 @@
+#include "display.h"
+#include "EPD.h"
+#include "PagePrinter.h"
+
+#include "esp_log.h"
+static const char *TAG = "PagePrinter";
+
+int font = DEJAVU18_FONT;//DEFAULT_FONT;
+
+PagePrinter::PagePrinter()
+{}
+
+void PagePrinter::print(Page* page)
+{
+    if (page->text == NULL) {
+        ESP_LOGE(TAG, "Page text is NULL");
+        return;
+    }
+    if (page->len == 0) {
+        return;
+    }
+    EPD_setFont(font, NULL);
+    text_wrap = 1;
+    EPD_print(page->text, 0, 0);
+    EPD_UpdateScreen();
+
+}

main/PagePrinter.h

@@ -0,0 +1,11 @@
+#include "Page.h"
+
+class PagePrinter
+{
+public:
+    PagePrinter();
+
+    void print(Page* page);
+
+private:
+};

main/TextReader.cpp

@@ -0,0 +1,34 @@
+#include "TextReader.h"
+
+#include "esp_log.h"
+static const char *TAG = "TextReader";
+
+TextReader::TextReader(FILE* file)
+{
+    this->f = file;
+}
+
+void TextReader::close()
+{
+    fclose(this->f);
+}
+
+size_t TextReader::read(long pos, char* text, size_t len)
+{
+    if (this->f == NULL) {
+        ESP_LOGE(TAG, "File not opened.");
+        sprintf(text, "File could not be opened.");
+        return 0;
+    } else {
+        fseek(this->f, pos, SEEK_SET);
+        size_t read = fread(text, 1, len, this->f);
+        if (read > 0) {
+            ESP_LOGI(TAG, "Read content: %s", text);
+        } else {
+            ESP_LOGI(TAG, "End of file. Closing.");
+            fclose(this->f);
+            this->f = NULL;
+        }
+        return read;
+    }
+}

main/TextReader.h

@@ -0,0 +1,16 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+class TextReader
+{
+public:
+    TextReader(FILE* file);
+
+    size_t read(long pos, char* text, size_t len);
+
+    void close();
+    
+private:
+    
+    FILE* f;
+};

main/TextStorage.cpp

@@ -0,0 +1,25 @@
+#include "TextStorage.h"
+
+#include "esp_log.h"
+static const char *TAG = "TextStorage";
+
+TextStorage::TextStorage()
+{}
+
+TextReader* TextStorage::open(char* filename)
+{
+    FILE* f = fopen("/sdcard/book.txt", "r");
+    if (f == NULL) {
+        ESP_LOGE(TAG, "File could not be opened");
+        return NULL;
+    }
+    ESP_LOGI(TAG, "File opened for reading.");
+    return new TextReader(f);
+}
+
+void TextStorage::close(TextReader* reader)
+{
+    reader->close();
+    delete reader;
+    ESP_LOGI(TAG, "File closed.");
+}

main/TextStorage.h

@@ -0,0 +1,10 @@
+#include "TextReader.h"
+
+class TextStorage
+{
+public:
+    TextStorage();
+
+    TextReader* open(char* filename);
+    void close(TextReader* reader);
+};

main/Typesetter.cpp

@@ -0,0 +1,10 @@
+#include "Typesetter.h"
+
+Typesetter::Typesetter()
+{}
+
+void Typesetter::preparePage(Page* page, char* text, size_t len)
+{
+    page->text = text;
+    page->len = len;
+}

main/Typesetter.h

@@ -0,0 +1,13 @@
+#include <stdlib.h>
+#include "Page.h"
+
+class Typesetter
+{
+public:
+    Typesetter();
+
+    void preparePage(Page* page, char* text, size_t len);
+
+//private:
+
+};

main/buttons.c

@@ -0,0 +1,27 @@
+
+#include <stdlib.h>
+#include "driver/gpio.h"
+#include "buttons.h"
+
+#define BTN_PIN_PLUS ((gpio_num_t)39)
+#define BTN_PIN_OK ((gpio_num_t)37)
+#define BTN_PIN_MINUS ((gpio_num_t)38)
+
+void buttons_init()
+{
+    gpio_config_t buttons_config;
+    buttons_config.intr_type = (gpio_int_type_t)GPIO_PIN_INTR_DISABLE;
+    buttons_config.mode = GPIO_MODE_INPUT;
+    buttons_config.pull_up_en = (gpio_pullup_t)1;
+    buttons_config.pull_down_en = (gpio_pulldown_t)0;
+    buttons_config.pin_bit_mask = (1LL << BTN_PIN_MINUS);
+    gpio_config(&buttons_config);
+    buttons_config.pin_bit_mask = (1LL << BTN_PIN_OK);
+    gpio_config(&buttons_config);
+    buttons_config.pin_bit_mask = (1LL << BTN_PIN_PLUS);
+    gpio_config(&buttons_config);
+}
+
+bool buttons_pressed_ok() { return gpio_get_level(BTN_PIN_OK) == 0; }
+bool buttons_pressed_plus() { return gpio_get_level(BTN_PIN_PLUS) == 0; }
+bool buttons_pressed_minus() { return gpio_get_level(BTN_PIN_MINUS) == 0; }

main/buttons.h

@@ -0,0 +1,4 @@
+void buttons_init();
+bool buttons_pressed_ok();
+bool buttons_pressed_plus();
+bool buttons_pressed_minus();

main/config.h

@@ -0,0 +1,2 @@
+
+#define APP_VERSION "0.1"

main/display.c

@@ -0,0 +1,102 @@
+
+#include "spi_master_lobo.h"
+#include "EPD.h"
+#include <stdlib.h>
+#include "esp_system.h"
+#include "driver/gpio.h"
+#include "esp_system.h"
+#include "esp_heap_alloc_caps.h"
+#include "esp_log.h"
+#include "config.h"
+#include "display.h"
+
+void display_init()
+{
+	disp_buffer = (uint8_t*)pvPortMallocCaps(EPD_DISPLAY_WIDTH * (EPD_DISPLAY_HEIGHT/8), MALLOC_CAP_DMA);
+	assert(disp_buffer);
+	drawBuff = disp_buffer;
+
+	gs_disp_buffer = (uint8_t*)pvPortMallocCaps(EPD_DISPLAY_WIDTH * EPD_DISPLAY_HEIGHT, MALLOC_CAP_DMA);
+	assert(gs_disp_buffer);
+	gs_drawBuff = gs_disp_buffer;
+}
+
+
+spi_lobo_device_interface_config_t devcfg;
+spi_lobo_bus_config_t buscfg;
+void spi_init()
+{
+    gpio_set_direction(DC_Pin, GPIO_MODE_OUTPUT);
+	gpio_set_level(DC_Pin, 1);
+	gpio_set_direction(RST_Pin, GPIO_MODE_OUTPUT);
+	gpio_set_level(RST_Pin, 0);
+	gpio_set_direction(BUSY_Pin, GPIO_MODE_INPUT);
+    gpio_set_pull_mode(BUSY_Pin, GPIO_PULLUP_ONLY);
+
+#ifdef POWER_Pin
+	gpio_set_direction(POWER_Pin, GPIO_MODE_OUTPUT);
+	gpio_set_level(POWER_Pin, 1);
+#endif
+
+    buscfg.miso_io_num = -1;    			// set SPI MISO pin
+    buscfg.mosi_io_num = MOSI_Pin;  		// set SPI MOSI pin
+    buscfg.sclk_io_num = SCK_Pin;			// set SPI CLK pin
+    buscfg.quadwp_io_num=-1;
+    buscfg.quadhd_io_num=-1;
+	buscfg.max_transfer_sz = 5*1024;		// max transfer size is 4736 bytes
+
+    devcfg.clock_speed_hz=40000000;		// SPI clock is 40 MHz
+    devcfg.mode=0;						// SPI mode 0
+    devcfg.spics_io_num=-1;				// we will use external CS pin
+	devcfg.spics_ext_io_num = CS_Pin;		// external CS pin
+	devcfg.flags=SPI_DEVICE_HALFDUPLEX;	// ALWAYS SET  to HALF DUPLEX MODE for display spi !!
+}
+
+void display_connect()
+{
+    int ret;
+    
+    ret=spi_lobo_bus_add_device(SPI_BUS, &buscfg, &devcfg, &disp_spi);
+    assert(ret==ESP_OK);
+	printf("SPI: display device added to spi bus\r\n");
+
+	ret = spi_lobo_device_select(disp_spi, 1);
+    assert(ret==ESP_OK);
+	ret = spi_lobo_device_deselect(disp_spi);
+    assert(ret==ESP_OK);
+
+    printf("SPI: attached display device, speed=%u\r\n", spi_lobo_get_speed(disp_spi));
+	printf("SPI: bus uses native pins: %s\r\n", spi_lobo_uses_native_pins(disp_spi) ? "true" : "false");
+
+    //EPD_PowerOn();
+}
+
+void display_splash_screen()
+{
+    EPD_DisplayClearPart();
+    EPD_fillScreen(0);
+    EPD_UpdateScreen();
+
+    EPD_setFont(COMIC24_FONT, NULL);
+    EPD_print("LilyBook", 30, 30);
+    EPD_setFont(DEFAULT_FONT, NULL);
+    EPD_print("Version:", 30, 70);
+    EPD_print(APP_VERSION, 100, 70);
+    EPD_UpdateScreen();
+}
+
+void display_clear()
+{
+    EPD_fillScreen(_bg);
+}
+
+void display_refresh()
+{
+    EPD_DisplayClearPart();
+    EPD_fillScreen(_bg);
+}
+
+void display_update()
+{
+    EPD_UpdateScreen();
+}

main/display.h

@@ -0,0 +1,8 @@
+void display_init();
+void spi_init();
+void display_connect();
+void display_splash_screen();
+
+void display_clear();
+void display_refresh();
+void display_update();

main/main.cpp

@@ -1,7 +1,6 @@
 #include <time.h>
 #include <errno.h>
 #include <sys/fcntl.h>
-#include <stdio.h>
 #include <time.h>
 #include <stdlib.h>
 #include <string.h>
@@ -11,21 +10,21 @@
 #include "driver/gpio.h"
 #include "esp_system.h"
 #include "esp_heap_alloc_caps.h"
-#include "spiffs_vfs.h"
+
 #include "esp_log.h"
-#include "spi_master_lobo.h"
-#include "img_hacking.c"
-#include "EPD.h"
-#include "storage.h"
-
-#define APP_VERSION "0.1"
-
-#define BTN_PIN_PLUS ((gpio_num_t)39)
-#define BTN_PIN_OK ((gpio_num_t)37)
-#define BTN_PIN_MINUS ((gpio_num_t)38)
-
 static const char *TAG = "main";
 
+extern "C" {
+#include "config.h"
+#include "buttons.h"
+#include "storage.h"
+#include "display.h"
+}
+
+#include "Typesetter.h"
+#include "TextStorage.h"
+#include "PagePrinter.h"
+
 static struct tm* tm_info;
 static char tmp_buff[128];
 static time_t time_now, time_last = 0;
@@ -33,172 +32,64 @@ static const char *file_fonts[3] = {"/spiffs/fonts/DotMatrix_M.fon", "/spiffs/fo
 static const char tag[] = "[LilyBook]";
 esp_err_t ret;
 
-void display_init()
+void sleep(unsigned int ms)
 {
-	disp_buffer = (uint8_t*)pvPortMallocCaps(EPD_DISPLAY_WIDTH * (EPD_DISPLAY_HEIGHT/8), MALLOC_CAP_DMA);
-	assert(disp_buffer);
-	drawBuff = disp_buffer;
-
-	gs_disp_buffer = (uint8_t*)pvPortMallocCaps(EPD_DISPLAY_WIDTH * EPD_DISPLAY_HEIGHT, MALLOC_CAP_DMA);
-	assert(gs_disp_buffer);
-	gs_drawBuff = gs_disp_buffer;
-}
-
-
-spi_lobo_device_interface_config_t devcfg;
-spi_lobo_bus_config_t buscfg;
-void spi_init()
-{
-    gpio_set_direction(DC_Pin, GPIO_MODE_OUTPUT);
-	gpio_set_level(DC_Pin, 1);
-	gpio_set_direction(RST_Pin, GPIO_MODE_OUTPUT);
-	gpio_set_level(RST_Pin, 0);
-	gpio_set_direction(BUSY_Pin, GPIO_MODE_INPUT);
-    gpio_set_pull_mode(BUSY_Pin, GPIO_PULLUP_ONLY);
-
-#ifdef POWER_Pin
-	gpio_set_direction(POWER_Pin, GPIO_MODE_OUTPUT);
-	gpio_set_level(POWER_Pin, 1);
-#endif
-
-    buscfg.miso_io_num = -1;    			// set SPI MISO pin
-    buscfg.mosi_io_num = MOSI_Pin;  		// set SPI MOSI pin
-    buscfg.sclk_io_num = SCK_Pin;			// set SPI CLK pin
-    buscfg.quadwp_io_num=-1;
-    buscfg.quadhd_io_num=-1;
-	buscfg.max_transfer_sz = 5*1024;		// max transfer size is 4736 bytes
-
-    devcfg.clock_speed_hz=40000000;		// SPI clock is 40 MHz
-    devcfg.mode=0;						// SPI mode 0
-    devcfg.spics_io_num=-1;				// we will use external CS pin
-	devcfg.spics_ext_io_num = CS_Pin;		// external CS pin
-	devcfg.flags=SPI_DEVICE_HALFDUPLEX;	// ALWAYS SET  to HALF DUPLEX MODE for display spi !!
-}
-
-void display_connect()
-{
-    ret=spi_lobo_bus_add_device(SPI_BUS, &buscfg, &devcfg, &disp_spi);
-    assert(ret==ESP_OK);
-	printf("SPI: display device added to spi bus\r\n");
-
-	ret = spi_lobo_device_select(disp_spi, 1);
-    assert(ret==ESP_OK);
-	ret = spi_lobo_device_deselect(disp_spi);
-    assert(ret==ESP_OK);
-
-    printf("SPI: attached display device, speed=%u\r\n", spi_lobo_get_speed(disp_spi));
-	printf("SPI: bus uses native pins: %s\r\n", spi_lobo_uses_native_pins(disp_spi) ? "true" : "false");
-
-    //EPD_PowerOn();
-}
-
-void fs_init()
-{
-    vfs_spiffs_register();
-    if (spiffs_is_mounted) {
-        ESP_LOGI(tag, "File system mounted.");
-    } else {
-        ESP_LOGE(tag, "Error mounting file system.");
-    }
-
-    if (storage_init() == 0) {
-        ESP_LOGI(tag, "SD card mounted.");
-    } else {
-        ESP_LOGE(tag, "Error mounting SD card.");
-    }
+    vTaskDelay(ms / portTICK_RATE_MS);
 }
 
 extern "C" void app_main()
 {
-    gpio_config_t buttons_config;
-    buttons_config.intr_type = (gpio_int_type_t)GPIO_PIN_INTR_DISABLE;
-    buttons_config.mode = GPIO_MODE_INPUT;
-    buttons_config.pull_up_en = (gpio_pullup_t)1;
-    buttons_config.pull_down_en = (gpio_pulldown_t)0;
-    buttons_config.pin_bit_mask = (1LL << BTN_PIN_MINUS);
-    gpio_config(&buttons_config);
-    buttons_config.pin_bit_mask = (1LL << BTN_PIN_OK);
-    gpio_config(&buttons_config);
-    buttons_config.pin_bit_mask = (1LL << BTN_PIN_PLUS);
-    gpio_config(&buttons_config);
+    printf("\n   LilyBook v%s\n\n", APP_VERSION);
 
+    storage_init();
+    buttons_init();
     display_init();
     spi_init();
 
-	vTaskDelay(500 / portTICK_RATE_MS);
-
-    printf("\n   LilyBook v%s\n\n", APP_VERSION);
+	sleep(500);
 
 	display_connect();
+    display_splash_screen();
 
-    EPD_DisplayClearPart();
-    EPD_fillScreen(0);
-    EPD_UpdateScreen();
-
-    EPD_setFont(COMIC24_FONT, NULL);
-    EPD_print("LilyBook", 30, 30);
-    EPD_setFont(DEFAULT_FONT, NULL);
-    EPD_print("Version:", 30, 70);
-    EPD_print(APP_VERSION, 100, 70);
-    EPD_UpdateScreen();
-
-    EPD_wait(500);
-
-    fs_init();
+    sleep(500);
 
 	printf("==== START ====\r\n\n");
 
-	_gs = 1;
-	uint32_t tstart;
-	int pass = 0;
-    int font = DEJAVU18_FONT;//DEFAULT_FONT;
-    EPD_setFont(font, NULL);
+    Typesetter typesetter;
+    PagePrinter pagePrinter;
+    TextStorage textStorage;
+    TextReader* textReader = textStorage.open("/sdcard/book.txt");
+    Page page;
 
-    EPD_wait(100);
-
-    FILE* f = fopen("/sdcard/book.txt", "r");
+    long bookmark = 0;
 
     while (1) {
-		EPD_fillScreen(_bg);
-		_fg = 15;
-		_bg = 0;
-
 		char text[1024];
-        
-        if (f == NULL) {
-            ESP_LOGE(TAG, "Failed to open file for reading");
-            sprintf(text, "Could not open SD card.");
-            f = fopen("/sdcard/book.txt", "r");
+        if (textReader != NULL) {
+            size_t read = textReader->read(bookmark, text, sizeof(text));
         } else {
-            if (fread(text, 1, sizeof(text), f) > 0) {
-                ESP_LOGI(TAG, "Read content: %s", text);
-            } else {
-                ESP_LOGI(TAG, "End of file. Closing.");
-                fclose(f);
-                f = NULL;
+            strcpy(text, "File could not be opened.");
         }
-        }
-
-        text_wrap = 1;
-        EPD_print(text, 0, 0);
-        EPD_UpdateScreen();
+        typesetter.preparePage(&page, text, sizeof(text));
+        display_clear();
+        pagePrinter.print(&page);
+        display_update();
 
         while (1) {
-            EPD_wait(100);
-            if (gpio_get_level(BTN_PIN_OK) == 0) {
+            sleep(10);
+            if (buttons_pressed_ok()) {
                 ESP_LOGI(TAG, "Clear page.");
-                EPD_DisplayClearPart();
-                EPD_fillScreen(_bg);
-                EPD_print(text, 10, 10);
-                EPD_UpdateScreen();
-            }
-            if (gpio_get_level(BTN_PIN_PLUS) == 0) {
-                ESP_LOGI(TAG, "Turn page PLUS.");
+                display_refresh();
                 break;
             }
-            if (gpio_get_level(BTN_PIN_MINUS) == 0) {
+            if (buttons_pressed_plus()) {
+                ESP_LOGI(TAG, "Turn page PLUS.");
+                bookmark += sizeof(text);
+                break;
+            }
+            if (buttons_pressed_minus()) {
                 ESP_LOGI(TAG, "Turn page MINUS.");
-                fseek(f, 2 * sizeof(text), SEEK_CUR);
+                bookmark -= sizeof(text);
                 break;
             }
         }

main/storage.c

@@ -9,9 +9,10 @@
 #include "driver/sdmmc_host.h"
 #include "driver/sdspi_host.h"
 #include "sdmmc_cmd.h"
+#include "spiffs_vfs.h"
 #include "storage.h"
 
-static const char *TAG = "storage";
+static const char *tag = "storage";
 
 // This example can use SDMMC and SPI peripherals to communicate with SD card.
 // By default, SDMMC peripheral is used.
@@ -33,10 +34,10 @@ static const char *TAG = "storage";
 #define PIN_NUM_CS   ((gpio_num_t)13)
 #endif //USE_SPI_MODE
 
-int storage_init()
+int sdcard_init()
 {
 #ifndef USE_SPI_MODE
-    ESP_LOGI(TAG, "Using SDMMC peripheral");
+    ESP_LOGI(tag, "Using SDMMC peripheral");
     sdmmc_host_t host = SDMMC_HOST_DEFAULT();
 
     // This initializes the slot without card detect (CD) and write protect (WP) signals.
@@ -86,10 +87,10 @@ int storage_init()
 
     if (ret != ESP_OK) {
         if (ret == ESP_FAIL) {
-            ESP_LOGE(TAG, "Failed to mount filesystem. "
+            ESP_LOGE(tag, "Failed to mount filesystem. "
                 "If you want the card to be formatted, set format_if_mount_failed = true.");
         } else {
-            ESP_LOGE(TAG, "Failed to initialize the card (%s). "
+            ESP_LOGE(tag, "Failed to initialize the card (%s). "
                 "Make sure SD card lines have pull-up resistors in place.", esp_err_to_name(ret));
         }
         return -1;
@@ -100,3 +101,25 @@ int storage_init()
 
     return 0;
 }
+
+int storage_init()
+{
+    int ret = 0;
+
+    vfs_spiffs_register();
+    if (spiffs_is_mounted) {
+        ESP_LOGI(tag, "File system mounted.");
+    } else {
+        ESP_LOGE(tag, "Error mounting file system.");
+        ret += 1 << 1;
+    }
+
+    if (sdcard_init() == 0) {
+        ESP_LOGI(tag, "SD card mounted.");
+    } else {
+        ESP_LOGE(tag, "Error mounting SD card.");
+        ret += 1 << 2;
+    }
+    
+    return ret;
+}