esp-idf/examples/build_system/cmake/import_lib/main/main.cpp

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#include <stdio.h>
#include <string.h>
#include <sys/unistd.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include "esp_err.h"
#include "esp_log.h"
#include "esp_vfs_fat.h"
#include "lib/tinyxml2/tinyxml2.h"
using namespace tinyxml2;
static const char *TAG = "example";
// Handle of the wear levelling library instance
static wl_handle_t s_wl_handle = WL_INVALID_HANDLE;
// Mount path for the partition
const char *base_path = "/spiflash";
extern "C" void app_main(void)
{
// Do example setup
ESP_LOGI(TAG, "Setting up...");
esp_vfs_fat_mount_config_t mount_config;
mount_config.max_files = 4;
mount_config.format_if_mount_failed = true;
mount_config.allocation_unit_size = CONFIG_WL_SECTOR_SIZE;
esp_err_t err = esp_vfs_fat_spiflash_mount_rw_wl(base_path, "storage", &mount_config, &s_wl_handle);
if (err != ESP_OK) {
ESP_LOGE(TAG, "Failed to mount FATFS (%s)", esp_err_to_name(err));
return;
}
// The sample XML is embedded binary data. Create a file first containing the embedded
// so it can be accessed.
ESP_LOGI(TAG, "Copying sample XML to filesystem...");
extern const char data_start[] asm("_binary_sample_xml_start");
extern const char data_end[] asm("_binary_sample_xml_end");
FILE *f = fopen("/spiflash/sample.xml", "wb");
if (f == NULL) {
ESP_LOGE(TAG, "Failed to open file for writing");
return;
}
fwrite(data_start, sizeof(char), data_end - data_start + 1, f);
fclose(f);
// Now that the file is created, load it using tinyxml2 and parse
ESP_LOGI(TAG, "Reading XML file");
XMLDocument data;
data.LoadFile("/spiflash/sample.xml");
XMLPrinter printer;
data.Print(&printer);
ESP_LOGI(TAG, "Read XML data:\n%s", printer.CStr());
const char* to_data = data.FirstChildElement("note")->FirstChildElement("to")->GetText();
const char* from_data = data.FirstChildElement("note")->FirstChildElement("from")->GetText();
const char* heading_data = data.FirstChildElement("note")->FirstChildElement("heading")->GetText();
const char* body_data = data.FirstChildElement("note")->FirstChildElement("body")->GetText();
ESP_LOGI(TAG, "Parsed XML data:\n\nTo: %s\nFrom: %s\nHeading: %s\nBody: %s",
to_data, from_data, heading_data, body_data);
ESP_LOGI(TAG, "Example end");
}