318 lines
11 KiB
C
318 lines
11 KiB
C
/* OTA example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "esp_system.h"
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#include "esp_wifi.h"
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#include "esp_event_loop.h"
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#include "esp_log.h"
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#include "esp_ota_ops.h"
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#include "esp_partition.h"
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#include "nvs_flash.h"
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#include "lwip/err.h"
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#include "lwip/sockets.h"
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#include "lwip/sys.h"
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#include "lwip/netdb.h"
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#include "lwip/dns.h"
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#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID
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#define EXAMPLE_WIFI_PASS CONFIG_WIFI_PASSWORD
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#define EXAMPLE_SERVER_IP CONFIG_SERVER_IP
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#define EXAMPLE_SERVER_PORT CONFIG_SERVER_PORT
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#define EXAMPLE_FILENAME CONFIG_EXAMPLE_FILENAME
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#define BUFFSIZE 1024
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#define TEXT_BUFFSIZE 1024
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static const char *TAG = "ota";
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/*an ota data write buffer ready to write to the flash*/
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char ota_write_data[BUFFSIZE + 1] = { 0 };
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/*an packet receive buffer*/
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char text[BUFFSIZE + 1] = { 0 };
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/* an image total length*/
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int binary_file_length = 0;
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/*socket id*/
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int socket_id = -1;
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char http_request[64] = {0};
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/* operate handle : uninitialized value is zero ,every ota begin would exponential growth*/
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esp_ota_handle_t out_handle = 0;
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esp_partition_t operate_partition;
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/* FreeRTOS event group to signal when we are connected & ready to make a request */
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static EventGroupHandle_t wifi_event_group;
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/* The event group allows multiple bits for each event,
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but we only care about one event - are we connected
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to the AP with an IP? */
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const int CONNECTED_BIT = BIT0;
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static esp_err_t event_handler(void *ctx, system_event_t *event)
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{
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switch (event->event_id) {
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case SYSTEM_EVENT_STA_START:
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esp_wifi_connect();
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break;
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case SYSTEM_EVENT_STA_GOT_IP:
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xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
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break;
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case SYSTEM_EVENT_STA_DISCONNECTED:
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/* This is a workaround as ESP32 WiFi libs don't currently
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auto-reassociate. */
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esp_wifi_connect();
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xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
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break;
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default:
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break;
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}
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return ESP_OK;
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}
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static void initialise_wifi(void)
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{
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tcpip_adapter_init();
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wifi_event_group = xEventGroupCreate();
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ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) );
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
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ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = EXAMPLE_WIFI_SSID,
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.password = EXAMPLE_WIFI_PASS,
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},
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};
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ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
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ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
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ESP_ERROR_CHECK( esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) );
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ESP_ERROR_CHECK( esp_wifi_start() );
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}
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/*read buffer by byte still delim ,return read bytes counts*/
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int read_until(char *buffer, char delim, int len)
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{
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// /*TODO: delim check,buffer check,further: do an buffer length limited*/
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int i = 0;
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while (buffer[i] != delim && i < len) {
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++i;
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}
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return i + 1;
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}
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/* resolve a packet from http socket
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* return true if packet including \r\n\r\n that means http packet header finished,start to receive packet body
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* otherwise return false
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* */
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bool resolve_pkg(char text[], int total_len, esp_ota_handle_t out_handle)
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{
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/* i means current position */
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int i = 0, i_read_len = 0;
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while (text[i] != 0 && i < total_len) {
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i_read_len = read_until(&text[i], '\n', total_len);
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// if we resolve \r\n line,we think packet header is finished
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if (i_read_len == 2) {
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int i_write_len = total_len - (i + 2);
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memset(ota_write_data, 0, BUFFSIZE);
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/*copy first http packet body to write buffer*/
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memcpy(ota_write_data, &(text[i + 2]), i_write_len);
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/*check write packet header first byte:0xE9 second byte:0x09 */
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if (ota_write_data[0] == 0xE9 && i_write_len >= 2 && ota_write_data[1] == 0x09) {
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ESP_LOGI(TAG, "OTA Write Header format Check OK. first byte is %02x ,second byte is %02x", ota_write_data[0], ota_write_data[1]);
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} else {
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ESP_LOGE(TAG, "OTA Write Header format Check Failed! first byte is %02x ,second byte is %02x", ota_write_data[0], ota_write_data[1]);
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return false;
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}
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esp_err_t err = esp_ota_write( out_handle, (const void *)ota_write_data, i_write_len);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "Error: esp_ota_write failed! err=%x", err);
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return false;
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} else {
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ESP_LOGI(TAG, "esp_ota_write header OK");
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binary_file_length += i_write_len;
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}
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return true;
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}
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i += i_read_len;
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}
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return false;
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}
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bool connect_to_http_server()
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{
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ESP_LOGI(TAG, "Server IP: %s Server Port:%s", EXAMPLE_SERVER_IP, EXAMPLE_SERVER_PORT);
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sprintf(http_request, "GET %s HTTP/1.1\r\nHost: %s:%s \r\n\r\n", EXAMPLE_FILENAME, EXAMPLE_SERVER_IP, EXAMPLE_SERVER_PORT);
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int http_connect_flag = -1;
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struct sockaddr_in sock_info;
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socket_id = socket(AF_INET, SOCK_STREAM, 0);
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if (socket_id == -1) {
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ESP_LOGE(TAG, "Create socket failed!");
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return false;
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}
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// set connect info
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memset(&sock_info, 0, sizeof(struct sockaddr_in));
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sock_info.sin_family = AF_INET;
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sock_info.sin_addr.s_addr = inet_addr(EXAMPLE_SERVER_IP);
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sock_info.sin_port = htons(atoi(EXAMPLE_SERVER_PORT));
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// connect to http server
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http_connect_flag = connect(socket_id, (struct sockaddr *)&sock_info, sizeof(sock_info));
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if (http_connect_flag == -1) {
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ESP_LOGE(TAG, "Connect to server failed! errno=%d", errno);
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close(socket_id);
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return false;
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} else {
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ESP_LOGI(TAG, "Connected to server");
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return true;
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}
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return false;
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}
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bool ota_init()
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{
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esp_err_t err;
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const esp_partition_t *esp_current_partition = esp_ota_get_boot_partition();
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if (esp_current_partition->type != ESP_PARTITION_TYPE_APP) {
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ESP_LOGE(TAG, "Error： esp_current_partition->type != ESP_PARTITION_TYPE_APP");
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return false;
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}
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esp_partition_t find_partition;
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memset(&operate_partition, 0, sizeof(esp_partition_t));
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/*choose which OTA image should we write to*/
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switch (esp_current_partition->subtype) {
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case ESP_PARTITION_SUBTYPE_APP_FACTORY:
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find_partition.subtype = ESP_PARTITION_SUBTYPE_APP_OTA_0;
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break;
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case ESP_PARTITION_SUBTYPE_APP_OTA_0:
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find_partition.subtype = ESP_PARTITION_SUBTYPE_APP_OTA_1;
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break;
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case ESP_PARTITION_SUBTYPE_APP_OTA_1:
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find_partition.subtype = ESP_PARTITION_SUBTYPE_APP_OTA_0;
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break;
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default:
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break;
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}
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find_partition.type = ESP_PARTITION_TYPE_APP;
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const esp_partition_t *partition = esp_partition_find_first(find_partition.type, find_partition.subtype, NULL);
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assert(partition != NULL);
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memset(&operate_partition, 0, sizeof(esp_partition_t));
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err = esp_ota_begin( partition, OTA_SIZE_UNKNOWN, &out_handle);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "esp_ota_begin failed err=0x%x!", err);
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return false;
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} else {
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memcpy(&operate_partition, partition, sizeof(esp_partition_t));
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ESP_LOGI(TAG, "esp_ota_begin init OK");
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return true;
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}
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return false;
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}
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void __attribute__((noreturn)) task_fatal_error()
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{
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ESP_LOGE(TAG, "Exiting task due to fatal error...");
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close(socket_id);
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(void)vTaskDelete(NULL);
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}
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void main_task(void *pvParameter)
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{
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esp_err_t err;
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ESP_LOGI(TAG, "Starting OTA example...");
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/* Wait for the callback to set the CONNECTED_BIT in the
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event group.
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*/
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xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
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false, true, portMAX_DELAY);
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ESP_LOGI(TAG, "Connect to Wifi ! Start to Connect to Server....");
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/*connect to http server*/
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if (connect_to_http_server()) {
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ESP_LOGI(TAG, "Connected to http server");
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} else {
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ESP_LOGE(TAG, "Connect to http server failed!");
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task_fatal_error();
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}
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int res = -1;
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/*send GET request to http server*/
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res = send(socket_id, http_request, strlen(http_request), 0);
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if (res == -1) {
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ESP_LOGE(TAG, "Send GET request to server failed");
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task_fatal_error();
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} else {
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ESP_LOGI(TAG, "Send GET request to server succeeded");
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}
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if ( ota_init() ) {
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ESP_LOGI(TAG, "OTA Init succeeded");
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} else {
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ESP_LOGE(TAG, "OTA Init failed");
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task_fatal_error();
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}
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bool pkg_body_start = false, flag = true;
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/*deal with all receive packet*/
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while (flag) {
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memset(text, 0, TEXT_BUFFSIZE);
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memset(ota_write_data, 0, BUFFSIZE);
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int buff_len = recv(socket_id, text, TEXT_BUFFSIZE, 0);
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if (buff_len < 0) { /*receive error*/
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ESP_LOGE(TAG, "Error: receive data error! errno=%d", errno);
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task_fatal_error();
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} else if (buff_len > 0 && !pkg_body_start) { /*deal with packet header*/
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memcpy(ota_write_data, text, buff_len);
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pkg_body_start = resolve_pkg(text, buff_len, out_handle);
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} else if (buff_len > 0 && pkg_body_start) { /*deal with packet body*/
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memcpy(ota_write_data, text, buff_len);
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err = esp_ota_write( out_handle, (const void *)ota_write_data, buff_len);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "Error: esp_ota_write failed! err=%x", err);
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task_fatal_error();
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}
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binary_file_length += buff_len;
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ESP_LOGI(TAG, "Have written image length %d", binary_file_length);
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} else if (buff_len == 0) { /*packet over*/
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flag = false;
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ESP_LOGI(TAG, "Connection closed, all packets received");
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close(socket_id);
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} else {
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ESP_LOGE(TAG, "Unexpected recv result");
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}
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}
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ESP_LOGI(TAG, "Total Write binary data length : %d", binary_file_length);
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if (esp_ota_end(out_handle) != ESP_OK) {
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ESP_LOGE(TAG, "esp_ota_end failed!");
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task_fatal_error();
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}
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err = esp_ota_set_boot_partition(&operate_partition);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "esp_ota_set_boot_partition failed! err=0x%x", err);
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task_fatal_error();
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}
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ESP_LOGI(TAG, "Prepare to restart system!");
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esp_restart();
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return ;
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}
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void app_main()
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{
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nvs_flash_init();
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initialise_wifi();
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xTaskCreate(&main_task, "main_task", 8192, NULL, 5, NULL);
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}
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