In Visual Studio Code
ESP32 S3 Mini-1 chip revision: v0.1 ESP-IDF v5.0.1
After i2s_example_init_std();
[if set I2S_MCLK_MULTIPLE_192 and I2S_Sample_Freq_Hz 96000Hz]
Server don't read /hello page in web browser.
For I2S_MCLK_MULTIPLE_384 and I2S_Sample_Freq_Hz 48000Hz all works ok.
Why?
The multiple of mclk to sample rate I2S_MCLK_MULTIPLE_192 is a not accepted value for ESP32 S3?
Any advice?
- /* Simple HTTP Server Example
- This example code is in the Public Domain (or CC0 licensed, at your option.)
- Unless required by applicable law or agreed to in writing, this
- software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
- CONDITIONS OF ANY KIND, either express or implied.
- */
- #include <esp_wifi.h>
- #include <esp_event.h>
- #include <esp_log.h>
- #include <esp_system.h>
- #include <nvs_flash.h>
- #include <sys/param.h>
- #include "nvs_flash.h"
- #include "esp_netif.h"
- #include "esp_eth.h"
- #include "protocol_examples_common.h"
- #include "esp_tls_crypto.h"
- #include <esp_http_server.h>
- #include "driver/i2c.h"
- #include "driver/i2s_common.h"
- #include "driver/i2s_std.h"
- #define I2S_MCLK_MULTIPLE_192 192
- #define I2S_Sample_Freq_Hz 96000
- #define I2S_Sample_Samples_DMA_FRAME_NUM 1020
- #define I2S_Sample_Samples_DMA_DESC_NUM 4
- #define I2S_Sample_Samples_Buffor_Len 3*(I2S_Sample_Samples_DMA_FRAME_NUM+(I2S_Sample_Samples_DMA_FRAME_NUM/3))
- #define EXAMPLE_STD_MCLK_IO1 GPIO_NUM_36
- #define EXAMPLE_STD_BCLK_IO1 GPIO_NUM_34 // I2S bit clock io number
- #define EXAMPLE_STD_WS_IO1 GPIO_NUM_33 // I2S word select io number
- #define EXAMPLE_STD_DOUT_IO1 GPIO_NUM_35 // I2S data out io number
- #define EXAMPLE_STD_DIN_IO1 GPIO_NUM_19 // I2S data in io number
- static i2s_chan_handle_t tx_chan; // I2S tx channel handler
- /* A simple example that demonstrates how to create GET and POST
- * handlers for the web server.
- */
- static const char *TAG = "example";
- #if CONFIG_EXAMPLE_BASIC_AUTH
- typedef struct {
- char *username;
- char *password;
- } basic_auth_info_t;
- #define HTTPD_401 "401 UNAUTHORIZED" /*!< HTTP Response 401 */
- static char *http_auth_basic(const char *username, const char *password)
- {
- int out;
- char *user_info = NULL;
- char *digest = NULL;
- size_t n = 0;
- asprintf(&user_info, "%s:%s", username, password);
- if (!user_info) {
- ESP_LOGE(TAG, "No enough memory for user information");
- return NULL;
- }
- esp_crypto_base64_encode(NULL, 0, &n, (const unsigned char *)user_info, strlen(user_info));
- /* 6: The length of the "Basic " string
- * n: Number of bytes for a base64 encode format
- * 1: Number of bytes for a reserved which be used to fill zero
- */
- digest = calloc(1, 6 + n + 1);
- if (digest) {
- strcpy(digest, "Basic ");
- esp_crypto_base64_encode((unsigned char *)digest + 6, n, (size_t *)&out, (const unsigned char *)user_info, strlen(user_info));
- }
- free(user_info);
- return digest;
- }
- /* An HTTP GET handler */
- static esp_err_t basic_auth_get_handler(httpd_req_t *req)
- {
- char *buf = NULL;
- size_t buf_len = 0;
- basic_auth_info_t *basic_auth_info = req->user_ctx;
- buf_len = httpd_req_get_hdr_value_len(req, "Authorization") + 1;
- if (buf_len > 1) {
- buf = calloc(1, buf_len);
- if (!buf) {
- ESP_LOGE(TAG, "No enough memory for basic authorization");
- return ESP_ERR_NO_MEM;
- }
- if (httpd_req_get_hdr_value_str(req, "Authorization", buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found header => Authorization: %s", buf);
- } else {
- ESP_LOGE(TAG, "No auth value received");
- }
- char *auth_credentials = http_auth_basic(basic_auth_info->username, basic_auth_info->password);
- if (!auth_credentials) {
- ESP_LOGE(TAG, "No enough memory for basic authorization credentials");
- free(buf);
- return ESP_ERR_NO_MEM;
- }
- if (strncmp(auth_credentials, buf, buf_len)) {
- ESP_LOGE(TAG, "Not authenticated");
- httpd_resp_set_status(req, HTTPD_401);
- httpd_resp_set_type(req, "application/json");
- httpd_resp_set_hdr(req, "Connection", "keep-alive");
- httpd_resp_set_hdr(req, "WWW-Authenticate", "Basic realm=\"Hello\"");
- httpd_resp_send(req, NULL, 0);
- } else {
- ESP_LOGI(TAG, "Authenticated!");
- char *basic_auth_resp = NULL;
- httpd_resp_set_status(req, HTTPD_200);
- httpd_resp_set_type(req, "application/json");
- httpd_resp_set_hdr(req, "Connection", "keep-alive");
- asprintf(&basic_auth_resp, "{\"authenticated\": true,\"user\": \"%s\"}", basic_auth_info->username);
- if (!basic_auth_resp) {
- ESP_LOGE(TAG, "No enough memory for basic authorization response");
- free(auth_credentials);
- free(buf);
- return ESP_ERR_NO_MEM;
- }
- httpd_resp_send(req, basic_auth_resp, strlen(basic_auth_resp));
- free(basic_auth_resp);
- }
- free(auth_credentials);
- free(buf);
- } else {
- ESP_LOGE(TAG, "No auth header received");
- httpd_resp_set_status(req, HTTPD_401);
- httpd_resp_set_type(req, "application/json");
- httpd_resp_set_hdr(req, "Connection", "keep-alive");
- httpd_resp_set_hdr(req, "WWW-Authenticate", "Basic realm=\"Hello\"");
- httpd_resp_send(req, NULL, 0);
- }
- return ESP_OK;
- }
- static httpd_uri_t basic_auth = {
- .uri = "/basic_auth",
- .method = HTTP_GET,
- .handler = basic_auth_get_handler,
- };
- static void httpd_register_basic_auth(httpd_handle_t server)
- {
- basic_auth_info_t *basic_auth_info = calloc(1, sizeof(basic_auth_info_t));
- if (basic_auth_info) {
- basic_auth_info->username = CONFIG_EXAMPLE_BASIC_AUTH_USERNAME;
- basic_auth_info->password = CONFIG_EXAMPLE_BASIC_AUTH_PASSWORD;
- basic_auth.user_ctx = basic_auth_info;
- httpd_register_uri_handler(server, &basic_auth);
- }
- }
- #endif
- /* An HTTP GET handler */
- static esp_err_t hello_get_handler(httpd_req_t *req)
- {
- char* buf;
- size_t buf_len;
- /* Get header value string length and allocate memory for length + 1,
- * extra byte for null termination */
- buf_len = httpd_req_get_hdr_value_len(req, "Host") + 1;
- if (buf_len > 1) {
- buf = malloc(buf_len);
- /* Copy null terminated value string into buffer */
- if (httpd_req_get_hdr_value_str(req, "Host", buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found header => Host: %s", buf);
- }
- free(buf);
- }
- buf_len = httpd_req_get_hdr_value_len(req, "Test-Header-2") + 1;
- if (buf_len > 1) {
- buf = malloc(buf_len);
- if (httpd_req_get_hdr_value_str(req, "Test-Header-2", buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found header => Test-Header-2: %s", buf);
- }
- free(buf);
- }
- buf_len = httpd_req_get_hdr_value_len(req, "Test-Header-1") + 1;
- if (buf_len > 1) {
- buf = malloc(buf_len);
- if (httpd_req_get_hdr_value_str(req, "Test-Header-1", buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found header => Test-Header-1: %s", buf);
- }
- free(buf);
- }
- /* Read URL query string length and allocate memory for length + 1,
- * extra byte for null termination */
- buf_len = httpd_req_get_url_query_len(req) + 1;
- if (buf_len > 1) {
- buf = malloc(buf_len);
- if (httpd_req_get_url_query_str(req, buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found URL query => %s", buf);
- char param[32];
- /* Get value of expected key from query string */
- if (httpd_query_key_value(buf, "query1", param, sizeof(param)) == ESP_OK) {
- ESP_LOGI(TAG, "Found URL query parameter => query1=%s", param);
- }
- if (httpd_query_key_value(buf, "query3", param, sizeof(param)) == ESP_OK) {
- ESP_LOGI(TAG, "Found URL query parameter => query3=%s", param);
- }
- if (httpd_query_key_value(buf, "query2", param, sizeof(param)) == ESP_OK) {
- ESP_LOGI(TAG, "Found URL query parameter => query2=%s", param);
- }
- }
- free(buf);
- }
- /* Set some custom headers */
- httpd_resp_set_hdr(req, "Custom-Header-1", "Custom-Value-1");
- httpd_resp_set_hdr(req, "Custom-Header-2", "Custom-Value-2");
- /* Send response with custom headers and body set as the
- * string passed in user context*/
- const char* resp_str = (const char*) req->user_ctx;
- httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
- /* After sending the HTTP response the old HTTP request
- * headers are lost. Check if HTTP request headers can be read now. */
- if (httpd_req_get_hdr_value_len(req, "Host") == 0) {
- ESP_LOGI(TAG, "Request headers lost");
- }
- return ESP_OK;
- }
- static const httpd_uri_t hello = {
- .uri = "/hello",
- .method = HTTP_GET,
- .handler = hello_get_handler,
- /* Let's pass response string in user
- * context to demonstrate it's usage */
- .user_ctx = "Hello World!"
- };
- /* An HTTP POST handler */
- static esp_err_t echo_post_handler(httpd_req_t *req)
- {
- char buf[100];
- int ret, remaining = req->content_len;
- while (remaining > 0) {
- /* Read the data for the request */
- if ((ret = httpd_req_recv(req, buf,
- MIN(remaining, sizeof(buf)))) <= 0) {
- if (ret == HTTPD_SOCK_ERR_TIMEOUT) {
- /* Retry receiving if timeout occurred */
- continue;
- }
- return ESP_FAIL;
- }
- /* Send back the same data */
- httpd_resp_send_chunk(req, buf, ret);
- remaining -= ret;
- /* Log data received */
- ESP_LOGI(TAG, "=========== RECEIVED DATA ==========");
- ESP_LOGI(TAG, "%.*s", ret, buf);
- ESP_LOGI(TAG, "====================================");
- }
- // End response
- httpd_resp_send_chunk(req, NULL, 0);
- return ESP_OK;
- }
- static const httpd_uri_t echo = {
- .uri = "/echo",
- .method = HTTP_POST,
- .handler = echo_post_handler,
- .user_ctx = NULL
- };
- /* This handler allows the custom error handling functionality to be
- * tested from client side. For that, when a PUT request 0 is sent to
- * URI /ctrl, the /hello and /echo URIs are unregistered and following
- * custom error handler http_404_error_handler() is registered.
- * Afterwards, when /hello or /echo is requested, this custom error
- * handler is invoked which, after sending an error message to client,
- * either closes the underlying socket (when requested URI is /echo)
- * or keeps it open (when requested URI is /hello). This allows the
- * client to infer if the custom error handler is functioning as expected
- * by observing the socket state.
- */
- esp_err_t http_404_error_handler(httpd_req_t *req, httpd_err_code_t err)
- {
- if (strcmp("/hello", req->uri) == 0) {
- httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "/hello URI is not available");
- /* Return ESP_OK to keep underlying socket open */
- return ESP_OK;
- } else if (strcmp("/echo", req->uri) == 0) {
- httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "/echo URI is not available");
- /* Return ESP_FAIL to close underlying socket */
- return ESP_FAIL;
- }
- /* For any other URI send 404 and close socket */
- httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "Some 404 error message");
- return ESP_FAIL;
- }
- /* An HTTP PUT handler. This demonstrates realtime
- * registration and deregistration of URI handlers
- */
- static esp_err_t ctrl_put_handler(httpd_req_t *req)
- {
- char buf;
- int ret;
- if ((ret = httpd_req_recv(req, &buf, 1)) <= 0) {
- if (ret == HTTPD_SOCK_ERR_TIMEOUT) {
- httpd_resp_send_408(req);
- }
- return ESP_FAIL;
- }
- if (buf == '0') {
- /* URI handlers can be unregistered using the uri string */
- ESP_LOGI(TAG, "Unregistering /hello and /echo URIs");
- httpd_unregister_uri(req->handle, "/hello");
- httpd_unregister_uri(req->handle, "/echo");
- /* Register the custom error handler */
- httpd_register_err_handler(req->handle, HTTPD_404_NOT_FOUND, http_404_error_handler);
- }
- else {
- ESP_LOGI(TAG, "Registering /hello and /echo URIs");
- httpd_register_uri_handler(req->handle, &hello);
- httpd_register_uri_handler(req->handle, &echo);
- /* Unregister custom error handler */
- httpd_register_err_handler(req->handle, HTTPD_404_NOT_FOUND, NULL);
- }
- /* Respond with empty body */
- httpd_resp_send(req, NULL, 0);
- return ESP_OK;
- }
- static const httpd_uri_t ctrl = {
- .uri = "/ctrl",
- .method = HTTP_PUT,
- .handler = ctrl_put_handler,
- .user_ctx = NULL
- };
- static httpd_handle_t start_webserver(void)
- {
- httpd_handle_t server = NULL;
- httpd_config_t config = HTTPD_DEFAULT_CONFIG();
- config.lru_purge_enable = true;
- // Start the httpd server
- ESP_LOGI(TAG, "Starting server on port: '%d'", config.server_port);
- if (httpd_start(&server, &config) == ESP_OK) {
- // Set URI handlers
- ESP_LOGI(TAG, "Registering URI handlers");
- httpd_register_uri_handler(server, &hello);
- httpd_register_uri_handler(server, &echo);
- httpd_register_uri_handler(server, &ctrl);
- #if CONFIG_EXAMPLE_BASIC_AUTH
- httpd_register_basic_auth(server);
- #endif
- return server;
- }
- ESP_LOGI(TAG, "Error starting server!");
- return NULL;
- }
- static esp_err_t stop_webserver(httpd_handle_t server)
- {
- // Stop the httpd server
- return httpd_stop(server);
- }
- static void disconnect_handler(void* arg, esp_event_base_t event_base,
- int32_t event_id, void* event_data)
- {
- httpd_handle_t* server = (httpd_handle_t*) arg;
- if (*server) {
- ESP_LOGI(TAG, "Stopping webserver");
- if (stop_webserver(*server) == ESP_OK) {
- *server = NULL;
- } else {
- ESP_LOGE(TAG, "Failed to stop http server");
- }
- }
- }
- static void connect_handler(void* arg, esp_event_base_t event_base,
- int32_t event_id, void* event_data)
- {
- httpd_handle_t* server = (httpd_handle_t*) arg;
- if (*server == NULL) {
- ESP_LOGI(TAG, "Starting webserver");
- *server = start_webserver();
- }
- }
- void i2s_example_init_std(void)
- {
- // Setp 1: Determine the I2S channel configuration and allocate both channels
- // The default configuration can be generated by the helper macro,
- // it only requires the I2S controller id and I2S role
- i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_1, I2S_ROLE_MASTER);
- chan_cfg.dma_desc_num = I2S_Sample_Samples_DMA_DESC_NUM;
- chan_cfg.dma_frame_num = I2S_Sample_Samples_DMA_FRAME_NUM;
- ESP_ERROR_CHECK(i2s_new_channel(&chan_cfg, &tx_chan, NULL));
- // Step 2: Setting the configurations of standard mode, and initialize rx & tx channels
- // The slot configuration and clock configuration can be generated by the macros
- // These two helper macros is defined in 'i2s_std.h' which can only be used in STD mode.
- // They can help to specify the slot and clock configurations for initialization or re-configuring
- i2s_std_config_t std_cfg = {
- .clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(I2S_Sample_Freq_Hz),
- .clk_cfg.mclk_multiple = I2S_MCLK_MULTIPLE_192,
- .clk_cfg.clk_src = I2S_CLK_SRC_PLL_160M,
- .slot_cfg = I2S_STD_PHILIPS_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_24BIT, I2S_SLOT_MODE_MONO),
- .slot_cfg.slot_mask=I2S_STD_SLOT_LEFT,
- .gpio_cfg = {
- .mclk = EXAMPLE_STD_MCLK_IO1, // some codecs may require mclk signal, this example doesn't need it
- .bclk = EXAMPLE_STD_BCLK_IO1,
- .ws = EXAMPLE_STD_WS_IO1,
- .dout = EXAMPLE_STD_DOUT_IO1,
- .din = I2S_GPIO_UNUSED, // In duplex mode, bind output and input to a same gpio can loopback internally
- .invert_flags = {
- .mclk_inv = false,
- .bclk_inv = false,
- .ws_inv = false,
- },
- },
- };
- // Initialize the channels
- ESP_ERROR_CHECK(i2s_channel_init_std_mode(tx_chan, &std_cfg));
- }
- void app_main(void)
- {
- static httpd_handle_t server = NULL;
- ESP_ERROR_CHECK(nvs_flash_init());
- ESP_ERROR_CHECK(esp_netif_init());
- ESP_ERROR_CHECK(esp_event_loop_create_default());
- /* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
- * Read "Establishing Wi-Fi or Ethernet Connection" section in
- * examples/protocols/README.md for more information about this function.
- */
- ESP_ERROR_CHECK(example_connect());
- /* Register event handlers to stop the server when Wi-Fi or Ethernet is disconnected,
- * and re-start it upon connection.
- */
- #ifdef CONFIG_EXAMPLE_CONNECT_WIFI
- ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &connect_handler, &server));
- ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_STA_DISCONNECTED, &disconnect_handler, &server));
- #endif // CONFIG_EXAMPLE_CONNECT_WIFI
- #ifdef CONFIG_EXAMPLE_CONNECT_ETHERNET
- ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_ETH_GOT_IP, &connect_handler, &server));
- ESP_ERROR_CHECK(esp_event_handler_register(ETH_EVENT, ETHERNET_EVENT_DISCONNECTED, &disconnect_handler, &server));
- #endif // CONFIG_EXAMPLE_CONNECT_ETHERNET
- /* Start the server for the first time */
- server = start_webserver();
- i2s_example_init_std();
- }
