基于 WEMOS-lolin32-lite 的录音设备。

[firshme]

Code https://github.com/uk0/esp_32_wemos_lolin_lite_inmp441

Code: [Select all] [Expand/Collapse]

1.  
2. #include <WiFi.h>
3. #include <SPIFFS.h>
4. #include <ArduinoWebsockets.h>
5. #include "driver/i2s.h"
6.  
7.  
8. #define I2S_WS_RX  27
9. #define I2S_SCK_RX 14
10. #define I2S_SD_RX  12
11. /**
12. #define I2S_WS_RX  27
13. #define I2S_SCK_RX 14
14. #define I2S_SD_RX  12
15. #define I2S_WS_RX  15
16. #define I2S_SCK_RX 2
17. #define I2S_SD_RX  13
18. */
19.  
20. #define I2S_PORT I2S_NUM_1
21. #define I2S_SAMPLE_RATE   (16000)
22. #define I2S_SAMPLE_BITS   (32)
23. #define I2S_READ_LEN      (1024 * 4)
24. #define I2S_CHANNEL_NUM   (1)
25.  
26.  
27. const char* ssid = "@PHICOMM_3E";
28. const char* password = "asdasd110";
29.  
30. const char* websockets_server_host = "192.168.2.40";
31. const uint16_t websockets_server_port = 10086;
32.  
33. TaskHandle_t i2sADCHandler = NULL;
34.  
35. using namespace websockets;
36. WebsocketsClient client;
37.  
38. const i2s_config_t i2s_config_rx = {
39.   .mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX),
40.   .sample_rate = I2S_SAMPLE_RATE,
41.   .bits_per_sample = i2s_bits_per_sample_t(I2S_SAMPLE_BITS),
42.   .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
43.   .communication_format = i2s_comm_format_t(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB),
44.     .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
45.     .dma_buf_count = 64,
46.     .dma_buf_len = 64
47. };
48.  
49. const i2s_pin_config_t pin_config_rx = {
50.   .bck_io_num = I2S_SCK_RX,
51.   .ws_io_num = I2S_WS_RX,
52.   .data_out_num = I2S_PIN_NO_CHANGE,
53.   .data_in_num = I2S_SD_RX
54. };
55.  
56. void setup() {
57.  
58.    WiFi.mode(WIFI_STA);
59.    WiFi.disconnect();
60.    Serial.begin(115200);
61.    Serial.setDebugOutput(true);
62.    start_to_connect();
63. }
64.  
65. void start_to_connect(){
66.   Serial.println("===================================================================");
67.   WiFi.begin(ssid, password);
68.   while (WiFi.status() != WL_CONNECTED) {
69.     delay(2000);
70.     Serial.print(".");
71.   }
72.   Serial.println("");
73.  
74.   Serial.println("WiFi connected");
75.   Serial.println("IP address: ");
76.   Serial.println(WiFi.localIP());;
77.  
78.   client.onEvent(onEventsCallback);
79.   while(!client.connect(websockets_server_host, websockets_server_port, "/")){
80.     delay(100);
81.     Serial.print(".");
82.   }
83.  
84.   Serial.println("Socket Connected!");
85. }
86.  
87. void i2s_adc_data_scale(uint8_t * d_buff, uint8_t* s_buff, uint32_t len)
88. {
89.     uint32_t j = 0;
90.     uint32_t dac_value = 0;
91.     for (int i = 0; i < len; i += 2) {
92.         dac_value = ((((uint16_t) (s_buff[i + 1] & 0xf) << 8) | ((s_buff[i + 0]))));
93.         d_buff[j++] = 0;
94.         d_buff[j++] = dac_value * 256 / 2048 ;
95.     }
96. }
97.  
98. static void i2s_adc_task(void *arg)
99. {
100.     i2s_driver_install(I2S_NUM_1, &i2s_config_rx, 0, NULL);
101.     i2s_set_pin(I2S_NUM_1, &pin_config_rx);
102.  
103.     int i2s_read_len = I2S_READ_LEN;
104.     size_t bytes_read;
105.  
106.     char* i2s_read_buff = (char*) calloc(i2s_read_len, sizeof(char));
107.     uint8_t* flash_write_buff = (uint8_t*) calloc(i2s_read_len, sizeof(char));
108.     Serial.println(" *** Recording Start *** ");
109.     while (1) {
110.         i2s_read(I2S_PORT, (void*) i2s_read_buff, i2s_read_len, &bytes_read, portMAX_DELAY);
111.         i2s_adc_data_scale(flash_write_buff, (uint8_t*)i2s_read_buff, i2s_read_len);
112.         client.sendBinary((const char*)flash_write_buff, i2s_read_len);
113.         Serial.println("");
114.         Serial.print("SendBinary  len = ");
115.         Serial.print(i2s_read_len);
116.         ets_printf("Never Used Stack Size: %u\n", uxTaskGetStackHighWaterMark(NULL));
117.     }
118.  
119.     free(i2s_read_buff);
120.     i2s_read_buff = NULL;
121.     free(flash_write_buff);
122.     flash_write_buff = NULL;
123. }
124.  
125. void loop() {
126.  
127. }
128.  
129. void onEventsCallback(WebsocketsEvent event, String data) {
130.     if(event == WebsocketsEvent::ConnectionOpened) {
131.         Serial.println("Connnection Opened");
132.         xTaskCreate(i2s_adc_task, "i2s_adc_task", 4096, NULL, 1, &i2sADCHandler);
133.     } else if(event == WebsocketsEvent::ConnectionClosed) {
134.         Serial.println("Connnection Closed");
135.         ESP.restart();
136.     }
137. }
138.  
139.  

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以后会添加 热成像 以及 温度 湿度 风速 高度 等 模块，作为采集器，收集大自然信息

[ESP_Gargamel]

感谢分享，看上去这是个分享，所以我打算把这个贴移到：https://www.esp32.com/viewforum.php?f=36。