Feature:ADC

include/ADCconf.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "Arduino.h"
+#include "esp_adc/adc_continuous.h"
+
+class ADC_BME {
+    private:
+        uint32_t _FRAME_SIZE;
+        uint32_t _POOL_SIZE;
+        uint32_t _HZ_ADC;
+        adc_channel_t _channel;
+        uint8_t* _dma_buffer;
+        volatile bool dma_data_ready = false;
+        adc_continuous_handle_t handle_ADC = NULL;
+        static bool IRAM_ATTR adc_dma_callback(adc_continuous_handle_t handle, const adc_continuous_evt_data_t *edata, void *user_data);
+    public:
+        void config(const uint32_t muestras_bloque, adc_channel_t channel, const uint32_t hz_adc, uint8_t* dma_buffer);
+        void setup();
+        uint32_t read(uint16_t* samples_buffer);
+};

src/ADCconf.cpp

@@ -0,0 +1,94 @@
+#include "ADCconf.h"
+
+bool IRAM_ATTR ADC_BME::adc_dma_callback(adc_continuous_handle_t handle, const adc_continuous_evt_data_t *edata, void *user_data){
+    ADC_BME* adc =static_cast<ADC_BME*>(user_data);
+    adc->dma_data_ready = true;
+    return false;
+}
+
+void ADC_BME::config(const uint32_t muestras_bloque, adc_channel_t channel, const uint32_t hz_adc, uint8_t* dma_buffer){
+    _FRAME_SIZE=muestras_bloque*4;
+    _POOL_SIZE=_FRAME_SIZE*4;
+    _channel=channel;
+    _HZ_ADC=hz_adc;
+    _dma_buffer=dma_buffer;
+}
+
+void ADC_BME::setup(){
+    adc_continuous_handle_cfg_t ADC_config = {
+        .max_store_buf_size = _POOL_SIZE,
+        .conv_frame_size = _FRAME_SIZE,
+    };
+    ESP_ERROR_CHECK(adc_continuous_new_handle(&ADC_config, &handle_ADC));
+
+    adc_digi_pattern_config_t channel_config = {0};
+    channel_config.channel = _channel;
+    channel_config.atten = ADC_ATTEN_DB_12;
+    channel_config.bit_width = ADC_BITWIDTH_12;
+    channel_config.unit = ADC_UNIT_1;
+
+    adc_continuous_config_t adc_config = {
+          .pattern_num = 1,
+          .adc_pattern = &channel_config,
+          .sample_freq_hz = _HZ_ADC,
+          .conv_mode = ADC_CONV_SINGLE_UNIT_1,
+    };
+
+    ESP_ERROR_CHECK(adc_continuous_config(handle_ADC, &adc_config));
+
+    adc_continuous_evt_cbs_t cb_config = {
+        .on_conv_done = adc_dma_callback,
+        .on_pool_ovf = NULL
+    };
+
+    ESP_ERROR_CHECK(adc_continuous_register_event_callbacks(handle_ADC, &cb_config, this));
+    ESP_ERROR_CHECK(adc_continuous_start(handle_ADC));
+    Serial.println("DMA Iniciado con sistema de bandera.");
+}
+
+uint32_t ADC_BME::read(uint16_t* samples_buffer) {
+
+    if (!dma_data_ready) {
+        return 0;
+    }
+
+    dma_data_ready = false;
+    uint32_t ret_num = 0;
+
+    // Leer datos DMA
+    esp_err_t ret = adc_continuous_read(handle_ADC,_dma_buffer,_FRAME_SIZE,&ret_num,0);
+
+    if (ret != ESP_OK)
+        return 0;
+
+    // Buffer temporal parseado
+    adc_continuous_data_t parsed_data[_FRAME_SIZE/4];
+
+    uint32_t parsed_count = 0;
+
+    // Parsear datos
+    esp_err_t parse_ret =
+        adc_continuous_parse_data(
+            handle_ADC,
+            _dma_buffer,
+            ret_num,
+            parsed_data,
+            &parsed_count
+        );
+
+    if (parse_ret != ESP_OK) {
+        return 0;
+    }
+
+    uint32_t valid_samples = 0;
+    // Copiar muestras limpias
+    for (uint32_t i = 0; i < parsed_count; i++) {
+        if (!parsed_data[i].valid)
+            continue;
+
+        samples_buffer[valid_samples] = parsed_data[i].raw_data;
+        valid_samples++;
+    }
+
+    return valid_samples;
+}

src/main.cpp

@@ -1,9 +1,19 @@
 #include "Arduino.h"
 #include "freertos/ringbuf.h"
 
-//DEBUG
+#include "ADCconf.h"
-uint8_t i_debug[10] = {0,1,2,3,4,5,6,7,8,9};
+
-const uint16_t SIZE_BUFFER = 1024;
+// API ESP-IDF para ADC modo continuo (uso de DMA)
+#define MS_BLOQUE 10
+adc_channel_t CHANNEL = ADC_CHANNEL_3;
+const uint32_t HZ_ADC = 1000; // Limitado a 611 - 83333 para el ESP32-S3
+const uint32_t MUESTRAS_BLOQUE = (HZ_ADC * MS_BLOQUE) / 1000;
+uint8_t dma_buffer[MUESTRAS_BLOQUE * SOC_ADC_DIGI_RESULT_BYTES] = {0};
+uint16_t samples_buffer[MUESTRAS_BLOQUE] = {0};
+const uint32_t SIZE_BUFFER = MUESTRAS_BLOQUE*10;
+
+ADC_BME adc1_3;
+
 // FreeRTOS
 TaskHandle_t ADCTaskHandle = NULL;
 TaskHandle_t WebSocketTaskHandle = NULL;
@@ -15,6 +25,9 @@ void WebSocketTask(void *parameter);
 void setup(){
     Serial.begin(230400);
 
+    adc1_3.config(MUESTRAS_BLOQUE, CHANNEL, HZ_ADC, dma_buffer);
+    adc1_3.setup();
+
     //Iniciar el buffer circular
     if (bufferHandle == NULL) {
         Serial.printf("Failed to create ring buffer!");
@@ -22,7 +35,7 @@ void setup(){
     }
 
     xTaskCreatePinnedToCore( ADCTask, "ADCTask", 10000, NULL, 1, &ADCTaskHandle, 0);
-    xTaskCreatePinnedToCore( WebSocketTask, "WebSocketTask", 10000, NULL, 1, &WebSocketTaskHandle, 0);
+    xTaskCreatePinnedToCore( WebSocketTask, "WebSocketTask", 10000, NULL, 1, &WebSocketTaskHandle, 1);
 }
 
 void loop(){
@@ -30,9 +43,12 @@ void loop(){
 
 void ADCTask(void *parameter){
     for(;;) {
-        if (xRingbufferSend(bufferHandle, i_debug, sizeof(i_debug), pdMS_TO_TICKS(1000)) != pdTRUE) {
+        uint32_t count = adc1_3.read(samples_buffer);
+        if (count > 0) {
+            if (xRingbufferSend(bufferHandle, samples_buffer, count * sizeof(uint16_t), pdMS_TO_TICKS(1000)) != pdTRUE) {
                 Serial.println("Failed to send message to ring buffer!");
             }
+        }
         vTaskDelay(pdMS_TO_TICKS(10));
     }
 }
@@ -40,12 +56,13 @@ void ADCTask(void *parameter){
 void WebSocketTask(void *parameter){
     for(;;) {
         size_t receivedMessageSize;
-        uint8_t* receivedMessage = (uint8_t*)xRingbufferReceive(bufferHandle, &receivedMessageSize, pdMS_TO_TICKS(1000));
+        uint16_t* receivedMessage = (uint16_t*)xRingbufferReceive(bufferHandle, &receivedMessageSize, pdMS_TO_TICKS(1000));
 
         // 6. Check if the receive operation was successful
         if (receivedMessage != NULL) {
-            for(size_t i = 0; i < receivedMessageSize; i++) {
+            size_t samples = receivedMessageSize / sizeof(uint16_t);
-                Serial.printf("%d ", receivedMessage[i]);}
+            for(size_t i = 0; i < samples; i++) {
+                Serial.printf("%u ", receivedMessage[i]);}
             Serial.println();
             vRingbufferReturnItem(bufferHandle, (void*)receivedMessage);
         } else {