diff options
Diffstat (limited to 'main')
| -rw-r--r-- | main/CMakeLists.txt | 4 | ||||
| -rw-r--r-- | main/main.c | 89 | ||||
| -rw-r--r-- | main/wifi.c | 97 | ||||
| -rw-r--r-- | main/wifi.h | 6 |
4 files changed, 196 insertions, 0 deletions
diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt new file mode 100644 index 0000000..5f86806 --- /dev/null +++ b/main/CMakeLists.txt @@ -0,0 +1,4 @@ +set(SRC "main.c" "wifi.c") + +idf_component_register(SRCS ${SRC} + INCLUDE_DIRS ".") diff --git a/main/main.c b/main/main.c new file mode 100644 index 0000000..e0f3e05 --- /dev/null +++ b/main/main.c @@ -0,0 +1,89 @@ +#include <freertos/FreeRTOS.h> +#include <freertos/task.h> + +#include <esp_log.h> +#include <esp_event.h> +#include <esp_netif.h> +#include <nvs_flash.h> + +#include <driver/gpio.h> +#include <driver/i2s_std.h> + +#include "wifi.h" + +#define BUFLEN 1024 +#define SAMP_RATE 8000 + +#define I2S_WS GPIO_NUM_4 +#define I2S_SD GPIO_NUM_1 +#define I2S_SCK GPIO_NUM_5 + +static i2s_chan_handle_t chan; + +static void i2s_read_task(void *args) +{ + size_t n; + char *buf = calloc(1, BUFLEN); + + ESP_ERROR_CHECK(i2s_channel_enable(chan)); + + for (;;) { + if (i2s_channel_read(chan, buf, BUFLEN, &n, 1000) == ESP_OK) { + if (n > 0) { + // todo: copy to a separate buffer and send over udp + // esp_mqtt_client_publish(client, "snd", buf, n, 1, 0); + } + } else + printf("Read Task: i2s read failed\n"); + } + + free(buf); + vTaskDelete(NULL); +} + +static inline void i2s_init(void) +{ + i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG( + I2S_NUM_AUTO, + I2S_ROLE_MASTER); + + ESP_ERROR_CHECK(i2s_new_channel(&chan_cfg, NULL, &chan)); + + i2s_std_config_t std_cfg = { + .clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(SAMP_RATE), + .slot_cfg = I2S_STD_PHILIPS_SLOT_DEFAULT_CONFIG( + I2S_DATA_BIT_WIDTH_24BIT, + I2S_SLOT_MODE_MONO), + .gpio_cfg = { + .ws = I2S_WS, + .din = I2S_SD, + .bclk = I2S_SCK, + .dout = I2S_GPIO_UNUSED, + .mclk = I2S_GPIO_UNUSED, + .invert_flags = { + .ws_inv = false, + .bclk_inv = false, + .mclk_inv = false + } + } + }; + + std_cfg.clk_cfg.mclk_multiple = I2S_MCLK_MULTIPLE_384; + + ESP_ERROR_CHECK(i2s_channel_init_std_mode(chan, &std_cfg)); +} + +void app_main(void) +{ + ESP_ERROR_CHECK(nvs_flash_init()); + ESP_ERROR_CHECK(esp_event_loop_create_default()); + + wifi_connect(); + + i2s_init(); + xTaskCreate(i2s_read_task, "i2s_read_task", 4096, NULL, 5, NULL); + + for (;;) + vTaskDelay(500 / portTICK_PERIOD_MS); +} + diff --git a/main/wifi.c b/main/wifi.c new file mode 100644 index 0000000..9489a72 --- /dev/null +++ b/main/wifi.c @@ -0,0 +1,97 @@ +#include <freertos/FreeRTOS.h> +#include <freertos/event_groups.h> +#include <freertos/task.h> + +#include <esp_log.h> +#include <esp_wifi.h> + +#include "wifi.h" + +#define WIFI_MAX_RETRY 5 + +#define WIFI_CONNECTED_BIT BIT0 +#define WIFI_ERROR_BIT BIT1 + +static const char* TAG = "wifi"; + +static int wifi_retry_num = 0; +static EventGroupHandle_t wifi_evt_group; + +static void wifi_evt_handler( + void *arg, + esp_event_base_t eb, + int32_t id, + void *data) +{ + if (eb == WIFI_EVENT && id == WIFI_EVENT_STA_DISCONNECTED) { + if (wifi_retry_num < WIFI_MAX_RETRY) { + esp_wifi_connect(); + wifi_retry_num++; + ESP_LOGI(TAG, "trying to connect to AP..."); + } else { + ESP_LOGE(TAG,"connection to AP failed"); + xEventGroupSetBits(wifi_evt_group, WIFI_ERROR_BIT); + } + } else if (eb == IP_EVENT && id == IP_EVENT_STA_GOT_IP) { + ip_event_got_ip_t* evt = (ip_event_got_ip_t*) data; + ESP_LOGI( + TAG, + "connected to AP with ip:" IPSTR, + IP2STR(&evt->ip_info.ip)); + + wifi_retry_num = 0; + xEventGroupSetBits(wifi_evt_group, WIFI_CONNECTED_BIT); + } +} + +void wifi_connect(void) +{ + ESP_ERROR_CHECK(esp_netif_init()); + + wifi_evt_group = xEventGroupCreate(); + esp_netif_create_default_wifi_sta(); + + wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT(); + ESP_ERROR_CHECK(esp_wifi_init(&cfg)); + + esp_event_handler_instance_t any_id; + ESP_ERROR_CHECK( + esp_event_handler_instance_register( + WIFI_EVENT, + ESP_EVENT_ANY_ID, + &wifi_evt_handler, + NULL, + &any_id)); + + esp_event_handler_instance_t got_ip; + ESP_ERROR_CHECK( + esp_event_handler_instance_register( + IP_EVENT, + IP_EVENT_STA_GOT_IP, + &wifi_evt_handler, + NULL, + &got_ip)); + + wifi_config_t wifi_config = { + .sta = { + .ssid = CONFIG_WIFI_SSID, + .password = CONFIG_WIFI_PASS, + .threshold.authmode = WIFI_AUTH_WPA2_PSK + }, + }; + + ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA)); + ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config)); + + ESP_ERROR_CHECK(esp_wifi_start()); + ESP_ERROR_CHECK(esp_wifi_connect()); + + xEventGroupWaitBits( + wifi_evt_group, + WIFI_CONNECTED_BIT | WIFI_ERROR_BIT, + pdFALSE, + pdFALSE, + portMAX_DELAY); + + ESP_LOGI(TAG, "wifi station initialized"); +} diff --git a/main/wifi.h b/main/wifi.h new file mode 100644 index 0000000..e526eef --- /dev/null +++ b/main/wifi.h @@ -0,0 +1,6 @@ +#ifndef WIFI_H +#define WIFI_H + +void wifi_connect(void); + +#endif /* WIFI_H */ |