first pass and mostly working

This commit is contained in:
Morgan 'ARR\!' Allen 2023-12-28 18:14:40 -08:00
commit e14dd1ab28
4 changed files with 221 additions and 0 deletions

7
CMakeLists.txt Normal file
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idf_component_register(SRCS
"main/esp_netif_now.c"
REQUIRES esp_netif esp_wifi
INCLUDE_DIRS "include"
)

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README.md Normal file
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# `esp_netif_now`
An ESP-NETIF driver for ESP-Now
# usage
Installing this on two devices with LwIP debugging turned up and you will see packets being exchanged.
This could also be the basis for using any other system that is capable of using LwIP.
Install with
```
git clone https://git.oit.cloud/morgan/esp_netif_now/ components/esp_netif_now
```
## complete example
```
#include "esp_mac.h"
#include "esp_wifi.h"
#include "nvs_flash.h"
#include "esp_netif_now.h"
void app_main() {
esp_netif_now_config_t config;
esp_efuse_mac_get_default((uint8_t*)&config.mac);
ESP_ERROR_CHECK(nvs_flash_init());
ESP_ERROR_CHECK(esp_netif_init());
ESP_ERROR_CHECK(esp_event_loop_create_default());
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
ESP_ERROR_CHECK(esp_wifi_start());
ESP_ERROR_CHECK(esp_wifi_set_channel(1, WIFI_SECOND_CHAN_NONE));
esp_netif_set_ip4_addr(&config.ip_info.ip, 10, 10 , 0, config.mac[5]);
esp_netif_set_ip4_addr(&config.ip_info.gw, 10, 10 , 0, 1);
esp_netif_set_ip4_addr(&config.ip_info.netmask, 255, 255 , 255, 0);
esp_netif_now_init(&config);
}
```

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include/esp_netif_now.h Normal file
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#ifndef __ESP_NETIF_NOW_H__
#define __ESP_NETIF_NOW_H__
#include "esp_netif.h"
#include "esp_now.h"
typedef struct esp_netif_now_config_t {
uint8_t mac[6];
esp_netif_ip_info_t ip_info;
} esp_netif_now_config_t;
esp_err_t esp_netif_now_init(esp_netif_now_config_t *netif_now_config);
#endif

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main/esp_netif_now.c Normal file
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#include "esp_log.h"
#include "esp_mac.h"
#include "esp_netif.h"
#include "esp_wifi.h"
#include "lwip/netdb.h"
#include "lwip/sockets.h"
#include "lwip/sys.h"
#include "esp_netif_now.h"
#define TAG "esp_netif_now"
static uint8_t broadcast_addr[ESP_NOW_ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
esp_netif_t* netif;
void esp_netif_now_io_free_rx_buffer(void *h, void *buffer);
static esp_err_t esp_netif_now_io_transmit(void *h, void *buffer, size_t len);
static esp_err_t esp_netif_now_io_transmit_wrap(void *h, void *buffer, size_t len, void *netstack_buf);
static esp_err_t esp_netif_now_io_attach(esp_netif_t * esp_netif, void * args);
const esp_netif_driver_ifconfig_t esp_netif_now_ifconfig = {
.driver_free_rx_buffer = esp_netif_now_io_free_rx_buffer,
.transmit = esp_netif_now_io_transmit,
.transmit_wrap = esp_netif_now_io_transmit_wrap,
.handle = "esp-netif-now"
};
const esp_netif_driver_base_t esp_netif_now_driver_base = {
.post_attach = esp_netif_now_io_attach
};
void esp_netif_now_io_free_rx_buffer(void *h, void *buffer) {
// TODO
}
esp_err_t esp_netif_now_add_peer(uint8_t *mac) {
esp_now_peer_info_t *peer = malloc(sizeof(esp_now_peer_info_t));
if (peer == NULL) {
return -1;
}
memset(peer, 0, sizeof(esp_now_peer_info_t));
peer->channel = 1;
peer->ifidx = ESP_IF_WIFI_STA;
memcpy(peer->peer_addr, mac, ESP_NOW_ETH_ALEN);
// check for some conditions
esp_err_t ret = esp_now_add_peer(peer);
free(peer);
return ret;
}
static esp_err_t esp_netif_now_io_transmit(void *h, void *buffer, size_t len) {
uint8_t *buf = buffer;
uint8_t peer[6];
memcpy(&peer, buf, 6);
ESP_LOGI(TAG, "sending %d bytes to: %02X:%02X:%02X:%02X:%02X:%02X", len, peer[0], peer[1], peer[2], peer[3], peer[4], peer[5]);
for(uint8_t i = 0; i < len; i++) {
printf("0x%02X ", buf[i]);
if(i % 16 == 15) printf("\n");
}
printf("\n");
esp_err_t ret = ESP_OK;
ret = esp_now_send(peer, buffer, len);
if(ret == ESP_ERR_ESPNOW_NOT_FOUND) {
ESP_LOGE("esp-netif-now", "ESP-Now peer not found");
} else if(ret == ESP_ERR_ESPNOW_INTERNAL) {
ESP_LOGE("esp-netif-now", "ESP-Now experienced an internal error");
} else if(ret != ESP_OK) {
ESP_ERROR_CHECK(ret);
}
return ret;
}
static esp_err_t esp_netif_now_io_transmit_wrap(void *h, void *buffer, size_t len, void *netstack_buf) {
return esp_netif_now_io_transmit(h, buffer, len);
}
static esp_err_t esp_netif_now_io_attach(esp_netif_t * esp_netif, void * args) {
ESP_ERROR_CHECK(esp_netif_set_driver_config(esp_netif, &esp_netif_now_ifconfig));
return ESP_OK;
}
void * esp_netif_now_new_handler(void) {
return (void*)&esp_netif_now_driver_base;
}
static void esp_netif_now_recv_cb(const esp_now_recv_info_t *recv_info, const uint8_t *data, int len) {
// TODO
// * Handle MAC related, peering, broadcast, etc
// * Pipe received data into LwIP
uint8_t peer[6];
memcpy(&peer, recv_info->src_addr, 6);
ESP_LOGI(TAG, "receiving %d bytes from: %02X:%02X:%02X:%02X:%02X:%02X", len, peer[0], peer[1], peer[2], peer[3], peer[4], peer[5]);
esp_netif_now_add_peer((uint8_t*)&peer);
for(uint8_t i = 0; i < len; i++) {
printf("0x%02X ", data[i]);
if(i % 16 == 15) printf("\n");
}
printf("\n");
esp_netif_receive(netif, (void*)data, len, NULL);
}
static void esp_netif_now_send_cb(const uint8_t *mac_addr, esp_now_send_status_t status) {
// TODO free any memory allocated during io_transmit
}
esp_err_t esp_netif_now_init(esp_netif_now_config_t *netif_now_config) {
esp_netif_inherent_config_t netif_common_config = {
.flags = ESP_NETIF_FLAG_AUTOUP,
.ip_info = &netif_now_config->ip_info,
.if_key = "TEST",
.if_desc = "net_test_if"
};
esp_netif_config_t config = {
.base = &netif_common_config, // use specific behaviour configuration
.stack = ESP_NETIF_NETSTACK_DEFAULT_WIFI_STA, // use default WIFI-like network stack configuration
};
ESP_LOGI(TAG, "esp_now_init()");
ESP_ERROR_CHECK(esp_now_init());
ESP_ERROR_CHECK(esp_now_register_recv_cb(esp_netif_now_recv_cb));
ESP_ERROR_CHECK(esp_now_register_send_cb(esp_netif_now_send_cb));
esp_netif_now_add_peer(broadcast_addr);
// Netif creation and configuration
//
netif = esp_netif_new(&config);
esp_netif_attach(netif, esp_netif_now_new_handler());
// Start the netif in a manual way, no need for events
//
esp_netif_set_mac(netif, netif_now_config->mac);
esp_netif_action_start(netif, NULL, 0, NULL);
return ESP_OK;
}