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feat(firmware): add MFRC522 driver implementation and configuration

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This commit is contained in:
Timothy Yin
2025-11-24 11:40:57 +08:00
parent c0c32cb9a7
commit a54bd62491
6 changed files with 315 additions and 65 deletions
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175
hardware/firmware/src/main.cpp Normal file
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#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "lwip/err.h"
#include "lwip/sys.h"
#include <mongoose.h>
#include <MicroOcpp_c.h>
#include <MicroOcppMongooseClient_c.h>
#include <SmartLeds.h>
#include "mfrc522.h"
#include "config.h"
/* FreeRTOS event group to signal when we are connected*/
static EventGroupHandle_t s_wifi_event_group;
/* The event group allows multiple bits for each event, but we only care about two events:
* - we are connected to the AP with an IP
* - we failed to connect after the maximum amount of retries */
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1
#define LED_PIN 17
#define NUM_LEDS 1
SmartLed leds(LED_WS2812B, NUM_LEDS, LED_PIN, 0, DoubleBuffer);
static const char *TAG = "wifi station";
static int s_retry_num = 0;
static void event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data)
{
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START)
{
esp_wifi_connect();
}
else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED)
{
if (s_retry_num < CFG_WIFI_MAXIMUM_RETRY)
{
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
}
else
{
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGI(TAG, "connect to the AP fail");
}
else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP)
{
ip_event_got_ip_t *event = (ip_event_got_ip_t *)event_data;
ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
s_retry_num = 0;
xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
}
}
void wifi_init_sta(void)
{
s_wifi_event_group = xEventGroupCreate();
ESP_ERROR_CHECK(esp_netif_init());
ESP_ERROR_CHECK(esp_event_loop_create_default());
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 instance_any_id;
esp_event_handler_instance_t instance_got_ip;
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, &instance_any_id));
ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, &instance_got_ip));
/* Initialize wifi_config in a C++-friendly way (designated initializers are C-only) */
wifi_config_t wifi_config;
memset(&wifi_config, 0, sizeof(wifi_config));
strncpy((char *)wifi_config.sta.ssid, CFG_WIFI_SSID, sizeof(wifi_config.sta.ssid) - 1);
strncpy((char *)wifi_config.sta.password, CFG_WIFI_PASS, sizeof(wifi_config.sta.password) - 1);
/* Setting a password implies station will connect to all security modes including WEP/WPA.
* However these modes are deprecated and not advisable to be used. Incase your Access point
* doesn't support WPA2, these mode can be enabled by changing the authmode below. */
wifi_config.sta.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_LOGI(TAG, "wifi_init_sta finished.");
/* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
* number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group, WIFI_CONNECTED_BIT | WIFI_FAIL_BIT, pdFALSE, pdFALSE, portMAX_DELAY);
/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
* happened. */
if (bits & WIFI_CONNECTED_BIT)
{
ESP_LOGI(TAG, "connected to ap SSID:%s password:%s", CFG_WIFI_SSID, CFG_WIFI_PASS);
}
else if (bits & WIFI_FAIL_BIT)
{
ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s", CFG_WIFI_SSID, CFG_WIFI_PASS);
}
else
{
ESP_LOGE(TAG, "UNEXPECTED EVENT");
}
/* The event will not be processed after unregister */
ESP_ERROR_CHECK(esp_event_handler_instance_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));
ESP_ERROR_CHECK(esp_event_handler_instance_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id));
vEventGroupDelete(s_wifi_event_group);
}
uint8_t hue;
void showGradient()
{
hue++;
for (int i = 0; i != NUM_LEDS; i++)
leds[i] = Hsv{static_cast<uint8_t>(hue + 30 * i), 255, 255};
leds.show();
}
extern "C" void app_main(void)
{
// Initialize NVS
esp_err_t ret = nvs_flash_init();
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND)
{
ESP_ERROR_CHECK(nvs_flash_erase());
ret = nvs_flash_init();
}
ESP_ERROR_CHECK(ret);
ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
wifi_init_sta();
/* Initialize Mongoose (necessary for MicroOcpp)*/
struct mg_mgr mgr; // Event manager
mg_mgr_init(&mgr); // Initialise event manager
mg_log_set(MG_LL_DEBUG); // Set log level
/* Initialize MicroOcpp */
struct OCPP_FilesystemOpt fsopt = {.use = true, .mount = true, .formatFsOnFail = true};
OCPP_Connection *osock = ocpp_makeConnection(&mgr, CFG_OCPP_BACKEND, CFG_CP_IDENTIFIER, CFG_AUTHORIZATIONKEY, "", fsopt);
ocpp_initialize(osock, CFG_CP_MODAL, CFG_CP_VENDOR, fsopt, false);
/* Enter infinite loop */
while (1)
{
mg_mgr_poll(&mgr, 10);
ocpp_loop();
showGradient();
}
/* Deallocate ressources */
ocpp_deinitialize();
ocpp_deinitConnection(osock);
mg_mgr_free(&mgr);
return;
}