Add Gitea OTA firmware update, dual-slot partition layout, and Gitea Actions release workflow

components/rc522/src/rc522_helpers.c

@@ -0,0 +1,65 @@
+#include <esp_system.h>
+#include <esp_log.h>
+#include <esp_check.h>
+#include <string.h>
+#include <sys/time.h>
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+
+#include "rc522_types_internal.h"
+#include "rc522_helpers_internal.h"
+
+#include <esp_timer.h>
+
+RC522_LOG_DEFINE_BASE();
+
+uint32_t rc522_millis()
+{
+    return (uint32_t)(esp_timer_get_time() / 1000ULL);
+}
+
+void rc522_delay_ms(uint32_t ms)
+{
+    TickType_t ticks = pdMS_TO_TICKS(ms);
+    if (ticks == 0 && ms > 0) {
+        ticks = 1;
+    }
+    vTaskDelay(ticks);
+}
+
+esp_err_t rc522_buffer_to_hex_str(
+    const uint8_t *buffer, uint8_t buffer_length, char *str_buffer, uint8_t str_buffer_length)
+{
+    RC522_CHECK(buffer == NULL);
+    RC522_CHECK(buffer_length < 1);
+    RC522_CHECK(str_buffer == NULL);
+
+    const char *format = "%02" RC522_X " ";
+    const uint8_t formatted_length = 3;
+
+    RC522_CHECK(str_buffer_length < (buffer_length * formatted_length));
+
+    uint16_t len = 0;
+    for (uint16_t i = 0; i < buffer_length; i++) {
+        len += sprintf(str_buffer + len, format, buffer[i]);
+    }
+
+    str_buffer[len - 1] = 0x00;
+
+    return ESP_OK;
+}
+
+inline esp_err_t rc522_nibbles(uint8_t byte, uint8_t *msb, uint8_t *lsb)
+{
+    RC522_CHECK(msb == NULL && lsb == NULL);
+
+    if (msb) {
+        *msb = byte >> 4;
+    }
+
+    if (lsb) {
+        *lsb = byte & 0x0F;
+    }
+
+    return ESP_OK;
+}