feat(esp8266): Modify ESP8266 system API to be same as esp-idf

components/esp8266/source/system_api.c

@@ -0,0 +1,66 @@
+// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <string.h>
+#include "esp_libc.h"
+#include "esp_attr.h"
+#include "esp_system.h"
+#include "FreeRTOS.h"
+
+/**
+ * Get IDF version
+ */
+const char* esp_get_idf_version(void)
+{
+    return IDF_VER;
+}
+
+/**
+ * @brief Fill an esp_chip_info_t structure with information about the ESP8266 chip
+ */
+static void get_chip_info_esp8266(esp_chip_info_t* out_info)
+{
+    memset(out_info, 0, sizeof(*out_info));
+    
+    out_info->model = CHIP_ESP8266;
+    out_info->revision = 1;
+    out_info->cores = 1;
+    out_info->features = CHIP_FEATURE_WIFI_BGN;
+}
+
+/**
+ * @brief Fill an esp_chip_info_t structure with information about the chip
+ */
+void esp_chip_info(esp_chip_info_t* out_info)
+{
+    // Only ESP8266 is supported now, in the future call one of the
+    // chip-specific functions based on sdkconfig choice
+    return get_chip_info_esp8266(out_info);
+}
+
+/**
+  * @brief  Get the size of available heap.
+  */
+uint32_t esp_get_free_heap_size(void)
+{
+    return xPortGetFreeHeapSize();
+}
+
+/**
+  * @brief Get the minimum heap that has ever been available
+  */
+uint32_t esp_get_minimum_free_heap_size(void)
+{
+    return xPortGetMinimumEverFreeHeapSize();
+}