Make the component compatible with IDFv4.1, v4.2, v4.3

components/esp_modem/private_include/uart_compat.h

@@ -0,0 +1,35 @@
+// Copyright 2021 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 "esp_log.h"
+#include "driver/uart.h"
+
+#ifndef _UART_COMPAT_H_
+#define _UART_COMPAT_H_
+
+/**
+ * @brief This is a compatible header, which just takes care of different data ptr type
+ * across different IDF version in driver/uart
+ */
+static inline int uart_write_bytes_compat(uart_port_t uart_num, const void* src, size_t size)
+{
+#if ESP_IDF_VERSION_MAJOR >= 4 && ESP_IDF_VERSION_MINOR >= 3
+    const void *data = src;
+#else
+    auto *data = reinterpret_cast<const char*>(src);
+#endif
+    return uart_write_bytes(uart_num, data, size);
+}
+
+#endif //_UART_COMPAT_H_