esp-idf/components/freemodbus/common/esp_modbus_slave_serial.c

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/* Copyright 2018 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_err.h" // for esp_err_t
#include "sdkconfig.h" // for KConfig defines
#include "mbc_slave.h" // for slave interface define
#include "esp_modbus_slave.h" // for public slave defines
#include "mbc_serial_slave.h" // for public interface defines
/**
* Initialization of Modbus Serial slave controller
*/
esp_err_t mbc_slave_init(mb_port_type_t port_type, void** handler)
{
void* port_handler = NULL;
esp_err_t error = ESP_ERR_NOT_SUPPORTED;
switch(port_type)
{
case MB_PORT_SERIAL_SLAVE:
// Call constructor function of actual port implementation
error = mbc_serial_slave_create(&port_handler);
break;
default:
return ESP_ERR_NOT_SUPPORTED;
}
if ((port_handler != NULL) && (error == ESP_OK)) {
mbc_slave_init_iface(port_handler);
*handler = port_handler;
}
return error;
}