esp-idf/components/freemodbus/common/esp_modbus_master.c
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C

/* 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 "mbc_master.h" // for master interface define
#include "esp_modbus_master.h" // for public interface defines
#include "esp_modbus_callbacks.h" // for callback functions
// This file implements public API for Modbus master controller.
// These functions are wrappers for interface functions of the controller
static mb_master_interface_t* master_interface_ptr = NULL;
void mbc_master_init_iface(void* handler)
{
master_interface_ptr = (mb_master_interface_t*) handler;
}
/**
* Modbus controller destroy function
*/
esp_err_t mbc_master_destroy(void)
{
esp_err_t error = ESP_OK;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->destroy != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->destroy();
MB_MASTER_CHECK((error == ESP_OK),
error,
"Master destroy failure, error=(0x%x).",
error);
return error;
}
esp_err_t mbc_master_get_cid_info(uint16_t cid, const mb_parameter_descriptor_t** param_info)
{
esp_err_t error = ESP_OK;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->get_cid_info != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->get_cid_info(cid, param_info);
MB_MASTER_CHECK((error == ESP_OK),
error,
"Master get cid info failure, error=(0x%x).",
error);
return error;
}
/**
* Get parameter data for corresponding characteristic
*/
esp_err_t mbc_master_get_parameter(uint16_t cid, char* name, uint8_t* value, uint8_t* type)
{
esp_err_t error = ESP_OK;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->get_parameter != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->get_parameter(cid, name, value, type);
MB_MASTER_CHECK((error == ESP_OK),
error,
"Master get parameter failure, error=(0x%x) (%s).",
error, esp_err_to_name(error));
return error;
}
/**
* Send custom Modbus request defined as mb_param_request_t structure
*/
esp_err_t mbc_master_send_request(mb_param_request_t* request, void* data_ptr)
{
esp_err_t error = ESP_OK;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->send_request != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->send_request(request, data_ptr);
MB_MASTER_CHECK((error == ESP_OK),
error,
"Master send request failure error=(0x%x) (%s).",
error, esp_err_to_name(error));
return ESP_OK;
}
/**
* Set Modbus parameter description table
*/
esp_err_t mbc_master_set_descriptor(const mb_parameter_descriptor_t* descriptor,
const uint16_t num_elements)
{
esp_err_t error = ESP_OK;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->set_descriptor != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->set_descriptor(descriptor, num_elements);
MB_MASTER_CHECK((error == ESP_OK),
error,
"Master set descriptor failure, error=(0x%x) (%s).",
error, esp_err_to_name(error));
return ESP_OK;
}
/**
* Set parameter value for characteristic selected by name and cid
*/
esp_err_t mbc_master_set_parameter(uint16_t cid, char* name, uint8_t* value, uint8_t* type)
{
esp_err_t error = ESP_OK;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->set_parameter != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->set_parameter(cid, name, value, type);
MB_MASTER_CHECK((error == ESP_OK),
error,
"Master set parameter failure, error=(0x%x) (%s).",
error, esp_err_to_name(error));
return ESP_OK;
}
/**
* Setup Modbus controller parameters
*/
esp_err_t mbc_master_setup(void* comm_info)
{
esp_err_t error = ESP_OK;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->setup != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->setup(comm_info);
MB_MASTER_CHECK((error == ESP_OK),
error,
"Master setup failure, error=(0x%x) (%s).",
error, esp_err_to_name(error));
return ESP_OK;
}
/**
* Modbus controller stack start function
*/
esp_err_t mbc_master_start(void)
{
esp_err_t error = ESP_OK;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->start != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->start();
MB_MASTER_CHECK((error == ESP_OK),
error,
"Master start failure, error=(0x%x) (%s).",
error, esp_err_to_name(error));
return ESP_OK;
}
eMBErrorCode eMBMasterRegDiscreteCB(UCHAR * pucRegBuffer, USHORT usAddress,
USHORT usNDiscrete)
{
eMBErrorCode error = MB_ENOERR;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->master_reg_cb_discrete != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->master_reg_cb_discrete(pucRegBuffer, usAddress, usNDiscrete);
return error;
}
eMBErrorCode eMBMasterRegCoilsCB(UCHAR* pucRegBuffer, USHORT usAddress,
USHORT usNCoils, eMBRegisterMode eMode)
{
eMBErrorCode error = MB_ENOERR;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->master_reg_cb_coils != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->master_reg_cb_coils(pucRegBuffer, usAddress,
usNCoils, eMode);
return error;
}
eMBErrorCode eMBMasterRegHoldingCB(UCHAR * pucRegBuffer, USHORT usAddress,
USHORT usNRegs, eMBRegisterMode eMode)
{
eMBErrorCode error = MB_ENOERR;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->master_reg_cb_holding != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->master_reg_cb_holding(pucRegBuffer, usAddress,
usNRegs, eMode);
return error;
}
eMBErrorCode eMBMasterRegInputCB(UCHAR * pucRegBuffer, USHORT usAddress,
USHORT usNRegs)
{
eMBErrorCode error = MB_ENOERR;
MB_MASTER_CHECK((master_interface_ptr != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
MB_MASTER_CHECK((master_interface_ptr->master_reg_cb_input != NULL),
ESP_ERR_INVALID_STATE,
"Master interface is not correctly initialized.");
error = master_interface_ptr->master_reg_cb_input(pucRegBuffer, usAddress, usNRegs);
return error;
}