255 lines
12 KiB
C
255 lines
12 KiB
C
/*
|
|
* ESPRESSIF MIT License
|
|
*
|
|
* Copyright (c) 2018 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
|
|
*
|
|
* Permission is hereby granted for use on all ESPRESSIF SYSTEMS products, in which case,
|
|
* it is free of charge, to any person obtaining a copy of this software and associated
|
|
* documentation files (the "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished
|
|
* to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all copies or
|
|
* substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
// This module allows to hide all Modbus dependencies and work with characteristics
|
|
// instead of Modbus parameters
|
|
#include "stdlib.h"
|
|
#include "string.h" // for memset, memcpy functions
|
|
#include "esp_err.h"
|
|
#include "esp_log.h"
|
|
#include "sense_modbus.h" // for Modbus defines
|
|
|
|
// This module provide an easy way to work with characteristics instead of
|
|
// Modbus parameters
|
|
|
|
static const char* TAG = "SENSE_MB";
|
|
|
|
#define SENSE_MB_CHECK(a, ret_val, str, ...) \
|
|
if (!(a)) { \
|
|
ESP_LOGE(TAG, "%s(%u): " str, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
|
|
return (ret_val); \
|
|
}
|
|
|
|
// Define port options for the master application
|
|
#define MB_BAUDRATE 115200
|
|
#define MB_PORTNUM 2
|
|
#define MB_PARITY UART_PARITY_DISABLE
|
|
|
|
// Keep the pointer to active characteristic table and its size
|
|
static characteristic_descriptor_t** active_cid_table = NULL;
|
|
static uint32_t active_cid_table_size = 0;
|
|
|
|
// The function to get pointer to parameter storage (instance) according to parameter description table
|
|
static void* sense_modbus_get_param_data(const mb_parameter_descriptor_t* param_descriptor)
|
|
{
|
|
assert(param_descriptor != NULL);
|
|
void* instance_ptr = NULL;
|
|
if (param_descriptor->param_offset != 0) {
|
|
switch(param_descriptor->mb_param_type)
|
|
{
|
|
case MB_PARAM_HOLDING:
|
|
instance_ptr = (void*)(&holding_reg_params + param_descriptor->param_offset - 1);
|
|
break;
|
|
case MB_PARAM_INPUT:
|
|
instance_ptr = (void*)(&input_reg_params + param_descriptor->param_offset - 1);
|
|
break;
|
|
case MB_PARAM_COIL:
|
|
instance_ptr = (void*)(&coil_reg_params + param_descriptor->param_offset - 1);
|
|
break;
|
|
case MB_PARAM_DISCRETE:
|
|
instance_ptr = (void*)(&discrete_reg_params + param_descriptor->param_offset - 1);
|
|
break;
|
|
default:
|
|
instance_ptr = NULL;
|
|
break;
|
|
}
|
|
} else {
|
|
instance_ptr = malloc((size_t)(param_descriptor->param_size));;
|
|
}
|
|
return instance_ptr;
|
|
}
|
|
|
|
// The helper function to get time stamp in microseconds
|
|
static uint64_t sense_modbus_get_time_stamp_us(void)
|
|
{
|
|
uint64_t time_stamp = esp_timer_get_time();
|
|
return time_stamp;
|
|
}
|
|
|
|
// Initialization of Modbus stack
|
|
esp_err_t sense_modbus_init(void)
|
|
{
|
|
mb_communication_info_t comm = {
|
|
.port = MB_PORTNUM,
|
|
.mode = MB_MODE_RTU,
|
|
.baudrate = MB_BAUDRATE,
|
|
.parity = MB_PARITY
|
|
};
|
|
void* master_handler = NULL;
|
|
|
|
esp_err_t err = mbc_master_init(MB_PORT_SERIAL_MASTER, &master_handler);
|
|
SENSE_MB_CHECK((master_handler != NULL), ESP_ERR_INVALID_STATE,
|
|
"mb controller initialization fail.");
|
|
SENSE_MB_CHECK((err == ESP_OK), ESP_ERR_INVALID_STATE,
|
|
"mb controller initialization fail, returns(0x%x).",
|
|
(uint32_t)err);
|
|
err = mbc_master_setup((void*)&comm);
|
|
SENSE_MB_CHECK((err == ESP_OK), ESP_ERR_INVALID_STATE,
|
|
"mb controller setup fail, returns(0x%x).",
|
|
(uint32_t)err);
|
|
err = mbc_master_start();
|
|
SENSE_MB_CHECK((err == ESP_OK), ESP_ERR_INVALID_STATE,
|
|
"mb controller start fail, returns(0x%x).",
|
|
(uint32_t)err);
|
|
// Set UART pin numbers
|
|
err = uart_set_pin(MB_PORTNUM, CONFIG_MB_UART_TXD, CONFIG_MB_UART_RXD,
|
|
CONFIG_MB_UART_RTS, UART_PIN_NO_CHANGE);
|
|
SENSE_MB_CHECK((err == ESP_OK), ESP_ERR_INVALID_STATE,
|
|
"mb serial set pin failure, uart_set_pin() returned (0x%x).", (uint32_t)err);
|
|
// Set driver mode to Half Duplex
|
|
err = uart_set_mode(MB_PORTNUM, UART_MODE_RS485_HALF_DUPLEX);
|
|
SENSE_MB_CHECK((err == ESP_OK), ESP_ERR_INVALID_STATE,
|
|
"mb serial set mode failure, uart_set_mode() returned (0x%x).", (uint32_t)err);
|
|
vTaskDelay(5);
|
|
err = mbc_master_set_descriptor(&device_parameters[0], num_device_parameters);
|
|
SENSE_MB_CHECK((err == ESP_OK), ESP_ERR_INVALID_STATE,
|
|
"mb controller set descriptor fail, returns(0x%x).",
|
|
(uint32_t)err);
|
|
return err;
|
|
}
|
|
|
|
// Check Modbus parameters description table and create characteristic description table according to it
|
|
esp_err_t sense_modbus_get_characteristics(characteristic_descriptor_t** cid_table, uint16_t* table_size)
|
|
{
|
|
SENSE_MB_CHECK((table_size != NULL), ESP_ERR_INVALID_ARG, "incorrect cid table size.");
|
|
SENSE_MB_CHECK((*table_size >= 1), ESP_ERR_NOT_FOUND, "incorrect cid of characteristic.");
|
|
SENSE_MB_CHECK((cid_table != NULL), ESP_ERR_INVALID_ARG, "incorrect cid table pointer.");
|
|
|
|
esp_err_t error_code = ESP_OK;
|
|
const mb_parameter_descriptor_t* param_descriptor = NULL;
|
|
characteristic_descriptor_t* cid_instance_ptr = NULL;
|
|
uint16_t cid_cnt = 0;
|
|
for (cid_cnt = 0; (error_code != ESP_ERR_NOT_FOUND) && (cid_cnt < *table_size); cid_cnt++) {
|
|
// Get data from parameters description table
|
|
// and use this information to fill the characteristics description table
|
|
// and having all required fields in just one table
|
|
error_code = mbc_master_get_cid_info(cid_cnt, ¶m_descriptor);
|
|
if ((error_code != ESP_ERR_NOT_FOUND) && (param_descriptor != NULL)) {
|
|
void* temp_data_ptr = sense_modbus_get_param_data(param_descriptor);
|
|
SENSE_MB_CHECK((temp_data_ptr != NULL),
|
|
ESP_ERR_INVALID_STATE, "incorrect instance pointer for cid.");
|
|
// Allocate space for characteristic description
|
|
cid_instance_ptr = (characteristic_descriptor_t*)malloc(sizeof(characteristic_descriptor_t));
|
|
// If not enough memory, try to repair from this error
|
|
SENSE_MB_CHECK((cid_instance_ptr != NULL),
|
|
ESP_ERR_NO_MEM, "incorrect memory allocation for the cid.");
|
|
cid_table[cid_cnt] = cid_instance_ptr;
|
|
// Fill the description according to parameter description table
|
|
cid_instance_ptr->instance_ptr = temp_data_ptr;
|
|
cid_instance_ptr->param_opts = param_descriptor->param_opts;
|
|
cid_instance_ptr->cid = param_descriptor->cid;
|
|
cid_instance_ptr->access = param_descriptor->access;
|
|
cid_instance_ptr->param_key = param_descriptor->param_key;
|
|
cid_instance_ptr->param_units = param_descriptor->param_units;
|
|
cid_instance_ptr->status = ESP_FAIL;
|
|
cid_instance_ptr->instance_size = (size_t)param_descriptor->param_size;
|
|
cid_instance_ptr->instance_type = param_descriptor->param_type;
|
|
cid_instance_ptr->change_flag = 0; // clear flag
|
|
cid_instance_ptr->timestamp = 0; // Keeps timestamp of updated value
|
|
assert(cid_instance_ptr->param_key != NULL);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
ESP_LOGI(TAG, "%s: Found (%u) characteristics in table.", __FUNCTION__, cid_cnt);
|
|
// Keep the table pointer and size of table
|
|
active_cid_table = cid_table;
|
|
active_cid_table_size = cid_cnt;
|
|
*table_size = cid_cnt;
|
|
return ESP_OK;
|
|
}
|
|
|
|
// Read characteristic value from Modbus parameter according to description table
|
|
esp_err_t sense_modbus_read_value(uint16_t cid, void *value)
|
|
{
|
|
assert(active_cid_table != NULL);
|
|
SENSE_MB_CHECK((value != NULL), ESP_ERR_INVALID_ARG, "incorrect value pointer.");
|
|
SENSE_MB_CHECK((cid < active_cid_table_size), ESP_ERR_INVALID_ARG, "incorrect cid to read.");
|
|
characteristic_descriptor_t* cid_info = active_cid_table[cid];
|
|
SENSE_MB_CHECK((cid_info->instance_ptr != NULL), ESP_ERR_INVALID_STATE, "incorrect cid table instance_pointer.");
|
|
SENSE_MB_CHECK((cid_info->param_key != NULL), ESP_ERR_INVALID_STATE, "incorrect cid table or not initialized.");
|
|
SENSE_MB_CHECK((cid_info->cid == cid), ESP_ERR_INVALID_STATE, "incorrect cid table or not initialized.");
|
|
|
|
// Set the data pointer for get request to value instance
|
|
uint8_t* value_ptr = (uint8_t*)cid_info->instance_ptr;
|
|
uint8_t type = 0;
|
|
memset((void*)value_ptr, 0, cid_info->instance_size); // Clear value instance first
|
|
|
|
// Send Modbus request to read cid correspond registers
|
|
esp_err_t error = mbc_master_get_parameter(cid, (char*)cid_info->param_key, value_ptr, &type);
|
|
SENSE_MB_CHECK((type <= PARAM_TYPE_ASCII), ESP_ERR_NOT_SUPPORTED, "returned data type is not supported (%u)", type);
|
|
cid_info->status = error; // Keep last read status of the cid in the information table
|
|
if (error == ESP_OK) {
|
|
// Copy the value to param
|
|
memcpy((void*)value, (void*)value_ptr, cid_info->instance_size);
|
|
cid_info->timestamp = sense_modbus_get_time_stamp_us(); // Set timestamp of last access to cid
|
|
}
|
|
return error;
|
|
}
|
|
|
|
// Write characteristic value into associated Modbus parameter
|
|
esp_err_t sense_modbus_send_value(uint16_t cid, void* value)
|
|
{
|
|
assert(active_cid_table != NULL);
|
|
SENSE_MB_CHECK((cid < active_cid_table_size), ESP_ERR_INVALID_ARG, "incorrect cid to set.");
|
|
characteristic_descriptor_t* cid_info = active_cid_table[cid];
|
|
SENSE_MB_CHECK((cid_info->instance_ptr != NULL), ESP_ERR_INVALID_STATE, "incorrect cid table instance_ptr.");
|
|
SENSE_MB_CHECK((cid_info->param_key != NULL), ESP_ERR_INVALID_STATE, "incorrect cid table param_key or not initialized.");
|
|
SENSE_MB_CHECK((cid_info->cid == cid), ESP_ERR_INVALID_STATE, "incorrect cid in table or not initialized.");
|
|
|
|
uint8_t* value_ptr = (uint8_t*)cid_info->instance_ptr;
|
|
// Set the instance value of the characteristic to the value
|
|
memcpy((void*)value_ptr, (void*)value, cid_info->instance_size);
|
|
|
|
uint8_t type = 0;
|
|
// Set modbus parameter according to value of characteristic
|
|
esp_err_t error = mbc_master_set_parameter(cid, (char*)cid_info->param_key, value_ptr, &type);
|
|
SENSE_MB_CHECK((cid_info->instance_type == type), ESP_ERR_NOT_FOUND, "incorrect type of parameter (%u)", type);
|
|
SENSE_MB_CHECK((type <= PARAM_TYPE_ASCII), ESP_ERR_NOT_SUPPORTED, "returned data type is not supported (%u)", type);
|
|
cid_info->change_flag = 0x55; // Set value changed flag to inform higher level
|
|
cid_info->status = error; // Keep last read/write status of cid in the information table
|
|
cid_info->timestamp = sense_modbus_get_time_stamp_us(); // Set time stamp of last access to cid
|
|
return error;
|
|
}
|
|
|
|
// Get cid data from characteristic description table
|
|
esp_err_t sense_modbus_get_cid_data(uint16_t cid, characteristic_descriptor_t* cid_data)
|
|
{
|
|
assert(active_cid_table != NULL);
|
|
SENSE_MB_CHECK((cid_data != NULL), ESP_ERR_INVALID_ARG, "incorrect data pointer.");
|
|
SENSE_MB_CHECK((cid < active_cid_table_size), ESP_ERR_INVALID_ARG, "cid is not found in the table.");
|
|
|
|
characteristic_descriptor_t* cid_info = active_cid_table[cid];
|
|
SENSE_MB_CHECK((cid_info != NULL), ESP_ERR_INVALID_STATE, "incorrect cid table or not initialized.");
|
|
SENSE_MB_CHECK((cid_info->instance_ptr != NULL), ESP_ERR_INVALID_STATE, "incorrect cid table instance_ptr.");
|
|
SENSE_MB_CHECK((cid_info->param_key != NULL), ESP_ERR_INVALID_STATE, "incorrect cid table param_key.");
|
|
SENSE_MB_CHECK((cid_info->cid == cid), ESP_ERR_INVALID_STATE, "incorrect cid in the table or not initialized.");
|
|
*cid_data = *cid_info; // Set cid data
|
|
cid_info->change_flag = 0x00; // Reset flag once we get changed value
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
// Todo: add modbus code here
|