5379c941b8
Update freemodbus component file esp-idf/components/freemodbus/port/portserial.c to remove UART mode settings; Move UART mode settings into esp-idf/examples/protocols/modbus_slave/main/freemodbus.c Move UART pin settings from Component config into example Kconfig.projbuild file Move setup of UART port pins from freemodbus component into example file TW#27721 Closes https://github.com/espressif/esp-idf/issues/2784#issuecomment-443600157
176 lines
8.3 KiB
C
176 lines
8.3 KiB
C
/* FreeModbus Slave Example ESP32
|
|
|
|
Unless required by applicable law or agreed to in writing, this
|
|
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
|
|
CONDITIONS OF ANY KIND, either express or implied.
|
|
*/
|
|
#include <stdio.h>
|
|
#include "esp_err.h"
|
|
#include "sdkconfig.h"
|
|
#include "mbcontroller.h" // for mbcontroller defines and api
|
|
#include "deviceparams.h" // for device parameters structures
|
|
#include "esp_log.h" // for log_write
|
|
|
|
#define MB_PORT_NUM (2) // Number of UART port used for Modbus connection
|
|
#define MB_DEV_ADDR (1) // The address of device in Modbus network
|
|
#define MB_DEV_SPEED (115200) // The communication speed of the UART
|
|
|
|
// Defines below are used to define register start address for each type of Modbus registers
|
|
#define MB_REG_DISCRETE_INPUT_START (0x0000)
|
|
#define MB_REG_INPUT_START (0x0000)
|
|
#define MB_REG_HOLDING_START (0x0000)
|
|
#define MB_REG_COILS_START (0x0000)
|
|
|
|
#define MB_PAR_INFO_GET_TOUT (10) // Timeout for get parameter info
|
|
#define MB_CHAN_DATA_MAX_VAL (10)
|
|
#define MB_CHAN_DATA_OFFSET (0.01f)
|
|
|
|
static const char *TAG = "MODBUS_SLAVE_APP";
|
|
|
|
// Set register values into known state
|
|
static void setup_reg_data()
|
|
{
|
|
// Define initial state of parameters
|
|
discrete_reg_params.discrete_input1 = 1;
|
|
discrete_reg_params.discrete_input3 = 1;
|
|
discrete_reg_params.discrete_input5 = 1;
|
|
discrete_reg_params.discrete_input7 = 1;
|
|
|
|
holding_reg_params.data_chan0 = 1.34;
|
|
holding_reg_params.data_chan1 = 2.56;
|
|
holding_reg_params.data_chan2 = 3.78;
|
|
holding_reg_params.data_chan3 = 4.90;
|
|
|
|
coil_reg_params.coil0 = 1;
|
|
coil_reg_params.coil2 = 1;
|
|
coil_reg_params.coil4 = 1;
|
|
coil_reg_params.coil6 = 1;
|
|
coil_reg_params.coil7 = 1;
|
|
|
|
input_reg_params.data_chan0 = 1.34;
|
|
input_reg_params.data_chan1 = 2.56;
|
|
input_reg_params.data_chan2 = 3.78;
|
|
input_reg_params.data_chan3 = 4.90;
|
|
}
|
|
|
|
// An example application of Modbus slave. It is based on freemodbus stack.
|
|
// See deviceparams.h file for more information about assigned Modbus parameters.
|
|
// These parameters can be accessed from main application and also can be changed
|
|
// by external Modbus master host.
|
|
void app_main()
|
|
{
|
|
mb_param_info_t reg_info; // keeps the Modbus registers access information
|
|
mb_communication_info_t comm_info; // Modbus communication parameters
|
|
mb_register_area_descriptor_t reg_area; // Modbus register area descriptor structure
|
|
|
|
// Set UART log level
|
|
esp_log_level_set(TAG, ESP_LOG_INFO);
|
|
|
|
mbcontroller_init(); // Initialization of Modbus controller
|
|
|
|
// Setup communication parameters and start stack
|
|
comm_info.mode = MB_MODE_RTU;
|
|
comm_info.slave_addr = MB_DEV_ADDR;
|
|
comm_info.port = MB_PORT_NUM;
|
|
comm_info.baudrate = MB_DEV_SPEED;
|
|
comm_info.parity = MB_PARITY_NONE;
|
|
ESP_ERROR_CHECK(mbcontroller_setup(comm_info));
|
|
|
|
// The code below initializes Modbus register area descriptors
|
|
// for Modbus Holding Registers, Input Registers, Coils and Discrete Inputs
|
|
// Initialization should be done for each supported Modbus register area according to register map.
|
|
// When external master trying to access the register in the area that is not initialized
|
|
// by mbcontroller_set_descriptor() API call then Modbus stack
|
|
// will send exception response for this register area.
|
|
reg_area.type = MB_PARAM_HOLDING; // Set type of register area
|
|
reg_area.start_offset = MB_REG_HOLDING_START; // Offset of register area in Modbus protocol
|
|
reg_area.address = (void*)&holding_reg_params; // Set pointer to storage instance
|
|
reg_area.size = sizeof(holding_reg_params); // Set the size of register storage instance
|
|
ESP_ERROR_CHECK(mbcontroller_set_descriptor(reg_area));
|
|
|
|
// Initialization of Input Registers area
|
|
reg_area.type = MB_PARAM_INPUT;
|
|
reg_area.start_offset = MB_REG_INPUT_START;
|
|
reg_area.address = (void*)&input_reg_params;
|
|
reg_area.size = sizeof(input_reg_params);
|
|
ESP_ERROR_CHECK(mbcontroller_set_descriptor(reg_area));
|
|
|
|
// Initialization of Coils register area
|
|
reg_area.type = MB_PARAM_COIL;
|
|
reg_area.start_offset = MB_REG_COILS_START;
|
|
reg_area.address = (void*)&coil_reg_params;
|
|
reg_area.size = sizeof(coil_reg_params);
|
|
ESP_ERROR_CHECK(mbcontroller_set_descriptor(reg_area));
|
|
|
|
// Initialization of Discrete Inputs register area
|
|
reg_area.type = MB_PARAM_DISCRETE;
|
|
reg_area.start_offset = MB_REG_DISCRETE_INPUT_START;
|
|
reg_area.address = (void*)&discrete_reg_params;
|
|
reg_area.size = sizeof(discrete_reg_params);
|
|
ESP_ERROR_CHECK(mbcontroller_set_descriptor(reg_area));
|
|
|
|
setup_reg_data(); // Set values into known state
|
|
|
|
// Starts of modbus controller and stack
|
|
ESP_ERROR_CHECK(mbcontroller_start());
|
|
|
|
// Set UART driver mode to Half Duplex
|
|
ESP_ERROR_CHECK(uart_set_mode(MB_PORT_NUM, UART_MODE_RS485_HALF_DUPLEX));
|
|
|
|
// Set UART pin numbers
|
|
ESP_ERROR_CHECK(uart_set_pin(MB_PORT_NUM, CONFIG_MB_UART_TXD,
|
|
CONFIG_MB_UART_RXD, CONFIG_MB_UART_RTS,
|
|
UART_PIN_NO_CHANGE));
|
|
|
|
// The cycle below will be terminated when parameter holdingRegParams.dataChan0
|
|
// incremented each access cycle reaches the CHAN_DATA_MAX_VAL value.
|
|
for(;holding_reg_params.data_chan0 < MB_CHAN_DATA_MAX_VAL;){
|
|
// Check for read/write events of Modbus master for certain events
|
|
mb_event_group_t event = mbcontroller_check_event((MB_EVENT_HOLDING_REG_WR
|
|
| MB_EVENT_INPUT_REG_RD
|
|
| MB_EVENT_HOLDING_REG_RD
|
|
| MB_EVENT_DISCRETE_RD));
|
|
// Filter events and process them accordingly
|
|
if((event & MB_EVENT_HOLDING_REG_WR) || (event & MB_EVENT_HOLDING_REG_RD)) {
|
|
// Get parameter information from parameter queue
|
|
ESP_ERROR_CHECK(mbcontroller_get_param_info(®_info, MB_PAR_INFO_GET_TOUT));
|
|
printf("HOLDING READ/WRITE: time_stamp(us):%u, mb_addr:%u, type:%u, st_address:0x%.4x, size:%u\r\n",
|
|
(uint32_t)reg_info.time_stamp,
|
|
(uint32_t)reg_info.mb_offset,
|
|
(uint32_t)reg_info.type,
|
|
(uint32_t)reg_info.address,
|
|
(uint32_t)reg_info.size);
|
|
if (reg_info.address == (uint8_t*)&holding_reg_params.data_chan0)
|
|
{
|
|
holding_reg_params.data_chan0 += MB_CHAN_DATA_OFFSET;
|
|
}
|
|
} else if (event & MB_EVENT_INPUT_REG_RD) {
|
|
ESP_ERROR_CHECK(mbcontroller_get_param_info(®_info, MB_PAR_INFO_GET_TOUT));
|
|
printf("INPUT READ: time_stamp(us):%u, mb_addr:%u, type:%u, st_address:0x%.4x, size:%u\r\n",
|
|
(uint32_t)reg_info.time_stamp,
|
|
(uint32_t)reg_info.mb_offset,
|
|
(uint32_t)reg_info.type,
|
|
(uint32_t)reg_info.address,
|
|
(uint32_t)reg_info.size);
|
|
} else if (event & MB_EVENT_DISCRETE_RD) {
|
|
ESP_ERROR_CHECK(mbcontroller_get_param_info(®_info, MB_PAR_INFO_GET_TOUT));
|
|
printf("DISCRETE READ: time_stamp(us):%u, mb_addr:%u, type:%u, st_address:0x%.4x, size:%u\r\n",
|
|
(uint32_t)reg_info.time_stamp,
|
|
(uint32_t)reg_info.mb_offset,
|
|
(uint32_t)reg_info.type,
|
|
(uint32_t)reg_info.address,
|
|
(uint32_t)reg_info.size);
|
|
} else if (event & MB_EVENT_COILS_RD) {
|
|
ESP_ERROR_CHECK(mbcontroller_get_param_info(®_info, MB_PAR_INFO_GET_TOUT));
|
|
printf("COILS READ: time_stamp(us):%u, mb_addr:%u, type:%u, st_address:0x%.4x, size:%u\r\n",
|
|
(uint32_t)reg_info.time_stamp,
|
|
(uint32_t)reg_info.mb_offset,
|
|
(uint32_t)reg_info.type,
|
|
(uint32_t)reg_info.address,
|
|
(uint32_t)reg_info.size);
|
|
}
|
|
}
|
|
// Destroy of Modbus controller once get maximum value of data_chan0
|
|
printf("Modbus controller destroyed.");
|
|
ESP_ERROR_CHECK(mbcontroller_destroy());
|
|
}
|