Ive combined enc28j60 example with modbus slave tcp example.
Device gets address from dhcp without any problem.
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When I want to read some data from device I do not get any response. Console clearly indicates that it recieved frame and accepted client communication but nothing else happends.
this is log on eth starup:
- I (3563) eth_example: Ethernet Got IP Address
- I (3573) eth_example: ~~~~~~~~~~~
- I (3573) eth_example: ETHIP:192.168.1.34
- I (3583) eth_example: ETHMASK:255.255.255.0
- I (3583) eth_example: ETHGW:192.168.1.1
- I (3593) eth_example: ~~~~~~~~~~~
- D (5673) MB_PORT_COMMON: vMBPortSetMode: Port enter critical.
- D (5673) MB_PORT_COMMON: vMBPortSetMode: Port exit critical
- W (5673) eth_example: Input reg. set to 000000
- I (5673) MB_TCP_SLAVE_PORT: Protocol stack initialized.
- D (5683) MB_PORT_COMMON: TCP Slave port enable.
- I (5683) MB_TCP_SLAVE_PORT: Socket (#54), listener 192.168.1.34 on port: 502, errno=0
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As you can see there seems to be no problem but after trying to communicate with device I do not get any response. .
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My console looks like this while trying to commuincate:
- I (165093) MB_TCP_SLAVE_PORT: Socket (#55), accept client connection from address: 192.168.1.12
- D (165093) MB_TCP_SLAVE_PORT: | TID = 0001 | PID = 0000 | LEN = 0006 | UID = 01 | FUNC = 04 | DATA = 00000001 |
- D (165103) MB_TCP_SLAVE_PORT: Socket (#55)(192.168.1.12), get packet TID=0x1, 12 bytes.
- D (165103) MB_PORT_COMMON: EV_FRAME_RECEIVED
- D (165113) MB_PORT_COMMON: 04 00 00 00 01
- D (165123) MB_PORT_COMMON: eMBPoll:EV_EXECUTE
- D (165123) MB_TCP_SLAVE_PORT: Client 0, Socket(#55), processing time = 22852 (us).
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So it clearly recives frame but it doesn't do anything with it.
next data recieve attempt just drops the connection:
- E (163033) MB_TCP_SLAVE_PORT: Socket (#55)(192.168.1.12), connection closed by peer.
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Here is my Code:
- #include <stdio.h>
- #include <string.h>
- #include "sdkconfig.h"
- #include "freertos/FreeRTOS.h"
- #include "freertos/task.h"
- #include "esp_netif.h"
- #include "esp_eth.h"
- #include "esp_event.h"
- #include "esp_log.h"
- #include "driver/gpio.h"
- #include "driver/spi_master.h"
- #include "eth_enc28j60/esp_eth_enc28j60.h"
- #include "mbcontroller.h"
- void modbus_tcp(void);
- void modbus_slave_task(void *pvParameter);
- static const char *TAG = "eth_example";
- /** Event handler for Ethernet events */
- static void eth_event_handler(void *arg, esp_event_base_t event_base,
- int32_t event_id, void *event_data)
- {
- uint8_t mac_addr[6] = {0};
- /* we can get the ethernet driver handle from event data */
- esp_eth_handle_t eth_handle = *(esp_eth_handle_t *)event_data;
- switch (event_id)
- {
- case ETHERNET_EVENT_CONNECTED:
- esp_eth_ioctl(eth_handle, ETH_CMD_G_MAC_ADDR, mac_addr);
- ESP_LOGI(TAG, "Ethernet Link Up");
- ESP_LOGI(TAG, "Ethernet HW Addr %02x:%02x:%02x:%02x:%02x:%02x",
- mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5]);
- break;
- case ETHERNET_EVENT_DISCONNECTED:
- ESP_LOGI(TAG, "Ethernet Link Down");
- break;
- case ETHERNET_EVENT_START:
- ESP_LOGI(TAG, "Ethernet Started");
- break;
- case ETHERNET_EVENT_STOP:
- ESP_LOGI(TAG, "Ethernet Stopped");
- break;
- default:
- break;
- }
- }
- // char *ip;
- /** Event handler for IP_EVENT_ETH_GOT_IP */
- static void got_ip_event_handler(void *arg, esp_event_base_t event_base,
- int32_t event_id, void *event_data)
- {
- ip_event_got_ip_t *event = (ip_event_got_ip_t *)event_data;
- const esp_netif_ip_info_t *ip_info = &event->ip_info;
- ESP_LOGI(TAG, "Ethernet Got IP Address");
- ESP_LOGI(TAG, "~~~~~~~~~~~");
- ESP_LOGI(TAG, "ETHIP:" IPSTR, IP2STR(&ip_info->ip));
- ESP_LOGI(TAG, "ETHMASK:" IPSTR, IP2STR(&ip_info->netmask));
- ESP_LOGI(TAG, "ETHGW:" IPSTR, IP2STR(&ip_info->gw));
- ESP_LOGI(TAG, "~~~~~~~~~~~");
- // modbus_tcp();
- }
- esp_netif_t *eth_netif;
- void init_eth(void)
- {
- ESP_ERROR_CHECK(gpio_install_isr_service(0));
- // Initialize TCP/IP network interface (should be called only once in application)
- ESP_ERROR_CHECK(esp_netif_init());
- // Create default event loop that running in background
- ESP_ERROR_CHECK(esp_event_loop_create_default());
- esp_netif_config_t netif_cfg = ESP_NETIF_DEFAULT_ETH();
- eth_netif = esp_netif_new(&netif_cfg);
- spi_bus_config_t buscfg = {
- .miso_io_num = 39,
- .mosi_io_num = 40,
- .sclk_io_num = 41,
- .quadwp_io_num = -1,
- .quadhd_io_num = -1,
- };
- ESP_ERROR_CHECK(spi_bus_initialize(SPI2_HOST, &buscfg, SPI_DMA_CH_AUTO));
- /* ENC28J60 ethernet driver is based on spi driver */
- spi_device_interface_config_t devcfg = {
- .command_bits = 3,
- .address_bits = 5,
- .mode = 0,
- .clock_speed_hz = 8 * 1000 * 1000,
- .spics_io_num = 42,
- .queue_size = 20,
- .cs_ena_posttrans = enc28j60_cal_spi_cs_hold_time(8),
- };
- spi_device_handle_t spi_handle = NULL;
- ESP_ERROR_CHECK(spi_bus_add_device(SPI2_HOST, &devcfg, &spi_handle));
- eth_enc28j60_config_t enc28j60_config = ETH_ENC28J60_DEFAULT_CONFIG(spi_handle);
- enc28j60_config.int_gpio_num = 38;
- eth_mac_config_t mac_config = ETH_MAC_DEFAULT_CONFIG();
- mac_config.smi_mdc_gpio_num = -1; // ENC28J60 doesn't have SMI interface
- mac_config.smi_mdio_gpio_num = -1;
- esp_eth_mac_t *mac = esp_eth_mac_new_enc28j60(&enc28j60_config, &mac_config);
- eth_phy_config_t phy_config = ETH_PHY_DEFAULT_CONFIG();
- phy_config.autonego_timeout_ms = 0; // ENC28J60 doesn't support auto-negotiation
- phy_config.reset_gpio_num = -1; // ENC28J60 doesn't have a pin to reset internal PHY
- esp_eth_phy_t *phy = esp_eth_phy_new_enc28j60(&phy_config);
- esp_eth_config_t eth_config = ETH_DEFAULT_CONFIG(mac, phy);
- esp_eth_handle_t eth_handle = NULL;
- ESP_ERROR_CHECK(esp_eth_driver_install(ð_config, ð_handle));
- /* ENC28J60 doesn't burn any factory MAC address, we need to set it manually.
- 02:00:00 is a Locally Administered OUI range so should not be used except when testing on a LAN under your control.
- */
- mac->set_addr(mac, (uint8_t[]){
- 0x02, 0x00, 0x00, 0x12, 0x34, 0x56});
- // ENC28J60 Errata #1 check
- if (emac_enc28j60_get_chip_info(mac) < ENC28J60_REV_B5)
- {
- ESP_LOGE(TAG, "SPI frequency must be at least 8 MHz for chip revision less than 5");
- ESP_ERROR_CHECK(ESP_FAIL);
- }
- /* attach Ethernet driver to TCP/IP stack */
- ESP_ERROR_CHECK(esp_netif_attach(eth_netif, esp_eth_new_netif_glue(eth_handle)));
- // Register user defined event handers
- ESP_ERROR_CHECK(esp_event_handler_register(ETH_EVENT, ESP_EVENT_ANY_ID, ð_event_handler, NULL));
- ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_ETH_GOT_IP, &got_ip_event_handler, NULL));
- /* start Ethernet driver state machine */
- ESP_ERROR_CHECK(esp_eth_start(eth_handle));
- }
- mb_register_area_descriptor_t reg_area;
- mb_param_info_t reg_info;
- void setup_input_register(uint16_t offset, void *values, int size)
- {
- reg_area.type = MB_PARAM_INPUT;
- reg_area.start_offset = offset;
- reg_area.address = values;
- reg_area.size = size;
- mbc_slave_set_descriptor(reg_area);
- ESP_LOGW(TAG, "Input reg. set to %#06x", offset);
- }
- void modbus_tcp(void)
- {
- mb_communication_info_t comm_info = {0};
- comm_info.ip_addr_type = MB_IPV4;
- comm_info.ip_mode = MB_MODE_TCP;
- comm_info.ip_port = 502;
- void *slave_handler = NULL;
- // Initialization of Modbus controller
- esp_err_t err = mbc_slave_init_tcp(&slave_handler);
- MB_RETURN_ON_FALSE((err == ESP_OK && slave_handler != NULL), ESP_ERR_INVALID_STATE,
- TAG,
- "mb controller initialization fail.");
- comm_info.ip_addr = "192.168.1.34"; // Bind to any address
- comm_info.ip_netif_ptr = eth_netif;
- // Setup communication parameters and start stack
- err = mbc_slave_setup(&comm_info);
- MB_RETURN_ON_FALSE((err == ESP_OK), ESP_ERR_INVALID_STATE,
- TAG,
- "mbc_slave_setup fail, returns(0x%x).",
- (uint32_t)err);
- uint16_t test = 5;
- setup_input_register(0x0, &test, 1);
- mbc_slave_start();
- }
- #define MB_PAR_INFO_GET_TIME_OUT 20
- #define MB_READ_MASK (MB_EVENT_INPUT_REG_RD | MB_EVENT_HOLDING_REG_RD | MB_EVENT_DISCRETE_RD | MB_EVENT_COILS_RD)
- #define MB_WRITE_MASK (MB_EVENT_HOLDING_REG_WR | MB_EVENT_COILS_WR)
- #define MB_READ_WRITE_MASK (MB_READ_MASK | MB_WRITE_MASK)
- void modbus_slave_task(void *pvParameter)
- {
- esp_err_t rc;
- while (1)
- {
- rc = ESP_OK;
- vTaskDelay(pdMS_TO_TICKS(100));
- mb_event_group_t event = mbc_slave_check_event(MB_READ_WRITE_MASK);
- ESP_LOGW(TAG, "0x%x", event);
- // Check for read/write events of Modbus master for certain events
- /* input register read */
- if (event & MB_EVENT_INPUT_REG_RD)
- {
- rc += mbc_slave_get_param_info(®_info, MB_PAR_INFO_GET_TIME_OUT);
- ESP_LOGI(TAG, "INPUT READ:, ADDR:%u, SIZE:%u",
- (uint32_t)reg_info.address,
- (uint32_t)reg_info.size);
- /* discrete register read */
- }
- }
- // Destroy of Modbus controller on alarm
- ESP_LOGE(TAG, "Modbus controller destroyed.");
- vTaskDelay(100);
- }
- void app_main(void)
- {
- init_eth();
- vTaskDelay(pdMS_TO_TICKS(5000));
- modbus_tcp();
- modbus_slave_task(NULL);
- }
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I've looked all internet through and could not find anything helpfull. Waiting for response .