移植了官方Modbus程序的部分代码

main/CMakeLists.txt

@@ -3,7 +3,7 @@ if(CONFIG_EXAMPLE_LCD_IMAGE_FROM_EMBEDDED_BINARY)
     file(GLOB_RECURSE embedded_images images/*.c)
 endif()
 
-idf_component_register(SRCS "i80_controller_example_main.c" "lvgl_demo_ui.c" ${embedded_images}
+idf_component_register(SRCS "FreeBus.c" "i80_controller_example_main.c" "lvgl_demo_ui.c" ${embedded_images}
 REQUIRES FluxUI FluxPower spiffs                  
 INCLUDE_DIRS ".")
 

main/FreeBus.c

@@ -0,0 +1,65 @@
+
+#include "FreeBus.h"
+
+static const char *TAG = "MASTER_TEST";
+
+
+/*定义设备寄存器存储地址*/
+const mb_parameter_descriptor_t device_parameters[] = {
+    { CID_INP_DATA_0, STR("Data_channel_0"), STR("Volts"), MB_DEVICE_ADDR1, MB_PARAM_INPUT, 0, 2,
+        INPUT_OFFSET(input_data0), PARAM_TYPE_FLOAT, 4, OPTS( -10, 10, 1 ), PAR_PERMS_READ_WRITE_TRIGGER },
+    { CID_HOLD_DATA_0, STR("Humidity_1"), STR("%rH"), MB_DEVICE_ADDR1, MB_PARAM_HOLDING, 0, 2,
+            HOLD_OFFSET(holding_data0), PARAM_TYPE_FLOAT, 4, OPTS( 0, 100, 1 ), PAR_PERMS_READ_WRITE_TRIGGER },
+};
+// Calculate number of parameters in the table
+const uint16_t num_device_parameters = (sizeof(device_parameters)/sizeof(device_parameters[0]));
+
+static esp_err_t master_init(void)
+{
+    // Initialize and start Modbus controller
+    mb_communication_info_t comm = {
+            .port = MB_PORT_NUM,
+#if CONFIG_MB_COMM_MODE_ASCII
+            .mode = MB_MODE_ASCII,
+#elif CONFIG_MB_COMM_MODE_RTU
+            .mode = MB_MODE_RTU,
+#endif
+            .baudrate = MB_DEV_SPEED,
+            .parity = MB_PARITY_NONE
+    };
+    void* master_handler = NULL;
+
+    esp_err_t err = mbc_master_init(MB_PORT_SERIAL_MASTER, &master_handler);
+    MB_RETURN_ON_FALSE((master_handler != NULL), ESP_ERR_INVALID_STATE, TAG,
+                                "mb controller initialization fail.");
+    MB_RETURN_ON_FALSE((err == ESP_OK), ESP_ERR_INVALID_STATE, TAG,
+                            "mb controller initialization fail, returns(0x%x).", (int)err);
+    err = mbc_master_setup((void*)&comm);
+    MB_RETURN_ON_FALSE((err == ESP_OK), ESP_ERR_INVALID_STATE, TAG,
+                            "mb controller setup fail, returns(0x%x).", (int)err);
+
+    // Set UART pin numbers
+    err = uart_set_pin(MB_PORT_NUM, CONFIG_MB_UART_TXD, CONFIG_MB_UART_RXD,
+                              UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
+    MB_RETURN_ON_FALSE((err == ESP_OK), ESP_ERR_INVALID_STATE, TAG,
+        "mb serial set pin failure, uart_set_pin() returned (0x%x).", (int)err);
+
+    err = mbc_master_start();
+    MB_RETURN_ON_FALSE((err == ESP_OK), ESP_ERR_INVALID_STATE, TAG,
+                            "mb controller start fail, returned (0x%x).", (int)err);
+
+    // Set driver mode to Half Duplex
+    err = uart_set_mode(MB_PORT_NUM, UART_MODE_RS485_HALF_DUPLEX);
+    MB_RETURN_ON_FALSE((err == ESP_OK), ESP_ERR_INVALID_STATE, TAG,
+            "mb serial set mode failure, uart_set_mode() returned (0x%x).", (int)err);
+
+    vTaskDelay(5);
+    err = mbc_master_set_descriptor(&device_parameters[0], num_device_parameters);
+    MB_RETURN_ON_FALSE((err == ESP_OK), ESP_ERR_INVALID_STATE, TAG,
+                                "mb controller set descriptor fail, returns(0x%x).", (int)err);
+    ESP_LOGI(TAG, "Modbus master stack initialized...");
+    return err;
+}
+
+
+

main/FreeBus.h

@@ -1,7 +1,65 @@
 #include "modbus_params.h"  // for modbus parameters structures
 #include "mbcontroller.h"
+#include "string.h"
+#include "esp_log.h"
 
-#define MB_PORT_NUM     (CONFIG_MB_UART_PORT_NUM)   // Number of UART port used for Modbus connection
-#define MB_DEV_SPEED    (CONFIG_MB_UART_BAUD_RATE)  // The communication speed of the UART
+#define MB_PORT_NUM     (UART_NUM_1)   // Number of UART port used for Modbus connection
+#define MB_DEV_SPEED    (9600)  // The communication speed of the UART
 
+// Note: Some pins on target chip cannot be assigned for UART communication.
+// See UART documentation for selected board and target to configure pins using Kconfig.
 
+// The number of parameters that intended to be used in the particular control process
+#define MASTER_MAX_CIDS num_device_parameters
+
+// Number of reading of parameters from slave
+#define MASTER_MAX_RETRY 30
+
+// Timeout to update cid over Modbus
+#define UPDATE_CIDS_TIMEOUT_MS          (500)
+#define UPDATE_CIDS_TIMEOUT_TICS        (UPDATE_CIDS_TIMEOUT_MS / portTICK_PERIOD_MS)
+
+// Timeout between polls
+#define POLL_TIMEOUT_MS                 (1)
+#define POLL_TIMEOUT_TICS               (POLL_TIMEOUT_MS / portTICK_PERIOD_MS)
+
+// The macro to get offset for parameter in the appropriate structure
+#define HOLD_OFFSET(field) ((uint16_t)(offsetof(holding_reg_params_t, field) + 1))
+#define INPUT_OFFSET(field) ((uint16_t)(offsetof(input_reg_params_t, field) + 1))
+#define COIL_OFFSET(field) ((uint16_t)(offsetof(coil_reg_params_t, field) + 1))
+// Discrete offset macro
+#define DISCR_OFFSET(field) ((uint16_t)(offsetof(discrete_reg_params_t, field) + 1))
+
+#define STR(fieldname) ((const char*)( fieldname ))
+// Options can be used as bit masks or parameter limits
+#define OPTS(min_val, max_val, step_val) { .opt1 = min_val, .opt2 = max_val, .opt3 = step_val }
+
+/*串口通讯接口定义*/
+#define CONFIG_MB_UART_TXD 0
+#define CONFIG_MB_UART_RXD 1
+
+//#define MB_PORT_NUM UART_NUM_1
+//#define MB_DEV_SPEED 9600
+
+// Enumeration of modbus device addresses accessed by master device
+enum {
+    MB_DEVICE_ADDR1 = 1 // Only one slave device used for the test (add other slave addresses here)
+};
+
+// Enumeration of all supported CIDs for device (used in parameter definition table)
+enum {
+    CID_INP_DATA_0 = 0,
+    CID_HOLD_DATA_0,
+    CID_INP_DATA_1,
+    CID_HOLD_DATA_1,
+    CID_INP_DATA_2,
+    CID_HOLD_DATA_2,
+    CID_HOLD_TEST_REG,
+    CID_RELAY_P1,
+    CID_RELAY_P2,
+    CID_DISCR_P1,
+    CID_COUNT
+};
+
+/*Modbus总线初始化函数*/
+static esp_err_t master_init(void);