62 lines
1.1 KiB
C
62 lines
1.1 KiB
C
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#ifndef _MODBUS_H
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#define _MODBUS_H
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#include <stdint.h>
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#define SLAVE_ID_DEFAULT (1u)
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#define MODBUS_SLAVE_ID 0
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#define MODBUS_FUN_CODE 1
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#define MODBUS_START_ADDR_H 2
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#define MODBUS_START_ADDR_L 3
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#define MODBUS_SIZE_H 4
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#define MODBUS_SIZE_L 5
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#define MODBUS_06_VAL_H 4
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#define MODBUS_06_VAL_L 5
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typedef enum {
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MODBUS_STATUS_OK,
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MODBUS_STATUS_ERR
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} ModbusStatus_t;
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ModbusStatus_t modbus_process(const uint8_t * buffer_cmd, uint8_t recv_len, uint8_t * buffer_resp, uint8_t * resp_len);
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typedef struct {
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uint8_t slaveAddr;
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uint8_t funCode;
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uint16_t startAddr;
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uint16_t num;
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uint16_t crc;
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} ModbusFrameCmd03_t;
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typedef struct {
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uint8_t slaveAddr;
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uint8_t funCode;
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uint8_t byteNum;
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uint16_t data[125];
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uint16_t crc;
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} ModbusFrameRes03_t;
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/* 06功能码命令和响应格式一样 */
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typedef struct {
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uint8_t slaveAddr;
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uint8_t funCode;
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uint16_t regAddr;
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uint16_t regValue;
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uint16_t crc;
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} ModbusFrameCmdRes06_t;
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typedef struct {
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} ModbusFrameCmd0A_t;
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typedef struct {
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} ModbusFrameRes0A_t;
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#endif
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