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50 lines
1.1 KiB
50 lines
1.1 KiB
2 months ago
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/*
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* Generic MODBUS Library for STM32
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*
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* (c) 2019--2023 Martin Mareš <mj@ucw.cz>
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*/
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#ifndef _MODBUS_H
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#define _MODBUS_H
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void modbus_init(void);
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void modbus_loop(void);
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// If a call-back wants to signal a slave error in the reply
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void modbus_slave_error(void);
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bool modbus_is_idle(void);
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// Callbacks
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bool modbus_check_discrete_input(u16 addr);
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bool modbus_get_discrete_input(u16 addr);
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bool modbus_check_coil(u16 addr);
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bool modbus_get_coil(u16 addr);
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void modbus_set_coil(u16 addr, bool value);
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bool modbus_check_input_register(u16 addr);
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u16 modbus_get_input_register(u16 addr);
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bool modbus_check_holding_register(u16 addr);
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u16 modbus_get_holding_register(u16 addr);
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void modbus_set_holding_register(u16 addr, u16 value);
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void modbus_ready_hook(void);
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void modbus_frame_start_hook(void);
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enum modbus_id_object {
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MODBUS_ID_VENDOR_NAME, // first three must be always defined
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MODBUS_ID_PRODUCT_CODE,
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MODBUS_ID_MAJOR_MINOR_REVISION,
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MODBUS_ID_VENDOR_URL, // the rest may be NULL
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MODBUS_ID_PRODUCT_NAME,
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MODBUS_ID_USER_APP_NAME,
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MODBUS_ID_MAX,
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};
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extern const char * const modbus_id_strings[MODBUS_ID_MAX];
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#endif
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