2 * Generic MODBUS Library for STM32
4 * (c) 2019 Martin Mareš <mj@ucw.cz>
10 void modbus_init(void);
11 void modbus_loop(void);
13 // If a call-back wants to signal a slave error in the reply
14 void modbus_slave_error(void);
18 bool modbus_check_discrete_input(u16 addr);
19 bool modbus_get_discrete_input(u16 addr);
21 bool modbus_check_coil(u16 addr);
22 bool modbus_get_coil(u16 addr);
23 void modbus_set_coil(u16 addr, bool value);
25 bool modbus_check_input_register(u16 addr);
26 u16 modbus_get_input_register(u16 addr);
28 bool modbus_check_holding_register(u16 addr);
29 u16 modbus_get_holding_register(u16 addr);
30 void modbus_set_holding_register(u16 addr, u16 value);
32 void modbus_ready_hook(void);
33 void modbus_frame_start_hook(void);
35 enum modbus_id_object {
36 MODBUS_ID_VENDOR_NAME, // first three must be always defined
37 MODBUS_ID_PRODUCT_CODE,
38 MODBUS_ID_MAJOR_MINOR_REVISION,
39 MODBUS_ID_VENDOR_URL, // the rest may be NULL
40 MODBUS_ID_PRODUCT_NAME,
41 MODBUS_ID_USER_APP_NAME,
45 extern const char * const modbus_id_strings[MODBUS_ID_MAX];