29 lines
869 B
C
29 lines
869 B
C
#pragma once
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#include <osmocom/core/msgb.h>
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#include <osmocom/modbus/modbus_rtu.h>
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#include <osmocom/modbus/modbus_prim.h>
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struct osmo_modbus_conn_rtu {
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struct osmo_modbus_conn* conn; /* backpointer */
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char *dev_path;
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unsigned baudrate;
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struct osmo_fd ofd;
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struct msgb *rx_msg;
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bool rx_msg_ok; /* OK (true) or NOK (false) */ /* TODO: use msg->cb instead to store the OK/NOK */
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struct msgb *tx_msg;
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struct osmo_tdef *T_defs;
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struct osmo_fsm_inst *fi;
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};
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struct msgb* prim2rtu(struct osmo_modbus_prim *prim);
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int rtu2prim(struct osmo_modbus_conn_rtu* rtu, struct msgb* msg, struct osmo_modbus_prim **prim);
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/* 1 RTU char: start bit, 8 data bits, stop bit, and parity bit (or 2nd stop bit if no parity) */
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static inline unsigned long rtu_chars2bits(unsigned long num_chars) {
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return num_chars*11;
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}
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uint16_t crc16(uint8_t *buffer, uint16_t buffer_length);
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