ex_modbus v0.1.1 ExModbus.Nerves.UART.Framing.Modbus

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Link to this section Summary

Functions

Add framing to the passed in data

This is called when the user invokes Nerves.UART.flush/2. Any partially received frames should be dropped

If remove_framing/2 returned :in_frame and a user-specified timeout for reassembling frames has elapsed, then this function is called. Depending on the semantics of the framing, a partial frame may be returned or the incomplete frame may be dropped

Initialize the state of the framer based on options passed to Nerves.UART.open/3

Remove the framing off received data. If a partial frame is left over at the end, then :in_frame should be returned. All of the frames received should be returned in the second tuple

Link to this section Functions

Link to this function add_framing(data, state)

Add framing to the passed in data.

The returned frame_data will be sent out the UART.

Callback implementation for Nerves.UART.Framing.add_framing/2.

Link to this function buffer_empty?(state)
Link to this function flush(direction, state)

This is called when the user invokes Nerves.UART.flush/2. Any partially received frames should be dropped.

Callback implementation for Nerves.UART.Framing.flush/2.

Link to this function frame_timeout(state)

If remove_framing/2 returned :in_frame and a user-specified timeout for reassembling frames has elapsed, then this function is called. Depending on the semantics of the framing, a partial frame may be returned or the incomplete frame may be dropped.

Callback implementation for Nerves.UART.Framing.frame_timeout/1.

Link to this function has_error?(state)

Initialize the state of the framer based on options passed to Nerves.UART.open/3.

This function should return the initial state for the framer or an error.

Callback implementation for Nerves.UART.Framing.init/1.

Link to this function remove_framing(data, state)

Remove the framing off received data. If a partial frame is left over at the end, then :in_frame should be returned. All of the frames received should be returned in the second tuple.

Callback implementation for Nerves.UART.Framing.remove_framing/2.