One transaction. More...

#include <hitec_wire.h>

Data Fields
uint8_t	kind
uint8_t	family
uint8_t	n_tx
uint8_t	gap_bits
uint8_t	tx [HITEC_TX_MAX]
uint8_t	max_rx
uint8_t	answer
uint8_t	answer_byte
uint8_t	level
uint32_t	lead_us
uint32_t	window_us
uint32_t	level_us

Detailed Description

One transaction.

Outside a transaction the driver leaves the pad an input: classic with a pull-down, D series with a pull-up.

SEND: the line rests at its idle level for lead_us (classic: released; D series: driven low, the inside-frame rest level), then the bytes go out with gap_bits idle bit times between two of them. Classic: the pad is released at the start of the last byte's stop bit, where the receiver starts. D series: the last stop bit is sent, the pad is released, and the receiver starts one bit time later (HITEC_D_SETTLE_BITS). With window_us 0 nothing is received.

LISTEN: the receiver starts at once. With answer set, the byte answer_byte goes out at the end of the stop bit of the first byte received.

The receiver runs until window_us of waiting for a start bit have passed or max_rx bytes have come. The time spent inside bytes and in the answer does not count against the window.

LEVEL: the line is held at level (0 low, 1 high) for level_us and then released. An open-drain line drives low only.

Field Documentation

◆ answer

uint8_t hitec_xfer_t::answer

LISTEN: 1 sends answer_byte

◆ answer_byte

uint8_t hitec_xfer_t::answer_byte

byte sent as the answer

◆ family

uint8_t hitec_xfer_t::family

hitec_family_t

◆ gap_bits

uint8_t hitec_xfer_t::gap_bits

SEND: 0 to HITEC_GAP_MAX

◆ kind

uint8_t hitec_xfer_t::kind

hitec_kind_t

◆ lead_us

uint32_t hitec_xfer_t::lead_us

SEND: 0 to HITEC_TIME_MAX_US

◆ level

uint8_t hitec_xfer_t::level

LEVEL: 0 or 1

◆ level_us

uint32_t hitec_xfer_t::level_us

LEVEL: 1 to HITEC_TIME_MAX_US

◆ max_rx

uint8_t hitec_xfer_t::max_rx

1 to HITEC_RX_MAX; 0 with no window

◆ n_tx

uint8_t hitec_xfer_t::n_tx

SEND: 1 to HITEC_TX_MAX

◆ tx

uint8_t hitec_xfer_t::tx[HITEC_TX_MAX]

bytes a SEND sends, in order

◆ window_us

uint32_t hitec_xfer_t::window_us

SEND, LISTEN: 0 to HITEC_TIME_MAX_US

The documentation for this struct was generated from the following file:

protocols/hitec/include/hitec_wire.h

Data Fields