sub_rs_timing

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Synopsis

int sub_rs_timing( sub_handle hndl, int flags, int tx_space_us,

int rx_msg_us, int rx_byte_us )

Configure UART transfer timing and order of transmit and receive operations. Actual transfer is initiated by sub_rx_xfer function.

Parameters

•flags - one or none of the below flags:

RS_RX_BEFORE_TX	Receive message and after that transmit message
RS_RX_AFTER_TX	Transmit message and after that receive message
none	Receive and transmit simultaneously

•tx_space_us - delay in µs between subsequent byte transmit

•rx_msg_us - message reception timeout in µs

•rx_byte_us - byte to byte reception timeout in µs

Delay and timeouts precision is ± 64 µs. They should not exceed 4.000.000µs = 4s.

Following table explains relation between rx_msg_us and rx_byte_us parameters

rx_msg_us=0	rx_byte_us=0	Message reception will last no more then 4s
rx_msg_us=0	rx_byte_us>0	First byte reception will last no more then 4s. Every next byte should be received in rx_byte_us time
rx_msg_us>0	rx_byte_us=0	Message reception will last no more then rx_msg_us time
rx_msg_us>0	rx_byte_us>0	First byte reception will last no more then rx_msg_us time. Every next byte should be received in rx_byte_us time

Return value

On success function returns 0. Otherwise error code.

Example

/* Request message transmit and after that receipt */

/* No space between transmitted bytes */

/* Message should be received in 1s */

sub_rs_timing( hndl, RS_RX_AFTER_TX, 0, 1000000, 0 );