Allied Vision Technologies Pike Manual de Instruções descarregar pdf (Página 172)

Description of the data path

PIKE Technical Manual V4.0.0

172

To read data:

1. Query RDRD flag (buffer ready?) and write the number of bytes the host

wants to read to RBUF_CNT.

2. Read the number of bytes pending in the receive buffer RBUF_ST (more

data in the buffer than the host wanted to read?) and the number of

bytes left for reading from the receive FiFo in RBUF_CNT (host wanted

to read more data than were in the buffer?).

3. Read received characters from SIO_DATA_REGISTER, beginning at char 0.

4. To input more characters, repeat from step 1.

To write data:

1. Query TDRD flag (buffer ready?) and write the number of bytes to send

(copied from SIO register to transmit FiFo) to TBUF_CNT.

2. Read the available data space left in TBUF_ST (if the buffer can hold

more bytes than are to be transmitted) and number of bytes written to

transmit buffer in TBUF_CNT (if more data is to be transmitted than fits

in the buffer).

3. Write character to SIO_DATA_REGISTER, beginning at char 0.

4. To output more characters, repeat from step 1.

Note

• Contact your local dealer if you require further informa-

tion or additional test programs or software.

• AVT recommends the use of Hyperterminal™ or other

communication programs to test the functionality of

this feature. Alternatively use SmartView to try out this

feature.

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Allied Vision Technologies Pike Manual de Instruções Página 172