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Description of the data path
8.16 Serial interface
With FW > 2.03, all Marlin cameras are equipped with the SIO (serial input/output) feature as
described in IIDC 1v31. This means that the Marlin’s serial interface which is used for firmware
upgrades can further be used as a general RS232 interface.
Data written to a specific address in the IEEE-1394 address range will be sent through the serial
interface. Incoming data of the serial interface is put in a camera buffer and can be polled via
simple read commands from this buffer. Controlling registers enable the settings of baud rates
and the check of buffer sizes and serial interface errors.
Note that hardware handshaking is not supported.
Note that typical PC hardware is not supporting 230400 bps.
Base address for the function is: F0F02100h. The following registers give an overview:
Offset
Name
Field
Bit
Description
000h
SERIAL_MODE_REG
Baud_Rate
[0..7]
Baud rate setting
WR: Set baud rate
RD: Read baud rate
0: 300 bps
1: 600 bps
2: 1200 bps
3: 2400 bps
4: 4800 bps
6: 19200 bps
9: 115200 bps
10: 230400 bps
Other values reserved
5: 9600 bps
7: 38400 bps
8: 57600 bps
h
[8..15]
Character
length
7: 7 bits
8: 8 bits
Other values reserved
Char_Lengt
setting
WR: Set data length
(7 or 8 bit)
RD: Get data length
Parity
[16..17] Parity
setting
e
2: Even
WR: Set parity
RD: Get parity setting
0: Non
1: Odd
Stop_Bit
[18..19] Stop
bits
WR: Set stop bit
MARLIN Technical Manual
Page 87
Содержание F-131B
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