Ocean Optics NeoFox Engineering Note - Manual (Page 25)

NeoFox Communication Interfaces
013-20000-010-04-201211 25
RS-232 Pins
GPIO Connector (as viewed looking towards the back of the NeoFox unit with the graphic label down and
the power jack to the left of the connector
It is important to note that the device will disable RS232 communications in certain conditions:
• When the RS232 enable parameter is set to 0.
• When the USB connector is plugged in (as detected by the presence of the 5V USB power line)
RS232 Parameters
RS232 Divisor Latch short 0 < X < 10000 78
NEOFOX_RS232_DIVISOR_LATCH DeviceSetParameter DeviceGetParameter
Baud Rate = 12,000,000 / (16 * Divisor Latch) * (Multiply Value / [ Multiply Value + Divisor Add value])
RS232 Divisor Add Value
unsigned char 0 < X < 256 79
NEOFOX_RS232_DIVADDVAL DeviceSetParameter DeviceGetParameter
Baud Rate = 12,000,000 / (16 * Divisor Latch) * (Multiply Value / [ Multiply Value + Divisor Add value])
RS232 Multiply Value
unsigned char 0 < X < 256 80
NEOFOX_RS232_MULVAL DeviceSetParameter DeviceGetParameter
Baud Rate = 12,000,000 / (16 * Divisor Latch) * (Multiply Value / [ Multiply Value + Divisor Add value])
RS232 Enable
unsigned char 0, 1 96
NEOFOX_RS232_ENABLE DeviceSetParameter DeviceGetParameter
This value determines whether or not RS232 communications will be enabled when the USB cable is not present. Its
presence is determined by the presence of the 5V USB power line.
Value Description
0
RS232 is disabled.
1 RS232 will be enabled when the USB connector is not plugged in