Point Grey Flea3 GigE Technical Reference
E Control and Status Registers
E.5
GPIO_XTRA_PIN: 1114h-1144h
These registers contain mode specific data for the GPIO pins. Units are ticks of a 1.024MHz clock.
Pin
Register
0
GPIO_XTRA_PIN_0
1114h
1
GPIO_XTRA_PIN_1
1124h
2
GPIO_XTRA_PIN_2
1134h
3
GPIO_XTRA_PIN_3
1144h
Field
Bit
Description
Mode_Specific_1
[0-15]
GPIO_MODE_4: Low period of PWM pulse (if Pwm_Pol = 0)
Mode_Specific_2
[16-31]
GPIO_MODE_4: High period of PWM pulse (if Pwm_Pol = 0)
Format:
E.6
TRIGGER_MODE: 830h
Control of the register is via the
ON_OFF
bit and the
Trigger_Mode
and
Parameter
fields.
Field
Bit
Description
Presence_Inq
[0]
Presence of this feature
0: Not Available, 1: Available
Abs_Control
[1]
Absolute value control
0: Control with the Value field, 1: Control with the Absolute value CSR.
If this bit = 1, the value in the Value field is read-only.
[2-5]
Reserved
ON_OFF
[6]
Read: read a status
Write: ON or OFF for this feature
0: OFF, 1: ON
If this bit = 0, other fields will be read only
Trigger_Polarity
[7]
Select trigger polarity (except for Software_Trigger)
0: Trigger active low, 1: Trigger active high
Trigger_Source
[8-10]
Select trigger source: used to select which GPIO pin will be used for external trigger purposes.
Sets trigger source ID from
Trigger_Source_Inq
field of TRIGGER_INQ register.
Trigger_Value
[11]
Trigger input raw signal value: used to determine the current raw signal value on the pin.
Read only
0: Low, 1: High
[8-11]
Reserved
Format
Revised 10/29/2013
Copyright ©2010-2013 Point Grey Research Inc.
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