ALLIED Vision Technologies Guppy PRO F-503 - Manual (Page 87)

Camera interfaces
Guppy PRO Technical Manual V4.0.0
85
Pulse-width modulation
The 1 input and 3 outputs are independent. Each output has pulse-width
modulation (PWM) capabilities, which can be used (with additional external
electronics) for motorized speed control or autofocus control.
Period (in µs) and pulse width (in µs) are adjustable via the following regis-
ters (see also examples in Chapter
PWM: Examples in practice on page 87):
To enable the PWM feature select output mode 0x09. Control the signal state
via the PulseWidth and Period fields (all times in microseconds (µs)).
Note

• Note that trigger delay in fact delays the image cap-
ture whereas the IntEna_Delay only delays the leading
edge of the IntEna output signal but does not delay the
image capture.
• As mentioned before, it is possible to set the outputs
by software. Doing so, the achievable maximum fre-
quency is strongly dependent on individual software
capabilities. As a rule of thumb, the camera itself will
limit the toggle frequency to not more than 700 Hz.
Register Name Field Bit Description
0xF1000800 IO_OUTP_PWM1 Presence_Inq [0] Indicates presence of this
feature (read only)
--- [1] Reserved
--- [2..3] Reserved
MinPeriod [4..19] Minimum PWM period in µs
(read only)
--- [20..27] Reserved
--- [28..31] Reserved
0xF1000804 PulseWidth [0..15] PWM pulse width in µs
Period [16..31] PWM period in µs
0xF1000808 IO_OUTP_PWM2 Same as
IO_OUTP_PWM1
0xF100080C
0xF1000810 IO_OUTP_PWM3 Same as
IO_OUTP_PWM1
0xF1000814
0xF1000818 IO_OUTP_PWM4 Same as
IO_OUTP_PWM1
0xF100081C
Table 31: PWM configuration registers