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ZBasic System Library
137
ZX Microcontroller Family
InputCapture
Type
Subroutine
Invocation
InputCapture(data, count, flags)
InputCapture(data, count, flags, timeout)
Parameter
Method
Type
Description
data
ByRef
array of
UnsignedInteger
The array in which pulse width information will be stored.
count
ByVal
int16
The number of pulse widths to store. This should be no
larger than the number of entries in the passed array.
flags
ByVal
Byte
A value of zero requests that a falling edge begin the
capture process while a value of 1 indicates a rising edge.
All other values are reserved.
timeout
ByVal
Integral
If non-zero, this parameter specifies a timeout value that, if
exceeded, will terminate the input capture process.
Discussion
Invoking this routine is equivalent to the call InputCaptureEx(pin, data, count, flags) or
InputCaptureEx(pin, data, count, flags, timeout) where pin is the default input capture
pin for the device as shown in the table below. See the description of InputCaptureEx() for more detailed
information.
Default Input Capture Pin
ZX Models
Pin
ZX-24, ZX-24a, ZX-24p, ZX-24n, ZX-24r, ZX-24s
12, D.6
ZX-40, ZX-40a, ZX-40p, ZX-40n, ZX-40r, ZX-40s
20, D.6
ZX-44, ZX-44a, ZX-44p, ZX-44n, ZX-44r, ZX-44s
15, D.6
ZX-24e, ZX-24ae, ZX-24ne, ZX-24pe, ZX-24nu, ZX-24pu, ZX-24ru, ZX-24su
14, D.6
ZX-328n, ZX-328l
14, B.0
ZX-32n, ZX-32l
12, B.0
ZX-1281, ZX-1281n
29, D.4
ZX-1280, ZX-1280n
47, D.4
ZX-24x, ZX-24xu
12, C.0
ZX-32a4
10, C.0
ZX-128a1
15, C.0
ZX-128e, ZX-128ne, ZX-1281e, ZX-1281ne
8, D.4
ZX-328nu
11, B.0
Example
Dim pd(1 to 5) as UnsignedInteger
Call PutPin(12, zxInputTriState)
Call InputCapture(pd, UBound(pd), 1)
Compatibility
The BasicX compiler erroneously allows any variable for the first parameter. This implementation
requires the data type to be UnsignedInteger or Integer although it needn’t be an array. For
practical purposes, an array will almost always be used.
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