PulsePort (Toggle Port State)
The PulsePort instruction is used to toggle the state of a port, delay, and then toggle the port again.
Syntax
PulsePort (Port, Delay )
Example
The following program shows the use of the PulsePort instruction to measure 10 thermocouples attached to an AM16/32 multiplexer.
'CR1000X
'Declare Variables and Units
Dim LCount_4
Public Batt_Volt
Public RefTemp
Public Temp_C(10)
Units Batt_Volt=Volts
Units RefTemp=Deg C
Units Temp_C=Deg C
'Define Data Tables
DataTable(Table1,True,-1)
DataInterval(0,60,Min,0)
Sample(10,Temp_C(1),FP2)
EndTable
'Main Program
BeginProg
Scan(30,Sec,1,0)
'Default Datalogger Battery
Voltage measurement Batt_Volt:
Battery(Batt_Volt)
'107 Temperature Probe
measurement RefTemp:
'Turn AM16/32 Multiplexer
On
PortSet(C1,1)
LCount_4=1
SubScan(0,uSec,10)
'Switch to next AM16/32
Multiplexer channel
PulsePort(C2,10000)
'Type T (copper-constantan) Thermocouple measurements Temp_C on the AM16/32Multiplexer:
LCount_4=LCount_4+1
NextSubScan
'Turn AM16/32 Multiplexer
Off
PortSet(C1,0)
'Call Data Table and Store
Data
CallTable(Table1)
NextScan
EndProg
Remarks
This instruction toggles a port, delays the specified amount of time, toggles the port, and then delays a second time. The second delay in the instruction allows it to be used to create a 50 percent duty cycle clock for clocking multiplexers.
Parameters
Port
The number of the port to use in this instruction. An alphanumeric code is entered. Right-click to display a list.
| Code | Description |
|---|---|
| C1 | Control terminal 1 |
| C2 | Control terminal 2 |
| C3 | Control terminal 3 |
| C4 | Control terminal 4 |
| C5 | Control terminal 5 |
| C6 | Control terminal 6 |
| C7 | Control terminal 7 |
| C8 | Control terminal 8 |
Type: Constant
Delay
The amount of time, in microseconds, to delay after toggling the port. The delay is used after both the first and second toggles of the port.
Type: Constant