This example shows how to setup pulse counter module, read timer and pulse counter values. You can find the complete example in the “..\Program Files\Diolan\DLN\examples\c_cpp\examples\ simple
” folder after DLN setup package installation.
#include "..\..\..\common\dln_generic.h" #include "..\..\..\common\dln_pls_cnt.h" #pragma comment(lib, "..\\..\\..\\bin\\dln.lib") int _tmain(int argc, _TCHAR* argv[]) { // Open device HDLN device; DlnOpenUsbDevice(&device); // Set Free Run mode DlnPlsCntSetMode(device, 0, DLN_PLS_CNT_MODE_FREE_RUN, 0); // Enable counter uint16_t conflict; DlnPlsCntEnable(device, 0, &conflict); // Do some delay for (int i = 0; i < 10000; i++); // Read counter values uint32_t timerValue, counterValue; DlnPlsCntGetValue(device, 0, &timerValue, &counterValue); printf("Timer Value = %u, Counter Value = %u\n", timerValue, counterValue); // Close device DlnCloseHandle(device); return 0; }
Line 1:#include "..\..\..\common\dln_generic.h"
The dln_generic..h
header file declares functions and data structures for the generic interface. In current example this header is used to call DlnOpenUsbDevice() and DlnCloseHandle() functions.
Line 2:#include "..\..\..\common\dln_pls_cnt.h"
The dln_pwm.h header file declares functions and data structures for the PWM interface. In current example this header is used to call DlnPlsCntSetMode(), DlnPlsCntEnable(), DlnPlsCntGetValue() functions.
Line 3:#pragma comment(lib, "..\\..\\..\\bin\\dln.lib")
Use dln.lib
library while project linking.
Line 10:DlnOpenUsbDevice(&device);
The function establishes the connection with the DLN adapter. This application uses the USB connectivity of the adapter. For additional options, refer to the Device Opening & Identification section.
Line 13:DlnPlsCntSetMode(device, 0, DLN_PLS_CNT_MODE_FREE_RUN, 0);
The function sets pulse counter mode to “Free run mode”. You can read more about pulse counter modes at Pulse Counter Modes section.
Line 16:DlnPlsCntEnable(device, 0, &conflict);
The function enables pulse counter module.
Line 19:for (int i = 0; i < 10000; i++);
Performing delay for more continuous mode of counter.
Line 23:DlnPlsCntGetValue(device, 0, &timerValue, &counterValue);
The function retrieves timer and pulse counter values.
Line 24:printf("Timer Value = %u, Counter Value = %u\n", timerValue, counterValue);
Printing retrieved timer and pulse counter values to console.
Line 27:DlnCloseHandle(device);
The application closes handle to the DLN adapter.