IDEC OpenNet series User Manual

26: LONWORKS INTERFACE MODULE
OPENNET CONTROLLER USER’S MANUAL 26-21
Writing Receive Data to Data Registers in the LONWORKS Interface Module
The following diagram shows a typical example of writing receive data to the data registers in the LONWORKS interface
module.
Application Program Example for Data Write
The following program is an example to write receive data to data register C000h of the L
ONWORKS interface module
when an 8-bit input network variable (nv_i8) is updated. When you modify or create an application program, make sure
that the application program includes the following codes in italics.
1. /* Input Network Variables */
2. network input unsigned char nv_i8;
3. /* define */
4. #define GA_BCTL 0xC01A
5. #define BCTL_NWR_REQ 0x04
6. #define GA_FCDR_RX 0xC000
7.
8. when(nv_update_occurs(nv_i8)){ /* Acknowledge input network variable update */
9. unsigned char *pGA;
10. unsigned char dat;
11. while(TRUE){
12. pGA = (unsigned char *)GA_BCTL; /* Preparation for data write */
13. *pGA |= BCTL_NWR_REQ;
14. dat = *pGA;
15. if (dat & BCTL_NWR_REQ){ /* Preparation for data write complete */
16. pGA = (unsigned char *)GA_FCDR_RX;
17. pGA = nv_i8; /* Write input NV data to data register C000h */
18. pGA = (unsigned char *)GA_BCTL;
19. pGA &= ~BCTL_NWR_REQ; /* End data write */
20. break;
21. }
22. }
23. }
NO
YES
Is preparation for data
write complete?
Preparation for data write
Write data
End data write
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IDEC OpenNet series Specifications

General

Brand	IDEC
Model	OpenNet series
Category	Controller
Language	English