• VacNitro

VacNitro is a statecode program that runs on c1vac1. The program continuously reads the nitrogen pressure over a serial line from an OMEGA DPiS32 dac. The main loop of the program is:

ss VacNitro {

        state init {

                when(1) {

%%                      fd=open("/tyCo/1", O_CREAT | O_RDWR, 0666);
%%                      if(fd==ERROR)
%%                              printf("Error: Cannot open device /tyCo/1\n");
%%                      resetChannel(1);
%%                      initChannel(1);
%%                      ioctl(fd,FIOFLUSH,0);
%%                      taskDelay(100);
                } state cycle
        
        state cycle {
                when(delay(1)) {
%%                      fdprintf(fd,"*X01\r\n");
%%                      taskDelay(15);
%%                      buf=serialRead(fd);
%%                      N2pres=serialConvert(buf);
%%                      if(N2pres > 0.0)
                                pvPut(N2pres);
                } state cycle
        }
}

The "*X01" is the OMEGA "i-Series" command to send the current data value in decimal.

In the initChannel portion of the program, it is evident that the expected serial parameters are 9600 baud, 7 data bits, odd parity, 1 stop bit.