# Module to find all current VISA-compatible devices.

#import visa_fake as v
import visa as v

## Use PyVisa to find all visa-compatible devices on usb, com, lpt, gpib connections
def FindVisaDevices(write_log=False) :
    logfile = "log_visa.txt"
    # a is list of strings, one per instrument.  Each string contains the connection, vendor id, model number and serial number.
    a = v.get_instruments_list()
    print('\nVISA devices found:')
    print(a)
    #print('\t' + '\n\t'.join(a))
    # Writing result of actions to a log file can be useful for trouble-shooting.
    if write_log :
        f = open(logfile, "w")   #Open a text file to record the output. The 'w' means "write".
        f.write('Result of search for VISA devices:')
        f.write('\n\t' + '\n\t'.join(a))      # '\t' is a tab and '\n' is a new line or linefeed (lf).
        f.close()       # Always close whatever you have opened.
        print('\n' + logfile + ' written.')
    return a

#-------------------------------------------------------------------------------

if __name__ == '__main__' :
    FindVisaDevices(write_log=True)