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Function that allows writing to a display.

Depending on the control used, writing occurs on different displays. With an RP-2 control this function writes to the 4x20 display built into the control. With other control models, writing takes place on the dispan module, if one is connected to the control.

Syntax

i32 write_dis (string str [, i32 len=40] [, i32 offset=0])

str

String to be displayed

len

Number of characters to display. (optional, default 40)

offset

Start of buffer. (optional, default 0)

Result

Returns:

Value

Meaning

<> 0

Successful writing

0

Failed

Validity

Rule, Task

Note

The last two lines of the display are handled by RTE via appropriate menus. Act on the predefined variable dis_display to limit/reduce these managements

Example of use:

; definitions of variables

STRING stringaRiga1, stringaRiga2

; we write on the first two lines of the display date and time

stringaRiga1 = "DATA : " # str_i(day, 2, 10) #"/"# str_i(month, 2, 10)  # "/"# str_i(year, 4, 10) # "   "

stringaRiga2 = "ORA  : " # str_i(hour, 2, 10)#"/"# str_i(minute, 2, 10) # "/"# str_i(second, 2, 10) # "     "

; I write the first string

write_dis(stringaRiga1,20,0)

; I write the second string

write_dis(stringaRiga2,20,20)

 

; you want to disable the display from RTE and clean it up

dis_display = 0xf

; I write an empty string of 40 characters

write_dis("                                        ", 40, 0)

 
  

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