WebHMI Docs

User Tools

Site Tools

useful_programs

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
Next revisionBoth sides next revision
useful_programs [2019/06/20 11:20] – [Detecting rise / fall edge of the signals] emozolyakuseful_programs [2020/01/13 10:17] – [Debug printing] emozolyak
Line 22: Line 22:
 To access idividual bits, you can use following handy functions: To access idividual bits, you can use following handy functions:
 <code lua> <code lua>
--- to check, set,clear individual bits in numbers 
 function bw(n) function bw(n)
   return 2 ^ (n - 1)  -- returns weight of the bit in pos. n   return 2 ^ (n - 1)  -- returns weight of the bit in pos. n
 end end
- +  
-function hasbit(x, p) +function hasbit(x, b)  
-  return x % (p + p) >= p  -- returns if p is true/false; if hasbit(value, bw(2)) then ...+  local p = bw(b) 
 +  return x % (p + p) >= p  -- returns if b is true/false; if hasbit(value, b) then ...
 end end
- +  
-function setbit(x, p) +function setbit(x, b)  
-  return hasbit(x, p) and x or x + p -- sets bit #p in х example:  х = setbit(х, bit(p))+  return hasbit(x, b) and x or x + bw(b) -- sets bit b in х example:  х = setbit(х, b))
 end end
- +  
-function clearbit(x, p) +function clearbit(x, b) 
-  return hasbit(x, p) and x - p or x --  clears bit #p in х +  return hasbit(x, b) and x - bw(b) or x --  clears bit b in х 
 end end
- +  
-function togglebit(x, b) -- toggles bit #b in x  +function togglebit(x, b) -- toggles bit b in x  
-    local r  +    if hasbit(x, b) then  
-     +        return clearbit(x, b)
-    if hasbit(x,bw(b)) then  +
-        r = clearbit(x, bw(b))+
     else      else 
-        r = setbit(x, bw(b))+        return setbit(x, b)
     end      end 
-    return r  
 end  end 
- +  
--- output bool conditoin as 0 /1 into a bit  +function outbit(condition, x, b) -- output bool condition as 0 /1 into a bit  
-function outbit(x, p, condition) +     if condition then      
-     if condition   then      +         return hasbit(x, b) and x or x + bw(b) 
-         return hasbit(x, p) and x or x + p -- sets bit #p in х example:  х = setbit(х, bw(p))+
      else       else 
-         return hasbit(x, p) and x - p or x --  clears bit #p in х      +         return hasbit(x, b) and x - bw(b) or x 
      end       end 
 end  end 
  
--- uses alias and sets bit in it  +function outBit(condition, alias, b) -- output bool condition as 0 /1 into a bit of a internal register  
-function setBit(alias, b) +     local new_value = outbit(condition, R(alias), b) 
-    local value = R(alias) +     W(alias, new_value)
-    value = setbit(value, bw(b)) +
-    W(alias, value)+
 end  end 
 + 
 +function setBit(alias, b) -- sets bit in the register using alias or id   
 +    local old_value = R(alias) 
 +    local new_value = setbit(old_value, b) 
  
--- uses alias and crears bit in it  +    if (new_value ~= old_value) then  
-function clearBit(alias, b) +        WriteReg(alias, new_value)  -- to prevent unnecessary writing 
-    local value = R(alias) +    end 
-    value = clearbit(value, bw(b)) +
-    W(alias, value)+
 end  end 
  
 +function clearBit(alias, b) -- uses alias or id and crears bit in it 
 +    
 +    local old_value = R(alias)
 +    local new_value = clearbit(old_value, b)
 +    
 +    if (new_value ~= old_value) then 
 +        WriteReg(alias, new_value)
 +    end 
 +end 
 +
 +function toggleBit(alias, b) -- toggles bit b in reg by alias or id 
 +     local cur_value = R(alias)
 +    
 +    if hasbit(cur_value, b) then 
 +        clearBit(alias, b)
 +    else 
 +        setBit(alias, b)
 +    end 
 +    return true 
 +end 
 + 
 -- return bit from the position as a  1 / 0  -- return bit from the position as a  1 / 0 
-function getBit(x, p) +function getBit(alias, b) 
-    if hasbit ( x , p) then +     
 +    if hasbit(R(alias), b) then 
         return 1          return 1 
     else      else 
Line 122: Line 140:
  
 <code lua> <code lua>
-function DBG ( ... ) +function DBG(...) 
-            -- ... means variable number of arguments in lua, passed in the 'arg' table+local tc = tabToStr
  
-if ENABLE_DEBUG then -- should be global in the calling script +local function align2s(s1, s2) -- appends space to smaller string  
 +    local d, s = (#s1 - #s2), ' '  
 +    if (d ~= 0) then return (((d > 0) and {s1, s2 .. s:rep(d)}) or ({s1 .. s:rep(math.abs(d)), s2})) 
 +    else  
 +        return {s1, s2} 
 +    end  
 +end  
 + 
 +    if ENABLE_DEBUG then  
 +        local arg_str = tc(arg) 
 +        local t_s_pos = string.find(arg_str, "|") 
          
-    local s = ""            -- string buffer to concatenate all arguments +        if not t_s_pos then  
-        for i = 1 , #arg do  +            INFO(arg_str)  -- Just printing single line  
-        -- glue all and add spaces, use tostring to protect from nil argument  +        else  
-            s = s .. tostring ( arg [i]  ) .. ' '  +            local h_row, v_row = {}, {}  
-        end  +            -- header  
-    DEBUG ( s ) +            for w in string.gmatch(arg[1], "%S+") do 
-end -- if +                h_row[#h_row + 1] = w       
 +            end  
 +            -- values  
 +            for i = 3, #arg do  
 +                v_row[#v_row + 1] = tostring(arg[i]) 
 +            end  
 +             
 +            if (#h_row ~= #v_row) then  
 +                ERROR("Inconsistent header and value rows in DBGnew!") 
 +                return  
 +            else  
 +                for g = 1, #h_row do  
 +                    h_row[g], v_row[g] = unpack(align2s(h_row[g], v_row[g])) 
 +                end  
 +            end  
 +            INFO(tc(h_row)) ; INFO(tc(v_row)) 
 +        end     
 +    end  
 +end   
 + 
 +function tabToStr(t)  -- glue all and add spaces, use tostring to protect from nil and bool argument  
 +    local s = ""             
 +    for i = 1, #t do  
 +        local e = t[i] ; if (e == nil) then e = 'nil' end  
 +        s = s .. tostring(e) .. ' '  
 +    end -- for  
 +    return s  
 +end
  
-end -- DBG  
 </code> </code>
 +Then the print output can be enhanced like this:
 +{{ :dbg_table_out.png?direct&600 |}}
  
 The //ENABLE_DEBUG// flag should be global boolean variable in the calling script. You may just to set it when needed and save the script.  The //ENABLE_DEBUG// flag should be global boolean variable in the calling script. You may just to set it when needed and save the script. 
Line 210: Line 266:
  
 <code lua> <code lua>
- function Timer (bool_input, onDelay, offDelay, tmrAlias)+function Timer (bool_input, onDelay, offDelay, tmrAlias)
 --                bool      sec to ON  sec to OFF  string alias --                bool      sec to ON  sec to OFF  string alias
 + 
 +local now , nowString, curTimeStamp, curTmrState =  
 +os.time(), os.date("%c", now), R(tmrAlias), TRUE(tmrAlias .."_out")     
  
-local now , nowString, curTimeStamp, curTmrState =  os.time(),  +    DBG("Timer State Stamp", "|", tmrAlias, curTmrState, os.date("%c", curTimeStamp)) 
-                                                    os.date("%c", now),  +
-                                                    R(tmrAlias), +
-                                                    TRUE(tmrAlias .."_out")      +
-                                           +
-DEBUG("curTimeStamp - ", os.date("%c", curTimeStamp) ) +
-DEBUG ("cur "..tmrAlias.." State =  "..tostring(curTmrState))                  +
 -- protects from malfunctions on very first run  -- protects from malfunctions on very first run 
 if curTimeStamp == 0 then  if curTimeStamp == 0 then 
-    DEBUG("curTimeStamp was zero in this timer!")+    DBG("curTimeStamp was zero in this timer!")
     WriteReg(tmrAlias, now)     WriteReg(tmrAlias, now)
     return nil, 0 -- countdown      return nil, 0 -- countdown 
 end  end 
 + 
 +    -- in and output are equal                                                     
  
-    -- in and output are equal                                                      +if (bool_input == curTmrState) then  
-    if (bool_input == curTmrState) then  +        WriteReg(tmrAlias, now) ; DBG("timer inputs match") 
-        WriteReg(tmrAlias, now)                           DEBUG("timer input match state ") +
         return curTmrState, 0   -- as bool          return curTmrState, 0   -- as bool 
-     +         
-    -- TON      +                            -- TON      
-    elseif bool_input then  +elseif bool_input then  
-         if ((now - GetReg(tmrAlias)) > onDelay) then  +         if ((now - curTimeStamp) > onDelay) then  
-             WriteReg(tmrAlias .."_out", 1)  +             SET(tmrAlias .."_out") ; WriteReg(tmrAlias, now) ; DBG("detected ON state after delay")
-                                                        DEBUG("detected ON state after delay (input, now, tmr, onDelay ):", bool_input, nowString, onDelay)+
              return true, 0                return true, 0  
         else          else 
-            local countDown = onDelay - (now - curTimeStamp) +            local countDown = onDelay - (now - curTimeStamp) ; DBG("countdown to On in ", countDown)
-            DEBUG("countdown to On in " .. tmrAlias .. " ".. countDown)+
             return curTmrState, countDown             return curTmrState, countDown
         end          end 
 + 
 +                            -- TOFF     
 +elseif not bool_input then 
          
-    -- TOFF      +        if ((now - curTimeStamp) > offDelay) then    
-    elseif not bool_input then  +            RESET(tmrAlias .."_out") ; WriteReg (tmrAlias, now) ; DBG("detected OFF state after delay") 
-        if (now - GetReg ( tmrAlias ) > offDelay) then    +            return false, 0   
-            WriteReg (tmrAlias .."_out", 0) +
-            DEBUG("detected OFF state after delay (input, now, tmr, offDelay ):", bool_input, nowString, offDelay) +
-            return false  +
         else          else 
-            local countDown = offDelay - (now - curTimeStamp) +            local countDown = offDelay - (now - curTimeStamp) ; DBG("countdown to OFF in ", countDown)
-            DEBUG ("countdown to OFF in " .. tmrAlias .." ".. countDown)+
             return curTmrState, countDown             return curTmrState, countDown
         end          end 
useful_programs.txt · Last modified: 2024/05/27 13:23 by emozolyak
Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki