Greetings,
I have been working on a project integrating Lua onto a Freescale Kinetis microcontroller. I have successfully created a simple shell that allows me to enter Lua statements (modeled after the shell shown in Programming in Lua).
I have written “C” functions to manage a Lua table that is to be used by a Lua script to pass parameters to a “C” function where the parameters are sent out a proprietary CAN stack. The Lua table is created from a “C” function before the first lua_pcall is called. Initially the table is as follows:
messagePayload =
{
isRelativeLevel = 0,
isFadeRate = 1,
isWaitForGo = 0,
isHighestTakePrecedence = 0,
priority = 8,
fade = 10,
channelListCount = 0,
Dimmers =
{
[0] = nil,
}
}
One of the functions that can be called from “C” adds dimmer/level pairs to the Dimmers table. For example, if the LuaScript called the “C” function with a dimmer number of 1 and a level of 128, the table would be modified as follows:
messagePayload =
{
isRelativeLevel = 0,
isFadeRate = 1,
isWaitForGo = 0,
isHighestTakePrecedence = 0,
priority = 8,
fade = 10,
channelListCount = 0,
Dimmers =
{
[0] = {dim = 1, lev = 128}
}
}
Additional dimmer/level pairs can be added.
My question is this; I would like to be able to modify the values of members of the table from Lua, but I do not want Lua to be able to change the members or structure of the table, only the “C” functions are allowed to do this. Is this possible?
Thanks,
Rick