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only: lua lib huh

This commit is contained in:
rusefillc 2024-02-15 16:14:54 -05:00
parent 0c817596cc
commit dfc400440c
1 changed files with 18 additions and 1 deletions
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19
firmware/controllers/lua/lua_lib.h
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@ -107,7 +107,7 @@ function getBitRange(data, bitIndex, bitWidth) \n\
return (value >> shift) & mask \n\ return (value >> shift) & mask \n\
end \n\ end \n\
" "
// todo: do we have a defect with indexing here?!
#define GET_BIT_RANGE_MSB " \ #define GET_BIT_RANGE_MSB " \
function getBitRangeMsb(data, bitIndex, bitWidth) \n\ function getBitRangeMsb(data, bitIndex, bitWidth) \n\
local byteIndex = bitIndex >> 3 \n\ local byteIndex = bitIndex >> 3 \n\
@ -138,6 +138,23 @@ function setBitRange(data, totalBitIndex, bitWidth, value) \
end \n\ end \n\
" "
#define SET_BIT_RANGE_MSB " \
function setBitRangeMsb(data, totalBitIndex, bitWidth, value) \
local byteIndex = totalBitIndex >> 3 \
local bitInByteIndex = totalBitIndex - byteIndex * 8 \
if (bitInByteIndex + bitWidth > 8) then \
local bitsToHandleNow = 8 - bitInByteIndex \
setBitRange(data, totalBitIndex + bitsToHandleNow, bitWidth - bitsToHandleNow, value >> bitsToHandleNow) \
bitWidth = bitsToHandleNow \
end \
local mask = (1 << bitWidth) - 1 \
data[1 + byteIndex] = data[1 + byteIndex] & (~(mask << bitInByteIndex)) \
local maskedValue = value & mask \
local shiftedValue = maskedValue << bitInByteIndex \
data[1 + byteIndex] = data[1 + byteIndex] | shiftedValue \
end \n\
"
#define HYUNDAI_SUM_NIBBLES "\ #define HYUNDAI_SUM_NIBBLES "\
function hyundaiSumNibbles(data, seed) \n\ function hyundaiSumNibbles(data, seed) \n\
local sum = seed \n\ local sum = seed \n\