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#include "manchester.h"
// G. E. Thomas Manchester decoder
uint8_t manchester_decode(uint8_t partOne, uint8_t partTwo)
{
uint8_t data = 0x00;
uint8_t temp = 0x00;
uint8_t bitCount = 0, bitOneCount = 0, bitTwoCount = 0, bitByOneCount = 1, bitByTwoCount = 1, firstHalfCount = 0;
while (bitCount != 8)
{
if (firstHalfCount <= 6)
{
temp |= ((partOne >> (bitOneCount + bitByOneCount)) & 0x01);
if (temp == 0x01)
{
data |= (temp << bitCount);
}
if (temp == 0x00)
{
data |= (temp << bitCount);
}
bitCount++;
bitOneCount++;
bitByOneCount++;
}
else
{
temp |= ((partTwo >> (bitTwoCount + bitByTwoCount)) & 0x01);
if (temp == 0x01)
{
data |= (temp << bitCount);
}
if (temp == 0x00)
{
data |= (temp << bitCount);
}
bitCount++;
bitTwoCount++;
bitByTwoCount++;
}
firstHalfCount = firstHalfCount + 2;
temp = 0x00;
}
return data;
}
int manchesterDecoder(uint8_t *in, int length, uint8_t *out)
{
for (int i = 0; i < length; i += 2)
{
out[i / 2] = manchester_decode(in[i + 1], in[i]);
}
return length / 2;
}
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