Hi everyone I am working on SSP (simple serial protocol) and I'm trying to test the code in the attached picture using only one Arduino any help how can I do this
TIA 
By typing it in. We want to see your sketch, in code tags please. If you want to run something only once, put it in setup().
Put that code in s function that takes arguments char * bufp and int len and returns unsigned short. Calculate CRC and return the value. Pass the function various known patterns and check that the value returned is what you expect.
#define POLY 0x8408 /* bits reversed for LSB-first */
unsigned short crc = 0xffff;
while (len-- > 0)
{
unsigned char ch = *bufp++;
for (i = 0; i < 8; i++)
{
crc = (crc >> 1) ˆ ( ((ch ˆ crc) & 0x01) ? POLY : 0 ); ch >>= 1;
}
}
that is the code can you illustrate more please thanks alot
Is this a school assignment? AVR C++ has built in CRC functions that you can use.
#include <util/crc16.h>
uint16_t make_crc(uint8_t* sourceArray, uint8_t arraySize)
{
 uint16_t crc = 0;
 for (uint8_t i = 0; i < arraySize; i++)
 {
  crc = _crc16_update(crc, sourceArray[i]);
 }
 return crc;
}
aarg:
Is this a school assignment? AVR C++ has built in CRC functions that you can use.#include <util/crc16.h>
uint16_t make_crc(uint8_t* sourceArray, uint8_t arraySize)
{
uint16_t crc = 0;
for (uint8_t i = 0; i < arraySize; i++)
{
crc = _crc16_update(crc, sourceArray[i]);
}
return crc;
}
not school assignment no university project and my supervisor wants it to be tested using Arduino
thank you
The example I posted shows you how to follow John Wasser's advice.
aarg:
The example I posted shows you how to follow John Wasser's advice.
yes thanks a lot