- Ask a related questionWhat is a related question?A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
Hi - i have a crazy question. First, i am implementing EtherCAT on the F28379D and am using the TMDSECATCNCD379D reference design. I am using the SPI interface. Everything is working fine (CoE, FoE, process data transfers - no issues).
But i ran into a byte vs word problem which got me looking at the memcpy function implemented in the C28xxsystem.c file. The function is called c28xx_memcpy(s1, s2, n) and is setup to copy n bytes from s2 into s1. But the <string.h> memcpy function works on 16-bit words. So the c28xx_memcpy function simply calls memcpy with n divided by 2. And, in my mind, this should work fine except when n is odd.
So, assuming i am right, is TI assuming n is always even? And if so, how is that guaranteed?
I also checked in the ..\libraries\communications\EtherCat\f2838x\ssc_configuration\cpu1\f2838x_cpu1_system.c file and noted it uses the same logic.
Thanks for you help!
Brett
