On STM32H753, is it possible to disable Ethernet MAC source address replacement?
I am working on a project that requires packet bridging, and I am stuck by the MAC altering the source address of bridged packets!
Reference manual section 58.5.2 discusses source address insertion/replacement. It refers to register MACCR, bits SARC. But the definition for these bits does not have an option to disable the MAC from overwriting the source address in my packets.
Edit: I tried setting SARC bits to all zero and it seems to disable address replacement. But this is not documented. It appears bit 28 selects insert/replace, bit 30 selects address 0/1 and bit 29 enables/disables address insertion. Does anybody have arms into ST to confirm if this is indeed the case?
Edit: STM32H7 HAL driver for Ethernet seems to offer a disable option for source MAC replacement, so maybe it is a thing.
/** @defgroup ETH_Source_Addr_Control ETH Source Addr Control
* @{
*/
#define ETH_SOURCEADDRESS_DISABLE 0x00000000U
#define ETH_SOURCEADDRESS_INSERT_ADDR0 ETH_MACCR_SARC_INSADDR0
#define ETH_SOURCEADDRESS_INSERT_ADDR1 ETH_MACCR_SARC_INSADDR1
#define ETH_SOURCEADDRESS_REPLACE_ADDR0 ETH_MACCR_SARC_REPADDR0
#define ETH_SOURCEADDRESS_REPLACE_ADDR1 ETH_MACCR_SARC_REPADDR1
/**
