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[M487] support unique locally administered MAC address

pull/4608/head
cyliangtw 2017-03-09 20:55:41 +08:00 committed by ccli8
parent 898a4bb4bd
commit dae0a4c30c
1 changed files with 21 additions and 15 deletions
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36
features/FEATURE_LWIP/lwip-interface/lwip-eth/arch/TARGET_NUVOTON/TARGET_M480/m480_netif.c
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@ -100,36 +100,42 @@ struct ethernetif {
// Override mbed_mac_address of mbed_interface.c to provide ethernet devices with a semi-unique MAC address
void mbed_mac_address(char *mac)
{
unsigned char my_mac_addr[6] = {0x02, 0x00, 0xac, 0x55, 0x66, 0x88}; // default mac adderss
uint32_t uID1;
// Fetch word 0
uint32_t word0 = *(uint32_t *)0x7FFFC;
uint32_t word0 = *(uint32_t *)0x7F804; // 2KB Data Flash at 0x7F800
// Fetch word 1
// we only want bottom 16 bits of word1 (MAC bits 32-47)
// and bit 9 forced to 1, bit 8 forced to 0
// Locally administered MAC, reduced conflicts
// http://en.wikipedia.org/wiki/MAC_address
uint32_t word1 = *(uint32_t *)0x7FFF8;
if( word0 == 0xFFFFFFFF ) // Not burn any mac address at the last 2 words of flash
uint32_t word1 = *(uint32_t *)0x7F800; // 2KB Data Flash at 0x7F800
if( word0 == 0xFFFFFFFF ) // Not burn any mac address at 1st 2 words of Data Flash
{
mac[0] = my_mac_addr[0];
mac[1] = my_mac_addr[1];
mac[2] = my_mac_addr[2];
mac[3] = my_mac_addr[3];
mac[4] = my_mac_addr[4];
mac[5] = my_mac_addr[5];
return;
// with a semi-unique MAC address from the UUID
/* Enable FMC ISP function */
SYS_UnlockReg();
FMC_Open();
// = FMC_ReadUID(0);
uID1 = FMC_ReadUID(1);
word1 = (uID1 & 0x003FFFFF) | ((uID1 & 0x030000) << 6) >> 8;
word0 = ((FMC_ReadUID(0) >> 4) << 20) | ((uID1 & 0xFF)<<12) | (FMC_ReadUID(2) & 0xFFF);
/* Disable FMC ISP function */
FMC_Close();
/* Lock protected registers */
SYS_LockReg();
}
word1 |= 0x00000200;
word1 &= 0x0000FEFF;
mac[0] = (word1 & 0x000000ff);
mac[1] = (word1 & 0x0000ff00) >> 8;
mac[0] = (word1 & 0x0000ff00) >> 8;
mac[1] = (word1 & 0x000000ff);
mac[2] = (word0 & 0xff000000) >> 24;
mac[3] = (word0 & 0x00ff0000) >> 16;
mac[4] = (word0 & 0x0000ff00) >> 8;
mac[5] = (word0 & 0x000000ff);
// printf("mac address %02x-%02x-%02x-%02x-%02x-%02x \r\n", mac[0], mac[1],mac[2],mac[3],mac[4],mac[5]);
}
/**