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[K64F] Add mbed_mac_address implementation

pull/550/head
sg- 2014-10-07 17:41:39 -05:00
parent 46e37048a8
commit 3bd868408b
1 changed files with 22 additions and 0 deletions
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22
libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_MCU_K64F/TARGET_FRDM/mbed_overrides.c
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@ -30,3 +30,25 @@ void NMI_Handler(void)
gpio_t gpio;
gpio_init_in(&gpio, PTA4);
}
// Provide ethernet devices with a semi-unique MAC address from the UUID
void mbed_mac_address(char *mac)
{
// Fetch word 0
uint32_t word0 = *(uint32_t *)0x40048060;
// 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 *)0x4004805C;
word1 |= 0x00000200;
word1 &= 0x0000FEFF;
mac[0] = (word1 & 0x000000ff);
mac[1] = (word1 & 0x0000ff00) >> 8;
mac[2] = (word0 & 0xff000000) >> 24;
mac[3] = (word0 & 0x00ff0000) >> 16;
mac[4] = (word0 & 0x0000ff00) >> 8;
mac[5] = (word0 & 0x000000ff);
}