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Merge pull request #1797 from 0xc0170/dev_k64f_hal_additions 

k64f - mac address - fix warnings - get UID via K64F SIM macros
pull/1871/head
Martin Kojtal 2016-06-07 16:02:40 +01:00
parent 4afc14d18b 04e4c6a880
commit 02bb0df4dc
1 changed files with 10 additions and 9 deletions
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19
hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K64F/TARGET_FRDM/mbed_overrides.c
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@ -44,18 +44,19 @@ void rtc_setup_oscillator(RTC_Type *base)
// Provide ethernet devices with a semi-unique MAC address from the UUID
void mbed_mac_address(char *mac)
{
uint16_t MAC[3]; // 3 16 bits words for the MAC
unsigned int UUID_LOC_BASE = 0x40048054; // First adddress of the 4-word UUID
char uuid[16]; // So we can take a local copy of the UUID
uint32_t MAC[3]; // 3 16 bits words for the MAC
// copy the UUID to the variable MAC[]
memcpy(uuid,(const void*)UUID_LOC_BASE,sizeof(uuid));
// get UID via SIM_UID macros defined in the K64F MCU CMSIS header file
uint32_t UID[4];
UID[0] = SIM->UIDH;
UID[1] = SIM->UIDMH;
UID[2] = SIM->UIDML;
UID[3] = SIM->UIDL;
// generate three CRC16's using different slices of the UUID
MAC[0] = crcSlow(uuid, 8); // most significant half-word
MAC[1] = crcSlow(uuid, 12);
MAC[2] = crcSlow(uuid, 16); // least significant half word
MAC[0] = crcSlow((const uint8_t *)UID, 8); // most significant half-word
MAC[1] = crcSlow((const uint8_t *)UID, 12);
MAC[2] = crcSlow((const uint8_t *)UID, 16); // least significant half word
// The network stack expects an array of 6 bytes
// so we copy, and shift and copy from the half-word array to the byte array