4.3.1 Wi-Fi MAC Address
The WINC firmware provides two methods to assign the WINC MAC address:
- Assignment from the host MCU – this
method occurs when the host MCU application calls the
m2m_wifi_set_mac_addressAPI after initialization usingm2m_wifi_initAPI. - Assignment from the WINC OTP
(One-Time-Programmable) memory – the WINC supports an internal MAC address
assignment method through a built-in OTP memory. If MAC address is programmed in the
WINC OTP memory, the WINC working MAC address defaults to the OTP MAC address unless
the host MCU application programmatically sets a different MAC address after
initialization using the API
m2m_wifi_set_mac_address.
Note:
- OTP MAC address is programmed in the WINC OTP memory at the time of manufacturing.
- Use
m2m_wifi_get_otp_mac_addressAPI to check if there is a valid programmed MAC address in the WINC OTP memory. The host MCU application can also use the same API to read the OTP MAC address octets.m2m_wifi_get_otp_mac_addressAPI is not to be confused with them2m_wifi_get_mac_addressAPI, which reads the working WINC MAC address in the WINC firmware regardless of whether it is assigned from the host MCU or from the WINC OTP. - For more details on API, refer to the Advanced Software Framework for ATWINC1500 (Wi-Fi).