| /* |
| * Copyright (c) 2018 Alexander Wachter |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <soc.h> |
| #include <drivers/hwinfo.h> |
| #include <string.h> |
| #include <sys/byteorder.h> |
| |
| struct stm32_uid { |
| uint32_t id[3]; |
| }; |
| |
| ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length) |
| { |
| struct stm32_uid dev_id; |
| |
| dev_id.id[0] = sys_cpu_to_be32(LL_GetUID_Word2()); |
| dev_id.id[1] = sys_cpu_to_be32(LL_GetUID_Word1()); |
| dev_id.id[2] = sys_cpu_to_be32(LL_GetUID_Word0()); |
| |
| if (length > sizeof(dev_id.id)) { |
| length = sizeof(dev_id.id); |
| } |
| |
| memcpy(buffer, dev_id.id, length); |
| |
| return length; |
| } |