35 lines
660 B
C
35 lines
660 B
C
/*
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* Copyright (c) 2024 Nuvoton Technology Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <soc.h>
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#include <zephyr/drivers/hwinfo.h>
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#include <zephyr/sys/byteorder.h>
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#include <string.h>
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struct numaker_uid {
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uint32_t id[3];
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};
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ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length)
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{
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struct numaker_uid dev_id;
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SYS_UnlockReg();
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RMC_Open();
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dev_id.id[0] = sys_cpu_to_be32(RMC_ReadUID(0));
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dev_id.id[1] = sys_cpu_to_be32(RMC_ReadUID(1));
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dev_id.id[2] = sys_cpu_to_be32(RMC_ReadUID(2));
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length = MIN(length, sizeof(dev_id.id));
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memcpy(buffer, dev_id.id, length);
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RMC_Close();
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SYS_LockReg();
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return length;
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}
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