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drivers: hwinfo: update stm32 implementation byte order

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The unique identifier for this platform is a 96-bit value, where the
upper 56 bits provide an ASCII encoding of the lot number, and the
lower 40 bits provide the wafer number and X, Y position on the wafer.
Extract the value into big-endian form for device-independent
interpretation.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2020-04-10 12:30:08 -05:00 • committed by Carles Cufí
commit 8c749ffc0a
1 changed files with 4 additions and 3 deletions
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7
drivers/hwinfo/hwinfo_stm32.c
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@ -7,6 +7,7 @@
#include <soc.h>
#include <drivers/hwinfo.h>
#include <string.h>
#include <sys/byteorder.h>
struct stm32_uid {
u32_t id[3];
@ -16,9 +17,9 @@ ssize_t z_impl_hwinfo_get_device_id(u8_t *buffer, size_t length)
{
struct stm32_uid dev_id;
dev_id.id[0] = LL_GetUID_Word0();
dev_id.id[1] = LL_GetUID_Word1();
dev_id.id[2] = LL_GetUID_Word2();
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);