drivers: hwinfo: update stm32 implementation byte order (8c749ffc) · Commits · Wenxi XU / zephyr

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>

drivers/hwinfo/hwinfo_stm32.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -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);

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