[N32L43x Review] 5. Get MCU 96-bit UID, 128-bit UCID

freeelectron

[N32L43x Review] 5. Get MCU 96-bit UID, 128-bit UCID [Copy link]

 

1. Introduction

The general MCU only has 96-bit UID, while N32L43x contains not only 96-bit UID but also 128-bit UCID, which is read and tested in this article.

2. UCID and UID

96-bit UID information, starting address is 0x1FFFF7F0;

128-bit UCID information, starting address is 0x1FFFF7C0;

When the device leaves the factory, it is already fixed inside the MCU and cannot be changed by the user.

3. Program reading

#define   UCID      0x1FFFF7C0
#define   UID       0x1FFFF7F0


struct McuInfo_t
{
	uint8_t UniqueCustomerId[16];
	uint8_t UniqueDeviceId[12];
}McuInfo;


void GetMcuInfo(void)
{
	printf("Unique Customer Id:[");
	for(uint8_t i=0;i<16;i++)
	{
		McuInfo.UniqueCustomerId[i]=*(uint8_t*)(UCID+i);
		printf(" %02x",McuInfo.UniqueCustomerId[i]);
	}
	printf("]\r\n\r\n");
	
	
	printf("Unique Device Id:[");
	for(uint8_t i=0;i<12;i++)
	{
		McuInfo.UniqueDeviceId[i]=*(uint8_t*)(UID+i);
		printf(" %02x",McuInfo.UniqueDeviceId[i]);
	}
	printf("]\r\n");
}

4. Testing

It can be seen that the program reads the same as the debugger debug read.

秦天qintian0303

Where is this information stored? Can it be read directly like a variable? Doesn't it require configuring something?

lugl4313820

Can this be used for something? Please give me some scientific knowledge, otherwise I won’t know what to do with it after taking it out!

freeelectron

lugl4313820 posted on 2022-7-8 11:26 Can this be used for something? Please give me some scientific knowledge, otherwise I don’t know what to do with it after taking it out!

Unique ID, moderator, can you add more information? What do you think it can be used for?

lugl4313820

freeelectron posted on 2022-7-8 11:51 Unique id, moderator, can you add something, what do you think can be done?

When I used stm8 to make a thermometer, I used it to make a unique identification for the device, but it was a hassle to take it out and authenticate it one by one. If it is matched on a large scale, it is really a hassle. I wonder if other netizens have good application cases. I searched online, but there is really no specific solution.