为什么在取Unique device ID后，在不同的STM机器上取的是一样的

hrc2014a · 发表于 2015-1-2 11:42:04

为什么在取Unique device ID后，在两台不同的STM机器上取的是一样的
宏定义如下：

#define PROCESSOR_ADDRESS_PART0              (uint32_t)0x1FFFF7AC
#define PROCESSOR_ADDRESS_PART1             PROCESSOR_ADDRESS_PART0 + (uint32_t)0x00000004
#define PROCESSOR_ADDRESS_PART2             PROCESSOR_ADDRESS_PART1 + (uint32_t)0X00000004
#define PROCESSOR_ID_PART0                 *((uint32_t *) PROCESSOR_ADDRESS_PART0)
#define PROCESSOR_ID_PART1                       *((uint32_t *) PROCESSOR_ADDRESS_PART1)
#define PROCESSOR_ID_PART2                      *((uint32_t *) PROCESSOR_ADDRESS_PART2)

两台STM运行后取的值如下
PROCESSOR_ID_PART0 = 0x00280046
PROCESSOR_ID_PART1 = 0xfffffffc
PROCESSOR_ID_PART2 = 0xffff0080

这个ID不是唯一标识的么？
为啥子我会出现这种情况

hrc2014a · 发表于 2015-1-2 11:42:05

用以下代码获取ID即可
  uint32_t Device_Serial0, Device_Serial1, Device_Serial2;
  Device_Serial0 = *(uint32_t *)(PROCESSOR_ADDRESS_PART0);
  Device_Serial1 = *(uint32_t *)(PROCESSOR_ADDRESS_PART1);
  Device_Serial2 = *(uint32_t *)(PROCESSOR_ADDRESS_PART2);