STM32G070的CPUID地址：

1. /*!< Device Electronic Signature */
   
2. #define PACKAGE_BASE          (0x1FFF7500UL)        /*!< Package data register base address     */
   
3. #define UID_BASE              (0x1FFF7590UL)        /*!< Unique device ID register base address */
   
4. #define FLASHSIZE_BASE        (0x1FFF75E0UL)        /*!< Flash size data register base address  */
   
5. /**
   

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HAL库已经预留了API可以直接读取：

1. /**
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2.   * @brief  Returns first word of the unique device identifier (UID based on 96 bits)
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3.   * @retval Device identifier
   
4.   */
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5. uint32_t HAL_GetUIDw0(void)
   
6. {
   
7.   return (READ_REG(*((uint32_t *)UID_BASE)));
   
8. }
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9. 
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10. /**
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11.   * @brief  Returns second word of the unique device identifier (UID based on 96 bits)
    
12.   * @retval Device identifier
    
13.   */
    
14. uint32_t HAL_GetUIDw1(void)
    
15. {
    
16.   return (READ_REG(*((uint32_t *)(UID_BASE + 4U))));
    
17. }
    
18. 
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19. /**
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20.   * @brief  Returns third word of the unique device identifier (UID based on 96 bits)
    
21.   * @retval Device identifier
    
22.   */
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23. uint32_t HAL_GetUIDw2(void)
    
24. {
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25.   return (READ_REG(*((uint32_t *)(UID_BASE + 8U))));
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26. }
    
27. 
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