一些小问题汇总

1. 区分&与&&

按位与(&)和逻辑与（&&）例如：if(0x8000) = if(很大的整数)

2. 什么是短路求值

if(a>b && c>d)，如果判断的a>b为真，则c>d不再进行判断

3. 值<<移动的位数（十六进制下的位操作）（8421码）

#define ADC_CSR_AWD1_Pos          (0U)
#define ADC_CSR_AWD1_Msk          (0x1UL << ADC_CSR_AWD1_Pos)                  /*!< 0x00000001 */
#define ADC_CSR_AWD1              ADC_CSR_AWD1_Msk                             /*!<ADC1 Analog watchdog flag */
#define ADC_CSR_EOC1_Pos          (1U)
#define ADC_CSR_EOC1_Msk          (0x1UL << ADC_CSR_EOC1_Pos)                   /*!< 0x00000002 */
#define ADC_CSR_EOC1              ADC_CSR_EOC1_Msk                             /*!<ADC1 End of conversion */
#define ADC_CSR_JEOC1_Pos         (2U)
#define ADC_CSR_JEOC1_Msk         (0x1UL << ADC_CSR_JEOC1_Pos)                  /*!< 0x00000004 */
#define ADC_CSR_JEOC1             ADC_CSR_JEOC1_Msk                            /*!<ADC1 Injected channel end of conversion */
#define ADC_CSR_JSTRT1_Pos        (3U)
#define ADC_CSR_JSTRT1_Msk        (0x1UL << ADC_CSR_JSTRT1_Pos)                 /*!< 0x00000008 */
#define ADC_CSR_JSTRT1            ADC_CSR_JSTRT1_Msk                           /*!<ADC1 Injected channel Start flag */
#define ADC_CSR_STRT1_Pos         (4U)  //16进制中的1位(移动了1次)
#define ADC_CSR_STRT1_Msk         (0x1UL << ADC_CSR_STRT1_Pos)                  /*!< 0x00000010 */
#define ADC_CSR_STRT1             ADC_CSR_STRT1_Msk                            /*!<ADC1 Regular channel Start flag */
#define ADC_CSR_OVR1_Pos          (5U)
#define ADC_CSR_OVR1_Msk          (0x1UL << ADC_CSR_OVR1_Pos)                   /*!< 0x00000020 */
#define ADC_CSR_OVR1              ADC_CSR_OVR1_Msk                             /*!<ADC1 DMA overrun  flag */
#define ADC_CSR_AWD2_Pos          (8U)  //16进制中的2位(移动了2次)
#define ADC_CSR_AWD2_Msk          (0x1UL << ADC_CSR_AWD2_Pos)                   /*!< 0x00000100 */
#define ADC_CSR_AWD2              ADC_CSR_AWD2_Msk                             /*!<ADC2 Analog watchdog flag */
#define ADC_CSR_EOC2_Pos          (9U)  //多移动一位 根据8421排列，仅限于0x1UL)
#define ADC_CSR_EOC2_Msk          (0x1UL << ADC_CSR_EOC2_Pos)                   /*!< 0x00000200 */
#define ADC_CSR_EOC2              ADC_CSR_EOC2_Msk                             /*!<ADC2 End of conversion */
#define ADC_CSR_JEOC2_Pos         (10U)
#define ADC_CSR_JEOC2_Msk         (0x1UL << ADC_CSR_JEOC2_Pos)                  /*!< 0x00000400 */
#define ADC_CSR_JEOC2             ADC_CSR_JEOC2_Msk                            /*!<ADC2 Injected channel end of conversion */
#define ADC_CSR_JSTRT2_Pos        (11U)
#define ADC_CSR_JSTRT2_Msk        (0x1UL << ADC_CSR_JSTRT2_Pos)                 /*!< 0x00000800 */
#define ADC_CSR_JSTRT2            ADC_CSR_JSTRT2_Msk                           /*!<ADC2 Injected channel Start flag */
#define ADC_CSR_STRT2_Pos         (12U) //16进制中的3位(移动了3次)
#define ADC_CSR_STRT2_Msk         (0x1UL << ADC_CSR_STRT2_Pos)                  /*!< 0x00001000 */
#define ADC_CSR_STRT2             ADC_CSR_STRT2_Msk                            /*!<ADC2 Regular channel Start flag */
#define ADC_CSR_OVR2_Pos          (13U)
#define ADC_CSR_OVR2_Msk          (0x1UL << ADC_CSR_OVR2_Pos)                   /*!< 0x00002000 */
#define ADC_CSR_OVR2              ADC_CSR_OVR2_Msk                             /*!<ADC2 DMA overrun  flag */
#define ADC_CSR_AWD3_Pos          (16U) //16进制中的4位(移动了4次)
#define ADC_CSR_AWD3_Msk          (0x1UL << ADC_CSR_AWD3_Pos)                   /*!< 0x00010000 */
#define ADC_CSR_AWD3              ADC_CSR_AWD3_Msk                             /*!<ADC3 Analog watchdog flag */
#define ADC_CSR_EOC3_Pos          (17U)
#define ADC_CSR_EOC3_Msk          (0x1UL << ADC_CSR_EOC3_Pos)                   /*!< 0x00020000 */
#define ADC_CSR_EOC3              ADC_CSR_EOC3_Msk                             /*!<ADC3 End of conversion */
#define ADC_CSR_JEOC3_Pos         (18U)
#define ADC_CSR_JEOC3_Msk         (0x1UL << ADC_CSR_JEOC3_Pos)                  /*!< 0x00040000 */
#define ADC_CSR_JEOC3             ADC_CSR_JEOC3_Msk                            /*!<ADC3 Injected channel end of conversion */
#define ADC_CSR_JSTRT3_Pos        (19U)
#define ADC_CSR_JSTRT3_Msk        (0x1UL << ADC_CSR_JSTRT3_Pos)                 /*!< 0x00080000 */
#define ADC_CSR_JSTRT3            ADC_CSR_JSTRT3_Msk                           /*!<ADC3 Injected channel Start flag */
#define ADC_CSR_STRT3_Pos         (20U) //16进制中的5位(移动了5次)
#define ADC_CSR_STRT3_Msk         (0x1UL << ADC_CSR_STRT3_Pos)                  /*!< 0x00100000 */
#define ADC_CSR_STRT3             ADC_CSR_STRT3_Msk                            /*!<ADC3 Regular channel Start flag */
#define ADC_CSR_OVR3_Pos          (21U)
#define ADC_CSR_OVR3_Msk          (0x1UL << ADC_CSR_OVR3_Pos)                   /*!< 0x00200000 */
#define ADC_CSR_OVR3              ADC_CSR_OVR3_Msk                             /*!<ADC3 DMA overrun  flag */