HAL_LCD_Write(LCD_HandleTypeDef *hlcd, uint32_t RAMRegisterIndex, uint32_t RAMRegisterMask, uint32_t Data);
函数参数解析：
LCD_HandleTypeDef *hlcd 初始化的LCD句柄指针
uint32_t RAMRegisterIndex RAM寄存器,COM口寄存器
uint32_t RAMRegisterMask 屏蔽位
uint32_t Data 要写入的数据
RAMRegisterIndex COM0-COM7总共16个
COM0 对应 LCD_RAM_REGISTER0 LCD_RAM_REGISTER1
COM1 对应 LCD_RAM_REGISTER2 LCD_RAM_REGISTER3
COM2 对应 LCD_RAM_REGISTER4 LCD_RAM_REGISTER5
COM3 对应 LCD_RAM_REGISTER6 LCD_RAM_REGISTER7
COM4 对应 LCD_RAM_REGISTER8 LCD_RAM_REGISTER9
COM5 对应 LCD_RAM_REGISTER10 LCD_RAM_REGISTER11
COM6 对应 LCD_RAM_REGISTER12 LCD_RAM_REGISTER13
COM7 对应 LCD_RAM_REGISTER14 LCD_RAM_REGISTER15
#define LCD_RAM_REGISTER0 ((uint32_t)0x00000000) /*!< LCD RAM Register 0 */
#define LCD_RAM_REGISTER1 ((uint32_t)0x00000001) /*!< LCD RAM Register 1 */
#define LCD_RAM_REGISTER2 ((uint32_t)0x00000002) /*!< LCD RAM Register 2 */
#define LCD_RAM_REGISTER3 ((uint32_t)0x00000003) /*!< LCD RAM Register 3 */
#define LCD_RAM_REGISTER4 ((uint32_t)0x00000004) /*!< LCD RAM Register 4 */
#define LCD_RAM_REGISTER5 ((uint32_t)0x00000005) /*!< LCD RAM Register 5 */
#define LCD_RAM_REGISTER6 ((uint32_t)0x00000006) /*!< LCD RAM Register 6 */
#define LCD_RAM_REGISTER7 ((uint32_t)0x00000007) /*!< LCD RAM Register 7 */
#define LCD_RAM_REGISTER8 ((uint32_t)0x00000008) /*!< LCD RAM Register 8 */
#define LCD_RAM_REGISTER9 ((uint32_t)0x00000009) /*!< LCD RAM Register 9 */
#define LCD_RAM_REGISTER10 ((uint32_t)0x0000000A) /*!< LCD RAM Register 10 */
#define LCD_RAM_REGISTER11 ((uint32_t)0x0000000B) /*!< LCD RAM Register 11 */
#define LCD_RAM_REGISTER12 ((uint32_t)0x0000000C) /*!< LCD RAM Register 12 */
#define LCD_RAM_REGISTER13 ((uint32_t)0x0000000D) /*!< LCD RAM Register 13 */
#define LCD_RAM_REGISTER14 ((uint32_t)0x0000000E) /*!< LCD RAM Register 14 */
#define LCD_RAM_REGISTER15 ((uint32_t)0x0000000F) /*!< LCD RAM Register 15 */
RAMRegisterMask 和 Data 都是32位，每一位代表一个SEG,屏蔽对应的位，对应位的Data就会失效，还有就是，在操作时，数据要按照要操作的SEG位去赋值，需要点亮的就在该位写1，需要关闭的就写0，屏蔽位为0或者1都可以，这个不会影响我们显示，但是不能省略，32位数据，一定是一一对应的。
对应关系如下图：
