LL16.H库中LCD寄存器之一、LCD使能寄存器

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 一、LCDPEN：LCD使能寄存器 
PEN[31:0]：LCD引脚使能。
   0：LCDn上的LCD操作关闭；
   1：LCDn上的LCD操作激活。
     这些位是用来设置LCD引脚功能的开启，在初始化LCD时，必须要开启LCD功能，否则LCD功能不能使用。
二、LCDBPEN：LCD底板使能寄存器（背板使能控制寄存器）
 BPEN[28:0]：底板使能。
    0：LCDn上的前板操作激活；
    1：LCDn上的底板操作激活。



附录1、LCD使能控制寄存器0在LL16.H中的定义。
/*** LCDPEN0 - LCD Pin Enable Register 0; 0x00000880 ***/
typedef union {
  byte Byte;
  struct {
    byte PEN0        :1;                                       /* Enable LCD pin 0 for LCD operation */
    byte PEN1        :1;                                       /* Enable LCD pin 1 for LCD operation */
    byte PEN2        :1;                                       /* Enable LCD pin 2 for LCD operation */
    byte PEN3        :1;                                       /* Enable LCD pin 3 for LCD operation */
    byte PEN4        :1;                                       /* Enable LCD pin 4 for LCD operation */
    byte PEN5        :1;                                       /* Enable LCD pin 5 for LCD operation */
    byte PEN6        :1;                                       /* Enable LCD pin 6 for LCD operation */
    byte PEN7        :1;                                       /* Enable LCD pin 7 for LCD operation */
  } Bits;
} LCDPEN0STR;
extern volatile LCDPEN0STR _LCDPEN0 @0x00000880;
#define LCDPEN0                         _LCDPEN0.Byte
#define LCDPEN0_PEN0                    _LCDPEN0.Bits.PEN0
#define LCDPEN0_PEN1                    _LCDPEN0.Bits.PEN1
#define LCDPEN0_PEN2                    _LCDPEN0.Bits.PEN2
#define LCDPEN0_PEN3                    _LCDPEN0.Bits.PEN3
#define LCDPEN0_PEN4                    _LCDPEN0.Bits.PEN4
#define LCDPEN0_PEN5                    _LCDPEN0.Bits.PEN5
#define LCDPEN0_PEN6                    _LCDPEN0.Bits.PEN6
#define LCDPEN0_PEN7                    _LCDPEN0.Bits.PEN7
/* LCDPEN_ARR: Access 4 LCDPENx registers in an array */
#define LCDPEN_ARR                      ((volatile byte * __far) &LCDPEN0)
#define LCDPEN0_PEN0_MASK               1
#define LCDPEN0_PEN1_MASK               2
#define LCDPEN0_PEN2_MASK               4
#define LCDPEN0_PEN3_MASK               8
#define LCDPEN0_PEN4_MASK               16
#define LCDPEN0_PEN5_MASK               32
#define LCDPEN0_PEN6_MASK               64
#define LCDPEN0_PEN7_MASK               128
附录2、LCD底板使能寄存器在LL16.H中的定义。
/*** LCDBPEN0 - LCD Backplane Enable Register 0; 0x00000888 ***/
typedef union {
  byte Byte;
  struct {
    byte BPEN0       :1;                                       /* Enable LCD pin 0 to operate as an LCD backplane or an LCD frontplane */
    byte BPEN1       :1;                                       /* Enable LCD pin 1 to operate as an LCD backplane or an LCD frontplane */
    byte BPEN2       :1;                                       /* Enable LCD pin 2 to operate as an LCD backplane or an LCD frontplane */
    byte BPEN3       :1;                                       /* Enable LCD pin 3 to operate as an LCD backplane or an LCD frontplane */
    byte BPEN4       :1;                                       /* Enable LCD pin 4 to operate as an LCD backplane or an LCD frontplane */
    byte BPEN5       :1;                                       /* Enable LCD pin 5 to operate as an LCD backplane or an LCD frontplane */
    byte BPEN6       :1;                                       /* Enable LCD pin 6 to operate as an LCD backplane or an LCD frontplane */
    byte BPEN7       :1;                                       /* Enable LCD pin 7 to operate as an LCD backplane or an LCD frontplane */
  } Bits;
} LCDBPEN0STR;
extern volatile LCDBPEN0STR _LCDBPEN0 @0x00000888;
#define LCDBPEN0                        _LCDBPEN0.Byte
#define LCDBPEN0_BPEN0                  _LCDBPEN0.Bits.BPEN0
#define LCDBPEN0_BPEN1                  _LCDBPEN0.Bits.BPEN1
#define LCDBPEN0_BPEN2                  _LCDBPEN0.Bits.BPEN2
#define LCDBPEN0_BPEN3                  _LCDBPEN0.Bits.BPEN3
#define LCDBPEN0_BPEN4                  _LCDBPEN0.Bits.BPEN4
#define LCDBPEN0_BPEN5                  _LCDBPEN0.Bits.BPEN5
#define LCDBPEN0_BPEN6                  _LCDBPEN0.Bits.BPEN6
#define LCDBPEN0_BPEN7                  _LCDBPEN0.Bits.BPEN7
/* LCDBPEN_ARR: Access 4 LCDBPENx registers in an array */
#define LCDBPEN_ARR                     ((volatile byte * __far) &LCDBPEN0)
#define LCDBPEN0_BPEN0_MASK             1
#define LCDBPEN0_BPEN1_MASK             2
#define LCDBPEN0_BPEN2_MASK             4
#define LCDBPEN0_BPEN3_MASK             8
#define LCDBPEN0_BPEN4_MASK             16
#define LCDBPEN0_BPEN5_MASK             32
#define LCDBPEN0_BPEN6_MASK             64
#define LCDBPEN0_BPEN7_MASK             128

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