main._c

一个关于AVR单片机的例程

//ICC-AVR application builder : 2007-5-3 4:45:38
// Target : M16
// Crystal: 7.3728Mhz

#include <iom16v.h>
#include <macros.h>

#define  LCD_RST_PIN                0x01  //  PB0
#define  LCD_CE_PIN                 0x02  //  PB1
#define  LCD_DC_PIN                 0x04  //  PB2
#define  SPI_MOSI_PIN               0x20  //  PB5
#define  SPI_CLK_PIN                0x80  //  PB7

#define  X_Length  45
#define  X_Init    0
#define  Y_Init    0


static const char FontLookup [][5] =
{
  { 0x00, 0x00, 0x00, 0x00, 0x00 }, // sp
  { 0x00, 0x00, 0x2f, 0x00, 0x00 },   // !
  { 0x00, 0x07, 0x00, 0x07, 0x00 },   // "
  { 0x14, 0x7f, 0x14, 0x7f, 0x14 },   // #
  { 0x24, 0x2a, 0x7f, 0x2a, 0x12 },   // $
  { 0xc4, 0xc8, 0x10, 0x26, 0x46 },   // %
  { 0x36, 0x49, 0x55, 0x22, 0x50 },   // &
  { 0x00, 0x05, 0x03, 0x00, 0x00 },   // '
  { 0x00, 0x1c, 0x22, 0x41, 0x00 },   // (
  { 0x00, 0x41, 0x22, 0x1c, 0x00 },   // )
  { 0x14, 0x08, 0x3E, 0x08, 0x14 },   // *
  { 0x08, 0x08, 0x3E, 0x08, 0x08 },   // +
  { 0x00, 0x00, 0x50, 0x30, 0x00 },   // ,
  { 0x10, 0x10, 0x10, 0x10, 0x10 },   // -
  { 0x00, 0x60, 0x60, 0x00, 0x00 },   // .
  { 0x20, 0x10, 0x08, 0x04, 0x02 },   // /
  { 0x3E, 0x51, 0x49, 0x45, 0x3E },   // 0
  { 0x00, 0x42, 0x7F, 0x40, 0x00 },   // 1
  { 0x42, 0x61, 0x51, 0x49, 0x46 },   // 2
  { 0x21, 0x41, 0x45, 0x4B, 0x31 },   // 3
  { 0x18, 0x14, 0x12, 0x7F, 0x10 },   // 4
  { 0x27, 0x45, 0x45, 0x45, 0x39 },   // 5
  { 0x3C, 0x4A, 0x49, 0x49, 0x30 },   // 6
  { 0x01, 0x71, 0x09, 0x05, 0x03 },   // 7
  { 0x36, 0x49, 0x49, 0x49, 0x36 },   // 8
  { 0x06, 0x49, 0x49, 0x29, 0x1E },   // 9
  { 0x00, 0x36, 0x36, 0x00, 0x00 },   // :
  { 0x00, 0x56, 0x36, 0x00, 0x00 },   // ;
  { 0x08, 0x14, 0x22, 0x41, 0x00 },   // <
  { 0x14, 0x14, 0x14, 0x14, 0x14 },   // =
  { 0x00, 0x41, 0x22, 0x14, 0x08 },   // >
  { 0x02, 0x01, 0x51, 0x09, 0x06 },   // ?
  { 0x32, 0x49, 0x59, 0x51, 0x3E },   // @
  { 0x7E, 0x11, 0x11, 0x11, 0x7E },   // A
  { 0x7F, 0x49, 0x49, 0x49, 0x36 },   // B
  { 0x3E, 0x41, 0x41, 0x41, 0x22 },   // C
  { 0x7F, 0x41, 0x41, 0x22, 0x1C },   // D
  { 0x7F, 0x49, 0x49, 0x49, 0x41 },   // E
  { 0x7F, 0x09, 0x09, 0x09, 0x01 },   // F
  { 0x3E, 0x41, 0x49, 0x49, 0x7A },   // G
  { 0x7F, 0x08, 0x08, 0x08, 0x7F },   // H
  { 0x00, 0x41, 0x7F, 0x41, 0x00 },   // I
  { 0x20, 0x40, 0x41, 0x3F, 0x01 },   // J
  { 0x7F, 0x08, 0x14, 0x22, 0x41 },   // K
  { 0x7F, 0x40, 0x40, 0x40, 0x40 },   // L
  { 0x7F, 0x02, 0x0C, 0x02, 0x7F },   // M
  { 0x7F, 0x04, 0x08, 0x10, 0x7F },   // N
  { 0x3E, 0x41, 0x41, 0x41, 0x3E },   // O
  { 0x7F, 0x09, 0x09, 0x09, 0x06 },   // P
  { 0x3E, 0x41, 0x51, 0x21, 0x5E },   // Q
  { 0x7F, 0x09, 0x19, 0x29, 0x46 },   // R
  { 0x46, 0x49, 0x49, 0x49, 0x31 },   // S
  { 0x01, 0x01, 0x7F, 0x01, 0x01 },   // T
  { 0x3F, 0x40, 0x40, 0x40, 0x3F },   // U
  { 0x1F, 0x20, 0x40, 0x20, 0x1F },   // V
  { 0x3F, 0x40, 0x38, 0x40, 0x3F },   // W
  { 0x63, 0x14, 0x08, 0x14, 0x63 },   // X
  { 0x07, 0x08, 0x70, 0x08, 0x07 },   // Y
  { 0x61, 0x51, 0x49, 0x45, 0x43 },   // Z
  { 0x00, 0x7F, 0x41, 0x41, 0x00 },   // [
  { 0x55, 0x2A, 0x55, 0x2A, 0x55 },   // 55
  { 0x00, 0x41, 0x41, 0x7F, 0x00 },   // ]
  { 0x04, 0x02, 0x01, 0x02, 0x04 },   // ^
  { 0x40, 0x40, 0x40, 0x40, 0x40 },   // _
  { 0x00, 0x01, 0x02, 0x04, 0x00 },   // '
  { 0x20, 0x54, 0x54, 0x54, 0x78 },   // a
  { 0x7F, 0x48, 0x44, 0x44, 0x38 },   // b
  { 0x38, 0x44, 0x44, 0x44, 0x20 },   // c
  { 0x38, 0x44, 0x44, 0x48, 0x7F },   // d
  { 0x38, 0x54, 0x54, 0x54, 0x18 },   // e
  { 0x08, 0x7E, 0x09, 0x01, 0x02 },   // f
  { 0x0C, 0x52, 0x52, 0x52, 0x3E },   // g
  { 0x7F, 0x08, 0x04, 0x04, 0x78 },   // h
  { 0x00, 0x44, 0x7D, 0x40, 0x00 },   // i
  { 0x20, 0x40, 0x44, 0x3D, 0x00 },   // j
  { 0x7F, 0x10, 0x28, 0x44, 0x00 },   // k
  { 0x00, 0x41, 0x7F, 0x40, 0x00 },   // l
  { 0x7C, 0x04, 0x18, 0x04, 0x78 },   // m
  { 0x7C, 0x08, 0x04, 0x04, 0x78 },   // n
  { 0x38, 0x44, 0x44, 0x44, 0x38 },   // o
  { 0x7C, 0x14, 0x14, 0x14, 0x08 },   // p
  { 0x08, 0x14, 0x14, 0x18, 0x7C },   // q
  { 0x7C, 0x08, 0x04, 0x04, 0x08 },   // r
  { 0x48, 0x54, 0x54, 0x54, 0x20 },   // s
  { 0x04, 0x3F, 0x44, 0x40, 0x20 },   // t
  { 0x3C, 0x40, 0x40, 0x20, 0x7C },   // u
  { 0x1C, 0x20, 0x40, 0x20, 0x1C },   // v
  { 0x3C, 0x40, 0x30, 0x40, 0x3C },   // w
  { 0x44, 0x28, 0x10, 0x28, 0x44 },   // x
  { 0x0C, 0x50, 0x50, 0x50, 0x3C },   // y
  { 0x44, 0x64, 0x54, 0x4C, 0x44 }   // z
};


/*--------------------------------------------------------------------------------------------------
                                 Public function prototypes
--------------------------------------------------------------------------------------------------*/
void LcdInit       ( void );
void LcdClear      ( void );

static void LcdSend    ( unsigned char, unsigned char);
static void Delay      ( void );
void LcdGotoXY         ( unsigned char, unsigned char );


/*--------------------------------------------------------------------------------------------------
  Name         :  LcdInit
  Description  :  Performs MCU SPI & LCD controller initialization.
  Argument(s)  :  None.
  Return value :  None.
--------------------------------------------------------------------------------------------------*/
void LcdInit( void )
{    
    //unsigned char Clear;
    //  Pull-up on reset pin，上电复位端口，此时为高，不复位；
    PORTB |= LCD_RST_PIN;

    //  Set output bits on port B,设置输出口；
    DDRB |= LCD_RST_PIN | LCD_DC_PIN | LCD_CE_PIN | SPI_MOSI_PIN | SPI_CLK_PIN;

    Delay();

    //  Toggle display reset pin.
    PORTB &= ~LCD_RST_PIN; //上电复位；
    Delay();
    PORTB |= LCD_RST_PIN;  //复位完；

    //  SPI初始化；Enable SPI port: No interrupt, MSBit first, Master mode, CPOL->0, CPHA->0, Clk/4
    SPCR = BIT(SPE)|BIT(MSTR); //使能SPI,主机模式；
    //SPSR = 0x00;  //似乎不用这几句也能正常运行；
    //Clear= SPSR;
    //Clear= SPDR;
    //  Disable LCD controller
    PORTB |= LCD_CE_PIN;       

    LcdSend( 0x21, 0 );  // LCD Extended Commands.
    LcdSend( 0xC8, 0 );  // Set LCD Vop (Contrast).
    LcdSend( 0x06, 0 );  // Set Temp coefficent.
    LcdSend( 0x13, 0 );  // LCD bias mode 1:48.
    LcdSend( 0x20, 0 );  // LCD Standard Commands, Horizontal addressing mode.
    LcdSend( 0x0C, 0 );  // LCD in normal mode.

    LcdClear();
   
}


/*--------------------------------------------------------------------------------------------------
  Name         :  LcdClear
  Description  :  Clears the display.
  Argument(s)  :  None.
  Return value :  None.
--------------------------------------------------------------------------------------------------*/
void LcdClear(void)
{
unsigned int i;

LcdSend(0x0c, 0); 
LcdSend(0x80, 0); //此时默认操作为清屏

for (i=0; i<504; i++)
LcdSend(0, 1); 
}



/*--------------------------------------------------------------------------------------------------
  Name         :  LcdGotoXY 设置块坐标
  Description  :  Sets cursor location to xy location corresponding to basic font size.
  Argument(s)  :  x, y -> Coordinate for new cursor position. Range: 1,1 .. 14,6
  Return value :  None.
--------------------------------------------------------------------------------------------------*/
void LcdGotoXY(unsigned char X, unsigned char Y)
{
LcdSend(0x40 | Y, 0); // column
LcdSend(0x80 | X, 0); // row
}

/*--------------------------------------------------------------------------------------------------
  Name         :  LcdSend
  Description  :  Sends data to display controller.
  Argument(s)  :  data -> Data to be sent
                  cd   -> Command or data (see/use enum)
  Return value :  None.
--------------------------------------------------------------------------------------------------*/
static void LcdSend (unsigned char data, unsigned char command)
{
PORTB &= ~LCD_CE_PIN ; // 使能LCD
if (command == 0)
PORTB &= ~LCD_DC_PIN ; // 传送命令
else
PORTB |= LCD_DC_PIN ; // 传送数据

SPDR = data; // 传送数据到SPI寄存器

while ((SPSR & 0x80) == 0); // 等待数据传送完毕

PORTB |= LCD_CE_PIN ; // 关闭LCD
}
/*--------------------------------------------------------------------------------------------------
  Name         :  Delay
  Description  :  Uncalibrated delay for LCD init routine.
  Argument(s)  :  None.
  Return value :  None.
--------------------------------------------------------------------------------------------------*/
static void Delay ( void )
{
    int i;
    for ( i = -12000; i < 12000; i++ );
}

/*--------------------------------------------------------------------------------------------------
  Name         :  main
  Description  :  
  Argument(s)  :  
  Return value :  None.
--------------------------------------------------------------------------------------------------*/

void main(void)
{  unsigned char X=0,i=0;  //v=0,按行显示，x对应某个bank(0~83)
   LcdInit();
  
   while(1)
  {
    LcdGotoXY(X_Init,Y_Init);
   // for(X=0;X<X_Length;X++)LcdSend(X_TAB[X],1);
   for(i=0;i<100;i++)
   {
    for(X=0;X<5;X++)
    {
     LcdSend(FontLookup[i][X],1);
    }
   }
  }
}