www/example/main.c

   1 #define PBDR   (*((volatile unsigned short *)0x05FFFFC2))
   2
   3 #define DC  1
   4 #define CS1 2
   5 #define SDA 4
   6 #define SCK 8
   7
   8 static const unsigned char ascii2lcd[] = {
   9    0x00,0x01,0x02,0x03,0x00,0x84,0x85,0x89,
  10    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  11    0xec,0xe3,0xe2,0xe1,0xe0,0xdf,0x15,0x00,
  12    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  13    0x24,0x25,0x26,0x37,0x06,0x29,0x2a,0x2b,
  14    0x2c,0x2d,0x2e,0x2f,0x30,0x31,0x32,0x33,
  15    0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,
  16    0x3c,0x3d,0x3e,0x3f,0x40,0x41,0x42,0x43,
  17    0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,
  18    0x4c,0x4d,0x4e,0x4f,0x50,0x51,0x52,0x53,
  19    0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,
  20    0x5c,0x5d,0x5e,0xa9,0x33,0xce,0x00,0x15,
  21    0x00,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,
  22    0x6c,0x6d,0x6e,0x6f,0x70,0x71,0x72,0x73,
  23    0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,
  24    0x7c,0x7d,0x7e,0x24,0x24,0x24,0x24,0x24,
  25    0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,
  26    0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,
  27    0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,
  28    0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,
  29    0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,
  30    0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,
  31    0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,
  32    0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,
  33    0x45,0x45,0x45,0x45,0x45,0x45,0x24,0x47,
  34    0x49,0x49,0x49,0x49,0x4d,0x4d,0x4d,0x4d,
  35    0x48,0x52,0x53,0x53,0x53,0x53,0x53,0x24,
  36    0x24,0x59,0x59,0x59,0x59,0x5d,0x24,0x24,
  37    0x65,0x65,0x65,0x65,0x65,0x65,0x24,0x67,
  38    0x69,0x69,0x69,0x69,0x6d,0x6d,0x6d,0x6d,
  39    0x73,0x72,0x73,0x73,0x73,0x73,0x73,0x24,
  40    0x24,0x79,0x79,0x79,0x79,0x7d,0x24,0x7d
  41 };
  42
  43 void lcd_write(int byte, int data)
  44 {
  45    int i;
  46    char on,off;
  47
  48    PBDR &= ~CS1; /* enable lcd chip select */
  49
  50    if ( data ) {
  51       on=~(SDA|SCK);
  52       off=SCK|DC;
  53    }
  54    else {
  55       on=~(SDA|SCK|DC);
  56       off=SCK;
  57    }
  58    /* clock out each bit, MSB first */
  59    for (i=0x80;i;i>>=1)
  60    {
  61       PBDR &= on;
  62       if (i & byte)
  63          PBDR |= SDA;
  64       PBDR |= off;
  65    }
  66
  67    PBDR |= CS1; /* disable lcd chip select */
  68 }
  69
  70 void lcd_printxy( char x, char y, unsigned char* string, int len )
  71 {
  72    int i;
  73    lcd_write(0xb0+y*16+x,0);
  74    for (i=0; string[i] && i<len; i++)
  75       lcd_write(ascii2lcd[string[i]],1);
  76 }
  77
  78 int main(void)
  79 {
  80    lcd_printxy(0,0,"Open Source",11);
  81
  82    /* simple scroll */
  83    while (1) {
  84       int i,j;
  85       char* string = "  Jukebox    Jukebox  ";
  86       for ( i=0; i<11; i++ ) {
  87          lcd_printxy(0,1,string+i,11);
  88          for (j=0; j<600000; j++);
  89          PBDR ^= 0x40; /* toggle LED (PB6) */
  90       }
  91    }
  92 }
  93
  94 extern const void stack(void);
  95
  96 const void* vectors[] __attribute__ ((section (".vectors"))) =
  97 {
  98    main,        /* Power-on reset */
  99    stack,       /* Power-on reset (stack pointer) */
 100    main,        /* Manual reset */
 101    stack        /* Manual reset (stack pointer) */
 102 };