2. 1 双击“设计工具盒”中的源文件“LED11. c”,在其右侧将打开编写程序窗口,删除已有的文字注释说明。
2. 2 在源程序窗口输入以下11进制计数器C语言源程序:
#include " htc. h"
void delay( unsigned int i) ;
unsigned char code table [ ] = { 0x40, 0x79, 0x24, 0x30, 0x19, 0x12, 0x02,
0x78, 0x00, 0x90};
unsigned char a1, a2, a3;
void main ( )
{
unsigned int i;
while (1)
{ for( i = 0; i < 11; i + + )
{
if ( i = = 0)
{P2 = 0x40;
P1 = 0x40;
P0 = 0x40; }
if ( i = = 1)
{P2 = 0x79;
P1 = 0x40;
P0 = 0x40; }
if ( i = = 2)
{P2 = 0x24;
P1 = 0x40;
P0 = 0x40;
}
if ( i = = 3)
{
P2 = 0x30;
P1 = 0x40;
P0 = 0x40;
}
if ( i = = 4)
{
P2 = 0x19;
P1 = 0x40;
P0 = 0x40;
}
if ( i = = 5)
{
P2 = 0x12;
P1 = 0x40;
P0 = 0x40;
}
if ( i = = 6)
{
P2 = 0x02;
P1 = 0x40;
P0 = 0x40;
}
if ( i = = 7)
{
P2 = 0x78;
P1 = 0x40;
P0 = 0x40;
}
if ( i = = 8)
{
P2 = 0x00;
P1 = 0x40;
P0 = 0x40;
}
if ( i = = 9)
{
P2 = 0x10;
P1 = 0x40;
P0 = 0x40;
}
if ( i = = 10)
{
P2 = 0x40;
P1 = 0x79;
P0 = 0x40;
i = 0;
}
}
} }
void delay( unsigned int i)
{
while ( i - - ) ;
}