这里有一个正弦波的产生程序，经编译，无错误无警告，但是我不清楚如何用单片机管脚输出，程序中定义的输出管脚3.0并没有在程序中用到，想麻烦各位帮我看一下，如何将波形输出。程序如下：
#include<reg51.h>
#include<absacc.h>
#define uchar unsigned char
#define uint unsigned int
#define DA_PORT XBYTE[0xf218]
sbit OUT=P3^0;
sbit ll=P3^1;
uchar code sin[256]={
0x80, 0x83, 0x86, 0x89, 0x8c, 0x8f, 0x92, 0x95,
0x98, 0x9c, 0x9f, 0xa2, 0xa5, 0xa8, 0xab, 0xae,
0xb0, 0xb3, 0xb6, 0xb9, 0xbc, 0xbf, 0xc1, 0xc4,
0xc7, 0xc9, 0xcc, 0xce, 0xd1, 0xd3, 0xd5, 0xd8,
0xda, 0xdc, 0xde, 0xe0, 0xe2, 0xe4, 0xe6, 0xe8,
0xea, 0xec, 0xed, 0xef, 0xf0, 0xf2, 0xf3, 0xf4,
0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfc,
0xfd, 0xfe, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xfe,
0xfd, 0xfc, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8, 0xf7,
0xf6, 0xf5, 0xf3, 0xf2, 0xf0, 0xef, 0xed, 0xec,
0xea, 0xe8, 0xe6, 0xe4, 0xe3, 0xe1, 0xde, 0xdc,
0xda, 0xd8, 0xd6, 0xd3, 0xd1, 0xce, 0xcc, 0xc9,
0xc7, 0xc4, 0xc1, 0xbf, 0xbc, 0xb9, 0xb6, 0xb4,
0xb1, 0xae, 0xab, 0xa8, 0xa5, 0xa2, 0x9f, 0x9c,
0x99, 0x96, 0x92, 0x8f, 0x8c, 0x89, 0x86, 0x83,
0x80, 0x7d, 0x79, 0x76, 0x73, 0x70, 0x6d, 0x6a,
0x67, 0x64, 0x61, 0x5e, 0x5b, 0x58, 0x55, 0x52,
0x4f, 0x4c, 0x49, 0x46, 0x43, 0x41, 0x3e, 0x3b,
0x39, 0x36, 0x33, 0x31, 0x2e, 0x2c, 0x2a, 0x27,
0x25, 0x23, 0x21, 0x1f, 0x1d, 0x1b, 0x19, 0x17,
0x15, 0x14, 0x12, 0x10, 0x0f, 0x0d, 0x0c, 0x0b,
0x09, 0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x03,
0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
0x02, 0x03, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0c, 0x0d, 0x0e, 0x10, 0x12, 0x13,
0x15, 0x17, 0x18, 0x1a, 0x1c, 0x1e, 0x20, 0x23,
0x25, 0x27, 0x29, 0x2c, 0x2e, 0x30, 0x33, 0x35,
0x38, 0x3b, 0x3d, 0x40, 0x43, 0x46, 0x48, 0x4b,
0x4e, 0x51, 0x54, 0x57, 0x5a, 0x5d, 0x60, 0x63,
0x66, 0x69, 0x6c, 0x6f, 0x73, 0x76, 0x79, 0x7c,
};
uint step =1;
float a = 1.0;
void delay(uint m);
void sinwave();
void main()
{
ll=0;
while(1)
{
sinwave();
}
}
void delay(uint m)
{
uint i , j;
for(i = 0; i < m; i++)
for(j = 0; j < 120; j++);
}
void sinwave()
{
uchar t;
uint i;
for(t= 0; t< 256; t= t+ 1)
{
for(i = 0 ; i < step ; i++) DA_PORT = (sin[t]*a);
}
}
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