单片机串口与spi通信程序问题

ID:1074103 · 发表于 2023-4-25 21:11

想实现计算机通过串口向主单片机发送一串数据，主单片机串口每收到一个字节就立刻把收到的通过spi发到从单片机；同时主单片机把收到的从单片机字节发送到计算机，求求各位大佬帮帮孩子，为什么实现不了
#include "STC15F2K60S2.H"
#include "intrins.h"
#define MASTER
#define FOSC 18432000L
#define BAUD (256-FOSC/32/115200)
#define SPIF       0x80
#define WCOL       0x40
#define SSIG       0x80       //SPCTL.7
#define SPEN       0x40       //SPCTL.6
#define DORD       0x20       //SPCTL.5
#define MSTR       0x10       //SPCTL.4
#define CPOL       0x08       //SPCTL.3
#define CPHA       0x04       //SPCTL.2
#define SPDHH    0x00       //CPU_CLK/4
#define SPDH       0x01       //CPU_CLK/16
#define SPDL       0x02       //CPU_CLK/64
#define SPDLL    0x03       //CPU_CLK/128
sbit SPISS = P1^6;

void UartInit(void)             //4800bps@12.000MHz
{
      SCON = 0x50;             //8???,?????
      AUXR |= 0x40;             //???1???Fosc,?1T
      AUXR &= 0xFE;             //??1?????1???????
      TMOD &= 0x0F;             //?????1?16???????
      TL1 = 0x8F;             //??????
      TH1 = 0xFD;             //??????
      ET1 = 0;             //?????1??
      TR1 = 1;             //?????1
}

void InitSPI()
{
SPDAT = 0;
SPSTAT = SPIF | WCOL;
#ifdef MASTER
SPCTL = SPEN | MSTR;
#else
SPCTL = SPEN;
#endif
}
void SendUart(unsigned char dat)
{
while (!TI);
TI=0;
SBUF = dat;
}

unsigned char RecvUart()
{
while (!RI);
RI = 0;
return SBUF;
}
unsigned char SPISwap(unsigned char dat)
{
#ifdef MASTER
SPISS = 0;
#endif
SPDAT = dat;
while (!(SPSTAT&SPIF));
SPSTAT = SPIF|WCOL;
#ifdef MASTER
SPISS = 1;
#endif
return SPDAT;
}
void main()
{
      UartInit();
      InitSPI();
      while(1)
      {
            #ifdef MASTER
            SendUart(SPISwap(RecvUart()));
            #else
            ACC=SPISwap(ACC);
            #endif
      }
}