关于stc spi 的从机发射
用82g516做主机,15w408s做从机,用pc串口发出01,从机接收没有问题,主机接收就是永远也是不同,各位知道如何解决?master use 82g516
#include "reg51.h"
typedef unsigned char BYTE;
sfrAUXR = 0x8E; //Auxiliary register
sfr SPSTAT = 0x84; //SPI status register82G516
sfr SPCTL = 0x85; //SPI control register 82G516
sfr SPDAT = 0x86; //SPI data register 82G516
#define SPIF 0x80 //SPSTAT.7
#define WCOL 0x40 //SPSTAT.6
#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 = P1^3; //SPI slave select, connect to slave' SS(P1.4) pin
void InitUart();
void InitSPI();
void SendUart(BYTE dat); //send data to PC
BYTE RecvUart(); //receive data from PC
BYTE SPISwap(BYTE dat); //swap SPI data between master and slave
///////////////////////////////////////////////////////////
void main()
{
InitUart(); //initial UART
InitSPI(); //initial SPI
while (1)
{
SendUart(SPISwap(RecvUart()));
}
}
///////////////////////////////////////////////////////////
void InitUart()
{
SCON = 0x50; //8_bit data,mode_1 all 10_bit
TMOD = 0x21; //T1_mode_2 ,8bit auto_reload T0_mode_1 ,16bit_timer
PCON = 0x00;
TH1 = TL1 = 0xFD; //9600byte
ES = 1; //serial_port_open_interrupt
TR1 = 1;
TI =0;
}
///////////////////////////////////////////////////////////
void InitSPI()
{
SPDAT = 0; //initial SPI data
SPSTAT = SPIF | WCOL; //clear SPI status
SPCTL = SPEN | MSTR | SPDLL; //master mode + spi_rate
}
///////////////////////////////////////////////////////////
void SendUart(BYTE dat)
{
SBUF = dat;
while (!TI); //wait pre-data sent
TI = 0; //clear TI flag
// SBUF = dat; //send current data
}
///////////////////////////////////////////////////////////
BYTE RecvUart()
{
while (!RI); //wait receive complete
RI = 0; //clear RI flag
return SBUF; //return receive data
}
///////////////////////////////////////////////////////////
BYTE SPISwap(BYTE dat)
{
SPISS = 0; //pull low slave SS
SPDAT = dat; //trigger SPI send
while (!(SPSTAT & 0x80));//SPIF)); //wait send complete
SPSTAT = 0xC0; //SPIF | WCOL; //clear SPI status
SPISS = 1; //push high slave SS
return SPDAT; //return received SPI data
}
slave use 15w408s
#include "reg51.h" //
typedef unsigned char BYTE;
sfrAUXR = 0x8E; //Auxiliary register
sfr SPSTAT = 0xCD; //SPI status register15F__0x84
sfr SPCTL = 0xCE; //SPI control register 15F__0x85
sfr SPDAT = 0xCF; //SPI data register 15F__0x86
//sfr SPSTAT = 0x84; //SPI status register82G516__0x84
//sfr SPCTL = 0x85; //SPI control register 82G516__0x85
//sfr SPDAT = 0x86; //SPI data register 82G516__0x86
#define SPIF 0x80 //SPSTAT.7
#define WCOL 0x40 //SPSTAT.6
#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
void InitSPI();
BYTE SPISwap(BYTE dat); //swap SPI data between master and slave
BYTE data COUNTER_DATA;
///////////////////////////////////////////////////////////
void main()
{
InitSPI(); //initial SPI
COUNTER_DATA = 0;
while (1)
{
P2 = ~SPISwap(0x22); // send previous SPI data to master)
P0 = ~COUNTER_DATA++;
}
}
///////////////////////////////////////////////////////////
void InitSPI()//SLAVE
{
SPDAT = 0; //initial SPI data
SPSTAT = SPIF | WCOL; //clear SPI status
SPCTL = SPEN; //slave mode
}
///////////////////////////////////////////////////////////
BYTE SPISwap(BYTE dat)
{
SPDAT = dat; //trigger SPI send
while (!(SPSTAT & 0x80));//SPIF)); //wait send complete
SPSTAT = 0xC0; //SPIF | WCOL; //clear SPI status
return SPDAT; //return received SPI data
}
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