怎么使用SPI来建立PIC16F1719和RPI之间的通信

以下是SPI代码：void spi_init(){SSPEN=0；//Reset SPI模式TRISDbits.TRISD0=1；//RD0作为SS输入TRISCbits.TRISC5=0；//RC5作为SDO输出TRISCbits.TRISC4=1；//RC4作为SDI输入TRISCbits.TRISC3=1；//RC3作为SCK输入时钟RC5PPS=0x11；//设置RC5作为外围SDO输出SSPCLKPPS0x10;//RC3作为外围CLK SSPSPSPSPSPSPS=0x08，//选择RD0作为SS输入管SS SS输入引脚SSP1STAT=0x40；//选择RD0作为SS SS输入管SS SS SS SS输入管SSP1XXXXP1STAT=0x40；//设置SMP=0，CKE=1注：下6位只读只读SSP1P1CONP1CON1=0X04；//CKP=0，SS ENABLED SSP1IF=0，SS ENABLED SSP1IF SSP1IF=0；SSP1IE=1；PEIE=1；PEIE=1；PEIE=1；PEIE=1；GIE=1；GIE=1；GIE=1；SSPEE=1；SSPEPEIsdBist.TrISD0＝0；而（！）SSP1IF；TEMP= SSPBUF；而（！）SSP1IF；temp=SSPBUF；TRISDbits.TRISD0=1；return temp；}void main(){OSCCONbits.SCS=0x00；OSCCONbits.IRCF=0x0E；spi_init()；//Call SPI初始化函数adc_init()；//Call ADC初始化函数TRISAbits.TRISA4=1；//设置RA4作为同步ANSELAbits的输入。SA4=0；//禁用RA4的模拟驱动程序，而(1)//循环永远{；}}无效中断Isr(void){静态无符号int count=0；无符号int Current[24]；无符号int I,.；无符号char temp；if(SSP1IF){SSP1IF=0；SSP1IE=0；if(RA4&spi_r()==157){for(char i=0；i<24;i++){Current=110;//getCurrent(I_ch);}for(char i=0;i<24;i++){I=getCurrent(I_ch);//Current;temp=SSP1BUF;if(!Ra4）中断；SSP1BUF＝（i；and 0xFF00）& gt；8；而（！）SSP1IF和AM＆RA4）；SSP1IF＝0；TEMP= SSP1BUF；IF（！）RA4）中断；SSP1BUF＝I＆AMP；0x00 FF；而（！）SSP1IF和AM＆RA4）；SSP1IF＝0；} SSP1IF＝0；SSP1IE＝1；}



      以下为原文

    Here's the SPI code:
 
 
void spi_init()
{
    SSPEN = 0; // Reset SPI mode
    TRISDbits.TRISD0 = 1; // RD0 as SS input
    TRISCbits.TRISC5 = 0; //RC5 as SDO output
    TRISCbits.TRISC4 = 1; // RC4 as SDI input
    TRISCbits.TRISC3 = 1; // RC3 as SCK input clock
    RC5PPS = 0x11; // Set RC5 as peripheral SDO out
    SSPCLKPPS = 0x10;// RC3 as peripheral CLK
    SSPSSPPS = 0x08, // Select RD0 as SS  input pin
    
    SSP1STAT = 0x40;// set SMP=0, CKE = 1 Note: the lower 6 bit is read only
    SSP1CON1 = 0x04; // CKP = 0, SS ENABLED
    SSP1IF = 0;
    SSP1IE = 1; 
    PEIE = 1;
    GIE = 1;
    SSPEN = 1;
}

unsigned char spi_r()
{
    unsigned char temp;
    TRISDbits.TRISD0 = 0;
    while(!SSP1IF);
    temp=SSPBUF;
    while(!SSP1IF);
    temp=SSPBUF;
    TRISDbits.TRISD0 = 1;
    return temp;
}
void main ()
{
    OSCCONbits.SCS = 0x00;
    OSCCONbits.IRCF = 0x0E;
    
    spi_init(); // Call SPI initialization function
    adc_init(); // Call ADC initialization function  
   
    TRISAbits.TRISA4 = 1; // Set RA4 as input for the synchronization
    ANSELAbits.ANSA4 = 0; // Disable the analog driver for RA4
    
    while(1) // Loop forever
    {; }
}



void interrupt Isr(void)
{
    static unsigned int count = 0;
    unsigned int Current[24];
    unsigned int I,current;
    unsigned char temp;
    
    if(SSP1IF)
    {
        SSP1IF = 0;
        SSP1IE = 0;
        
        if(RA4 && spi_r() == 157)
        {
            for(char i = 0; i < 24; i++)
            {
                Current = 110;//getCurrent(I_ch);
            }
            
            for(char i = 0; i < 24; i++)
            {
                I = getCurrent(I_ch);//Current;
                temp = SSP1BUF;
                if(!RA4)
                    break;
                SSP1BUF = (I & 0xFF00) >> 8;
                while(!SSP1IF && RA4);
                SSP1IF = 0;
                temp = SSP1BUF;
                if(!RA4)
                    break;
                SSP1BUF = I & 0x00FF;
                while(!SSP1IF && RA4);
                SSP1IF = 0;
            }
        }
        SSP1IF = 0;
        SSP1IE = 1;
     }
}
   

好，那么我应该用轮询代替还是你建议什么？谢谢你的回复。



      以下为原文

    Okay, so should I use polling instead or what do you suggest? Thanks for your reply.

让它使用轮询工作。只有当它工作时，你应该决定是否需要使用中断。



      以下为原文

   
Get it working using polling.
Only once it's working, should you decide if there is a need to use interrupts.
 

好的，我现在就去做。谢谢大家。



      以下为原文

    Okay, I'll do that now. Thanks a lot guys.