PIC24FJ128GA308无法从SPI1输出到SCK工作

嗨，从PIC24FJ128GA308，我尝试使用引脚：-RG6（RP21）作为SCK1输出-RG7（RP26）作为SDI1输入-RG8（RP19）作为SDO1 OutPurthOver，SCK1不计时。Sdo1的输出工作很好。初始化是通过写给SPI的代码完成的：在循环这个例程时增加了“值”，我看到SDO输出递增，但是没有SDKSB输出SK1到RP21的SCKSWACK SCK1，但是在RP19上仍然没有时钟。一个初始化“SOWWeY”，但是在哪里？



      以下为原文

    Hi,
From the PIC24FJ128GA308 I try to use the pins:
- RG6 (RP21) as the SCK1 output
- RG7 (RP26) as the SDI1 input
- RG8 (RP19) as the SDO1 output

However, the SCK1 doesn't clock. The SDO1 output works fine.

Initializing is done by:
    TRISG=0b1111111010111111; //

    // Unlock Registers
    asm volatile( "MOV #OSCCON, w1 n"
        "MOV #0x46, w2 n"
        "MOV #0x57, w3 n"
        "MOV.b w2, [w1] n"
        "MOV.b w3, [w1] n"
        "BCLR OSCCON,#6") ;
    // or use C30 built-in macro:
    // __builtin_write_OSCCONL(OSCCON & 0xbf);

    // Configure Input Functions (Table 11-2))
    RPINR20bits.SDI1R = 26; // assign SDI1 to RP26
    RPOR9bits.RP19R = 7; // assign SDO1 to RP19
    RPOR10bits.RP21R = 8; // assign SCK1 to RP21

    // Lock Registers
    asm volatile ("MOV #OSCCON, w1 n"
        "MOV #0x46, w2 n"
        "MOV #0x57, w3 n"
        "MOV.b w2, [w1]n"
        "MOV.b w3, [w1]n"
        "BSET OSCCON, #6") ;
    // or use C30 built-in macro:
    // __builtin_write_OSCCONL(OSCCON | 0x40);

    /* Initialize peripherals */
    CM1CON=0x0000;
    ANSA=0x0000;
    ANSB=0x000F;
    ANSD=0x0000;
    ANSD=0x0000;
    ANSG=0x0000;
   
    /* initialize SPI1 */
    SPI1STAT=0x0000;
    SPI1CON1=0b0001000000111011;
    SPI1CON2=0x0000;
    SPI1STATbits.SPIEN = 1; //enable SPI mode


The code that writes to the SPI:




void DAC(unsigned char channel, unsigned int value)
{
    unsigned char Bh=0;
     unsigned char Bl=0;

     Bh=0x03 | (value>>6);
     Bl=(value & 0x003F) << 2;



    DAC_CS=DAC_SC_SELECT;



    SPI1BUF=Bh;
     while(SPI1STATbits.SPITBF);



    SPI1BUF=Bl;
     while(SPI1STATbits.SPITBF);



    DAC_CS=DAC_SC_IDLE;
     __delay_us(1);
     DAC_LDAC=DAC_LDAC_LOAD;
     __delay_us(1);
     DAC_LDAC=DAC_LDAC_IDLE;
}





When looping this routine with incrementing 'value' I see the SDO output incrementing, but there is no SCK

Swapping SCK1 with SDO1 by




    RPOR9bits.RP19R = 8; // assign SCK1 to RP19
    RPOR10bits.RP21R = 7; // assign SDO1 to RP21




Outputs SDO1 to RP21, but then there is still no clock on RP19.

Probably I'm missing an initialisation 'somwehere' but where?