dspic33ep上的FatFs无法正常工作

我有一个DSPIC33 EP256MU806，我正试图使用FATFS库将文件写入SD卡。我已经有了Microchip的MLA库，但是写速度不够，所以我要修改FATFS。当我尝试做fyMAMT时，它会返回FrxNothRead，这意味着硬件层中的一些东西配置得不好。我使用的是FCY= 16MHz，并且我检查了SPI时钟是使用了33kHz。一个示波器。下面的两个配置都在我的主叫中被调用。这是我的SPI配置：这里是我的PPS配置：我重新定义了TX和RX函数来使用MCC生成的函数：有人知道我做错了什么吗？



      以下为原文

    I have a dspic33ep256mu806 and I'm trying to write a file to an sd card using the FatFs library. I've already got microchip's mla library working but the write speed wasn't enough so I'm changing to fatfs.
When I try to do f_mount, it returns FR_NOT_READY, meaning that something in the hardware layer is poorly configured.

I'm using FCY = 16MHz and I've checked that the SPI clock is 333KHz using an oscilloscope.
Both configurations below are being called in the beginning of my main.

Here is my SPI configuration:

SPI1STATbits.SPIEN = 0; //Assure module is disabled

    /* SPI1CON1 */
    SPI1CON1bits.DISSCK = 0;
    SPI1CON1bits.DISSDO = 0;
    SPI1CON1bits.MODE16 = 0;
    SPI1CON1bits.SSEN = 0;
    SPI1CON1bits.MSTEN = 1;
    /* Timing configuration */
    SPI1CON1bits.CKP = 0;
    SPI1CON1bits.CKE = 1;
    SPI1CON1bits.SMP = 0;

    /* Chose baudrate prescalers */
    SPI1CON1bits.PPRE = 1;
    SPI1CON1bits.SPRE = 5;

    /* SPI1CON2 */
    SPI1CON2bits.FRMEN = 0; // Disable all framed SPI support
    SPI1CON2bits.SPIBEN = 1; // Enhanced mode is enabled

    /* SPI1STAT */
    SPI1STATbits.SPISIDL = 0; // continue operation in Idle
    SPI1STATbits.SPIROV = 0; // Clear overflow
    SPI1STATbits.SISEL = 0b011; // Set interrupt to SPI receive buffer full is set (Not used)

    SPI1STATbits.SPIEN = 1;

Here is my PPS configuration:

/* Configure SPI Pins */
/* SDI - E6(RP86)
* SDO - E4(RP84)
* SCK - E5(RP85)
* CS - E7(RP86)
*/

LATEbits.LATE7 = 1;
TRISEbits.TRISE7 = 0;

TRISEbits.TRISE6 = 1;
TRISEbits.TRISE4 = 0;
TRISEbits.TRISE5 = 0;

PPSUnLock;
PPSInput(IN_FN_PPS_SDI1, IN_PIN_PPS_RP86);
PPSOutput(OUT_FN_PPS_SDO1, OUT_PIN_PPS_RP84);
PPSInput(IN_FN_PPS_SCK1, IN_PIN_PPS_RP85);
PPSOutput(OUT_FN_PPS_SCK1, OUT_PIN_PPS_RP85);
PPSLock;



I've redefined the tx and rx functions to use the MCC generated function:


void SPI1_Exchange( uint8_t *pTransmitData, uint8_t *pReceiveData )
{

    while( SPI1STATbits.SPITBF == true )
    {

    }

    if (SPI1_TransferModeGet() == SPI_TRANSFER_MODE_16BIT)
        SPI1BUF = *((uint16_t*)pTransmitData);
    else
        SPI1BUF = *((uint8_t*)pTransmitData);

    while ( SPI1STATbits.SRXMPT == true);

    if (SPI1_TransferModeGet() == SPI_TRANSFER_MODE_16BIT)
        *((uint16_t*)pReceiveData) = SPI1BUF;
    else
        *((uint8_t*)pReceiveData) = SPI1BUF;

    return;
}
uint8_t sd_rx(){

    uint8_t receive;
    SPI1_Exchange(NULL, &receive);
   
    return receive;
}

void sd_tx(uint8_t data){

    SPI1_Exchange(&data, NULL);
}


Anyone's got an idea of what I'm doing wrong?