PIC16LF1824 SPI从属接口

在PIC16LF1824单片机上，使用MPLAB MCC生成SPI从属码。然而，目前还不清楚如何使用这些API。最重要的是，当一个中断被SPI接口触发时，数据将如何被应用程序读取，它在哪里被存储或被访问？其目的是当主机启动SPI传输时，从MCU被中断，它应该通过SPI读取数据并将其存储在一个数组中，这将被应用程序用于其他操作，例如确定设备ID和数据包的内容。不幸的是，我找不到。任何MCC生成的API的代码片段的任何文档。如果提供了如何使用ISR通过SPI接收数据包的代码片段，我将非常感激。上面的任何代码截断或示例都将非常感谢。
                    
                    
               
                                                                                      以下为原文

                                                                            I have generated the SPI Slave code using MPLAB MCC for PIC16LF1824 MCU. However, what is unclear is as to how to use these APIs.
Most importantly, when an interrupt is triggered by the SPI interface, how the data will be read by the application and where is it stored or can be accessed? The aim is when the master starts the SPI transfer, slave MCU is interrupted, and it should read the data via SPI and store it in an array, which will be then used by my application for other operations such as determining the device ID and the contents of the packet.

    if(PIE1bits.SSP1IE == 1 && PIR1bits.SSP1IF == 1)
    {
        SPI_ISR();
        PIR1bits.SSP1IF=0; // clear SSP interrupt bit
    }

Unfortunately,I could not find any documentation of code snippet of this APIs generated by the MCC.
I would be really grateful if any resources or code snippet as to how to use the ISR to received the data packet via the SPI is provided.

uint8_t (*SPI_xchgHandler)(uint8_t);
void SPI_Initialize(void)
{
    SSP1STAT = 0x00;
    SSP1CON1 = 0x34;
    SSP1CON3 = 0x00;

SSP1BUF = DUMMY_DATA;
SPI_setExchangeHandler(SPI_DefaultExchangeHandler);

PIE1bits.SSP1IE = 1;
}

void SPI_ISR(void)
{
        SSP1BUF = SPI_xchgHandler(SSP1BUF);
}

void SPI_setExchangeHandler(uint8_t (* InterruptHandler)(uint8_t)){
    SPI_xchgHandler = InterruptHandler;
}

uint8_t SPI_DefaultExchangeHandler(uint8_t byte){
    // add your SPI interrupt custom code
    // or set custom function using SPI_setExchangeHandler()
    return byte;
}

Any code snipped or examples on above will be really grateful.