请问一下TLSR8258怎样做SPI从机？

we_1802397876

_attribute_ram_code_sec_noinline_ void irq_handler(void)

{

 irq_cnt ++;

 unsigned char  irq_status = reg_spi_slave_irq_status;

 //An interrupt is triggered after each master spi write or read is completed (CS changes from low to high).

 //Note that it is unable to distinguish which condition triggers it.

 if(irq_status & FLD_SLAVE_SPI_IRQ)

 {

  reg_spi_slave_irq_status = irq_status;

  spi_irq_cnt ++;

  spi_slave_irq_handler();

 }

}



volatile unsigned char  buff[SPI_BUFFER_CNT] __attribute__((section(".spi_slave_buff")));

unsigned char slave_buf[SPI_BUFFER_CNT];



void spi_slave_irq_handler(void)

{

 /*if(buff[0]==SPI_DATA_HEAD){//Judge whether DataHead is correct.

  slave_rx_length=buff[1];

  if( buff[slave_rx_length-1]==SPI_DATA_END ){//Judge whether DataEnd is correct.

   for(int i=0;i<slave_rx_length;i++){

    if(slave_buf!=buff){//Get data that Master SPI writes to Slave.

     slave_buf=buff;//If Master data has been updated, copy data to slave buff.

    }

   }

  }

 }*/

 memcpy(slave_buf, (void *)buff, SPI_BUFFER_CNT);

 spi_slave_received = 1;

}

怎样才能读数据呢？
slave模式下，中断倒是能触发，CS从低到高时触发一次，但是buff里面什么都没有啊！！！要怎么样才能把数据取出来呢？

we_1802397876

eclipse里面只能看到SPI_V1.0的SPI_Demo。
实际上文件夹里面还有一个SPI_V1.1的SPI_Demo，eclipse里面看不到，里面有app_dma.c，代码更完整。

服了。。。。。。

we_1802397876

删除C:\Users\oct1158\Downloads\tc_platform_sdk-V3.3.1\demo\vendor\SPI_Demo\SPI_V1.0\SPI_Demo
然后把C:\Users\oct1158\Downloads\tc_platform_sdk-V3.3.1\demo\vendor\SPI_Demo\SPI_V1.1\SPI_Demo导入工程。

we_1802397876

但是SPI_V1.1\SPI_Demo里面也只有spi主机的代码，一旦选择#define SPI_DEVICE SPI_SLAVE_DEVICE，就把所有的代码屏蔽完了。
./boot/cstartup_flash.o: In function `start_suspend':
(.vectors+0x212): undefined reference to `irq_handler'
./vendor/SPI_V1.1_Demo/main.o: In function `main':
main.c.text.main+0xe): undefined reference to `user_init'
main.c.text.main+0x12): undefined reference to `main_loop'
make[1]: *** [B85_Driver_Demo.elf] Error 1
make: *** [all] Error 2
"make all" terminated with exit code 2. Build might be incomplete.