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有个地方不是很明白,就是disk_write这里,写完之后为什么是调用SD_WaitReadOperation这个函数进行检查是否完成,而不是调用SD_WaitWriteOperation进行监测呢?
驱动文件上写的是用SD_WaitWriteOperation。
- *
- * E - Programming Model (Selecting DMA for SDIO data Transfer)
- * ============================================================
- * Status = SD_Init(); // Initialization Step as described in section A
- *
- * // SDIO Interrupt ENABLE
- * NVIC_InitStructure.NVIC_IRQChannel = SDIO_IRQn;
- * NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
- * NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
- * NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- * NVIC_Init(&NVIC_InitStructure);
- * // DMA2 STREAMx Interrupt ENABLE
- * NVIC_InitStructure.NVIC_IRQChannel = SD_SDIO_DMA_IRQn;
- * NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- * NVIC_Init(&NVIC_InitStructure);
- *
- * // Write operation as described in Section C
- * Status = SD_WriteBlock(buffer, address, 512);
- * Status = SD_WaitWriteOperation();
- * while(SD_GetStatus() != SD_TRANSFER_OK);
- *
- * Status = SD_WriteMultiBlocks(buffer, address, 512, NUMBEROFBLOCKS);
- * Status = SD_WaitWriteOperation();
- * while(SD_GetStatus() != SD_TRANSFER_OK);
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