首页so the ram memory starting address is not always the same as it physical address?

so the ram memory starting address is not always the same as it physical address?

时间: 2024-06-05 22:11:15 浏览: 71

DMA.rar_The Show_dma_dma flash ram_pending_ram dma

This example provides a description of how to use a DMA channel to transfer a word data buffer from memory (Flash) to memory (RAM). The dedicated DMA channel is configured to transfer once a time a 32 word data buffer stored as constant in the Flash memory to another buffer in the RAM memory. The received data are stored in the DST_Buffer. The DMA channel transfer complete interrupt is enabled to generate an interrupt at the end of the buffer transfer. As soon as the transfer is completed an interrupt is generated and in the DMA channel interrupt routine the transfer complete interrupt pending bit is cleared. The data counter is stored before and after the transfer to show that all data has been transfered. TransferStatus gives the data transfer status where it is PASSED if transmitted and received data are the same otherwise it is FAILED

That's correct. In some systems, the RAM memory starting address may not be the same as its physical address due to the use of virtual memory. Virtual memory allows the operating system to use a portion of the hard drive as if it were RAM, which can help increase the amount of available memory for running applications. When an application requests memory, the operating system maps a portion of the virtual memory to a physical address in RAM. This mapping process allows the application to access the memory as if it were physically located in RAM, even though it may be located on the hard drive.

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