8.1. DMA General Transfer

8.1.1. Overview

DMA example project shows transfer data with unchined and chained way. This example checks if the data transferred by DMA is correct.

8.1.2. Board Setting

No special settings

8.1.3. Running the example

When the project runs correctly, and the serial port terminal will output the following information:

dma example start
unchained transfer
write testing
dma transferring data from 0x82000 to 0x1100000, burst size: 8192 bytes
rw throughput: 534818.93 KB/s
compare data between source address 0x82000 and destination address 0x1100000:  all data matches
dma transferring data from 0x83000 to 0x1100000, burst size: 4096 bytes
rw throughput: 535191.62 KB/s
compare data between source address 0x83000 and destination address 0x1100000:  all data matches
dma transferring data from 0x83800 to 0x1100000, burst size: 2048 bytes
rw throughput: 534446.75 KB/s
compare data between source address 0x83800 and destination address 0x1100000:  all data matches
dma transferring data from 0x83c00 to 0x1100000, burst size: 1024 bytes
rw throughput: 532593.62 KB/s
compare data between source address 0x83c00 and destination address 0x1100000:  all data matches
dma transferring data from 0x83e00 to 0x1100000, burst size: 512 bytes
rw throughput: 528561.62 KB/s
compare data between source address 0x83e00 and destination address 0x1100000:  all data matches
dma transferring data from 0x83f00 to 0x1100000, burst size: 256 bytes
rw throughput: 520677.96 KB/s
compare data between source address 0x83f00 and destination address 0x1100000:  all data matches
dma transferring data from 0x83f80 to 0x1100000, burst size: 128 bytes
rw throughput: 504930.96 KB/s
compare data between source address 0x83f80 and destination address 0x1100000:  all data matches
dma transferring data from 0x83fc0 to 0x1100000, burst size: 64 bytes
rw throughput: 381520.12 KB/s
compare data between source address 0x83fc0 and destination address 0x1100000:  all data matches
dma transferring data from 0x83fe0 to 0x1100000, burst size: 32 bytes
rw throughput: 256341.78 KB/s
compare data between source address 0x83fe0 and destination address 0x1100000:  all data matches
dma transferring data from 0x83ff0 to 0x1100000, burst size: 16 bytes
rw throughput: 154776.29 KB/s
compare data between source address 0x83ff0 and destination address 0x1100000:  all data matches
dma transferring data from 0x83ff8 to 0x1100000, burst size: 8 bytes
rw throughput: 86360.06 KB/s
compare data between source address 0x83ff8 and destination address 0x1100000:  all data matches
read testing
dma transferring data from 0x1102000 to 0x80000, burst size: 8192 bytes
rw throughput: 523160.75 KB/s
compare data between source address 0x1102000 and destination address 0x80000:  all data matches
dma transferring data from 0x1103000 to 0x80000, burst size: 4096 bytes
rw throughput: 523517.37 KB/s
compare data between source address 0x1103000 and destination address 0x80000:  all data matches
dma transferring data from 0x1103800 to 0x80000, burst size: 2048 bytes
rw throughput: 522804.62 KB/s
compare data between source address 0x1103800 and destination address 0x80000:  all data matches
dma transferring data from 0x1103c00 to 0x80000, burst size: 1024 bytes
rw throughput: 521031.21 KB/s
compare data between source address 0x1103c00 and destination address 0x80000:  all data matches
dma transferring data from 0x1103e00 to 0x80000, burst size: 512 bytes
rw throughput: 516129.03 KB/s
compare data between source address 0x1103e00 and destination address 0x80000:  all data matches
dma transferring data from 0x1103f00 to 0x80000, burst size: 256 bytes
rw throughput: 507600.78 KB/s
compare data between source address 0x1103f00 and destination address 0x80000:  all data matches
dma transferring data from 0x1103f80 to 0x80000, burst size: 128 bytes
rw throughput: 486383.78 KB/s
compare data between source address 0x1103f80 and destination address 0x80000:  all data matches
dma transferring data from 0x1103fc0 to 0x80000, burst size: 64 bytes
rw throughput: 366412.21 KB/s
compare data between source address 0x1103fc0 and destination address 0x80000:  all data matches
dma transferring data from 0x1103fe0 to 0x80000, burst size: 32 bytes
rw throughput: 246232.76 KB/s
compare data between source address 0x1103fe0 and destination address 0x80000:  all data matches
dma transferring data from 0x1103ff0 to 0x80000, burst size: 16 bytes
rw throughput: 147041.93 KB/s
compare data between source address 0x1103ff0 and destination address 0x80000:  all data matches
dma transferring data from 0x1103ff8 to 0x80000, burst size: 8 bytes
rw throughput: 81606.64 KB/s
compare data between source address 0x1103ff8 and destination address 0x80000:  all data matches
chained transfer
 dma setup channel done
compare data between source address 0x1040000 and destination address 0x1100000:  all data matches
 [0]: data match
compare data between source address 0x1041000 and destination address 0x1108000:  all data matches
 [1]: data match
compare data between source address 0x1042000 and destination address 0x1110000:  all data matches
 [2]: data match
dma example end