6.6. DMA example¶
6.6.1. Overview¶
DMA example project shows transfer data with unchined and chained way. This example checks if the data transferred by DMA is correct.
6.6.2. Board Setting¶
No special settings
6.6.3. 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 0x10c2000 to 0x40100000, burst size: 8192 bytes
rw throughput: 191056.66 KB/s
compare data between source address 0x10c2000 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3000 to 0x40100000, burst size: 4096 bytes
rw throughput: 191401.87 KB/s
compare data between source address 0x10c3000 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3800 to 0x40100000, burst size: 2048 bytes
rw throughput: 191068.54 KB/s
compare data between source address 0x10c3800 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3c00 to 0x40100000, burst size: 1024 bytes
rw throughput: 190629.85 KB/s
compare data between source address 0x10c3c00 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3e00 to 0x40100000, burst size: 512 bytes
rw throughput: 189993.20 KB/s
compare data between source address 0x10c3e00 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3f00 to 0x40100000, burst size: 256 bytes
rw throughput: 188316.07 KB/s
compare data between source address 0x10c3f00 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3f80 to 0x40100000, burst size: 128 bytes
rw throughput: 185283.47 KB/s
compare data between source address 0x10c3f80 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3fc0 to 0x40100000, burst size: 64 bytes
rw throughput: 142678.00 KB/s
compare data between source address 0x10c3fc0 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3fe0 to 0x40100000, burst size: 32 bytes
rw throughput: 115077.73 KB/s
compare data between source address 0x10c3fe0 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3ff0 to 0x40100000, burst size: 16 bytes
rw throughput: 84911.14 KB/s
compare data between source address 0x10c3ff0 and destination address 0x40100000: all data matches
dma transferring data from 0x10c3ff8 to 0x40100000, burst size: 8 bytes
rw throughput: 53096.43 KB/s
compare data between source address 0x10c3ff8 and destination address 0x40100000: all data matches
read testing
dma transferring data from 0x40102000 to 0x10c0000, burst size: 8192 bytes
rw throughput: 178014.72 KB/s
compare data between source address 0x40102000 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103000 to 0x10c0000, burst size: 4096 bytes
rw throughput: 177757.20 KB/s
compare data between source address 0x40103000 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103800 to 0x10c0000, burst size: 2048 bytes
rw throughput: 177603.05 KB/s
compare data between source address 0x40103800 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103c00 to 0x10c0000, burst size: 1024 bytes
rw throughput: 177295.55 KB/s
compare data between source address 0x40103c00 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103e00 to 0x10c0000, burst size: 512 bytes
rw throughput: 177275.09 KB/s
compare data between source address 0x40103e00 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103f00 to 0x10c0000, burst size: 256 bytes
rw throughput: 176714.22 KB/s
compare data between source address 0x40103f00 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103f80 to 0x10c0000, burst size: 128 bytes
rw throughput: 174674.48 KB/s
compare data between source address 0x40103f80 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103fc0 to 0x10c0000, burst size: 64 bytes
rw throughput: 131035.66 KB/s
compare data between source address 0x40103fc0 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103fe0 to 0x10c0000, burst size: 32 bytes
rw throughput: 102444.39 KB/s
compare data between source address 0x40103fe0 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103ff0 to 0x10c0000, burst size: 16 bytes
rw throughput: 68524.01 KB/s
compare data between source address 0x40103ff0 and destination address 0x10c0000: all data matches
dma transferring data from 0x40103ff8 to 0x10c0000, burst size: 8 bytes
rw throughput: 38964.99 KB/s
compare data between source address 0x40103ff8 and destination address 0x10c0000: all data matches
chained transfer
dma setup channel done
compare data between source address 0x10c0000 and destination address 0x40100000: all data matches
[0]: data match
compare data between source address 0x10c1000 and destination address 0x40120000: all data matches
[1]: data match
compare data between source address 0x10c2000 and destination address 0x40140000: all data matches
[2]: data match
compare data between source address 0x10c3000 and destination address 0x40160000: all data matches
[3]: data match
dma example end