The DMA test performs test on DMA block using DW transfers.
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The DMA block test procedure:
1) A destination 64-byte block is set to 0 with DW transfers using 16 x 32-bit
transfers from a fixed address.
2) The destination block is verified to be all 0.
3) The same destination block is filled with 00 00 ff by using an 8-bit DMA from a fixed
address with increment 3 and length 22 (64+(3-1))/3.
4) The destination block is verified to contain the correct pattern (shown below with the lowest
address first):
ff0000ff0000ff0000ff0000ff0000ff0000ff0000ff0000…
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#define | SELFTEST_DMA_DW_TIMEOUT (50UL) |
| | Timeout in microseconds for DMA transfer completion.
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