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CAPI DMA memory-to-memory tests. More...
#include <stdint.h>#include <string.h>#include "parameters.h"#include "test_framework.h"#include "test_dma.h"Functions | |
| int | test_dma (void) |
| Run all DMA test cases available on the mapped platform. | |
CAPI DMA memory-to-memory tests.
Exercises the DMA driver using memory-to-memory transfers that require no external hardware. On STM32F7 only DMA2 supports mem-to-mem; the platform layer (parameters.h) selects the correct stream/channel.
Every case moves real bytes through the DMA engine and verifies the destination with memcmp against an oracle held in SRAM – the tests check observable transfer behavior, never the driver's internal state or argument validation. All transfers stay inside SRAM, so the suite needs no wiring.
API coverage: capi_dma_init / capi_dma_deinit - BASIC, LIFECYCLE capi_dma_init_chan / capi_dma_deinit_chan - BASIC, LIFECYCLE capi_dma_config_xfer - all cases capi_dma_xfer_start - all cases (polling path) capi_dma_chan_is_completed - BASIC (lifecycle), all cases capi_dma_xfer_abort - ABORT capi_dma_register_complete_callback - ASYNC (skipped when no IRQ)
Behavior verified: BASIC - incrementing copy + is_completed goes false on config, true after a polled start. PATTERN - 0x00 / 0xFF / 0xAA55 / walking-ones survive intact (no stuck or aliased bits). SIZES - a length sweep copies exactly N bytes and never overruns the destination (guard bytes past N stay untouched). SRC_FIXED - src_inc = NO_INCREMENT replays src[0] into every dst byte. DST_FIXED - dst_inc = NO_INCREMENT lands the last source byte in dst[0] and leaves the rest of dst untouched. REUSE - one channel accepts many config+start cycles back to back. ABORT - abort after completion returns 0 and the channel still works. LIFECYCLE - deinit/re-init resets the singleton; a second init_chan on a live id reports -EBUSY and an out-of-range id reports -EINVAL. ASYNC - IRQ-delivered completion via a registered callback (only on platforms whose backend has an IRQ completion path).
Copyright (c) 2026 Analog Devices, Inc. SPDX-License-Identifier: BSD-3-Clause
| int test_dma | ( | void | ) |
Run all DMA test cases available on the mapped platform.