diff options
| -rw-r--r-- | tests/ports/stm32_hardware/dma_alignment.py | 88 | ||||
| -rw-r--r-- | tests/ports/stm32_hardware/dma_alignment.py.exp | 2 |
2 files changed, 52 insertions, 38 deletions
diff --git a/tests/ports/stm32_hardware/dma_alignment.py b/tests/ports/stm32_hardware/dma_alignment.py index 1836b25d8..1c271d48e 100644 --- a/tests/ports/stm32_hardware/dma_alignment.py +++ b/tests/ports/stm32_hardware/dma_alignment.py @@ -1,43 +1,59 @@ -from machine import SPI # Regression test for DMA for DCache coherency bugs with cache line # written originally for https://github.com/micropython/micropython/issues/13471 # IMPORTANT: This test requires SPI2 MISO (pin Y8 on Pyboard D) to be connected to GND +import unittest +from machine import SPI + SPI_NUM = 2 +BAUDRATE = 5_000_000 + + +class Test(unittest.TestCase): + @classmethod + def setUpClass(cls): + cls.spi = SPI(SPI_NUM, baudrate=BAUDRATE) + cls.skip_slow_test = False + + def test_variable_offset_fixed_length(self): + buf = bytearray(1024) + for offs in range(0, len(buf)): + v = memoryview(buf)[offs : offs + 128] + self.spi.readinto(v, 0xFF) + ok = all(b == 0x00 for b in v) + if not ok: + print(offs, v.hex()) + self.skip_slow_test = True + self.assertTrue(ok) + + def test_variable_offset_and_lengths(self): + # this takes around 30s to run, so skipped if already failing + if self.skip_slow_test: + self.skipTest("already failing") + + buf = bytearray(1024) + for op_len in range(1, 66): + print(op_len) + wr = b"\xff" * op_len + for offs in range(1, len(buf) - op_len - 1): + # Place some "sentinel" values before and after the DMA buffer + before = offs & 0xFF + after = (~offs) & 0xFF + buf[offs - 1] = before + buf[offs + op_len] = after + v = memoryview(buf)[offs : offs + op_len] + self.spi.write_readinto(wr, v) + ok = ( + all(b == 0x00 for b in v) + and buf[offs - 1] == before + and buf[offs + op_len] == after + ) + if not ok: + print(v.hex()) + print(hex(op_len), hex(offs), hex(buf[offs - 1]), hex(buf[offs + op_len])) + self.assertTrue(ok) + -spi = SPI(SPI_NUM, baudrate=5_000_000) -buf = bytearray(1024) -ok = True - -for offs in range(0, len(buf)): - v = memoryview(buf)[offs : offs + 128] - spi.readinto(v, 0xFF) - if not all(b == 0x00 for b in v): - print(offs, v.hex()) - ok = False - -print("Variable offset fixed length " + ("OK" if ok else "FAIL")) - -# this takes around 30s to run, so skipped if already failing -if ok: - for op_len in range(1, 66): - wr = b"\xFF" * op_len - for offs in range(1, len(buf) - op_len - 1): - # Place some "sentinel" values before and after the DMA buffer - before = offs & 0xFF - after = (~offs) & 0xFF - buf[offs - 1] = before - buf[offs + op_len] = after - v = memoryview(buf)[offs : offs + op_len] - spi.write_readinto(wr, v) - if ( - not all(b == 0x00 for b in v) - or buf[offs - 1] != before - or buf[offs + op_len] != after - ): - print(v.hex()) - print(hex(op_len), hex(offs), hex(buf[offs - 1]), hex(buf[offs + op_len])) - ok = False - - print("Variable offset and lengths " + ("OK" if ok else "FAIL")) +if __name__ == "__main__": + unittest.main() diff --git a/tests/ports/stm32_hardware/dma_alignment.py.exp b/tests/ports/stm32_hardware/dma_alignment.py.exp deleted file mode 100644 index e890e0081..000000000 --- a/tests/ports/stm32_hardware/dma_alignment.py.exp +++ /dev/null @@ -1,2 +0,0 @@ -Variable offset fixed length OK -Variable offset and lengths OK |