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Emulation: the UARTs receive by interrupt - #125
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dmuart receives by DMA now, which Renode's STM32F7 USART cannot serve (no request line to the DMA): the console shows its prompt but reads nothing, so the UART step of the Renode tests fails. In emulation mode the downloaded dmuart configurations get rx_dma=0 (dmuart's key for receiving by interrupt); the hardware keeps the DMA. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Summary
The Renode tests fail since dmuart receives by DMA (dmuart#8): the console prints its prompt but reads nothing (
echo prints its argument: no prompt after ..., the rest of the steps skipped). Renode's STM32F7 USART has no DMA request line, so a UART receiving by DMA gets no data in the emulator.In emulation mode the downloaded dmuart configurations get
rx_dma=0(scripts/emulation_uart_config.cmake, run after the modules are downloaded), which makes the UART receive by interrupt. The hardware build is not changed.Needs choco-technologies/dmuart#9 (the
rx_dmakey) released; until then the key is ignored.Testing
I could not run the Renode tests locally (the monitor-gdb step times out on my machine), so the cause is read from the CI log and not confirmed in Renode. The script was run on the real
usart1.ini:rx_dma=0lands in the section once, and a second run changes nothing.🤖 Generated with Claude Code