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2.20_trouble_reports [2009/04/29 16:24] jesper |
2.20_trouble_reports [2009/10/21 08:13] (current) jesper |
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| ===== ETRAX FS: The serial port and the USB driver uses the same DMA channels ===== | ===== ETRAX FS: The serial port and the USB driver uses the same DMA channels ===== | ||
| - | **Problem:** The USB driver uses two DMA channels, DMA 2/3 or DMA 4/5, as serial port 1 and 2. If trying to use a serial port configured to use the same DMA channels as the USB driver it will fail wit a message like this: | + | **Problem:** The USB driver uses two DMA channels, DMA 2/3 or DMA 4/5, just as serial ports 1 and 2 do. If trying to use a serial port configured to use the same DMA channels as the USB driver it will fail with a message like this: |
| <code> | <code> | ||
| Failed to request DMA 4 for ser1, already allocated by crisv32_hcd | Failed to request DMA 4 for ser1, already allocated by crisv32_hcd | ||