Hello,manuel.stahl, I read the message from Johannes Reif on the internet. His email is as follows: "I'm using the sc16is7x2 driver (SPI<-> 2x UART) written by Manuel Stahl. While operating one UART channel everything seems fine. But if I use both channels the driver runs into an "unresponsive state" after some time. In this state I figured out that the /IRQ pin of the chip stays low (active) although the IIR of both channels indicates that there is no interrupt pending." because there is not request_threaded_irq( ) function in 2.6.27 kernel version. So i use your old version sc16is7x2.c. It does not use the thread-irq, but with work queue. But i get the same results with Johannes Reif . My test app program is described as follows: In the application creates two threads, each operates a sc16is752 serial port. In every thread, first send 100 bytes,followed by waitting to receive about 200byte. The test result is that the spi driver reports the error :ttySC0: 64 input overrun(s) or ttySC1: 1 input overrun(s) ,and app received part of the data. Sometimes IRQ is held low. Can you give some advice about this question? I continue to follow this issue. Thanks! kathy chang 2010-12-22 ------------------------------------------------ tel：+086 21 62545050-7910 fax：62578046 email：[email protected] ------------------------------------------------ ------------------------------------------------------------------------------ Forrester recently released a report on the Return on Investment (ROI) of Google Apps. They found a 300% ROI, 38%-56% cost savings, and break-even within 7 months. Over 3 million businesses have gone Google with Google Apps: an online email calendar, and document program that's accessible from your browser. Read the Forrester report: http://p.sf.net/sfu/googleapps-sfnew _______________________________________________ spi-devel-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/spi-devel-general
