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Altera_Forum
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12 years ago

uclinux PIO device driver interrupt handler not execute

Hi, Thanks in advance for any help I can get. I have a NIOS2 w/MMU running uClinux v3.7. It's a DE2-115 development kit with Cyclone IV FPGA. I use the PIO megafunction to monitor input rising ...
Altera_Forum's avatar
Altera_Forum
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12 years ago

Hi Kazu,

I have experience missing receive bytes using UART RS232 port on uClinux running NIOS2 /f. I implemented a loopback application to send 128 bytes hex data from ttyA0 (RS232 port) and receive on ttyA5 (RS232 port). This is a DE2-115 development kit. The IRQ for both port is 1 and 2. I have a JTAG for nios2-terminal, but it's irq is 3. I have disabled the flow control (ctsrts, xon/xoff,etc), but each loopback test I do, I always missing 10 to 11 bytes. However, if I send less than 10 bytes of data, I have higher chance of success getting the same bytes across. I have heard I need a FIFO MEGAIP for the design but there no current uClinux driver support it. If you know of this problem and have a solution to it, please kindly let me know what I am missing?

Thanks,

Yeung