[ECOS] how does the ctrlc happen when the serial port interrupt(ARM). Thanks

[Jonathan Larmour]

Qiang Huang wrote:
> Hi all:
>    As far as I know ctrlc is normally support in the by first calling the
> "hal_default_isr()" function, but when the "cyg_drv_interrupt_attach()" in
> the serial device driver will overwrite the "hal_interrupt_handlers" in
> vectors.S. so when install the interrupt handler by
> "cyg_drv_interrupt_attach()" for the serial port "hal_default_isr()" will be
> replaced by the ISR installed, how and where will be the place to examine
> the "0x03" for ctrlc support? Thanks a lot.

It isn't. If you install the serial driver it overrides the ctrl-c
support, and that's just the way it has to be. If you want to do something
with ctrl-c, you should do it yourself when you read stuff from the serial
port.

> Is the following calling path correct? Thanks
> (ARM target)
> 
> IRQ happens -->
> (1). if the interrupt in the hal_interrupt_handlers table entry not get
> replaced by calling cyg_xxx_attach() then default as:
> hal_default_isr() --> hal_ctrlc_isr( ) --> cyg_hal_plf_serial_isr( ) -->
> cyg_hal_user_break( )  this will look for the ctrlc.

The details sometimes vary by platform, but that looks about right.

Jifl
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