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Re: Serial Testing Problems!
- To: "Chris C." <hksbtx at 2bzd dot com>
- Subject: Re: [ECOS] Serial Testing Problems!
- From: Jonathan Larmour <jlarmour at redhat dot com>
- Date: Wed, 08 Aug 2001 18:49:16 +0100
- Cc: ecos-discuss at sourceware dot cygnus dot com
- Organization: Red Hat UK Ltd.
- References: <15724200183815532862@2bsure.com>
"Chris C." wrote:
>
> Hi
>
> I have modified the serial.c in the \ecos\examples. I use it to test the
> serial read/write for the EB40. Part of the code is shown below:
>
> cyg_io_handle_t handle;
> Cyg_ErrNo err;
> const char test_string[] = "serial example is working correctly!\n";
> cyg_uint32 len = strlen(test_string);
> unsigned char buffer[16];
> int len1;
>
> printf("Starting serial example\n");
>
> err = cyg_io_lookup( "/dev/ser1", &handle );
>
> if (ENOERR == err) {
> printf("Found /dev/haldiag. Writing string....\n");
> err = cyg_io_read(handle, &buffer[0], &len1);
> err = cyg_io_write( handle, test_string, &len );
> }
>
> I used insight to debug and I found that the function "cyg_io_write" will
> call the device driver function "at91eb40_serial_putc" but the
> "cyg_io_read" had not call the "at91eb40_serial_getc". Why?
Dunno, sorry. No immediate reason I can think of. Note the function name is
at91_serial_getc though.
> Also, there are some testing programs in the io\serial but some of the
> programs need ser_filter to run. Where can I find it?
In the host tools: cvs co ecos/host
You can build the host tools with "./configure ; make"
> Does eCos have any testing programs that are used to test the serial device
> driver[read/wirte]? [the testing program will not share the serial port
> with GDB]
This is what ser_filter is designed to solve - you run ser_filter and tell
it which serial port to use. You then connect from GDB to a TCP port
provided by ser_filter.
Jifl
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