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RE: Serial device driver problem.
- To: "'Jonathan Larmour'" <jlarmour at redhat dot com>
- Subject: RE: [ECOS] Serial device driver problem.
- From: "Dennis Ehlin (ECS)" <Dennis dot Ehlin at ecs dot ericsson dot se>
- Date: Wed, 30 May 2001 08:21:08 +0200
- Cc: ecos-discuss at sources dot redhat dot com
>>
>> When i do a serial_read (located serial.c) everything seems to work ok, and i get to the
>> cyg_drv_cond_wait(&cbuf->wait) line and it stops there to wait for the cbuf->wait signal. ok.
>>
>> Then i generate a serial receive interrupt and the serial_rcv_char function is called,
>> which sends the cbuf->wait signal with the line cyg_drv_cond_signal(&cbuf->wait).
>>
>> But nothing happends?, the cyg_drv_cond_wait(&cbuf->wait) never continues, as if it never gets the
>> signal.
>
>Perhaps it did get the signal but hasn't read all the bytes requested (the
>*len argument).
Sounds unlikely, It's setup to receive only 1 byte, and i have a printout just after
the cyg_drv_cond_wait(&cbuf->wait) line, and it never gets executed.