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Discussion Groups | 68HC12 | syncronization between SBC and HC12
Join our technical discussions about Freescale Microcontrollers: M68HC12. (Freescale Semiconductor is a Subsidiary of Motorola).
syncronization between SBC and HC12 - xree...@yahoo.com - Mar 23 1:29:07 2009
hello.
I have a single board computer (TS-5500) running linux. The SBC request data from my hc12 by sending a specific character through serial port. When Hc12 receives this character, it will send a series of characters through the serial port. The problem I am facing is that sometimes the hc12 will miss this request data command from hc12 and therefore will not send data. Any idea why is this happening. Note that the serial of hc12 is interrupt based,and the hc12 board is receiving around 4 more interrupts from different sensors.
I appreciate your help
Thank you ,
MAS
------------------------------------
______________________________
Stellaris® MCU Family: New Parts, New Package, New Price.
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
I have a single board computer (TS-5500) running linux. The SBC request data from my hc12 by sending a specific character through serial port. When Hc12 receives this character, it will send a series of characters through the serial port. The problem I am facing is that sometimes the hc12 will miss this request data command from hc12 and therefore will not send data. Any idea why is this happening. Note that the serial of hc12 is interrupt based,and the hc12 board is receiving around 4 more interrupts from different sensors.
I appreciate your help
Thank you ,
MAS
------------------------------------
______________________________
Stellaris® MCU Family: New Parts, New Package, New Price.
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: syncronization between SBC and HC12 - =?ISO-8859-1?Q?Ruben_J=F6nsson?= - Mar 23 3:08:16 2009
> hello.
> I have a single board computer (TS-5500) running linux. The SBC request data
> from my hc12 by sending a specific character through serial port. When Hc12
> receives this character, it will send a series of characters through the serial
> port. The problem I am facing is that sometimes the hc12 will miss this request
> data command from hc12 and therefore will not send data. Any idea why is this
> happening. Note that the serial of hc12 is interrupt based,and the hc12 board is
> receiving around 4 more interrupts from different sensors.
>
> I appreciate your help
>
> Thank you ,
> MAS
Could it be the SCI mask bug present in some chips?
In some occations the SCI can miss to generate an interrrupt on incomming
characters.
I think this has been all fixed now but you might have an old chip.
/Ruben
==============================
Ruben Jönsson
AB Liros Electronic
Box 9124, 200 39 Malmö, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
r...@pp.sbbs.se
==============================
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
> I have a single board computer (TS-5500) running linux. The SBC request data
> from my hc12 by sending a specific character through serial port. When Hc12
> receives this character, it will send a series of characters through the serial
> port. The problem I am facing is that sometimes the hc12 will miss this request
> data command from hc12 and therefore will not send data. Any idea why is this
> happening. Note that the serial of hc12 is interrupt based,and the hc12 board is
> receiving around 4 more interrupts from different sensors.
>
> I appreciate your help
>
> Thank you ,
> MAS
Could it be the SCI mask bug present in some chips?
In some occations the SCI can miss to generate an interrrupt on incomming
characters.
I think this has been all fixed now but you might have an old chip.
/Ruben
==============================
Ruben Jönsson
AB Liros Electronic
Box 9124, 200 39 Malmö, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
r...@pp.sbbs.se
==============================
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )