From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Phil Endecott" Date: Sun, 03 Jun 2007 18:08:09 +0000 Subject: Re: [lm-sensors] Jetway J7F2 with f71805: PWM not working Message-Id: <1180894089842@dmwebmail.belize.chezphil.org> List-Id: References: <1180813726137@dmwebmail.belize.chezphil.org> In-Reply-To: <1180813726137@dmwebmail.belize.chezphil.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lm-sensors@vger.kernel.org Jean Delvare wrote: > On Sat, 02 Jun 2007 20:48:46 +0100, Phil Endecott wrote: >> So, has anyone else had any experience with this board? Has PWM been >> known to work with other boards with this chip? Is it common for fan >> connectors to not have PWM control? > > I have a Jetway K8M8MS motherboard with a Fintek F71805F chip, where > pwm1 controls fan1. So I am reasonably certain that fan speed control is > properly implemented by my f71805f driver. However, you are not the > first one to report about being enable to control the fans using this > driver. It seems to be common that motherboard manufacturers don't > bother wiring things properly :( Thanks Jean. I have scoped the three outputs and they all seem to be outputting the expected PWM waveforms. Curiously, the PWM1 pin has a track that goes somewhere; it's not a fan (unless I have screwed up) so what could it be? I'm a bit concerned that it is used for something else that I'm going to break... Anyway I have constructed a driver circuit based on the example from the datasheet and will be trying it out soon. The most difficult part was attaching a wire to the pin; despite a reasonably fine soldering iron and a magnifying glass I still managed to bridge it to its neighbours. I have glued the wire down to the board as strain-relief for my soldering, and will try it out once the glue is dry. Regards, Phil. _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors