8-bit MicrocontrollersのトピックRe: HC908GP32 Monitor Mode

HC908GP32 Monitor Mode

xena — Sat, 03 Mar 2007 01:05:33 GMT

Hi.

I' tring to program a GP32 MCU with the software called P&E ICS08GPGTZ.

The programmer that ia used is the one from the original datasheet.

When i try to enter in Monitor Mode with tis mcu,the software tels me that,on the STATUS Section, at the 4th Status Indicator that the mcu did not enter the monitor mode.First 4 Status indicators are ok("Y") .The rest are blank.

What solutions can you offer me?

Tnx.

Re: HC908GP32 Monitor Mode

peg — Sat, 03 Mar 2007 07:41:53 GMT

Hi xena,

The first test that is failing is "Device Entered Monitor Mode", is this correct?

Does it fail here every time?

This is a strange point to fail at!

You have clicked the help button beside the status and read that?

Have you tried another target device?

Re: HC908GP32 Monitor Mode

xena — Sat, 03 Mar 2007 07:46:24 GMT

Yes,this is the first test that is falling:"DEvice Enterde Monitor Mode:N"

It fail avery time.

I read ALL that it is said on HELP

I have tried 4 MCU's and the result was the same every time.

Do you have others opinions why isn't working?

Tnx

Re: HC908GP32 Monitor Mode

peg — Sat, 03 Mar 2007 08:06:16 GMT

Hi xena,

The reason I double checked this with you is that in the thoasands of times I have done this I don't remember ever seeing it stall here.

The target has already indicated to the host that it is in monitor mode and this is really just a double check by reading out the monitor version.

The hardware of your adapter has been checked as two way communication has already occured.

So the only things I can think of is:

Reset voltage not low enough.

Clock very slightly off frequency. What are you using?

Are all the parts you have tested programmed or blank. Try a blank one if you can.

Really poking in the dark here...

Re: HC908GP32 Monitor Mode

xena — Sat, 03 Mar 2007 08:10:39 GMT

I'm using a 16MHz oscilator with a custom baud-rate of 15625 from PC.

I tried 1 programmed mcu and 3 blanks.The result is te same in all 4 cases.

Re: HC908GP32 Monitor Mode

peg — Sat, 03 Mar 2007 08:24:59 GMT

Hi,

Have you tried everthing the same but 9.8304MHz and 9600 baud?

Is your clock duty cycle good?

Re: HC908GP32 Monitor Mode

xena — Sat, 03 Mar 2007 08:30:08 GMT

The duty cycle is 50%.I measured the voltage between OSC1 and OSC2 with a voltage meter and the values diplayed was 2.5 V.

I havent' tried a 9.804MHz oscilator. This might be the problem?

Re: HC908GP32 Monitor Mode

peg — Sat, 03 Mar 2007 08:40:22 GMT

It _might_ be.

Most people, including me, run it at 9.8Meg. I definately works here.

I have no experience and have never heard of anyone running the monitor at this speed.

Failing comment from anybody that has done this, it is what I would try first.

Re: HC908GP32 Monitor Mode

xena — Sat, 03 Mar 2007 19:52:00 GMT

Ok,tnx for your answers.

If anybody else had this problem and foun a solution,please tell me.

TNX

Re: HC908GP32 Monitor Mode

xena — Sun, 04 Mar 2007 04:57:34 GMT

It seems that the 16MHz osccilator requires a speciefied baud-rate that cannot be "emulated" properly by the software.Using a 20MHz osscilator,the specified baud-rate it is more appropiate of a real hardware suported baud-rate.

So,using a 20Mhz for example, all works fine.