DS89C430 - cannot connect to loader

vinodstanur · Oct 11, 2011

I have downloaded the required softwares from **broken link removed**
Then I opened the serial port successfully.. (USB to SERIAL converter, that is 100% working)
After that when I try to connect to loader, I am getting error...
I grounded the EA and PSEN and provided 5V to RST...
But, I am sure it is communicating with the serial port but still showing error as below:

Then I simply tried to connect by giving 0v at RST (I know it will not work, but just to know the response I did this)
Then the result is as below:

So, I think it is getting some required response in the first case but I couldn't understand why it couldn't connect to loader...

vinodstanur · Oct 12, 2011

I didn't connected the DTR and I manually grounded EA , PSEN and provided 5V to RST..
while pressing reset and trying to connect to loader, I am getting the same result :

Code:

<0D><0A>
<0D>!


!Ô…C <05>DQ*<015>R9 &)<02> <0A>
II<014><05>BCJ0 T1LP*<015>MR<011>U(J<0A>
<02>ÊCÓ‚ êDQ*²Rªê9 &) ¨
•IIŠBCJ’0’ T1LP*šMR¨ÊU(ÕJÕ
R<0D><0A>
R<0D>!J0<02>O(2<019> P1<014><01A>-C0L:PL'P&2<019> 5F<014>2<0D>N<015>J<012><0D>!<02>Unable to establish communication with target.
Check connection to target system or consult help files.

From the data sheet of DS89C430, I came to know about the flash memory lock bits ..
from the data sheet:

Once a security level is selected and programmed, the setting of the lock bits remains. Only a mass erase can
erase these bits and allow reprogramming the security level to a less restricted protection.

Now I doubt the bits are locked or some thing like that might happened...Because it is already programmed MCU and I got it from a JUNK ...(but from a working hardware )

Any suggestions?

bigdogguru · Oct 12, 2011

It looks like the autobaud feature is not able to detect the proper BAUD rate. What is the crystal frequency?

BigDog

IanP · Oct 12, 2011

Try this:
https://www.edaboard.com/threads/39068/

:wink:
IanP

vinodstanur · Oct 12, 2011

It is 11.0592 MHz...

bigdogguru · Oct 12, 2011

The autobaud feature only supports a few baud rates for each crystal frequency.

For a 11.0592 MHz crystal set your baud rate to 57,600, 28,800 or 19,200. I would try 19,200 first and if successful move up to higher rates.

BigDog

vinodstanur · Oct 12, 2011

IanP said:
Try this:
https://www.edaboard.com/threads/39068/

:wink:
IanP

Sir, this is a copy of your post in the thread:

<0D><0A>
<0D><0A>
DS

DS89C450 LOADER VERSION 2.1 COPYRIGHT (C) 2002 DALLAS SEMICONDUCTOR<0D><0A>
> 89C450 LOADER VERSION 2.1 COPYRIGHT (C) 2002 DALLAS SEMICONDUCTOR
> R<0D><0A>
R<0D><0A>
LB:07 OCR:00 ACON:1F CKCON:01 P0:FF P1:FF P2:FF P3:FF FCNTL:B1<0D><0A>
>Watchdog reset function is enabled in device, cannot be disabled
Unable to establish communication with target.
Check connection to target system or consult help files.
K
<0D><0A>

<0D><0A>
>
> <0D><0A>
<0D><0A>
<0D><0A>

> > R<0D><0A>
R<0D><0A>
LB:00 OCR:F7 ACON:1F CKCON:01 P0:FF P1:FF P2:FF P3:FF FCNTL:B1<0D><0A>
>W CKCON 7<0D><0A>
W CKCON 7<0D><0A>
<0D><0A>
> W ACON 00<0D><0A>
W ACON 00<0D><0A>
<0D><0A>
> W LB 7<0D><0A>
W LB 7<0D><0A>
<0D><0A>
>

But couldn't understand that...

when I click on "connect to loader" it is showing

<0D><0A>
<0D>H>

¡H>þR<0D><0A>
R<0D>!J0<02>O(2<019> P1<014><01A>-C0LL'P&2<019> 5F<014>2<0D>N<015>J<012><0D>!<02>Unable to establish communication with target.
Check connection to target system or consult help files.

So , can I use command "K" even if it shows "Unable to establish communication with target.
" while trying to connect to loader?
but any way,
what are all things displayed is not readable ...
:x

bigdogguru · Oct 12, 2011

Have you changed the port setting to one of the BAUD rates I listed previously, 57,600, 28,800 or 19,200?

According to your screenshots in your first posting, you are running the port at 9600 BAUD which is incompatible with your crystal frequency and the autobaud feature of the bootloader.

BigDog

vinodstanur · Oct 12, 2011

bigdogguru said:
The autobaud feature only supports a few baud rates for each crystal frequency.

For a 11.0592 MHz crystal set your baud rate to 57,600, 28,800 or 19,200. I would try 19,200 first and if successful move up to higher rates.

BigDog

Yes Sir, I tried those baud rates... But still showing same result while clicking "connect to loader".

bigdogguru · Oct 12, 2011

Are you power cycling the device before attempting to connect with MTK?

BigDog

vinodstanur · Oct 12, 2011

Yes I tried those bauds:
the result for 28800 is:

<0D><0A>
<0D>*

¡”*aTPTH>aTPªTH>þR<0D><0A>
R<0D>!J0<02>O(2<019> P1<014><01A>-C0LL'P&2<019> 5F<014>2<0D>N<015>J<012><0D>!<02>Unable to establish communication with target.
Check connection to target system or consult help files.

But when I tried a higher baud ie 115200, it is showing a different result:

<0D><0A>
x

€€xR<0D><0A>
xDid not receive R prompt
Unable to establish communication with target.
Check connection to target system or consult help files.

---------- Post added at 16:52 ---------- Previous post was at 16:49 ----------

bigdogguru said:
Are you power cycling the device before attempting to connect with MTK?

BigDog

no, am not doing that.

bigdogguru · Oct 12, 2011

Try using a terminal emulation program instead of the MTK application. Set the terminal emulator to one of the BAUD rates I have provided and then power cycle the MCU and then hit the carriage return.

It appears there is something wrong with your serial connection.

BigDog

---------- Post added at 16:58 ---------- Previous post was at 16:55 ----------

You need to POWER CYCLE the device with RST, EA and PSEN tied to the appropriate levels before attempting to use the MTK or terminal emulator.

BigDog

Easyrider83 · Oct 12, 2011

vinodstanur said:
(USB to SERIAL converter, that is 100% working)

Check DTS, DSR, RTC and other signals. Usually, they are not present on this converters.
And try to use normal com port. All that signals have a very large response with port emulation. For example, FT232 have a 1ms response time for this signals.

vinodstanur · Oct 12, 2011

can I use the terminal in tinipic bootoader?
also, what you mean by

then hit the carriage return.

?:shock:

---------- Post added at 17:04 ---------- Previous post was at 17:01 ----------

Easyrider83 said:
Check DTS, DSR, RTC and other signals. Usually, they are not present on this converters.
And try to use normal com port. All that signals have a very large response with port emulation. For example, FT232 have a 1ms response time for this signals.

But I am not using those DTS, DSR and RTC..I am using only the Tx and Rx and that is working because I am using that to program pic via a bootloader.

Easyrider83 · Oct 12, 2011

vinodstanur said:
But I am not using those DTS, DSR and RTC..I am using only the Tx and Rx and that is working because I am using that to program pic via a bootloader.

I see.
On your place, I could use an oscilloscope with memory or logic analyzer to see what exactly frequency your mcu using to answer. Or just try another crystal.

vinodstanur · Oct 12, 2011

bigdogguru said:
You need to POWER CYCLE the device with RST, EA and PSEN tied to the appropriate levels before attempting to use the MTK or terminal emulator.

BigDog

At present, what I did is, I soldered the EA and PSEN to ground.
Then there is a reset button in the board. So I press the reset button while attempting to connect to loader.

So, you mean I should turn off the entire MCU power supply and then turn it on again and then test it ?
or
Should I connect the PSEN and EA to +Vcc at first when the MCU is powered and then need to ground it ?
Because at present I don't have extra hardware to do it automatically with DTR of the serial converter...

vinodstanur · Oct 12, 2011

bigdogguru said:
Try using a terminal emulation program instead of the MTK application. Set the terminal emulator to one of the BAUD rates I have provided and then power cycle the MCU and then hit the carriage return.

It appears there is something wrong with your serial connection.

BigDog

Thanksssssss for this valuable reply:smile:
Now is working with the terminal in the TINY PIC BOOTLOADER software!!!!!!!

:-D

See the screenshoot:

bigdogguru · Oct 12, 2011

It has been a while since I programmed a DS89C, however if I remember correctly you need to leave RST pulled high throughout the programming process, not just momentarily high. Tie the RST pin to Vcc and power cycle the device then attempt to connect using MTK or a terminal emulator.

The ROM loader mode is invoked by simultaneously applying a logic 1 to the RST pin, a logic 0 to the EA pin, and driving the PSEN
pin to a logic 0 level. If power were to cycle while the required input stimuli were present, the loader would be invoked on power-up.
When the ROM loader mode is invoked, the device awaits an incoming <CR> character (0Dh) on serial port 0 at a baud rate that can
be detected by the autobaud routine. The autobaud routine is described later in this section. The autobaud routine receives and transmits
data only on serial port 0, ignoring activity on serial port 1. Upon successful baud-rate detection, the ROM loader transmits a banner
similar to the one shown below, signaling to the host that loader mode has successfully been invoked. The banner is followed by
a “>” prompt, which indicates the device is ready to receive a command.

The 11.0592 MHz crystal is fine and is one of the preferred values. By "carriage return," I was referring to the Return/Enter key, I guess I showing my age.

BigDog

---------- Post added at 17:34 ---------- Previous post was at 17:25 ----------

I'm glad you got the bootloader to function properly.

Here are a few appnotes pertaining to the bootloader:

**broken link removed**

Now all you have to do is erase the entire device and you should be good to go.

BigDog

tlh3 · Apr 30, 2012

vinodstanur said:
Thanksssssss for this valuable reply:smile:
Now is working with the terminal in the TINY PIC BOOTLOADER software!!!!!!!

:-D

See the screenshoot:
View attachment 62568

May I know after you connect to the loader, how to do load in your HEX file? Do you need to choose the Device you use?
Please help. I face the same problem.

DS89C430 - cannot connect to loader

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