[En-Nut-Discussion] Locked Ethernut board

[Kevin Rock]

> From: Kevin Rock <kevinrock at earthlink.net>
> Sent: Oct 10, 2008 3:30 PM
> To: Ethernut <en-nut-discussion-request at egnite.de>
> Subject: Locked Ethernut Rev 1.3 H
>  
> I have somehow locked my board.  I have been wiring it for various interfaces and reprogramming it with the SPI-Duo 2 for over a year with no problems.  Last night I rewired it for an LCD interface and wanted to flash my code to see if it would work.  However, I got this error: 
> Getting isp parameter.. SD=0x98
> ISP frequency must be 5 kHz or above when programming EEPROM or FLASH!
>  
> I have the Ethernut board Rev 1.3H and use AVR Studio 4.13.571 sp2 to assemble my code.  Once it has assembled I click on the AVR button to get to my SPI-Duo 2.  There is always a popup window which asks me to downgrade but I hit cancel to get to the programmer.  Then I click button Input HEX file in the Flash area and enter the path to my hex file.
>  
> Upon further inspection I find the following:
> Under the Main tab - Programming Mode and Target Settings I find the ISP frequency is locked at 1.005 kHz.  When I click the settings button I get to some other choices.  I choose one and click write.  The number changes but later I find it has reset to 1.005 kHz all by itself.  
>  
> Under the Fuses tab - I have JTAGEN checked and SPIEN is checked too but it has a red question mark in the box along with the check mark.  I would assume this is bad.  There is no way for my to uncheck this box.  
>  
> I would like to be able to program the Flash again.  What should I do?  What does the red check mark mean?
>  
> Kevin.