Yeah, sorry that was a typo. I am actually declaring TOO_HOT. Also
I did go through the diagram that they display for configuring the
clock, and I'm fairly certain that I have set it up correctly. I
will look it over again though. Thanks for the advice. Still
haven't got it working yet.
--- In , "Killingsworth, Steve"
<steve.killingsworth@u...> wrote:
>
> 1) You are declaring TOO_HIGH and programming TOO_HOT - typo or
could this
> be a/the problem?
>
> 2) Comment for ECLKDIV indicates value for 192Khz clock? While I
am not
> familiar with the "S"128 I use the std
DG128A. EEDIV (ECLKDIV?)
is a write
> once register and must be set in relation to the
MCU clock. This
is
> **VERY** important to prevent damage to the
EEPROM.
> -----Original Message-----
> From: Doug Brainard [mailto:doug@b...]
> Sent: Monday, June 16, 2003 5:56 PM
> To:
> Subject: [68HC12] Problems programming the EEPROM
> Hi All,
> I'm new at trying to program the EEPROM and was hoping you guys
> could shed some light on the problem I'm having. First off, I am
> using the MC9S12DG128B with a 40MHz external clock (20MHz bus).
> According to Metroworks, I have the EEPROM located at 0x2000-
0x27FF
> as declared below:
>
> Block Module Name Address Range Status
> 0 EEPROM 2000 - 27FF Blank - Selected
> 1 FLASH_4000 4000 - 7FFF Blank - Selected
> 2 FLASH_C000 C000 - FFFF Blank - Selected
> 3 PAGED 388000 -3FBFFF Blank - Selected
>
> I'm trying to do a sector erase/program word. The debugger
> initially shows TOO_HOT as being 0, and after trying to program
that
> location with my program it still displays a 0.
The following is
> the code that I'm using. Any help would be much appreciated.
> Thanks.
>
> unsigned int TOO_HIGH @0x2000; // declared the variable to view
> // beginning of the EEPROM
>
> ECLKDIV = 0x59; // set up EEPROM with 192KHz
clock
> ESTAT = 0x30; // clear misc error bits
>
> while (!(ESTAT & 0x80)); // wait until buffer is ready
> TOO_HOT = 900; // load address and data
> ECMD = 0x60; // erase sector and program word
> ESTAT = 0x80; // start programming
> while (!(ESTAT & 0x40)); // wait until all commands are done
> --------------------
>
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