CheckSum problems

[user]

Posted on February 03, 2004 at 10:43

CheckSum problems

[user]

Posted on February 02, 2004 at 05:42

Hi to all,

I have a problem with STVD7 when I try to implement

ChechSum Routine (AN1070). I'm using ST7 Lite19 .

Now, when the program try to loop and sum

all location (flash Memory 4k from F0000h to FFFFh),

when try to read location FFE0h give me a error ''Non existant memory at address 0xffeo''.

Somebody know how I can resolve the issue ?

Many Tanks

MBKS

[shreya]

Posted on February 03, 2004 at 10:16

That is because FFE0-FFE1 is an unused vector location and hence, in MCU configuration window, these locations are NEM-> Non-existent memory. This problem will not be faced on the device.

[luca239955_st]

Posted on February 03, 2004 at 10:43

not exactly an answer to your question, but you might want to know that if you use C, there are library functions to verify the checksum (by segment or for the whole application).

Regards,

Luca