BS2E...Read/Write problem

Archiver

Hello everyone,

I've been trying to get both the BS2-IC and the BS2E-IC
to accept Read/Write commands within my program,
but when I turn the power off/on I find out the EEprom
didn't seem to accept the write command. I have tryed
the sample programs in the basic stamp manual ver 1.9 .
but can't seem to make them work. If anyone has some
answers or maybe examples of some source code to do
this command, I would greatly appreciate it! Do I need to
enter other directives in the beginning of the program to
enable the read/write commands to eeprom(Stamps)....
Thanks!!!
jim

Archiver

Jim,

I am using a bs-2 for an air conditioner load controller.
The eeprom stores thermostat setting, duty cycle, etc.
that are essential for an orderly program startup after a
power interruption.

Here's some code:

set1 var word
set2 var byte

At the program start reserve 16 bytes of eeprom storage

settings data ($10)

Read/write in body of program

read 0, set1.lowbyte
read 1, set1.highbyte
read 2, set2
.
.

write 0, set1.lowbyte
write 1, set1.highbyte
write 2, set2
.
.

Note that the read/write transfers only one byte at a time.
To transfer a word, two read/write instructions are necessary.

Hope this helps,
Adolph Stumpf



--- In basicstamps@egroups.com, opburg89@a... wrote:
> Hello everyone,
>
> I've been trying to get both the BS2-IC and the BS2E-IC
> to accept Read/Write commands within my program,
> but when I turn the power off/on I find out the EEprom
> didn't seem to accept the write command. I have tryed
> the sample programs in the basic stamp manual ver 1.9 .
> but can't seem to make them work. If anyone has some
> answers or maybe examples of some source code to do
> this command, I would greatly appreciate it! Do I need to
> enter other directives in the beginning of the program to
> enable the read/write commands to eeprom(Stamps)....
> Thanks!!!
> jim

Archiver

Hi Jim,

It does work, and no other directives are necessary. Try the following
program. The value of x displayed on the debug screen should increase by 1
each time you press the reset button, or each time you remove and reapply
power.

x var byte
main:
read 0,x ' read contents of eeprom address zero
debug ? x ' show it
x=x+1 ' add one to x
write 0,x ' store it
end ' wait for reset or power-on

hope that helps,
-- Tracy



> I've been trying to get both the BS2-IC and the BS2E-IC
> to accept Read/Write commands within my program,
> but when I turn the power off/on I find out the EEprom
> didn't seem to accept the write command. I have tryed
> the sample programs in the basic stamp manual ver 1.9 .
> but can't seem to make them work. If anyone has some
> answers or maybe examples of some source code to do
> this command, I would greatly appreciate it! Do I need to
> enter other directives in the beginning of the program to
> enable the read/write commands to eeprom(Stamps)....
> Thanks!!!
> jim