SPI EEPROM

[Emanuel Lourenco]

Hello

I'm trying to use an EEPROM 25AA1024.
I got an example here in the forum.

http://www.matrixtsl.com/mmforums/viewt ... t=25aa1024

But I am not able to get to work. The value of EEPROM shot is always 255.
I ask for help to solve this problem.
I leave my connections to my dsPIC and the program.

[mikn]

This is what I've got when opened your project. Are you sure you have all pins correctly linked?

ww.GIF (19.69 KiB) Viewed 5041 times

Try to use CAL_SPI instead of SPI_Master component. I've got many troubles with all "high-level" components and use only low-level CAL_SPI/ADC/I2C now.

[Benj]

Hello,

I've got many troubles with all "high-level" components

This is news to me, what are you having difficulties with?

Here is a version of your program with the connections setup to match your drawing.

25AA1024_v6-1.fcfx

(10.36 KiB) Downloaded 322 times

[mikn]

This is news to me, what are you having difficulties with?

For example, I couldn't initialize 24lc512 with I2CMaster, but same was done with CAL_I2C. Same bytes sent, same addresses used. Don't know what's the reason.
Also I've got total application freeze on ADCBase GetAverageByte macro. I've wrote about this http://www.matrixtsl.com/mmforums/viewt ... yte#p60399, but the issue was not resolved, so I had to use C code to work with ADC directly.
I've got some other problems with different components but don't report them all since I used C code to replace failed macro or component and had to move forward with projects as they are time dependent, and you reply too long.

[Emanuel Lourenco]

Hi
Was experiencing the file and did not work.
I have to put a resistance ... or something?
The rest of the EEPROM pin is necessary to connect?
Best Regards

[Emanuel Lourenco]

hi

After exploring the best forum I found this post.
Joint now made a program in this post.

http://www.matrixtsl.com/mmforums/viewt ... nes#p27054

I leave attached the program

I've been to analyze the signals of the SPI.
And chegei the conclusion that I do not get signal from my EEPROM.
Let down the signs I got.
However transmit a signal to EEPROM 0101010101 instead of receiving the EEPROM signal.
What could it be?
Chip damaged?

I hope I have explained well and that can help me.

Best Regards
Emanuel