Dot Matrix With EEPROM

[dev_shr]

I have successfully made 8X16 scrolling dot matrix which can scroll only 6 capital alphabets. Then i added an EEPROM to increase the number of character. I am successful to write the characters to EEPROM but when i scroll those characters from EEPROM flickering occurs. I even checked by increasing the refresh rate (i have scanned each column in 1ms) but flickering still occurs. I have attached both of my works. You have to press Esc key after you type your alphabets in virtual terminal. Can anyone please suggest me any thing?

 

[erio]

why you don`t post the source so we can trace your bugs?
do you already try the circuit in real world?

 

[dev_shr]

Yes i tested the circuit in real world also. I am attaching my codes also, hope you could help me.

 

[FvM]

I think, reading the EEPROM in the timer interrupt isn't a good idea. You would want to read it in the main loop and transfer the data through memory locations between main and interrupt.

 

[dev_shr]

I think, reading the EEPROM in the timer interrupt isn't a good idea. You would want to read it in the main loop and transfer the data through memory locations between main and interrupt.

Yes i also think its a good idea. But do i need to have any buffer or it works with normal hardware?
can you please tell me how to transfer the read data through memory location between main and interrupt???

 

[sahu]

I have successfully made 8X16 scrolling dot matrix which can scroll only 6 capital alphabets. Then i added an EEPROM to increase the number of character. I am successful to write the characters to EEPROM but when i scroll those characters from EEPROM flickering occurs. I even checked by increasing the refresh rate (i have scanned each column in 1ms) but flickering still occurs. I have attached both of my works. You have to press Esc key after you type your alphabets in virtual terminal. Can anyone please suggest me any thing?

can u post hear sch ... ????