Lost

Thank you so much! I will review over this, I have been having a problem with understanding what the code is actually doing... Im currently working on a problem trying to get an LCD display working and checking for a busy flag after each process or what not, i was given a flow chart to go off of.

OPTREX LCD

2.2.2.2 4 - Bit Initialization:
Wait more than 100ms

Power ON
Wait more than 15ms after Vcc = 4.5V
RS R/W DB7 DB6 DB5 DB4
0 0 0 0 1 1
0 0 0 0 1 0
0 0 N F x x
0 0 0 0 0 0
0 0 1 0 0 0
0 0 0 0 0 0
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 1 I/D S
0 0 0 0 0 0
0 0 1 1 C B
Wait more than 4.1ms
Initialization Complete,
Display Ready.
RS R/W DB7 DB6 DB5 DB4
0 0 0 0 1 1
RS R/W DB7 DB6 DB5 DB4
0 0 0 0 1 1
RS R/W DB7 DB6 DB5 DB4
0 0 0 0 1 0
No data should be transferred to or from the
display during this time.
Function Set Command: (8-Bit interface)
No data should be transferred to or from the
display during this time.
No data should be transferred to or from the
display during this time.
Function Set Command: (8-Bit interface)
Function Set Command: (8-Bit interface)
After this command is written, BF can be checked.
Function Set (Interface = 4 -bit, Set N and F
for number of lines and character font)
Display OFF
Clear Display
Entry Mode Set:
Display ON (Set C and B for cursor/Blink
options.)
Note: BF should be checked before each
of the instructions starting with
Display OFF.

This is the stuff in the flow chart above... but hopefully somewhere in what you posted will get me to understand.

THank you again!
Zack

Thank you so much! I will review over this, I have been having a problem with understanding what the code is actually doing... Im currently working on a problem trying to get an LCD display working and checking for a busy flag after each process or what not, i was given a flow chart to go off of.

OPTREX LCD

2.2.2.2 4 - Bit Initialization:
Wait more than 100ms

Power ON
Wait more than 15ms after Vcc = 4.5V
RS R/W DB7 DB6 DB5 DB4
0 0 0 0 1 1
0 0 0 0 1 0
0 0 N F x x
0 0 0 0 0 0
0 0 1 0 0 0
0 0 0 0 0 0
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 1 I/D S
0 0 0 0 0 0
0 0 1 1 C B
Wait more than 4.1ms
Initialization Complete,
Display Ready.
RS R/W DB7 DB6 DB5 DB4
0 0 0 0 1 1
RS R/W DB7 DB6 DB5 DB4
0 0 0 0 1 1
RS R/W DB7 DB6 DB5 DB4
0 0 0 0 1 0
No data should be transferred to or from the
display during this time.
Function Set Command: (8-Bit interface)
No data should be transferred to or from the
display during this time.
No data should be transferred to or from the
display during this time.
Function Set Command: (8-Bit interface)
Function Set Command: (8-Bit interface)
After this command is written, BF can be checked.
Function Set (Interface = 4 -bit, Set N and F
for number of lines and character font)
Display OFF
Clear Display
Entry Mode Set:
Display ON (Set C and B for cursor/Blink
options.)
Note: BF should be checked before each
of the instructions starting with
Display OFF.

This is the stuff in the flow chart above... but hopefully somewhere in what you posted will get me to understand.

THank you again!
Zack

What kind of help do you need, exactly?

I will review over this,

NO. You should _start_ with the links given you.

I am reading all of it now... This tutorial on 8052 is alot easier to understand than any of the material i have read in books so far... There is a couple of things im kinda fuzzy on, ill keep reading and mabye it will become clear.

Just wanted to express my gratitude!

Zack