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MichaelB.
Joined: 04 May 2017
Posts: 58
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 Posted: Wed Mar 13, 2019 4:20 pm Post subject: KS108 128x64 do not Initialize |
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I have the Following problem.
| Code: | $regfile = "m128def.DAT"'128L 8Mhz version
$crystal = 7372800
$baud = 19200
$eepleave
$loadersize = 512
$hwstack = 100
$swstack = 75
$framesize = 40
$lib "glcdKS108.lib" 'Include the library for the KS-108 controler
Config Porte.4 = Output
Config Graphlcd = 128 * 64sed , Dataport = Porta , Controlport = Portc , Ce = 0 , Ce2 = 1 , Cd = 2 , Rd = 3 , Reset = 5 , Enable = 4
'The dataport is the portname that is connected to the data lines of the LCD
'The controlport is the portname which pins are used to control the lcd
'CE =CS1 Chip select
'CE2=CS2 Chip select second chip
'CD=Data/instruction
'RD=Read
'RESET = reset
'ENABLE= Chip Enable
Config Adc = Single , Prescaler = Auto , Reference = Internal 'Setting up the a/d convertor
Config Timer1 = Timer , Prescal |
......ect....
this is a code sample from the mcs Website to drive a 128x64 KS108 Display with Touchsreen.
Nothing happend. I Soldered a LED for Indication if the MCU is Running or if a Timing issue is there.
But the MCU isnt starting. The LED is still off.
So i make a new Code:
| Code: | $regfile = "m128def.DAT" '128L 8Mhz version
$crystal = 7372800
$baud = 19200
$eepleave
$loadersize = 512
$hwstack = 100
$swstack = 75
$framesize = 40
$lib "glcdKS108.lib" 'Include the library for the KS-108 controler
Config Porte.4 = Output
Config Graphlcd = 128 * 64sed , Dataport = Porta , Controlport = Portc , Ce = 0 , Ce2 = 1 , Cd = 2 , Rd = 3 , Reset = 5 , Enable = 4
'The dataport is the portname that is connected to the data lines of the LCD
'The controlport is the portname which pins are used to control the lcd
'CE =CS1 Chip select
'CE2=CS2 Chip select second chip
'CD=Data/instruction
'RD=Read
'RESET = reset
'ENABLE= Chip Enable
Do
Wait 1
Porte.4 = 1
Wait 1
Porte.4 = 0
Loop
End |
It still isnt running, till i Comment out the
| Code: | 'Config Graphlcd = 128 * 64sed , Dataport = Porta , Controlport = Portc , Ce = 0 , Ce2 = 1 , Cd = 2 , Rd = 3 , Reset = 5 , Enable = 4 |
Now the LED is Blinking without Config Graphlcd.
What is wrong with the Config??
I allready set Fuses:
-ext. Crystal to use a 7,372800 Mhz
-Jtag off
-M103 off
Does anyone have a Clue?
(BASCOM-AVR version : 2.0.8.1 ) |
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EDC
Joined: 26 Mar 2014
Posts: 971
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| Posted: Wed Mar 13, 2019 6:26 pm Post subject: |
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Check wirings once again.
Routines for lcd uses some Status_checking. Status is indicated on the DB7 bit of Dataport.
Routine can wait till this bit is low so..maybe some short to VCC or bad connection. |
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MichaelB.
Joined: 04 May 2017
Posts: 58
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| Posted: Wed Mar 13, 2019 6:54 pm Post subject: |
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| EDC wrote: | Check wirings once again.
Routines for lcd uses some Status_checking. Status is indicated on the DB7 bit of Dataport.
Routine can wait till this bit is low so..maybe some short to VCC or bad connection. |
there is no short. When the MCU is Running the DB7 Pin is High Level. |
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Evert :-)
Joined: 18 Feb 2005
Posts: 2156
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| Posted: Wed Mar 13, 2019 7:54 pm Post subject: |
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If you use port A as data port you need to connect AVCC(pin 64) to vcc.
Recheck you wiring again and again.
Share a link to the datasheet of your display.
_________________
www.evertdekker.com Bascom code vault |
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MichaelB.
Joined: 04 May 2017
Posts: 58
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| Posted: Wed Mar 13, 2019 8:40 pm Post subject: |
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Evert  wrote: | If you use port A as data port you need to connect AVCC(pin 64) to vcc.
Recheck you wiring again and again.
Share a link to the datasheet of your display. |
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MichaelB.
Joined: 04 May 2017
Posts: 58
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| Posted: Wed Mar 13, 2019 8:56 pm Post subject: |
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| If i Set the Overall Voltage from my Bench Powersupply to 2,56V, the white Stripe is moving from the Left side to the Right side, and repeat it. The only thing i have ever seen moving on this screen ^^ |
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Plons
Joined: 24 May 2005
Posts: 435
Location: Hilversum - The Netherlands
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| Posted: Wed Mar 13, 2019 10:06 pm Post subject: |
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Michael, you haven't connected pin5, Vo. The voltage on that pin defines the LCD operating voltage. See page 10 of your datasheet.
Nard
_________________
Bascom AVR ver 2.0.8.6
Dragon-lair: http://www.aplomb.nl/TechStuff/Dragon/Dragon.html
"leef met vlag en wimpel, maar hou het simpel" |
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MichaelB.
Joined: 04 May 2017
Posts: 58
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| Posted: Wed Mar 13, 2019 10:28 pm Post subject: |
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| Plons wrote: | Michael, you haven't connected pin5, Vo. The voltage on that pin defines the LCD operating voltage. See page 10 of your datasheet.
Nard |
Yes you are right, all the suspect unconnected Pins like VCC , K, A, V0 , Vee ect. are Fixed externally.
I bet it is the wrong Lib for that Display controller. The Datasheet of the LCD shows something like an NT7108, but i can not find it in my Bascom Lib Folder. 
I have to see it, before i desolder all to replace a new Mega128L8  |
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kimmi
Joined: 24 Feb 2006
Posts: 1922
Location: Denmark
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| Posted: Wed Mar 13, 2019 11:12 pm Post subject: |
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Check that ALL VCC & GND are connected
see images
_________________
/ Kim |
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JC
Joined: 15 Dec 2007
Posts: 586
Location: Cleveland, OH
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| Posted: Sun Mar 17, 2019 7:23 pm Post subject: |
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Agree, ALL Vcc, AVcc, and Ground pins need to be connected.
Additionally, the display might require some time for its own boot-up, before the micro sends it initialization code.
It would be appropriate to put:
Waitms 500
or even
Waitms 1000
at the start of the program, before you send the initialization sequence to the display.
Alternatively, you can configure the micro's I/O pins, and then insert the wait before sending the initialization code.
Hi Nard, Haven't seen you around in a while.
Hope all is going well for you.
JC |
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MichaelB.
Joined: 04 May 2017
Posts: 58
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| Posted: Thu Mar 21, 2019 12:22 pm Post subject: |
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| JC wrote: | Agree, ALL Vcc, AVcc, and Ground pins need to be connected.
Additionally, the display might require some time for its own boot-up, before the micro sends it initialization code.
It would be appropriate to put:
Waitms 500
or even
Waitms 1000
at the start of the program, before you send the initialization sequence to the display.
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Thx for the info:
Now just the White Stripe is gone. Stll have a Bluescreen.
I found out that is the wrong Libary for this LCD. I need a Libary for a NT7108C Chipset. But i cant find anywhere a Bascom Libary for that Chipset. |
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kimmi
Joined: 24 Feb 2006
Posts: 1922
Location: Denmark
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| Posted: Sat Mar 23, 2019 10:51 pm Post subject: |
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NT7108C are similar with Samsung KS0108B
search forum for KS0108 lots of sample code that worked
| Code: | $include "Font8x8.font"
$lib "glcdKS108.lbx"
'for Glcd Ks108
'First we define that we use a graphic LCD
Config Graphlcd = 128 * 64sed , Dataport = Porta , Controlport = Portc , Ce = 0 , Ce2 = 1 , Cd = 2 , Rd = 3 , Reset = 5 , Enable = 4 , Mode = 6
'The dataport is the portname that is connected to the data lines of the LCD
'The controlport is the portname which pins are used to control the lcd
'CE = CS1 Chip select
'CE2 = CS2 Chip select second chip
'CD = DI Data/instruction
'RD = R/W Read/Write
'RESET = RST reset
'ENABLE = E Chip Enable
'And Potmeter for contrast to +5V, V0, VEE (V0 is center pin on pot)
Setfont Font8x8
Dim Char As Byte , L As Byte , C As Byte
'Show lcd ascii on lcd
Do
Cls
Char = 31
For L = 1 To 8
For C = 0 To 127 Step 8
Char = Char + 1
Lcdat L , C , Chr(char)
Next C
Next L
Wait 2
Cls
Char = 128
For L = 1 To 8
For C = 0 To 127 Step 8
Char = Char + 1
Lcdat L , C , Chr(char)
Next C
Next L
Wait 2
Loop
End |
_________________
/ Kim |
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MichaelB.
Joined: 04 May 2017
Posts: 58
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| Posted: Sun Apr 07, 2019 2:08 pm Post subject: |
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Found the Problem, it was a Damaged Display.  (  |
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