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1  Using Arduino / Displays / Re: Help me connecting a GLCD to arduino on: September 04, 2013, 02:19:23 pm
Hello , Thank you very much for your reply i got the LCD working
like this :


1- LED A
2- LED K -Common GND
3- MS - VDD
4- CS
5- V0
6- RS
7- RW
8- RD(E)
9>16 - DB0>DB7

i used an ATX PSU for a negative -12V

only one thing i want to adjust the resolution to fit to my display 240x40
i am using this from the UG8lib
Code:
//U8GLIB_LC7981_240X64 u8g(8, 9, 10, 11, 4, 5, 6, 7,  18, 14, 15, 17, 16); // 8Bit Com: D0..D7: 8,9,10,11,4,5,6,7 en=18, cs=14 ,di=15,rw=17, reset = 16

but this is a 240x64 , what files in the lib that needs to be changed to adjust the display height

Thank you again for the help smiley
2  Using Arduino / Displays / Help me connecting a GLCD to arduino on: September 03, 2013, 12:24:35 pm
Hello i am trying to connect an LCD i have found with arduino
it is driven by a LC7980 240x40 and ATMEL AT27c010 CMOS
and a LM324m
i traced the pinouts for it and here it is

1- LED A
2- LED K
3- MS - CONNECTED TO A RESISTOR TO RESET PIN ON THE LC7980
4- CS
5- connected to LM324M GND
6- RS
7- RW
8- RD(E)
9- DB0
10- DB1
11- DB2
12- DB3
13- DB4
14- DB5
15- DB6
16- DB7
17- connected to A13 pin on the atmel cmos
18- connected to A14 pin on the atmel cmos
19- connected to A15 pin on the atmel cmos
20- connected to A16 pin on the atmel cmos 

i also found out the the MS pin on the LC7980 is connected to LM324m V+

datasheet for LC7980
http://pdf1.alldatasheet.com/datasheet-pdf/view/41029/SANYO/LC7980.html

i also found this library https://code.google.com/p/u8glib/
already have support for LC7981 which i think is very similar to what i have

if anyone could help me figure out how to connect it i will be grateful 


3  Using Arduino / Project Guidance / Re: Aruino UNO Rev3 Bricked ? (ATMEGA16U2) on: January 26, 2013, 12:23:35 am
// The bootloader of Atmega328P is still working so currently I use a Serial-USB converter to upload the code via UART interface, bad thing is it requires manual reset during the upload progress.

i used another Arduino as a programmer using the ArduinoISP example connected the pins on the ICSP near the Atmega16u2 chip then i used Winavr to flash the chip with this command
Code:
avrdude -p m16u2 -F -P COM12 -c avrisp -U flash:w:Arduino-usbserial-atmega16u2-Uno-Rev3.hex -U lfuse:w:0xFF:m -U hfuse:w:0xD9:m -U efuse:w:0xF4:m -U lock:w:0x0F:m -b 19200

erased the chip then wrote the new firmware and returned successful
but still no luck i am wondering what else might cause the problem
i also tried swaping the atmega328p with no luck i am really pulling my hair here not sure what else i could try
4  Using Arduino / Project Guidance / Re: Aruino UNO Rev3 Bricked ? (ATMEGA16U2) on: January 24, 2013, 11:16:37 pm
You will notice the 6 pin header near the Atmega16U2, just connect an AVR programmer to those pins then re-flash the chip.
With this I can make sure either the chip is dead or it has corrupt firmware. In worse case, use it to program the Atmega328p directly.
// I think i'll have that programmer in my mailbox later today.

i have a similar problem when i connect the card there is no hardware detected but i used the ICSP header for the atmega16u2 and it accepted the firmware which means the chip is not dead but still when i try to connect it to PC there is no hardware i tried several PCs and i tried a working and test USB cable but still no luck ? what else might be the reason for this ???
5  Using Arduino / Installation & Troubleshooting / Re: UNO rev3 no hardware detected on: January 24, 2013, 07:04:22 am
i have another arduino Uno i uploaded arduinoISP sketch connected atmega16u2 ICSP header to the programmer used WinAvr and i write the firmware using this command
Code:
avrdude -p m16u2 -F -P COM12 -c avrisp -U flash:w:Arduino-usbserial-atmega16u2-Uno-Rev3.hex -U lfuse:w:0xFF:m -U hfuse:w:0xD9:m -U efuse:w:0xF4:m -U lock:w:0x0F:m -b 19200
and everything went smooth the new firmware was written , now i tried to connect the uno again but nothing happens no hardware detected
obviously the atmega16u2 chip is not fried there is still hope ....
if anyone could help me i suspect one of the components needs to be replaced a capacitor a transistor etc ....
any tips or advice will be much appreciated
thank you all
6  Using Arduino / Installation & Troubleshooting / Re: UNO Drivers won't install on: January 24, 2013, 01:29:16 am
Restart your computer and while boot up keep pressing the "F8" key "Advanced boot options" will open choose "Disable Driver Signature Enforcement"
after windows open go to "Device manager" click on update driver for the Unknown device and choose Arduino's drivers folder and see if it works this time
7  Using Arduino / Installation & Troubleshooting / UNO rev3 no hardware detected on: January 23, 2013, 11:55:40 pm
Hello , i have a problem when i connect the uno to the computer there is no new hardware recognized
earlier i accidentlly shorted the ground and 5v pin but i know there is a fuse that disconnects the card until the shortage/load is cleared
and this is what happend as i heard the windows usb disconnect then reconnect sound
later this i tried uploading a sketch but i found no com port i tried disconnecting reconnecting but nothing happens no hardware found
i tried on another computer but the same ? the atmega16u2 is fried ? or there is still hope , any suggestions solutions please share ?
Thanks
8  Using Arduino / Displays / need help connecting an LCD on: August 03, 2012, 09:33:25 am
hello everyone

i have salvaged an LCD from a cord phone
i don't know if it compatible with arduino or not but pin names been written on the board and it is like this :

LED
SP
VSS
PN
DO
DATE
RDI
DP
HKS
BAT
RING
SPI
DI
HDO
VDD
DTMF
LO
LOCK
LA
C6
C5
C4
C3
C2


my question is is it possible to connect it and if so then which pins should i use ?
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