jit_singh_tara
Joined: 22 Dec 2006
Posts: 110
Helped: 6
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 01 Aug 2009 6:02 pic16f886 |
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well friends ,
i am stuck up in a issue regarding nokia 1100 lcd.....
I am running a program to display something on nokia 1100 lcd ,
1. The program is running fine on pic16f876a , but it fails to run on pic 16f886(low power mcu). The code is unchanged.
Is it that low power mcu interface signals are not strong enough to drive lcd...
Whats the solution......?
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doraemon
Joined: 21 Jun 2009
Posts: 145
Helped: 18
Location: Japan
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01 Aug 2009 7:19 nokia 1100 lcd |
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Hello!
Are you sure that it does indeed fail?
If you use a lower voltage, then there is a possibility that
the contrast is not adapted. Therefore it might be a matter
of contrast setting.
Second, you run it on a different PIC. Did you verify that the signals
come to the right place? I would put a scope on the following pins:
- SDA
- SCL
(By the way, I am not sure anymore, but I think this LCD's input is I2C).
In case it's SPI, then check CS, MOSI and RESET pins.
Try the working one, and then try the not working one. See if there is a
difference in the signals. If you see no signal on the above lines, it means
that your source code has to be adapted to the new chip.
If there are signals and they look the same, then look at the contrast setting.
By the way, check with the datasheets of the LCD and microcontroller that
their power supplies are compatible.
Dora.
| jit_singh_tara wrote: |
well friends ,
i am stuck up in a issue regarding nokia 1100 lcd.....
I am running a program to display something on nokia 1100 lcd ,
1. The program is running fine on pic16f876a , but it fails to run on pic 16f886(low power mcu). The code is unchanged.
Is it that low power mcu interface signals are not strong enough to drive lcd...
Whats the solution......? |
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