LCD Port D 16F1939

[Jan Lichtenbelt]

I use just a test flowcode (LCD start, clear and string "TEST") to test the LCD on the EB006-30 board on port D. I use the 40 pins 16F1939 microcontroller. But the LCD does not show the text. Is there a reason that I cannot use the prot D?

kind regards

Jan Lichtenbelt

[Enamul]

Hi,
I think you that this particular PIC has built-in capacitive sensor which has analog input CPS8-15 mapped in PORTD...which has to be disabled for normal digital I/O operation.

I use just a test flowcode (LCD start, clear and string "TEST") to test the LCD on the EB006-30 board on port D. I use the 40 pins 16F1939 microcontroller. But the LCD does not show the text.

To do this add the following C code in the beginning of the program...

Code: Select all

anseld=0x00;
cpscon0=0x00;

Hope this will help.
Enamul

[Benj]

Hi Jan,

Please can you confirm that this works to solve the problem and I will add the lines of code to the init section of the FCD file so this problem is automatically fixed in future revisions.

[Jan Lichtenbelt]

Hi Ben,

This extention of 2 lines C-code let work the LCD correctly on the D-Port of the 16F1939.

Kind regards

Jan Lichtenbelt

[Enamul]

Hi,
I was thinking it should work but as I don't have the IC with me..
I feel I should keep quite until your answer...Thanks Jan for the reply..
Enamul