David and et al,
     Well if I did this correctly I have now managed to setup the USB=20
clock for high speed operation and the PIC is running at 4 MHz. It was=20
running at 1 MHz. And the LCD still initializes correctly.
Thanks,
rich!

On 10/22/2015 8:47 PM, David Duffy (AVD) wrote:
> Shouldn't those defines be:
>
> #define LCD_rs  LATAbits.RA0     //Pin 2 LCD pin 4
> #define LCD_rw LATAbits.RA1     //Pin 3 LCD pin 5
> #define LCD_e LATAbits.RA2     //Pin 4 LCD pin 6
>
> David...
>
> On 23/10/2015 11:32 AM, Richard R. Pope wrote:
>> David,
>>        Sure. Here is the cmd and the data routines:
>>                                extern void LCD_Send_cmd(unsigned char va=
lue)
>>                                    {
>>                                            LCD_data =3D value;
>>                                            LCD_rs =3D 0;
>>                                            LCD_rw =3D 0;
>>                                            LCD_e =3D 1;
>>                                            wait_ms(30);
>>                                            LCD_e =3D 0;
>>                                    }
>>
>>                               extern void LCD_Send_data(unsigned char va=
lue)
>>                                    {
>>                                            LCD_data =3D value;
>>                                            LCD_rs =3D 1;
>>                                            LCD_rw =3D 0;
>>                                            LCD_e =3D 1;
>>                                            wait_ms(30);
>>                                            LCD_e =3D 0;
>>                                    }
>>        You call them for sending either cmds or data to the LCD. The
>> initialize routine uses the cmd routine. Feel free to ask whatever
>> questions you think are necessary. I appreciate the help!
>> Thanks,
>> rich!
>>
>> On 10/22/2015 8:18 PM, David Duffy (AVD) wrote:
>>> Can you give me a few lines of how you're using them in the code?
>>>
>>> On 23/10/2015 11:01 AM, Richard R. Pope wrote:
>>>> David,
>>>>          Here are the pins used.
>>>>                  #define LCD_rs                   RA0     //Pin 2 LCD =
pin 4
>>>>                  #define LCD_rw                  RA1     //Pin 3 LCD p=
in 5
>>>>                  #define LCD_e                    RA2     //Pin 4 LCD =
pin 6
>>>>                  #define LCD_data     LATAD    19-22 and pins 27-30
>>>>          Notice that LATAD works with the LCD_data definition! I don't=
 get it.
>>>> Thanks,
>>>> rich!
>>>>
>>>> On 10/22/2015 7:45 PM, David Duffy (AVD) wrote:
>>>>> Ah.... I hadn't been playing along.  :)
>>>>>
>>>>> So, what actual port pin is RS on ?
>>>>> David...
>>>>>
>>>>> On 23/10/2015 10:08 AM, Richard R. Pope wrote:
>>>>>> David,
>>>>>>            Let's try this again. I decided to use a 18f4550 instead =
of the
>>>>>> 16f877a. Sorry about that. The PIC and LCD initialize but I can't ge=
t
>>>>>> the LCD to accept and display any data such as a or b or hello there=
 and
>>>>>> so forth. I have been discussing the 4550 all along and you were und=
er
>>>>>> the impression that I was using a 877. My fault.
>>>>>>
>


--=20
Richard R. Pope
President
Reedsburg Area Model Railroad Club, RAMRC
1230 19th Street #5
Reedsburg, WI 53959
608-768-7448
mechanic_2@charter.net

--=20
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