Hello!
I am trying use a 16F628A with an LCD 2x16 hd44780 module.
(The contrast of LCD and backlite are ok ;) )
The 16F628A has not xtal. I use the internal oscilator.
My code start with
include 16f628a -- Micro a usar
pragma target OSC INTOSC_NOCLKOUT -- Oscilador interno
pragma target clock 4_000_000 -- Frecuencia del oscilador
pragma target WDT disabled -- WDT off
pragma target LVP disabled -- no low voltage programming
pragma target MCLR internal --
and continues with the i/o definitions:
enable_digital_io() -- Todos los pines como I/O digitales
const byte LCD_ROWS = 2 -- LCD de dos lineas
const byte LCD_CHARS = 16 -- y 16 caracteres por linea
var bit lcd_en is pin_A1 -- Pin E del LCD
var bit lcd_rs is pin_A0 -- Pin RS del LCD
var byte lcd_dataport is portB_high -- 4 data pins
pin_A0_direction = output
pin_A1_direction = output
portB_high_direction = output
Obviusly, the LCD module are conected like the source code.
Then, the code is:
include lcd_hd44780_4 -- Incluyo la libreria del LCD
lcd_init() -- e inicializo el controlador del LCD
include delay -- Incluyo la libreria de las demoras
delay_1ms(500)
lcd_clear_screen()
lcd_write_char ("A")
delay_1ms(500)
etc,etc,etc...
The "A" char never is shown. The LCD only show one line of squares, the same
if the 16F628A will not exist.
The HEX file run fine in the simulator (PIC SIMULATOR IDE). But in the real
prototype the PIC micro appears not run. :(
i have some experience with PICs and BASIC / CCS, and i builded tens of
circuits without problems. But in this case, the mad micro dont run! :)
¿Some idea? ¿What can test?
Cheers!
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