Rainbow-electronics ATmega3290P_V Instrukcja Użytkownika Pobierz pdf (Strona 229)

229

ATmega329/3290/649/6490

2552H–AVR–11/06

Note: 1. See “About Code Examples” on page 8.

Assembly Code Example

(1)

LCD_disable:

; Wait until a new frame is started.

Wait_1:

lds r16, LCDCRA

sbrs r16, LCDIF

rjmp Wait_1

; Set LCD Blanking and clear interrupt flag

; by writing a logical one to the flag.

ldi r16, (1<<LCDEN)|(1<<LCDIF)|(1<<LCDBL)

sts LCDCRA, r16

; Wait until LCD Blanking is effective.

Wait_2:

lds r16, LCDCRA

sbrs r16, LCDIF

rjmp Wait_2

; Disable LCD.

ldi r16, (0<<LCDEN)

sts LCDCRA, r16

ret

C Code Example

(1)

Void LCD_disable(void);

{

/* Wait until a new frame is started. */

while ( !(LCDCRA & (1<<LCDIF)) )

;

/* Set LCD Blanking and clear interrupt flag */

/* by writing a logical one to the flag. */

LCDCRA = (1<<LCDEN)|(1<<LCDIF)|(1<<LCDBL);

/* Wait until LCD Blanking is effective. */

while ( !(LCDCRA & (1<<LCDIF)) )

;

/* Disable LCD */

LCDCRA = (0<<LCDEN);

}

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