Rainbow Electronics ATmega3290P_V - Manual (Page 227)

227
ATmega329/3290/649/6490
2552H–AVR–11/06
Note: 1. See “About Code Examples” on page 8.
Assembly Code Example (1)
LCD_Init:
; Use 32 kHz crystal oscillator
; 1/3 Bias and 1/3 duty, SEG21:SEG24 is used as port pins
ldi r16, (1<
sts LCDCRB, r16
; Using 16 as prescaler selection and 7 as LCD Clock Divide
; gives a frame rate of 49 Hz
ldi r16, (1<
sts LCDFRR, r16
; Set segment drive time to 125 µs and output voltage to 3.3 V
ldi r16, (1<
sts LCDCCR, r16
; Enable LCD, default waveform and no interrupt enabled
ldi r16, (1<
sts LCDCRA, r16
ret
C Code Example (1)
Void LCD_Init(void);
{
/* Use 32 kHz crystal oscillator */
/* 1/3 Bias and 1/3 duty, SEG21:SEG24 is used as port pins */
LCDCRB = (1<
/* Using 16 as prescaler selection and 7 as LCD Clock Divide */
/* gives a frame rate of 49 Hz */
LCDFRR = (1<
/* Set segment drive time to 125 µs and output voltage to 3.3 V*/
LCDCCR = (1<
/* Enable LCD, default waveform and no interrupt enabled */
LCDCRA = (1<
}