dds.h

AD9850 DDS chip driver

/*
 *	Header file for OH2NLT DDS Synthesizer board
 *	This file defines only board specific signals
 *	Other definitions from Microchip 1687x.h file
 *
 * 	Juha Niinikoski 28.03.2004
 *
 *	SW3 added 19.04.2004
 */

#define	PIC_CLK 16000000

/*	Port A used for analog inputs	*/

#define PORTA_INIT	0b00000000

#ifdef __A_TYPE	
#define	TRISA_INIT	0b11111111	/* Porta = A/D inputs & digital inputs */
#else
#define	TRISA_INIT	0b11111011	/* Porta = A/D inputs, RA2 = BL control */
#endif

#define	ADCON0_INIT	0b11000001	/* RC osc, CH0 selected */

#ifdef __A_TYPE
#define	ADCON1_INIT	0b10000100	/* right justified 3 AD ch, int. ref */
#else
#define	ADCON1_INIT	0b10000101	/* right justified 2 AD ch, ext. ref, RA2 = BL */
#endif

#define BL		RA2		/* back light control in 877 non A version */
#define SW3		RA5		/* Push button switches */

/*	Port B signals	*/

#define PORTB_INIT	0b00000000	/* PORTB init data */
#define TRISB_INIT	0b01000111

#define P_EDGE		RB0		/* Pulse wheel edge / IRQ input */
#define P_P1		RB1		/* Pulse wheel phase 1 */
#define P_P2		RB2		/* Pulse wheel phase 2 */
#define PW_PORT 	PORTB		/* pulse wheel bit port */
#define PW_MASK (3<<1)

#define DDS_SER		RB5		/* AD9850 DDS D7/SER */

#define LOOP_TEST	RB3		// test

#define TX		RB6		/* TX signal input. 0 = TX */

#define SIDEBAND	RB7		/* Sideband select 0 = LSB, 1 = USB */
#define LSB 0
#define USB 1


/*	Port C signals	*/

#define PORTC_INIT	0b00000000	/* PORTC init data */
#define TRISC_INIT	0b10000000

#define LCD_E		RC3		/* LCD E signal */
#define LCD_RW		RC4		/* LCD R/W signal */
#define LCD_RS		RC5		/* LCD RS signal */

#define DDS_RESET	RC2		/* AD9850 DDS Reset */
#define DDS_FQ_UD	RC1		/* AD9850 DDS FQ_UD */
#define DDS_W_CLK	RC0		/* AD9850 DDS W_CLK */

/*	Port D signals	*/

/* Port D = LCD interface */

#define PORTD_INIT	0b00000000	/* PORTD init data */
#define TRISD_INIT	0b00000000

#define LCD_DATA	PORTD		/* LCD 8-bit data bus */
#define LCD_TRIS	TRISD		/* LCD data direction */ 

/*	Port E signals	*/

/* Port E used for analog inputs */

#define PORTE_INIT	0b00000000	/* PORTE init data */
#define TRISE_INIT	0b00000011	/* !TRISE controls also PORTD mode */

#define SW1		RE1		/* Push button switches */
#define SW2		RE0


/* Voltage reference module (DAC) init */

#ifdef __A_TYPE				/* if 877A with ref module */
#define CVRCON_INIT	0xC0		/* CVref ON, CVref on AN2 pin */
#endif