include/delay.h File Reference

#include "fx2types.h"

Go to the source code of this file.

Defines
#define	NOP   _asm nop _endasm
#define	SYNCDELAY2   NOP; NOP
#define	SYNCDELAY3   NOP; NOP; NOP
#define	SYNCDELAY4   NOP; NOP; NOP; NOP
Functions
void	delay (WORD millis)

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Detailed Description

Functions for causing delays.

Definition in file delay.h.

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Define Documentation

#define NOP   _asm nop _endasm

See TRM 15-14,15-15 some registers (r/w) require syncdelay after

up to the programmer to determine which sync is needed. for standard 48mhz clock w/ 48mhz IFCONFIG 3 nops is sufficient.

slower clock and faster ifclock require more delay

min delay = roof ( 1.5 x (ifclock/clkout + 1) )

Minimum IFCLOCK is 5mhz but you have to use an external clock source to go below 30mhz

IFCLKSRC 1 = internal, 0=external 3048mhz 0 = 30mhz, 1 = 48mzh

Figure your own sync delay out if IFCLKSRC=0.

Definition at line 52 of file delay.h.

#define SYNCDELAY2   NOP; NOP

SYNCDELAY2 can work for the following clock speeds

ifclk/clk

• 48/12

ceil(1.5 * (20.8 / 83.3 + 1)) = 2

See also:

NOP

Definition at line 65 of file delay.h.

#define SYNCDELAY3   NOP; NOP; NOP

SYNCDELAY3 can work for the following clock speeds

ifcfg/clk

• 48/24
• 48/48
• 30/12
• 30/24

See also:

NOP

Definition at line 78 of file delay.h.

#define SYNCDELAY4   NOP; NOP; NOP; NOP

SYNCDELAY4 should be used for the following speeds

ifcfg/clk

• 30/48

See also:

NOP

Definition at line 88 of file delay.h.

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Function Documentation

void delay

(

WORD

millis

)

0-65536 millis