Using MACRO

Altera_Forum · ‎03-30-2005

I'd like to program NIOS II like plc language "Structured Text " and

in my future i want to create system based on fpga and NIOS II that

allows me to write accessing memory and pheriperal like this

For example , i want to access to my image input and memory :

IF (I2.0==true) and (M5.5==true)

{

OUT10.5=true;

}

It's possible , writing macro and structure or onion , to obtain like i want ?

Obvios i must to include header file (.h)

Thanks for information

Walter

Altera_Forum · ‎03-31-2005

/*

* "Hello plc" example.

* This example works on cyclone dev board

*/

# include <stdio.h># include "system.h"# include "altera_avalon_pio_regs.h"

# define BYTE alt_u8# define WORD alt_u16# define DWORD alt_u32

# define BIT0 0x01# define BIT1 0x02# define BIT2 0x04# define BIT3 0x08# define BIT4 0x10# define BIT5 0x20# define BIT6 0x40# define BIT7 0x80

# define BIT8 0x0100# define BIT9 0x0200# define BIT10 0x0400# define BIT11 0x0800# define BIT12 0x1000# define BIT13 0x2000# define BIT14 0x4000# define BIT15 0x8000

# define PIO_WR(BASE,DATA) IOWR_ALTERA_AVALON_PIO_DATA((BASE),(DATA))# define PIO_RD(BASE) (IORD_ALTERA_AVALON_PIO_DATA((BASE)))

typedef union {

struct {

BYTE b0:1; // bit0

BYTE b1:1; // bit1

BYTE b2:1; // bit2

BYTE b3:1; // bit3

BYTE b4:1; // bit4

BYTE b5:1; // bit5

BYTE b6:1; // bit6

BYTE b7:1; // bit7

} bit;

BYTE val;

} IO;

IO in0,in1,out0;

void read_inputs(void);

void write_outputs(void);

int main()

{

int i;

printf("Hello from Nios II!\n");

while(1) {

read_inputs(); // read all inputs

// do plc stuff

out0.bit.b4=in0.bit.b0 ;

out0.bit.b5=in0.bit.b1 ;

out0.bit.b7=in0.bit.b0 & in0.bit.b1;

write_outputs(); // write all outputs

}

return 0;

}

void read_inputs(void) {

// negate that 1 means key pressed

in0.val=~PIO_RD(BUTTON_PIO_BASE);

}

void write_outputs(void) {

PIO_WR(LED_PIO_BASE,out0.val);

}

Altera_Forum · ‎03-31-2005

thanks for the interesting

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/wink.gif

ciao

walter