NIOS II SPI HAL driver open code

examples application code:

/*************************************************************************

* Copyright ? 2004 Altera Corporation, San Jose, California, USA. *

* All rights reserved. All use of this software and documentation is *

* subject to the License Agreement located at the end of this file below.*

**************************************************************************

* Description: *

* The following is a simple hello world program running MicroC/OS-II.The *

* purpose of the design is to be a very simple application that just *

* demonstrates MicroC/OS-II running on NIOS II.The design doesn't account*

* for issues such as checking system call return codes. etc. *

* *

* Requirements: *

* -Supported Example Hardware Platforms *

* Standard *

* Full Featured *

* Low Cost *

* -Supported Development Boards *

* Nios II Development Board, Stratix II Edition *

* Nios Development Board, Stratix Professional Edition *

* Nios Development Board, Stratix Edition *

* Nios Development Board, Cyclone Edition *

* -System Library Settings *

* RTOS Type - MicroC/OS-II *

* Periodic System Timer *

* -Know Issues *

* If this design is run on the ISS, terminal output will take several*

* minutes per iteration. *

**************************************************************************/

# include <stdio.h># include <io.h># include <sys/types.h># include <sys/stat.h># include <fcntl.h># include <unistd.h># include "includes.h"# include "altera_avalon_spi_regs.h" /*&#36825;&#20004;&#20010;&#22836;&#25991;&#20214;&#24517;&#19981;&#21487;&#23569;*/# include "altera_avalon_spi.h"

/* Definition of Task Stacks */# define TASK_STACKSIZE 2048

OS_STK task1_stk[TASK_STACKSIZE];

OS_STK task2_stk[TASK_STACKSIZE];

OS_STK task3_stk[TASK_STACKSIZE];

/* Definition of Task Priorities */

# define TASK1_PRIORITY 1# define TASK2_PRIORITY 2# define TASK3_PRIORITY 3# define BUFLEN 256

int master_fd;

/* Prints "Hello World" and sleeps for three seconds */

void task1(void* pdata)

{

alt_u8 sendbuf[BUFLEN];

alt_u16 writelen,i;

for(i=0;i<BUFLEN;i++)

sendbuf = i;

alt_u16 value=0;

ioctl(master_fd,spi_master_ioctl_select_slave,&value);

// return;

while (1)

{

writelen = write(master_fd,sendbuf,sizeof(sendbuf));

// printf("write %d\n",writelen);

ostimedlyhmsm(0, 0, 0, 50);

}

}

void task3(void* pdata)

{

alt_u8 recvbuf[buflen];

alt_u16 readlen,i,wi;

wi = 0;

while (1)

{

readlen = read(master_fd,recvbuf,sizeof(recvbuf));

for(i=0;i<readlen;i++){

printf("%2.2x ",recvbuf);

wi = (wi+1)%16;

if(wi==0)

printf("\n");

}

}

}

void task2(void* pdata)

{

alt_u8 recvbuf[BUFLEN];

alt_u16 readlen,i,wi;

printf("Hello from task2\n");

int fd;

if ((fd=open(SPI_SLAVE_NAME, O_RDWR, 0)) < 0)

{

perror("open spi");

return;

}

printf("fd=%d\n",fd);

wi=0;

while (1)

{

readlen = read(fd,recvbuf,sizeof(recvbuf));

write(fd,recvbuf,readlen);# if 0

for(i=0;i<readlen;i++){

printf("%2.2x ",recvbuf[i]);

wi = (wi+1)%16;

if(wi==0)

printf("\n");

}# endif

}

close(fd);

}

/* The main function creates two task and starts multi-tasking */

int main(void)

{

if ((master_fd=open(SPI_MASTER_NAME, O_RDWR, 0)) < 0)

{

perror("open spi");

return;

}

OSTaskCreateExt(task1,

NULL,

(void *)&task1_stk[TASK_STACKSIZE],

TASK1_PRIORITY,

TASK1_PRIORITY,

task1_stk,

TASK_STACKSIZE,

NULL,

0);

OSTaskCreateExt(task3,

NULL,

(void *)&task3_stk[TASK_STACKSIZE],

TASK3_PRIORITY,

TASK3_PRIORITY,

task3_stk,

TASK_STACKSIZE,

NULL,

0);

OSTaskCreateExt(task2,

NULL,

(void *)&task2_stk[TASK_STACKSIZE],

TASK2_PRIORITY,

TASK2_PRIORITY,

task2_stk,

TASK_STACKSIZE,

NULL,

0);

OSStart();

return 0;

}