Hi, I just build a qsys system as shown below
where I just wana write and read data to a simple 8 bit register which I wrote and instantiated in qsys as usererg8bit. Here is the verilog HDL code for that
module userreg8bit(
input write,
input [7:0] writedata,
input read,
output [7:0] readdata,
input clk,
input reset
);
reg [7:0] Regreaddata;
assign readdata=Regreaddata;
always @ (posedge clk)
begin
if(reset)
begin
Regreaddata<=0;
end
else if(write)
begin
if(read)
begin
Regreaddata<=writedata;
end
end
end
endmodule
Now I wrote a C application for HPS as .
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "C:\altera\15.1\embedded\ip\altera\hps\altera_hps\hwlib\include\hwlib.h"
#include "C:\altera\15.1\embedded\ip\altera\hps\altera_hps\hwlib\include\soc_cv_av\socal\socal.h"
#include "C:\altera\15.1\embedded\ip\altera\hps\altera_hps\hwlib\include\soc_cv_av\socal\hps.h"
/*#include "C:\altera\15.1\embedded\ip\altera\hps\altera_hps\hwlib\include\soc_cv_av\socal\alt_gpio.h"*/
#include "D:\masterarbeit3\HPSFPGAFIFO\hps_0.h"
#define REG_BASE 0xFF200000 /*LWFPGA SLAVE Address*/
#define REG_SPAN 0x00200000 /*LWFPGA SLAVE SPAN*/
volatile unsigned char *reg_addr; /*this is the pointer that writes to the register. This is our write input*/
void* virtual_base; /*pointer to open device memory file*/
int main ()
{
int fd = EXIT_FAILURE;
int value; /*this is input value to the register*/
unsigned char regvalue;
printf("Please enter a number from 1 to 15: ");
scanf("%d",&value);
printf("you entered the value :%d",value);
fd=open("/dev/mem",(O_RDWR|O_SYNC));
if (fd < 0) {
perror("open");
exit(EXIT_FAILURE);
}
virtual_base=mmap(NULL,REG_SPAN,(PROT_READ|PROT_WRITE),MAP_SHARED,fd,REG_BASE);
reg_addr = (unsigned char *) (virtual_base+USERREG8BIT_0_BASE);
/*writing the value*/
*reg_addr=value;
/*reading the value back*/
regvalue=*reg_addr;
printf("%c\n",regvalue);
return 0;
}Here is my make file
#
TARGET = HPSFPGAFIFO
#
CROSS_COMPILE = arm-linux-gnueabihf-
ALT_DEVICE_FAMILY ?= soc_cv_av
CFLAGS := -g $(OFLAG) -Wall -Werror -std=c99 $(MULTILIBFLAGS) -I$(HWLIBS_ROOT)/include -I$(HWLIBS_ROOT)/include -D$(ALT_DEVICE_FAMILY)
ALL_HWLIBS_SRC = $(wildcard $(HWLIBS_ROOT)/src/hwmgr/*.c) $(wildcard $(HWLIBS_ROOT)/src/hwmgr/$(ALT_DEVICE_FAMILY)/*.c $(wildcard $(HWLIBS_ROOT)/src/utils/*.c))
LDFLAGS = -g -Wall
CC = $(CROSS_COMPILE)gcc
ARCH= arm
build: $(TARGET)
$(TARGET): HPSFPGAFIFO.o
$(CC) $(LDFLAGS) $^ -o $@
%.o : %.c
$(CC) $(CFLAGS) -c $< -o $@
.PHONY: clean
clean:
rm -f $(TARGET) *.a *.o *~My c code compiled successfully now when I run my C application on Cyclone V arrow sockit board, it takes data input from user but after that doesn't show me the output. Any ideas where am I wrong?
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