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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <error.h>
#include <errno.h>
#include "NE10.h"
/* customize these macros and variables for a particular implementation */
#define FFT_POINTS (256)
#define IN_SAMPLE_TYPE ne10_fft_cpx_int16_t
#define OUT_SAMPLE_TYPE ne10_fft_cpx_int32_t
const char *g_test = "fftdma_256";
const char *g_description = "256 point FFT, FPGA, 16-bit input 24/32-bit output";
/* these functions and variables are implemented in overhead.c as a library */
extern void initialize_everything(int argc, char **argv);
extern uint64_t get_gt_value(void);
extern void release_everything(void);
extern void print_results(void);
extern char *g_input_filename;
extern char *g_output_filename;
extern uint64_t g_start_time;
extern uint64_t g_end_time;
int main(int argc, char **argv)
{
int input_fd;
int output_fd;
int fftdma_dev_fd;
int result;
IN_SAMPLE_TYPE *in_buf;
OUT_SAMPLE_TYPE *out_buf;
initialize_everything(argc, argv);
/* allocate storage for input, output and config buffers */
in_buf = (IN_SAMPLE_TYPE*) NE10_MALLOC (FFT_POINTS * sizeof(IN_SAMPLE_TYPE));
if(in_buf == NULL)
error(1, errno, "in_buf allocation");
out_buf = (OUT_SAMPLE_TYPE*) NE10_MALLOC (FFT_POINTS * sizeof(OUT_SAMPLE_TYPE));
if(out_buf == NULL)
error(1, errno, "out_buf allocation");
/* open the input and output files and fft dev */
input_fd = open(g_input_filename, O_RDONLY);
if(input_fd < 0)
error(1, errno, "opening input file '%s'", g_input_filename);
output_fd = open(g_output_filename, O_WRONLY | O_CREAT, ~((mode_t)umask));
if(output_fd < 0)
error(1, errno, "opening output file '%s'", g_output_filename);
fftdma_dev_fd = open("/dev/fftdma", O_RDWR);
if(fftdma_dev_fd < 0)
error(1, errno, "opening fftdma_dev_fd");
/* capture the start value of the GT */
g_start_time = get_gt_value();
/* read the input data */
result = read(input_fd, in_buf, FFT_POINTS * sizeof(IN_SAMPLE_TYPE));
if(result < 0)
error(1, errno, "read input file");
if(result != (FFT_POINTS * sizeof(IN_SAMPLE_TYPE)))
error(1, 0, "input data size, expected %d but got %d", FFT_POINTS * sizeof(IN_SAMPLE_TYPE), result);
/* perform FFT with FPGA hardware, 16 bit input 24/32 bit output */
result = write(fftdma_dev_fd, in_buf, FFT_POINTS * sizeof(IN_SAMPLE_TYPE));
if(result < 0)
error(1, errno, "write to fftdma_dev_fd");
if (result != (int)(FFT_POINTS * sizeof(IN_SAMPLE_TYPE)))
error(1, 0, "fftdma_dev_fd input data size, expected %d but got %d", FFT_POINTS * sizeof(IN_SAMPLE_TYPE), result);
result = read(fftdma_dev_fd, out_buf, FFT_POINTS * sizeof(OUT_SAMPLE_TYPE));
if(result < 0)
error(1, errno, "read from fftdma_dev_fd");
if (result != (int)(FFT_POINTS * sizeof(OUT_SAMPLE_TYPE)))
error(1, 0, "fftdma_dev_fd output data size, expected %d but got %d", FFT_POINTS * sizeof(OUT_SAMPLE_TYPE), result);
/* write the output data */
result = write(output_fd, out_buf, FFT_POINTS * sizeof(OUT_SAMPLE_TYPE));
if(result < 0)
error(1, errno, "write output file");
if(result != (FFT_POINTS * sizeof(OUT_SAMPLE_TYPE)))
error(1, 0, "output data size, expected %d but got %d", FFT_POINTS * sizeof(OUT_SAMPLE_TYPE), result);
/* capture the end value of the GT */
g_end_time = get_gt_value();
/* close the input and output files and fft dev */
close(fftdma_dev_fd);
close(output_fd);
close(input_fd);
/* free storage for input, output and config buffers */
NE10_FREE (out_buf);
NE10_FREE (in_buf);
print_results();
release_everything();
return 0;
}
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