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/* -*- c++ -*- */
/*
* Copyright 2003,2004,2008,2009 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <iostream>
#include <sstream>
#include <fstream>
#include <string>
#include <cstdlib>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <linux/spi/spidev.h>
/*
* Configuration connections
*
* CCK - MCSPI1_CLK
* DIN - MCSPI1_MOSI
* PROG_B - GPIO_175 - output (change mux)
* DONE - GPIO_173 - input (change mux)
* INIT_B - GPIO_114 - input (change mux)
*
*/
const unsigned int PROG_B = 175;
const unsigned int DONE = 173;
const unsigned int INIT_B = 114;
static std::string bit_file = "safe_u1e.bin";
const int BUF_SIZE = 4096;
enum gpio_direction {IN, OUT};
class gpio {
public:
gpio(unsigned int gpio_num, gpio_direction pin_direction);
bool get_value();
void set_value(bool state);
private:
std::stringstream base_path;
std::fstream value_file;
};
class spidev {
public:
spidev(std::string dev_name);
~spidev();
void send(char *wbuf, char *rbuf, unsigned int nbytes);
private:
int fd;
};
gpio::gpio(unsigned int gpio_num, gpio_direction pin_direction)
{
std::fstream export_file;
export_file.open("/sys/class/gpio/export", std::ios::out);
if (!export_file.is_open()) ///\todo Poor error handling
std::cout << "Failed to open gpio export file." << std::endl;
export_file << gpio_num << std::endl;
base_path << "/sys/class/gpio/gpio" << gpio_num << std::flush;
std::fstream direction_file;
std::string direction_file_name;
direction_file_name = base_path.str() + "/direction";
direction_file.open(direction_file_name.c_str());
if (!direction_file.is_open())
std::cout << "Failed to open direction file." << std::endl;
if (pin_direction == OUT)
direction_file << "out" << std::endl;
else
direction_file << "in" << std::endl;
std::string value_file_name;
value_file_name = base_path.str() + "/value";
value_file.open(value_file_name.c_str(), std::ios_base::in | std::ios_base::out);
if (!value_file.is_open())
std::cout << "Failed to open value file." << std::endl;
}
bool gpio::get_value()
{
std::string val;
std::getline(value_file, val);
value_file.seekg(0);
if (val == "0")
return false;
else if (val == "1")
return true;
else
std::cout << "Data read from value file|" << val << "|" << std::endl;
return false;
}
void gpio::set_value(bool state)
{
if (state)
value_file << "1" << std::endl;
else
value_file << "0" << std::endl;
}
static void prepare_fpga_for_configuration(gpio &prog, gpio &init)
{
prog.set_value(true);
prog.set_value(false);
prog.set_value(true);
#if 0
bool ready_to_program(false);
unsigned int count(0);
do {
ready_to_program = init.get_value();
count++;
sleep(1);
} while (count < 10 && !ready_to_program);
if (count == 10) {
std::cout << "FPGA not ready for programming." << std::endl;
exit(-1);
}
#endif
}
spidev::spidev(std::string fname)
{
int ret;
int mode = 0;
int speed = 12000000;
int bits = 8;
fd = open(fname.c_str(), O_RDWR);
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
}
spidev::~spidev()
{
close(fd);
}
void spidev::send(char *buf, char *rbuf, unsigned int nbytes)
{
int ret;
struct spi_ioc_transfer tr;
tr.tx_buf = (unsigned long) buf;
tr.rx_buf = (unsigned long) rbuf;
tr.len = nbytes;
tr.delay_usecs = 0;
tr.speed_hz = 48000000;
tr.bits_per_word = 8;
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
}
static void send_file_to_fpga(std::string &file_name, gpio &error, gpio &done)
{
std::ifstream bitstream;
std::cout << "File name - " << file_name.c_str() << std::endl;
bitstream.open(file_name.c_str(), std::ios::binary);
if (!bitstream.is_open())
std::cout << "File " << file_name << " not opened succesfully." << std::endl;
spidev spi("/dev/spidev1.0");
char buf[BUF_SIZE];
char rbuf[BUF_SIZE];
do {
bitstream.read(buf, BUF_SIZE);
spi.send(buf, rbuf, bitstream.gcount());
if (error.get_value())
std::cout << "INIT_B went high, error occured." << std::endl;
if (!done.get_value())
std::cout << "Configuration complete." << std::endl;
} while (bitstream.gcount() == BUF_SIZE);
}
int main(int argc, char *argv[])
{
gpio gpio_prog_b(PROG_B, OUT);
gpio gpio_init_b(INIT_B, IN);
gpio gpio_done (DONE, IN);
if (argc == 2)
bit_file = argv[1];
std::cout << "FPGA config file: " << bit_file << std::endl;
prepare_fpga_for_configuration(gpio_prog_b, gpio_init_b);
std::cout << "Done = " << gpio_done.get_value() << std::endl;
send_file_to_fpga(bit_file, gpio_init_b, gpio_done);
}
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