mirror of
https://github.com/saymrwulf/uhd.git
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99c2730bc9
- Also removes all references to boost/cstdint.hpp and replaces it with stdint.h (The 'correct' replacement would be <cstdint>, but not all of our compilers support that).
129 lines
3.6 KiB
C++
129 lines
3.6 KiB
C++
//
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// Copyright 2014 Ettus Research LLC
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#include <uhd/config.hpp>
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#include <uhd/exception.hpp>
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#include "e300_spi.hpp"
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#ifdef E300_NATIVE
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#include <boost/thread.hpp>
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#include <boost/format.hpp>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <linux/types.h>
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#include <linux/spi/spidev.h>
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namespace uhd { namespace usrp { namespace e300 {
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class spidev_impl : public spi
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{
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public:
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spidev_impl(const std::string &device)
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: _mode(SPI_CPHA),
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_speed(2000000),
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_bits(8),
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_delay(0)
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{
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int ret;
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_fd = open(device.c_str(), O_RDWR);
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if (_fd < 0)
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throw uhd::runtime_error(str(boost::format("Could not open spidev device %s") % device));
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ret = ioctl(_fd, SPI_IOC_WR_MODE, &_mode);
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if (ret == -1)
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throw uhd::runtime_error("Could not set spidev mode");
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ret = ioctl(_fd, SPI_IOC_RD_MODE, &_mode);
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if (ret == -1)
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throw uhd::runtime_error("Could not get spidev mode");
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ret = ioctl(_fd, SPI_IOC_WR_BITS_PER_WORD, &_bits);
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if (ret == -1)
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throw uhd::runtime_error("Could not set spidev bits per word");
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ret = ioctl(_fd, SPI_IOC_RD_BITS_PER_WORD, &_bits);
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if (ret == -1)
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throw uhd::runtime_error("Could not get spidev bits per word");
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ret = ioctl(_fd, SPI_IOC_WR_MAX_SPEED_HZ, &_speed);
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if (ret == -1)
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throw uhd::runtime_error("Could not set spidev max speed");
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ret = ioctl(_fd, SPI_IOC_RD_MAX_SPEED_HZ, &_speed);
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if (ret == -1)
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throw uhd::runtime_error("Could not get spidev max speed");
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}
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virtual ~spidev_impl()
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{
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close(_fd);
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}
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uint32_t transact_spi(int, const uhd::spi_config_t &,
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uint32_t data, size_t num_bits,
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bool)
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{
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int ret(0);
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struct spi_ioc_transfer tr;
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uint8_t *tx_data = reinterpret_cast<uint8_t *>(&data);
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UHD_ASSERT_THROW(num_bits == 24);
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uint8_t tx[] = {tx_data[2], tx_data[1], tx_data[0]};
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uint8_t rx[3];
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tr.tx_buf = (unsigned long) &tx[0];
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tr.rx_buf = (unsigned long) &rx[0];
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tr.len = num_bits >> 3;
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tr.bits_per_word = _bits;
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tr.tx_nbits = 1;
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tr.rx_nbits = 1;
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tr.speed_hz = _speed;
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tr.delay_usecs = _delay;
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ret = ioctl(_fd, SPI_IOC_MESSAGE(1), &tr);
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if (ret < 1)
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throw uhd::runtime_error("Could not send spidev message");
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return rx[2];
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}
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private:
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int _fd;
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uint8_t _mode;
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uint32_t _speed;
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uint8_t _bits;
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uint16_t _delay;
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};
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spi::sptr spi::make(const std::string &device)
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{
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return spi::sptr(new spidev_impl(device));
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}
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}}};
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#else
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namespace uhd { namespace usrp { namespace e300 {
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spi::sptr spi::make(const std::string &)
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{
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throw uhd::assertion_error("spi::make() !E300_NATIVE");
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}
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}}};
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#endif //E300_NATIVE
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