diff options
Diffstat (limited to 'host')
| -rw-r--r-- | host/lib/usrp/e100/e100_ctrl.cpp | 95 |
1 files changed, 45 insertions, 50 deletions
diff --git a/host/lib/usrp/e100/e100_ctrl.cpp b/host/lib/usrp/e100/e100_ctrl.cpp index 408d259dc..397543f14 100644 --- a/host/lib/usrp/e100/e100_ctrl.cpp +++ b/host/lib/usrp/e100/e100_ctrl.cpp @@ -76,49 +76,7 @@ private: /*********************************************************************** * Protection for dual GPIO access - sometimes MISO, sometimes have resp **********************************************************************/ -static boost::mutex gpio_has_resp_mutex; -static boost::condition_variable gpio_has_resp_cond; -static bool gpio_has_resp_claimed = false; -static gpio gpio_has_resp(147, "in"); - -struct gpio_has_resp_claimer -{ - gpio_has_resp_claimer(void) - { - boost::mutex::scoped_lock lock(gpio_has_resp_mutex); - gpio_has_resp_claimed = true; - } - - ~gpio_has_resp_claimer(void) - { - boost::mutex::scoped_lock lock(gpio_has_resp_mutex); - gpio_has_resp_claimed = false; - lock.unlock(); - gpio_has_resp_cond.notify_one(); - } -}; - -static inline bool gpio_has_resp_value(void) -{ - boost::mutex::scoped_lock lock(gpio_has_resp_mutex); - while (gpio_has_resp_claimed) - { - gpio_has_resp_cond.wait(lock); - } - return bool(gpio_has_resp()); -} - -static bool inline gpio_has_resp_wait(const double timeout) -{ - if (gpio_has_resp_value()) return true; - const boost::system_time exit_time = boost::get_system_time() + boost::posix_time::milliseconds(long(timeout*1e6)); - while (boost::get_system_time() < exit_time) - { - boost::this_thread::sleep(boost::posix_time::milliseconds(1)); - if (gpio_has_resp_value()) return true; - } - return false; -} +static boost::mutex gpio_irq_resp_mutex; /*********************************************************************** * Aux spi implementation @@ -129,8 +87,7 @@ public: spi_sclk_gpio(65, "out"), spi_sen_gpio(186, "out"), spi_mosi_gpio(145, "out"), - //spi_miso_gpio(147, "in"){} - spi_miso_gpio(gpio_has_resp){} + spi_miso_gpio(147, "in"){} boost::uint32_t transact_spi( int, const spi_config_t &, //not used params @@ -138,7 +95,7 @@ public: size_t num_bits, bool readback ){ - gpio_has_resp_claimer claimer(); + boost::mutex::scoped_lock lock(gpio_irq_resp_mutex); boost::uint32_t rb_bits = 0; this->spi_sen_gpio(0); @@ -158,7 +115,7 @@ public: } private: - gpio spi_sclk_gpio, spi_sen_gpio, spi_mosi_gpio, &spi_miso_gpio; + gpio spi_sclk_gpio, spi_sen_gpio, spi_mosi_gpio, spi_miso_gpio; }; uhd::spi_iface::sptr e100_ctrl::make_aux_spi_iface(void){ @@ -385,9 +342,16 @@ public: datax.buf[0] = 1; datax.buf[1] = 0; this->ioctl(USRP_E_WRITE_CTL16, &datax); + + std::ofstream edge_file("/sys/class/gpio/gpio147/edge"); + edge_file << "rising" << std::endl << std::flush; + edge_file.close(); + _irq_fd = ::open("/sys/class/gpio/gpio147/value", O_RDONLY); + if (_irq_fd < 0) UHD_MSG(error) << "Unable to open GPIO for IRQ\n"; } ~e100_ctrl_impl(void){ + ::close(_irq_fd); ::close(_node_fd); } @@ -407,16 +371,46 @@ public: /******************************************************************* * The managed buffer interface ******************************************************************/ - managed_recv_buffer::sptr get_recv_buff(double timeout){ - if (not gpio_has_resp_wait(timeout)) + UHD_INLINE bool resp_read(void) + { + //thread stuff ensures that this GPIO isnt shared + boost::mutex::scoped_lock lock(gpio_irq_resp_mutex); + + //perform a read of the GPIO IRQ state + char ch; + ::read(_irq_fd, &ch, sizeof(ch)); + ::lseek(_irq_fd, SEEK_SET, 0); + return ch == '1'; + } + + UHD_INLINE bool resp_wait(const double timeout) + { + //perform a check, if it fails, poll + if (this->resp_read()) return true; + + //poll IRQ GPIO for some action + pollfd pfd; + pfd.fd = _irq_fd; + pfd.events = POLLPRI | POLLERR; + ::poll(&pfd, 1, long(timeout*1000)/*ms*/); + + //perform a GPIO read again for result + return this->resp_read(); + } + + managed_recv_buffer::sptr get_recv_buff(double timeout) + { + if (not this->resp_wait(timeout)) { return managed_recv_buffer::sptr(); } + _mrb.ctrl = this; return _mrb.get_new(); } - managed_send_buffer::sptr get_send_buff(double){ + managed_send_buffer::sptr get_send_buff(double) + { _msb.ctrl = this; return _msb.get_new(); } @@ -439,6 +433,7 @@ public: private: int _node_fd; + int _irq_fd; boost::mutex _ioctl_mutex; e100_simpl_mrb _mrb; e100_simpl_msb _msb; |