diff options
| -rw-r--r-- | host/lib/usrp/cores/gpio_core_200.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/host/lib/usrp/cores/gpio_core_200.cpp b/host/lib/usrp/cores/gpio_core_200.cpp index d756097ff..cdab70b8d 100644 --- a/host/lib/usrp/cores/gpio_core_200.cpp +++ b/host/lib/usrp/cores/gpio_core_200.cpp @@ -63,6 +63,7 @@ private: wb_iface::sptr _iface; const size_t _base; const size_t _rb_addr; + uhd::dict<size_t, boost::uint32_t> _update_cache; uhd::dict<unit_t, boost::uint16_t> _pin_ctrl, _gpio_out, _gpio_ddr; uhd::dict<unit_t, uhd::dict<atr_reg_t, boost::uint16_t> > _atr_regs; @@ -90,7 +91,12 @@ private: const boost::uint32_t ctrl = (boost::uint32_t(_pin_ctrl[dboard_iface::UNIT_RX]) << unit2shit(dboard_iface::UNIT_RX)) | (boost::uint32_t(_pin_ctrl[dboard_iface::UNIT_TX]) << unit2shit(dboard_iface::UNIT_TX)); - _iface->poke32(addr, (ctrl & atr_val) | ((~ctrl) & gpio_val)); + const boost::uint32_t val = (ctrl & atr_val) | ((~ctrl) & gpio_val); + if (not _update_cache.has_key(addr) or _update_cache[addr] != val) + { + _iface->poke32(addr, val); + } + _update_cache[addr] = val; } }; |