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LPC11C24 demo optimization

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This commit is contained in:
Pavel Kirienko
2015-10-13 17:15:14 +03:00
parent eb104b45bd
commit e060962261
1 changed files with 9 additions and 8 deletions
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libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/main.cpp
+9 -8
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@@ -12,6 +12,15 @@
#include <uavcan/protocol/dynamic_node_id_client.hpp> #include <uavcan/protocol/dynamic_node_id_client.hpp>
#include <uavcan/protocol/logger.hpp> #include <uavcan/protocol/logger.hpp>
/*
* GCC 4.9 cannot generate a working binary with higher optimization levels, although
* rest of the firmware can be compiled with -Os.
* GCC 4.8 and earlier don't work at all on this firmware.
*/
#if __GNUC__
# pragma GCC optimize 1
#endif
/** /**
* This function re-defines the standard ::rand(), which is used by the class uavcan::DynamicNodeIDClient. * This function re-defines the standard ::rand(), which is used by the class uavcan::DynamicNodeIDClient.
* Redefinition is normally not needed, but GCC 4.9 tends to generate broken binaries if it is not redefined. * Redefinition is normally not needed, but GCC 4.9 tends to generate broken binaries if it is not redefined.
@@ -96,9 +105,6 @@ uavcan::NodeID performDynamicNodeIDAllocation()
return client.getAllocatedNodeID(); return client.getAllocatedNodeID();
} }
#if __GNUC__
__attribute__((noinline, optimize(2))) // Higher optimization breaks the code.
#endif
void init() void init()
{ {
board::resetWatchdog(); board::resetWatchdog();
@@ -192,16 +198,11 @@ void init()
filters[2].id = 0 | uavcan::CanFrame::FlagEFF; filters[2].id = 0 | uavcan::CanFrame::FlagEFF;
filters[2].mask = uavcan::CanFrame::MaskExtID | uavcan::CanFrame::FlagEFF; filters[2].mask = uavcan::CanFrame::MaskExtID | uavcan::CanFrame::FlagEFF;
const auto before = uavcan_lpc11c24::clock::getMonotonic();
if (uavcan_lpc11c24::CanDriver::instance().configureFilters(filters, NumFilters) < 0) if (uavcan_lpc11c24::CanDriver::instance().configureFilters(filters, NumFilters) < 0)
{ {
board::syslog("Filter init failed\r\n"); board::syslog("Filter init failed\r\n");
board::die(); board::die();
} }
const auto duration = uavcan_lpc11c24::clock::getMonotonic() - before;
board::syslog("CAN filter configuration took ");
board::syslog(intToString(duration.toUSec()).c_str());
board::syslog(" usec\r\n");
} }
/* /*