void WedgeI2CBus::selectQsfpImpl(unsigned int port) {
auto oldValues = getSwitchValues(selectedPort_);
auto newValues = getSwitchValues(port);
// One of the new values should be 0. Set this one first,
// to ensure that we never have more than one port selected at a time.
if (newValues.first == 0) {
if (newValues.first != oldValues.first) {
dev_->writeByte(ADDR_SWITCH_1, newValues.first);
}
selectedPort_ = NO_PORT; // In case the second write throws
if (newValues.second != oldValues.second) {
dev_->writeByte(ADDR_SWITCH_2, newValues.second);
}
} else {
if (newValues.second != oldValues.second) {
dev_->writeByte(ADDR_SWITCH_2, newValues.second);
}
selectedPort_ = NO_PORT; // In case the second write throws
if (newValues.first != oldValues.first) {
dev_->writeByte(ADDR_SWITCH_1, newValues.first);
}
}
selectedPort_ = port;
}
bool Switches::getSwitch(int num)
{
if (num >= 1 && num <= 4) {
return getSwitchValues() & (1 << (num-1));
}
else {
return false;
}
}
